An ion is formed when an atom gains or loses electrons.
Answer:
lose or gain electrons
A rectangular fence is 3 times as long as it is wide. The perimeter is 60ft. Find the dimensions of the fence
Answer:
The length of the fence is 22.5ft and the width of the fence is 7.5ft.
Explanation:
To solve this problem we will turn this question into an equation.
The equation for the perimeter of a rectangle is 2l + 2w = perimeter.
In the question we were given the perimeter so we can go ahead and plug this in.
2l + 2w = 60
In the question we are also told that the fence is 3 times as long as it is wide. This means that 1l = 3w. We can now subsitute l for 3w so that we only have one variable.
2(3w) + 2w = 60
Now we can simply use algebra to solve for w.
6w + 2w = 60
8w = 60
w = 7.5
Now that we know the value of w we can find the value of l since we know 1l = 3w.
l = 3w
l = 3(7.5)
l = 22.5
The length of the fence is 22.5ft and the width of the fence is 7.5ft.
What is the acceleration of a ball traveling horizontally with an initial velocity of 20 meters/second and, 2.0 seconds later, a velocity of 30 meters/second? A. 1.6 meters/second2 B. 3.0 meters/second2 C. 3.4 meters/second2 D. 5.0 meters/second2 Reset Next
Answer: Acceleration of the ball in the given system is 5 meter per Second Square
The laws of motion are used to determine various aspects of an object in motion.
Explanation:
Applying the first law of motion to calculate acceleration; if formula used in first law is given as [tex]v=u+at[/tex]
Here we have a final velocity as 40 meter per second and initial velocity as 20 meter per second and time span is given as 2 second applying the given values in the given equation and finding the value of a
[tex]30=20+a \times 2 = a=5 m/s^2[/tex]
Answer:
Centripetal acceleration is 47 m/s²
Explanation:
It is given that,
Radius of the circle, r = 1.8 meters
The velocity of the ball, v = 9.2 m/s
We have to find the centripetal force of a ball on a string that is whirled horizontally over a boy’s head. It is given by :
So, the centripetal acceleration of the ball on a string is 47 m/s². Hence, the correct option is (E).
Construction paper is bendable. is it physical property or chemical
Answer:
Physical.
Explanation:
A chemical property would more be its reaction to water vs acid
Final answer:
The bendability of construction paper is a physical property. Physical properties include characteristics that can be observed without changing the substance's chemical identity.
Explanation:
The ability of construction paper to bend is related to its physical properties. Physical properties can be observed or measured without changing the identity of the substance. In the case of construction paper, its flexibility is a physical property because it informs us about the paper's ability to bend or change shape without altering its chemical composition.
Among physical properties, we find characteristics such as color, density, and malleability, which also includes the paper's ability to bend. Materials like construction paper are designed to be flexible and are often used for activities that rely on bending and shaping without breaking.
How much space does 2 x 1022 atoms of copper take up?
Final answer:
2 x 10²² atoms of copper take up a volume of approximately 1.44 x 10²¹ cubic meters.
Explanation:
Copper atoms are incredibly small, and a single copper penny contains approximately 2 x 10²² copper atoms. To calculate how much space these atoms take up, we need to consider their mass and volume. The atomic mass of copper is 63.54 g/mol, and the density of copper is 8.80 x 10³ kg/m³. Using these values along with Avogadro's number (6.02 x 10²³ atoms/mol), we can calculate the volume occupied by 2 x 10²² atoms of copper.
First, we calculate the mass of 2 x 10²² atoms of copper:
Mass = Number of atoms x Atomic mass = 2 x 10²² x 63.54 g/mol = 1.27 x 10²⁴ g
Next, we use the density of copper to calculate the volume:
Volume = Mass / Density = 1.27 x 10²⁴ g / (8.80 x 10³ kg/m³ x 1000 g/kg) = 1.44 x 10²¹ m³
Therefore, 2 x 10²² atoms of copper take up a volume of approximately 1.44 x 10²¹ cubic meters.
If the density of gold is 19.3 g/cm3 what would be the volume of 550 g of gold?
Answer:
28.497 cm3
Explanation:
Formula
D=m/v
Given data:
density = 19.3g/cm3
mass = 550 g
Now we will put the values in formula:
V=m/d
V=550 g/ 19.3 g/cm3 = 28.497 cm3
So the volume of gold is 28.497 cm3.
PLEASE HELP ASAP !!! How to balance equations with brackets? Like Pb(NO3)2? How many of each element is there?
Answer:
There is 1 lead (Pb) element, 2 nitrogen (N) elements and 6 oxygen (O) elements.
Explanation:
Brackets in chemistry work the same like in maths. You multiply each element in the bracket depending on the power. In this case, we have a nitrogen atom and three oxygen atoms, in brackets, with a power of 2. You multiply the nitrogen atoms by 2, ending up with 2 nitrogen atoms, and you multiply the oxygen atoms by 2, ending up with 6.
Answer: Pb2N4O12
Explanation: Pb = 1 X 2= 2 N = 2 x 2 = 4 O = 2+8+2 = 12
BRAINLIEST!!! Please answer
1,000 times the base unit is kilo
1/1,000,000 of the unit base is micro
1/100 of the base unit is centi
1,000,000 times the base unit is mega
1/1,000 of the base unit is milli
1/1,000,000 of the base unit is nano
hope this helps :)
Identify the isotope where A equals 49 and Z equals 22.
A) Indium-22
B) Indium-27
C) Indium-49
D) Titanium-22
E) Titanium-27
F) Titanium-49
G) None of the choices are correct.
Answer:
D) Titanium-22
Explanation:
Titanium is one of the transition metal elements. It is the 22nd element on the periodic table.
From the statement of the problem:
A is the mass number of the unknown atom which is 49. The mass number is the number of protons and neutrons in the nucleus of the atom.
Z is the atomic number of the unknown atom which is 22. The atomic number is the number of protons in an atom. It is the same as the number of electrons for a neutral atom.
To identify the element, we simply use the atomic number because the periodic table of element is a function of the atomic number Therefore, the element with atomic number 22 on the periodic table is Titanium.
How many atoms are in 52.3 g of lithium hypochlorite (LiClO)?
Answer:
1.62 × 10²⁴ atoms are in 52.3 g of lithium hypochlorite.
Explanation:
To find the amount of atoms that are in 52.3 g of lithium hypochlorite, we must first find the amount of moles. We do this by dividing by the molar mass of lithium hypochlorite.
52.3 g ÷ 58.4 g/mol = 0.896 mol
Next we must find the amount of formula units, we do this be multiplying by Avagadro's number.
0.896 mol × 6.02 × 10²³ = 5.39 × 10²³ f.u.
Now to get the amount of atoms we can multiply the amount of formula units by the amout of atoms in one formula unit.
5.39 × 10²³ f.u. × 3 atom/f.u. = 1.62 × 10²⁴ atoms
1.62 × 10²⁴ atoms are in 52.3 g of lithium hypochlorite.
There are 1.62 × 10²⁴ atoms in 52.3 g of lithium hypochlorite.
First, we will convert 52.3 g to moles using the molar mass of LiClO (58.4 g/mol).
[tex]52.3 g \times \frac{1 mol}{58.4 g} = 0.896 mol[/tex]
Then, we will convert 0.896 moles to molecules using Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
[tex]0.896 mol \times \frac{6.02 \times 10^{23} molecule }{1 mol} = 5.39 \times 10^{23} molecule[/tex]
According to the chemical formula, there are 3 atoms in each molecule of LiClO. The number of atoms in 5.39 × 10²³ molecules of LiClO is:
[tex]5.39 \times 10^{23} molecule \times \frac{3 atom}{1 molecule} = 1.62 \times 10^{24} atom[/tex]
There are 1.62 × 10²⁴ atoms in 52.3 g of lithium hypochlorite.
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what is an example of a testable scientific question
Answer:
what are stars made of?
Explanation:
that's what google says
GET BRAINLIEST
Which kind of organism obtains energy only from producers?
Group of answer choices
herbivores
all of the above
decomposers
omnivores
Question
Which of the following best describes a population?
Group of answer choices
all the red birds in an area
all members of the same species
members of the same species living in the same place at the same time
all types of organisms living in the same place
Question
Which of the following describes soil and temperature in an ecosystem?
Group of answer choices
unnecessary factors
biotic factors
abiotic factors
selection factors
Question
A forest fire wipes out all of the plant life in an area, causing the animals to leave. The ground becomes a mixture of soil and ashes. Which order of succession is most likely to occur in the area?
Group of answer choices
grasses → shrubs → softwood trees → hardwood trees
hardwood trees → shrubs → softwood trees → mosses
softwood trees → shrubs → mosses → lichens
bare rock → grasses → shrubs → hardwood trees
Question
After a town is abandoned, the concrete parking lots remain empty and inactive for hundreds of years. What is the most likely order of ecological succession in that area?
Group of answer choices
lichens → grass → shrubs → trees
shrubs → grass → trees → lichens
grass → trees → lichens → moss
lichens → grass → trees → shrubs
Question
The graphs show the trends in biodiversity of land-based life and marine-based life.
Group of answer choices
biodiversity is stable for marine-based life but is not stable for land-based life.
the sustainability of ecosystems is increasing more in protected areas.
biodiversity is increasing in unprotected areas and decreasing in protected areas.
the sustainability of ecosystems is decreasing regardless of protected areas.
Question
Read the passage "Easter Island Palm."
EASTER ISLAND PALM
In the 1400s, the Easter Island palm became extinct due to overharvesting. Reproduction was nearly impossible because islanders introduced rats when they first arrived. These rats ate the Easter Island palm seeds, preventing the Easter Island palm from flourishing. With the disappearance of the palm, the islanders could no longer build the boats they needed for fishing.
Group of answer choices
a decrease in the temperature, leading to decreased biodiversity
an increase in the islanders' consumption of land and migratory birds, resulting in a decrease in the bird population
the loss of pollinating birds to the island, resulting in a decrease in the variety of plant life on the island
the erosion of topsoil, leading to decreased crop production
Question
The primary reason that the human population has grown rapidly over the past 100 years is that there has been
Group of answer choices
a decrease in cancer rates due to scientific research.
an increase in food supplies and better access to clean water.
more access to light and electricity.
more access to renewable resources.
Question
Which of the following would cause a decrease in a population's size?
Group of answer choices
emigration
decreased death rate
increased natality
immigration
Question
Decisions made by the current generation
Group of answer choices
will not limit any possibilities for future generations.
should not include considerations of possibilities of future generations.
can open or limit possibilities of future generations.
should only be concerned with opening possibilities for future generations.
Question
In order to feed the growing population, scientists have found ways to increase the yield of a crop. What does the term yield mean?
Group of answer choices
Amount of food produced in an area.
Amount of land needed for a crop.
Amount of water used while irrigating.
Amount of chemicals used on crops.
Question
Which factor can cause secondary succession?
Group of answer choices
competition
glacial melting
clear cutting
predation
Question
What is the role of a pioneer species in primary succession?
Group of answer choices
to destroy parasites
to create shade
to provide fruit
to create the soil
Question
The number of rhinoceroses has decreased to near extinction. How are rhinoceroses classified under the Endangered Species Act?
Group of answer choices
extinct
pioneer
endangered
threatened
Question
Lions live in groups called prides. Lion populations would most likely fall in which category of population distribution?
Group of answer choices
even
density
clumped
random
Answer:
Herbivores
Members of the same species living in the same plac at the same time
Abiotic Factors
grasses → shrubs → softwood trees → hardwood trees
lichens → grass → shrubs → trees
the sustainability of ecosystems is decreasing regardless of protected areas.
an increase in the islanders' consumption of land and migratory birds, resulting in a decrease in the bird population
More access to renewable resources
Emigration
Can open or limit possibilities of future generations
Amount of food produced in an area
Clear Cutting
To create the soil
Endangered
Clumped
Explanation:
Answer:
As given below.
Explanation:
1. herbivores.
2. By all the types of organisms living in the same place.
3. Abiotic factors.
4. the hardwood trees to shrubs and softwood trees then to mosses.
5. From lichens to grass to shrubs and trees.
6. sustainability of the ecosystems is increasing more in protected areas.
7. the erosion of topsoil, leading to decreased crop production.
8. an increase in food supplies and better access to clean water.
9. emigration
10. will not limit any kind of possibilities for future generations.
11. It is the amount of land needed for a crop.
12. clearcutting
13. to create the soil.
14. threatened.
15. clumped
Which phrase describes an iron ore?
an iron–carbon alloy
a pure metal
an ionic compound of iron
a rock containing a lot of iron
Answer:
a rock containing a lot of iron
Explanation:
Iron ore is an ore of iron and this implies a rock that contains a substantial amount of iron.
An ore is a naturally occurring rock type that hosts a certain type of metal or solid that can be won at profit with some gangue minerals. Iron ore is one such type of substance from which significant amount of iron can be extracted for use by man. The remaining part quite not useful is the gangue.
1. Something must have mass in order to create change.
A. True
B. False
2. Powdered medicine fills a pill capsule. Which of the following is the best description of the state of the powder?
A. It is a solid because all powders are solid.
B. It is a gas because it takes up the entire volume of the pill capsule.
C. It is a liquid because it does not hold a definite shape.
3. Find an example of something that you do NOT know the state of. Describe it, and tell me your best guess of what state it is. Explain your guess.
These are three questions each with its complete answer.
Question 1. Something must have mass in order to create change.
A. True
B. False
Answer:
FalseExplanation:
Two counter examples will prove that the statement is false.
light and fireNeither light nor fire have mass, so they are not considered matter, but yet both can create changes.
Light is an electromagnetic wave, so it is energy, and as such it, of course, can cause some changes. One example are the chemical reactions, like photosynthesis, which require light to happen.
Ligth may also be described either as quanta named photons. Although photons behave like particles they do not have mass.
So, that example contradicts the statement that something must have mass in order to create change.
Fire also contradicts the statement. Fire is a manifestation of energy, it does not have mass, and sure you know how fire create changes in living and no living things.
Question 2. Powdered medicine fills a pill capsule. Which of the following is the best description of the state of the powder?
A. It is a solid because all powders are solid.
B. It is a gas because it takes up the entire volume of the pill capsule.
C. It is a liquid because it does not hold a definite shape.
Answer: the best description is the choice A:
A. It is a solid because all powders are solid.Explanation:
Indeed, although sometimes the powder may be very fine (dust), yet it is not liquid or gas. Powders are always solid.
There are four main states of matter: solid, liquid, gas, and plasma.
Liquids are able to take the form of the container but do not occupy the entire container. Gases do occupy the entire container.
When powder is very fine it could resemble some properties of liquid, but the structure of powders is not crystaline, this is it is not an ordered arrangement. The structure of powders is an ordered arrangement, so powders are solids and not liquids.
It is easy to discard that a powdered medicine could be a gas, because it definetly do not occupy the entire volume of the pill capsule.
Question 3. Find an example of something that you do NOT know the state of. Describe it, and tell me your best guess of what state it is. Explain your guess.
Answer:
Two examples come to my mind:
A paste like Nutella or toothpasteWax of a candleExplanation:
I will use the example of Nutella to complete the answer.
Nutella is not a gas because when you open the jar it will not escape and fill the room around it.
When you put Nutella in a plate it will not flow over the whole plate, is it a solid ? But yet you can spread it easyly over a cookie. Is it a liquid?
So, Nutella behaves like a solid until you apply some force over it and then it seems a liquid.
I would guess that pastes are solids because they should have an inner structure that keep the particles together.
If you do some research you will find that pastes are neither liquid nor solids, they are named gels. And gels may be seen as a dispersion of molecules of a liquid within a solid, i.e. in liquid particles dispersed in the solid medium
This sure meets the requirements of this question.
6.0 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 138 g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured:
carbon dioxide - 13.39 g
water - 2.35 g
Use this information to find the molecular formula of X.
Answer:
The molecular formula of X is given as [tex]C_7 H_6 O_3[/tex]
Explanation:
[tex]Moles $C O_{2}=\frac{\text { mass }}{\text { molar mass }}=\frac{13.39 \mathrm{g}}{44.01 \mathrm{g} \text { per mole }}=0.304 \mathrm{mol}$\\\\moles $\mathrm{C}=$ moles $\mathrm{CO}_{2}=0.304 \mathrm{mol}$[/tex]
[tex]mass $C=$ moles $\times$ molar mass $=0.304 \mathrm{mol} \times 12 \frac{g}{m o l}=3.65g$\\\\moles $\mathrm{H}_{2} \mathrm{O}=\frac{2.35 \mathrm{g}}{18.02 \mathrm{g} \text { permole }}=0.130 \mathrm{mol}$\\\\moles $\mathrm{H}=2 \times$ moles $\mathrm{H}_{2} \mathrm{O}=0.130 \times 2=0.260 \mathrm{mol}$\\\\Mass $\mathrm{H}=0.260 \mathrm{mol} \times 1.008 \frac{g}{\mathrm{mol}}=0.262 \mathrm{g}$[/tex]
mass O = Total mass of the compound - (mass of C + mass of H)
=6.0 g - ( 3.65 + 0.262 ) g
=2.09 g
[tex]moles $O=\frac{2.09 g}{16 g \text { per mole }}=0.131 \mathrm{mol}$[/tex]
Least moles is for O that is 0.131mol and dividing all by the least we get
[tex]$\begin{aligned} C &=\frac{0.304}{0.131}=2.3 \\\\ H &=\frac{0.260}{0.131}=2 \\\\ O &=\frac{0.131}{0.131}=1 \end{aligned}$[/tex]
Since 2.3 is a fraction it has to be converted to a whole number so we multiply all the answers by 3
[tex]\\$C 2.3 \times 3=7$\\\\$H 2 \times 3=6$\\\\$O 1 \times 3=3$[/tex]
So the empirical formula is [tex]C_7 H_6 O_3[/tex]
Empirical formula mass
[tex]=(7 \times 12) +(6\times1.008)+(3\times16)=138.048g[/tex]
[tex]$n=\frac{\text { molar mass }}{\text { empirical formula mass }}=\frac{138}{138.048}=1$[/tex]
Molecular formula =n × empirical formula
[tex]=1 \times C_7 H_6 O_3[/tex]
Compound X = [tex]C_7 H_6 O_3[/tex] is the Answer
To find the molecular formula of Compound X, we calculate the empirical formula using the moles of carbon dioxide and water produced. The empirical formula is CH2O. The molecular formula is (CH2O)5.
Explanation:To find the molecular formula of Compound X, we need to determine the empirical formula first. From the given information, we can calculate the moles of carbon dioxide and water produced. The moles ratio of carbon to oxygen in carbon dioxide is 1:2, while the moles ratio of hydrogen to oxygen in water is 2:1. Using these ratios, we can find the moles of carbon, hydrogen, and oxygen in Compound X. The empirical formula of X is CH2O.
The molar mass of the empirical formula is 30 g/mol. To find the molecular formula, we divide the molecular molar mass of X by the molar mass of the empirical formula. Dividing 138 g/mol by 30 g/mol gives us approximately 4.6, which we can round to 5. This means the molecular formula of X is (CH2O)5.
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Find the value of
17/15 •2/11
Answer:
17/15 x 2/11 = 34/165
A liquid has a volume of 3.70 L What is its volume in ml? In cm^3
Answer:
3700 mL; 3700 cm³
Explanation:
1. Volume in millilitres
[tex]V =\text{3.70 L} \times \dfrac{\text{1000 mL}}{\text{1 L}} = \text{ 3700 mL}[/tex]
2. Volume in cubic centimetres
1 mL = 1 cm³, so
[tex]V = \text{3700 mL} \times \dfrac{1\text{ cm}^{3}}{\text{1 mL}} = \text{3700 cm}^{3}[/tex]
The volume of the liquid in mL is 3700mL and in cm3 is 3700 cm3.
Measurement transformation
First, to change the unit of a value from liters to milliliters, it is necessary to follow the following relationship:
[tex]1 L = 1000mL[/tex]
Thus, the calculation can be performed:
[tex]3.70L \times 1000 = 3700 mL[/tex]
Finally, to change the unit from mL to cm3 we have:
[tex]1 cm^{3} = 1 mL[/tex]
[tex]3700 mL \times 1 = 3700 cm^{3}[/tex]
So, the volume of the liquid in mL is 3700mL and in cm3 is 3700 cm3.
Learn more about measurement transformation in: brainly.com/question/10667910
Unscramble the word in the brackets
The atoms in an element are all
(L I N T A I C E D) ___________.
true or false Liquid particles move faster than gas particles
If the liquid and the gas are both the same substance, then the gas particles are moving faster than the liquid particles, and this statement is false.
If they're different substances ... like for example liquid iron and oxygen gas ... then it could go either way, depending on the substances.
The statement that liquid particles move faster than gas particles is generally false. At the same temperature, gas particles typically move faster than liquid particles due to the difference in kinetic energy and intermolecular forces.
Explanation:The statement 'Liquid particles move faster than gas particles' is generally false. The speed of particles depends on their temperature, not their state. However, at the same temperature, gas particles typically move faster than liquid particles.
This is due to the fact that gas particles have more kinetic energy and less intermolecular forces restricting their movement compared to liquid particles. For instance, particles in steam (gas) would move faster than particles in water (liquid) at the same temperature.
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PLEASE HELP
Manuel observes a chemical reaction between one atom of silicone and two atoms of oxygen which answer choice correctly list the Chemical formula of the compound produced by the reaction?
SI1+O2-
Si1O2
SIO^2
SIO2
Answer:
The answer is SiO2
Explanation:
Silocon dioxide is written without a 1 after the silocon and with a 2 after the oxygen.
A group of science students collect bacterial swabs from several locations inside their school. The collected bacterial swabs are spread over an agar-filled petri dish and bacteria colonies are grown. The students then install hand sanitizer dispensers throughout the school. One month later the students collect bacterial swabs from the same locations around the school and bacteria colonies are grown. Bacterial growth is counted for each sample and the data is compared.
What might be the question the students are asking in this experiment?
A) How long does bacteria live
B) Why does bacteria grow at schools
C) Does my school have more bacteria than the average school?
D) Does the addition of hand sanitizer dispensers throughout the school reduce the amount of bacteria?
d because they want to detemine the cause of bacterial growth
Answer:
im guessing D
Explanation:
What is a buffer?
A. An acid-base conjugate pair that changes the reaction rate
B. An acid-base conjugate pair that changes dissociation constants. c. An acid-base conjugate pair that precipitates out salts
D. An acid-base conjugate pair that keeps the pH from changing
Answer: D. An acid-base conjugate pair that keeps the pH from changing
Explanation: the answer is D. An acid-base conjugate pair that keeps the pH from changing, because we have to keep in mind which is the scope of this solution, and the scope is maintain the pH despite the changes in the solutions or support any change when you add another solution to the buffer.
also we need to know that a Buffer achieve their resistance to the changes of the pH, because of the presence of an equilibrium between the acid HA and its conjugate base.
This equilibrium give the properties to this solution to support the changes.
What is the maximum number of electrons that can occupy the third (n=3) shell?
A) 2
B) 3
C) 6
D) 8
E) 18
The maximum number of electrons that can occupy the third (n=3) shell is 18
Answer: Option E
Explanation:
Every shell can only have a certain number of electron: the first shell have up to 2 electrons, the second have up to 8 (2 + 6) electrons, up to eighteen electron for third shell like (2+6+10), etc. The formula to calculate is,
For nth shell, it can generally contain up to [tex]2 n^{2}[/tex] electrons.
We make use of the formula [tex]2 n^{2}[/tex] where “n” is the number of the shell, to find the number of electrons a shell occupies.
So, if n=3 then using the value in the formula, we have [tex]2 \times 3 \times 3=18[/tex] electrons . Hence, third shell holds up to 18 electrons.
The maximum number of electrons that can occupy the third (n=3) shell is 18. Option E is correct.
What is electrons ?The maximum number of electrons that can occupy a given electron shell can be calculated using the formula [tex]2n^2,[/tex]where "n" is the principal quantum number of the shell. For the third shell (n=3), the maximum number of electrons would be:
[tex]2 * 3^2[/tex]= 18
The maximum number of electrons that can occupy the third (n=3) shell is 18
Therefore, Option E is correct.
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The chart shows the time, initial velocity, and final velocity of three riders. A 4-column table with 3 rows. The first row labeled rider has entries Gabriella, Franklin, Kendall. The second row labeled time with entries 10 seconds, 8.5 seconds, 6 seconds. The third column labeled initial velocity has entries 55, 50, 53.2. The fourth column labeled final velocity has entries 32, 50, 67. Which best describes the riders? Gabriella is speeding up at the same rate that Kendall is slowing down, and Franklin is not accelerating. Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating. Gabriella and Franklin are both slowing down, and Kendall is accelerating. Gabriella is slowing down, and Kendall and Franklin are accelerating.
Answer:
The option which best describes the riders is :
Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating
Explanation:
Franklin is not accelerating as the final velocity (50 km/h) is equal to the initial velocity (50 km/h) , rather he is moving at a constant speed.
Acceleration = (final velocity - initial velocity) / (final time - initial time)
According to acceleration formula given above , the rate at which Gabriella is slowing down is 2.3 km/h and the rate at which Kendall is speeding up is also 2.3 km/h.
Hence the option stating "Gabriella is is slowing down at the same rate that Kendall is speeding up and Franklin is not accelerating" is true and it best describes the riders.
Answer: B.
B. Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating.
Consider the temperature versus time graph below. I which region is the substance in both the solid phase and the liquid phase? 1 2 3 4
Answer:
2
Explanation:
The change of state occurs at a constant temperture and pressure. In the grahp we can see while the time passes, the temperature doesn't change.
The rect number 4 correspond to a liquid-gas phase
Answer : The stage 2 shows the substance in both the solid phase and the liquid phase.
Explanation :
In the given phase diagram,
Stage 1 : It shows the solid state of a substance.
Stage 2 : It shows the melting and freezing process of a substance. It means that when the phase changes from solid state to liquid state at constant temperature is know as melting process and when the phase changes from liquid state to solid state at constant temperature is know as freezing process.
Stage 3 : It shows the liquid state of a substance.
Stage 4 : It shows the evaporation and condensation process of a substance. It means that when the phase changes from liquid state to gaseous state at constant temperature is know as evaporation process and when the phase changes from gaseous state to liquid state at constant temperature is know as condensation process.
Stage 5 : It shows the gaseous state of a substance.
Hence, from the above information we conclude that the stage 2 shows the substance in both the solid phase and the liquid phase.
What volume (in L) of a 1.25 M
potassium fluoride (KF) solution
would be needed to make 455 mL of
a 0.838 M solution by dilution?
[?]LKF
Answer:
V1= 0.305L
Explanation:
To find the initial volume of 1.25M potassium fluoride needed to make tge dilution specified in the question, we can use: C1 × V1 = C2 × V2
Since the question wants the volume in litres, convert 455 mL to L
455/ 1000
= 0.455 L
Now make the substitution
1.25 × V1 = 0.838 × 0.455
Rearrange to make V1 the subject
V1=
[tex] \frac{0.838 \times 0.455}{1.25 } = 0.305 [/tex]
Answer:
0.305
Explanation:
0.305
How many grams of H are in 1.52 grams acetic acid
To find the grams of Hydrogen in 1.52 grams of acetic acid, calculate the fraction of acetic acid's weight that is made up of Hydrogen (approximately 6.7%), then multiply this by the weight of the acetic acid. Thus, there would be approximately 0.102 grams of Hydrogen in 1.52 grams of acetic acid.
Explanation:In order to determine the grams of Hydrogen in 1.52 grams of acetic acid, we first need to know the molecular weight of acetic acid (C2H4O2), which is about 60.05 g/mol. Acetic acid has 4 Hydrogen atoms. Each Hydrogen atom has an atomic weight of approximately 1.01 g/mol. Therefore, the total weight of Hydrogen in one molecule of acetic acid is 4.04 g/mol.
Next, we find the fraction of the weight of acetic acid that is made up of Hydrogen by dividing the total weight of Hydrogen by the molecular weight of acetic acid. So, 4.04 g/mol divided by 60.05 g/mol equals approximately 0.067 or 6.7%.
Finally, we multiply the weight of the acetic acid (1.52 grams) by the fraction that is Hydrogen (0.067). That's about 0.102 grams. Therefore, in 1.52 grams of acetic acid, there would be approximately 0.102 grams of Hydrogen.
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Which of the following objects has the greatest kinetic energy?
A .O a baseball flying tough the air at 90 miles per hour
B.a baseball flying through the air at 45 miles per hour
C. a baseball flying through the air at 20 miles per hour
D. a baseball sitting on the ground
Answer:
Answer : A
Explanation:
O
A baseball flying tough the air at 90 miles per hour
4. How do the atomic numbers of the elements
within each of Groups 1, 2, and 13-18 of the
periodic table vary?
Answer:
From the arrangement of electrons
Explanation:
The atomic numbers of the elements in the various groups differ because they contain different numbers of protons.
Atomic number of an element is the number of protons in that element and it is a property that is used to distinguish one element from another.
Elements are substances that contains atoms which cannot be broken down further into any smaller substances.
Periodic table is a structured table that arranged these elements according to the number of atoms they contain in their shells.
In a periodic table, these elements appear in periods and in groups.
The groups contain elements that share the same number of atoms in their outermost shell.
Therefore, group 1, 2, 13 and 18 contain elements that vary because they contain different numbers of protons.
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if Two elements react when placed in a test tube and form one new product what would the new product be?
Answer:
Explanation:
The new product is a compound which is a product of combination of two reactants. This form of reaction is called Synthesis or combination. It involves the formation of compounds from the union of constituent elements in a reaction.
A compound is composed of two or more kinds of elements that are joined together in a definite grouping.
What is carbons amount of electrons!
Answer: 2, 4
Explanation:
Carbon varies, so it can have either 2 or 4 electrons
Answer:
2, 4
Explanation: