Answer:
1. Color Change
2. Change in temperature
3. Noticiable Odor
4. Formation of bubbles
A chemical change, usually irreversible, results in the formation of new substances, the release or absorption of energy, and sometimes the production of gases or solids. Indicators of a chemical change include changes in color, production of a gas, formation of a precipitate, and changes in temperature.
Explanation:A chemical change is a process that results in the transformation of one set of chemical substances to another. During this type of change, the atoms in the reactants rearrange to form one or more different substances, and this is usually an irreversible process. Some common results of a chemical change can include the formation of new substances, the release or absorption of energy, and the production of gases or solid materials.
Four indicators of a chemical change are:
Change in color: For example, when you heat a green copper wire, it may turn black due to the formation of copper oxide.Production of a gas: This can be seen in the effervescence or bubbling when you combine baking soda and vinegar.Formation of a precipitate: A precipitate is a solid that forms from a solution during a chemical reaction. For example, when you mix solutions of silver nitrate and sodium chloride, a white precipitate of silver chloride forms.Change in temperature: Many chemical reactions release or absorb heat. For example, the burning of wood releases heat.Learn more about Chemical Change here:https://brainly.com/question/31633022
#SPJ2
Which of the following masses is the largest?
O 0.020 kg
0 20.0 mg
O 0.200 g
O 2000 ug
Answer:
0.020 kg=20 g this the largest
20.0 mg=.020g
.200g
2000ug
Explanation:
Final answer:
The largest mass among the given options is 0.020 kg, as it is already in kilograms and larger than the other masses when they are converted to the same unit.
Explanation:
The question asks which of the following masses is the largest:
0.020 kg
20.0 mg
0.200 g
2000 ug
To compare them, we need to express them all in the same unit, which is kilograms (the SI base unit of mass).
0.020 kg remains the same.
20.0 mg = 20.0 x 10⁻⁶ kg = 0.000020 kg
0.200 g = 0.200x 10⁻³ kg = 0.000200 kg
2000ug = 2000x 10⁻⁹ kg = 0.000002 kg
After converting, we can see that 0.020 kg is the largest mass among the given options.
One of the following properties was originally used to arrange elements in the periodic table but is no longer used to organize the modern version which property fits the description
Answer:
atomic mass
Explanation:
Answer:
atomic weight or atomic mass.
Explanation:
The development of periodic table starts from the Dobereiner's law of triad where he arranged the elements based on the average of atomic weight of two elements. the middle element was supposed to one with the atomic weight average of the two other elements.
Then the Newland law of octave was proposed where he observed the changes in the periodic trend based on atomic weight after seven elements.
Later Mendleev arranged the elements based on atomic weight only.
Thus the answer is atomic weight or atomic mass.
In modern version we use atomic number to arrange elements.
How much HNO3 is in a 100g solution that is 32% HNO3 by mass
Answer:
32 g of HNO3
Explanation:
Data Given:
Solution= 32% HNO3 by Mass
Amount of HNO3 in 100g Solution = ?
Solution:
% solution by mass = mass of solute/total mass of solution × 100 %
So,
32% HNO3 = 100g of solution contains 32 grams of HNO3
now applying the unity method
if 100 g of solution contains 32g of HNO3
Then 1g of solution will contain = ………. 32/100
So 100g of solution contain = 32x100/100= 32 g of HNO3
hurry plz
\
Victor made the graph shown to record the observations of an experiment to study the effect of soil additives on the growth of plants. Three identical plants having a height of 25 cm were used for the experiment. The first plant had no soil additives, the second plant had wheat straw in the soil, and the third plant had polymer in the soil. All other growing conditions of the plants were kept constant.
Which correct step in the scientific method did Victor most likely do before the step described here?
Analyze the data
Publish the results
Construct a hypothesis
Make conclusions based on the graph
How is volume calculated given mass and density?
Sum of mass and density
Mass divided by density
Mass multiplied by density
Difference of mass and density
The correct steps in the scientific method did vector most likely do before the step described is make conclusion based on the graph. Thus option c is correct.
How is volume calculated given mass and density?Victor made the graph shown to record the observations of an experiment to study the effect of soil additives on the growth of plants.
Three identical plants having a height of 25 cm were used for the experiment. The first plant had no soil additives, the second plant had wheat straw in the soil, and the third plant had polymer in the soil. All other growing conditions of the plants were kept constant.
Volume is calculated if the mass and density are given as below:
As we know that density is mass per unit volume it means 1 kg of mass in 1 cubic meter is called volume.
So, mathematically
Density = mass/ volume
Then
Volume = mass/density
S.I unit of volume is cubic meter.
Therefore, The correct steps in the scientific method did vector most likely do before the step described is make conclusion based on the graph. Thus option c is correct.
Learn more about mass and density here:
https://brainly.com/question/10821730
#SPJ2
The correct step in the scientific method did Victor most likely do before the step described here is option C: Construct a hypothesis
Volume is calculated by dividing the mass of an object by its density. So, the correct option is option b: Mass divided by density
Which correct step in the scientific method did Victor most likely doScientists usually begin by creating a hypothesis before doing an experiment and gathering information.
A hypothesis is an idea or guess that can be tested to explain something we are studying.
In this situation, Victor would have guessed how adding things to the soil (like wheat straw and polymer) would change how plants grow, compared to plants without any added things.
Read more about scientific method here:
https://brainly.com/question/17216882
#SPJ3
conversion question i cant find the right format online so
Answer:
[tex]\frac{46 g}{1 mL}[/tex] × [tex]\frac{1 kg}{1000 g}[/tex]
= [tex]\frac{46 kg}{1000 mL}[/tex]
= [tex]\frac{46 kg}{1 L}[/tex]
Explanation:
Since 1 kg is equal to 1000 g we multiply 46g/1mL by 1kg/1000g. Grams being on the bottom of the fraction so that they will cancel out. After this calculation we have 46kg/1000mL. This is equal to 46kg/1L, also written as 46kg/L.
Define Newton's 1st and 2nd laws of motion and give an example of each law.
Please gelpp
First Law: An object in motion will stay in motion unless acted on by an unbalanced force. An object at rest will stay at rest unless acted on by an unbalanced force.
Lets say a cup is sitting on a table, if you fall into that table and knock over the cup you are the unbalanced force acting upon the cup. The cup is at rest until you (the unbalanced force) acted upon it.
Second Law: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Say you are at the Supermarket. Its easier to push the empty shopping cart. Once the cart is filled you must exert more force to push it. This is because the empty cart has less mass than the full one.
If 980kJ of energy as heat are transferred to 6.2L of water at 291 K what will the final temperature be? The specific heat of water is 4.18 J/g•K. Assume that 1.0 mL of water equals 1.0 g of water.
Answer:
Final temperature = T₂ = 328.815 K
Explanation:
Given data:
Given energy = 980 KJ = 980×1000= 980000 J
Volume = 6.2 L
Initial temperature =T₁= 291 K
Specific heat of water = 4.18 j /g .K
Final temperature = T₂ = ?
Formula:
Q = m. c . ΔT
ΔT = T₂ - T₁
we will first convert the litter into milliliter
6.2 × 1000 = 6200 mL
It is given in question that
1 mL = 1 g
6200 mL = 6200 g
Now we will put the values in formula,
Q = m. c . (T₂ - T₁)
980000 j = 6200 g . 4.18 j /g .K . (T₂ - 291 K)
980000 j = 25916 j/ k . (T₂ - 291 K)
980000 j / 25916 j/ k = T₂ - 291 K
37.8145 K + 291 K =T₂
T₂ = 328.815 K
Which unit would be most appropriate for measuring the volume of water in a swimming pool?
the volume ( in gallons)
During which change is heat energy released?
A. Melting
B. Boiling
C. Sublimation
D. Condensation
Answer:
Condensation
Explanation:
In consideration the temperature does not change so the heat change the state of the substances
Answer:
A
Explanation:
because the substance is using the pressure of heat to melt the substance
Due in 30 minutes
how is chemical activity used to separate copper from its ores
Explanation:
You can use copper's chemical activity to extract copper from an ore. In the process of electrolysis, and electric current breaks the chemical bond that joins the metal and other elements in the compound. ... When iron ore and a source of carbon are heated together, the iron is released
Which has a great influence on one’s sense of self, in addition to self-confidence, self-respect, and values?
attitude
actions
perceptions
beliefs
Answer:
attitude
Explanation:
if your in k12 health attitude is the answer. perceptions was wrong
An attitude has a great influence on one’s sense of self, in addition to self-confidence, self-respect, and values.
So, first option is correct one.
What contributes to our self of sense?The self of sense also refer as ego , individuality and personality.
The things which contributes identity as a person are,
Your belief systemPersonality triedAbilitieslike and dislikelearn about self-confidence.
https://brainly.com/question/1593748
#SPJ2
1. Infer a quantitative measurement that can be made from the scene shown. Be sure to use at least ONE COMPLETE
CONTENT RELATED SENTENCE. (ref: 13)
2. Explain the difference between mass and weight. Be sure to use at least TWO COMPLETE CONTENT RELATED
SENTENCES. (ref: 9).
Answer:
Explanation:
One quantitative measurement that can be made from the above diagram is the length of the ruler. The ruler is an instrument used to measure short distances in the order of centimeters. Longer distances can be measured using a tape rule.
Mass is the amount of matter a substance contains. Weight is a function of mass and gravity on a body. When the mass of a body is recorded, it is the same everywhere in the universe. Weight on the other hand varies as gravity changes.
Answer:
The pencil measures approximately 5.5 units and mass is the amount of matter contained in a body and weight is the action that exerts the force of gravity on the body.
Explanation:
A quantitative measure that can be made from the scene shown is the length of the pencil because to measure it quantitatively we have a rule. The pencil measures approximately 5.5 units in length.
Mass is the amount of matter contained in a body and weight is the action that exerts the force of gravity on the body. The mass of an object will remain constant regardless of where it is measured, while the weight of the object will vary according to the force of gravity acting on it, which is different from the place on earth where the measurement is made.
Have a nice day!
When a beaker of water is heated over a Bunsen burner, the volume increases slightly. What is the most likely reason for the small increase in volume?
A
The water molecules are getting smaller.
B
The water molecules are getting bigger.
C
The water molecules are moving faster.
D
The water molecules are moving slower.
Answer:
most likely c
Explanation:
the volume is increased by the quickly moving water particles
Answer: Option C
Explanation:
The molecules has kinetic energy and potential energy both. When the water molecules were heated on a Bunsen Burner then there can be a slight increase in the volume of the water.
This is because upon heating the kinetic energy of the molecules increases and it starts moving fastly.
Due to the movement of the particles, they become far from each other and there is a slight increase in the volume of the water.
1. What is the atmospheric layer responsible for long-distance radio communication?
Question 1 options:
Troposphere
Stratosphere
Exosphere
Thermosphere
In the photosynthesis equation, what does the subscript number mean?
Question 2 options:
Number of molecules
Number of protons
Number of electrons
Number of atoms
The equation for photosynthesis is: 6H2O + 6 CO2 --> C6H12O6 + 6O2 The numerals in each part of the equation (without balancing it) mean: H2 = 2 atoms of Hydrogen O = 1 atom of Oxygen } H2O=water C = 1 atom of Carbon O2 = 2 atoms of Oxygen } CO2= Carbon Dioxide C6 = 6 atoms of Carbon H12 = 12 atoms of Hydrogen O6= 6 atoms of Oxygen } C6H12O6 } Glucose O2 = 2 atoms of Oxygen } O2 = Oxygen When balanced: 6H2O = 6 molecules of water 6CO2 = 6 molecules of Carbon dioxide C6H12O6 = Glucose 6O2 = 6 molecules of Oxygen.
Answer:
The correct answer is "Number of atoms"
Explanation:
Photosynthesis is a unique metabolic process carried out by certain cells of those autotrophic organisms capable of elaborating their own organic matter with inorganic substances by using the energy provided by sunlight. In other words, photosynthesis is the process by which plants make their own food. For that, they need air, sun, light and water and thus, they can live and develop.
The general chemical reaction for photosynthesis is 6 moles of carbon dioxide (CO₂) and 6 moles of water (H₂O), with the addition of solar energy. This produces 1 mole of glucose (C₆H₁₂O₆) and 6 moles of oxygen (O₂). That is, the equation is represented as:
6 H₂O + 6 CO₂ --> C₆H₁₂O₆ + 6 O₂
The letters represent elements present in the species that reacts or is produced. The numbers that appear as subscripts indicate the number of atoms of the element immediately before the subscript that appear in each species and, if no subscript appears, it indicates that an atom is present.
So, the correct answer is "Number of atoms"
what is a massive plasma ball
Answer: A plasma ball — also sometimes called a plasma globe, lamp, dome, or sphere — is a clear glass ball filled with a mixture of noble gases with a high-voltage electrode at its center.
Explanation:
a massive plasma ball is a one of those random things that you find at walmart lol. when you put ur hand on it it looks like little lightning strikes are touching ur hand
Someone help wasn’t in school left early
Answer:
Explanation:
10.is false
11. is volcanism
12.true
13.c
14. From the deepest ocean trench to the tallest mountain, plate tectonics explains the features and movement of Earth's surface in the present and the past. Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core
I’m stuck and 9310 is not the answer. I think it needs to be converted into a decimal between 1-10 please help.
Answer:
.0931 is the answer
Explanation:
you need the equations to be equal, so basically you need both of them to add up to 9310 since 9.31 x 10^3 = 9310.
In order to do this you need to move the decimal point on 9.31 to the left by 2, which is .0931.
.0931 x 10^5 = 9310
Answer:
0.0931
Explanation: since 9.31*10^3=9310 and since division is the opposite of multiplication then if you divide 9310 by 10^5 you get 0.0931
what is the mass in grams of 0.0135 mol of the element sodium,Na?
Answer:
Mass of sodium is 0.1305 g.
Explanation:
Given data:
Number of moles of sodium = 0.0135 mol
Molar mass of sodium = 23 g /mol
Mass of sodium = ?
Solution:
Formula:
Number moles = mass / molar mass
Mass = number of moles × molar mass
Mass = 0.0135 mol × 23 g/mol
Mass = 0.3105 g
Final answer:
The mass of 0.0135 mol of sodium (Na) is 0.310 g.
Explanation:
The mass in grams of 0.0135 mol of the element sodium (Na) can be calculated using the molar mass of sodium. The molar mass of sodium is 22.99 g/mol. To calculate the mass, you multiply the number of moles by the molar mass:
Mass (g) = Number of moles x Molar mass
So, the mass of 0.0135 mol of sodium is:
Mass (g) = 0.0135 mol x 22.99 g/mol = 0.310 g
Please answer as soon as possible
Which term a property of a mineral?
A- reflections
B- Sharpness
C- Composed of carbon
D- Streak
What is the formula for C2H6?
The formula for C2H6 is CH3-CH3.
Explanation:
The given formula C2H6 is the molecular formula depicting the integral number of atoms of combining elements. From this formula, it can confirmed that 2 atoms of carbon has combined with 6 atoms of hydrogen, but the arrangement of these atoms and the bonding between them is unclear from the given formula.
In order to determine the bonding occurring between elements and how the atoms are arranged or bonded with each other, we use structural formula representation. It is known that a single carbon atom that should have four bonds to attain the stable state and each hydrogen atom can share only one electron.
So the structural formula of C2H6 can be written as CH3-CH3. This indicates that three hydrogen atoms will be bonded with a single carbon atom leading to formation of single bond between two carbon atoms surrounded by three hydrogen atoms on either sides of carbon atoms. This material is termed as ethane and it falls in alkalies group of organic compounds.
Answer:
The general Formula given for alkanes is [tex]CnH2n+2[/tex] and hence it shows [tex]C_2 H_6[/tex] is the second alkane and is named ethane.
Explanation:
Formula here shows two molecules of [tex]CH_3[/tex] are joined that is the formula for Ethane becomes [tex]CH_3-CH_3[/tex].
If we break the name ethane it gives two divisions eth and ane the former means to while the latter represents the alkane family. Hence the formula represents two carbons in alkane family which makes it [tex]C_2H_6[/tex].
Most carbon compounds are formed by exchanging electrons with carbon.
True
False
Answer:
Most carbon compounds are formed by exchanging electrons with carbon. True
Suppose that you found a gold coin in your backyard and you wanted to determine
its value. You knew that gold was selling for $323.12 per ounce. You bring it to
lab and you weigh it. But the lab scale gives you the weight in grams. What is the
value of the coin if the weight was 8.7739 g? Use conversion factors on page 21.
8.7739 g
Answer:
$99.99
Explanation:
Given parameters:
Cost of gold per ounce = $323.12
weight of gold in the lab = 8.7739g
Solution
We need to first convert the mass of the weighed gold into ounces from grams:
1 gram = 0.03527oz
8.7739g = 8.7739 x 0.03527; 0.31oz
Since 1oz of gold is $323.12
0.31oz of gold will be 0.31 x 323.12 = $99.99
A solution of NaCl has a concentration of 1.50 M. The density of the solution is 1.06 g/mL. What is the concentration solution by percent in mass?
Answer:
The concentration solution by percent in mass is 8.28%
Explanation:
Molarity is moles of solute present in 1L of its solution .
Hence the formula is
[tex]$\left.\text {Molarity}=\frac{\text {moles of solute}}{\text {Volume of solution in } L} \text { (unit is } \frac{\text { mol }}{L} \text { or } M\right)=\frac{1.50 \mathrm{mol}}{1 \mathrm{L}}$[/tex]
Let us convert the numerator and the denominator into mass in g
Numerator :
[tex]mass $=$ moles $\times$ molar mass\\\\$=1.50 \mathrm{mol} \times 58.5 \frac{g}{\text { mol }}=87.75 \mathrm{g}$ (solute)[/tex]
Denominator :
[tex]$\begin{aligned} \text {mass} &=\text { density } \times \text {volume}=\frac{1.06 \mathrm{g}}{1 \mathrm{ml}} \times 1 \mathrm{L} \\\\ &=\frac{1.06 \mathrm{g}}{1 \mathrm{ml}} \times 1000 \mathrm{ml}=1060 \mathrm{g} \end{aligned}$[/tex]
The formula to find mass percentage is
[tex]$\%$ mass $=\frac{\text { mass of solute }}{\text { mass of solution }} \times 100 \%$[/tex]
[tex]$\%$ mass of $\mathrm{NaCl}=\frac{\text { mass of solute }}{\text { mass of solution }} \times 100 \%$[/tex]
[tex]$=\frac{87.75 g}{1060 g} \times 100 \%$\\[/tex]
=8.28% (Answer)
Answer:
8.27% on edge
Explanation:
A plant species has two possible gene variations for seed shape. One plant has smooth seeds, and another has wrinkled seeds.There is a no chance that their offspring will be born with wrinkled seeds. What can u conclude from this information
Answer: Genes
Explanation: Both plants are heterozygous for smooth seeds making it a dominant trait.
which statement about schrodingers theory of the atomic model is true?
I found the complete question:
Which statement about schrodingers theory of the atomic model is true?
A. it proved that the nucleus of an atom is positively charged.
B. it was the first theory to discuss the existence of electrons.
C. it explained the odds of finding the position of an electron.
D. it assumed the electron cloud to be heavier than the nucleus.
Answer:
C. it explained the odds of finding the position of an electron.
Explanation:
Erwin Schrodinger formulated the wave equation of electrons. His wave equation highlighted the probability of where an electron can be found or located in an energy level.
The region of maximum probability of where an electron is located is referred to as an electron cloud or an orbital.
Answer:
c
Explanation:
A 10.0cm3 volume of alcohol has a mass of 7.05g. What the density
A 10.0cm3 volume of alcohol has a mass of 7.05g. [tex]0.705 \frac{g}{c m^{3}}[/tex] is the density
Answer: [tex]0.705 \frac{g}{c m^{3}}[/tex]
Explanation:
The ratio between the mass of a substance and its unit volume is referred as density.
[tex]\text {Density}=\frac{\text { mass }}{\text { volume }}=\frac{7.05 g}{10.0 \mathrm{cm}^{3}}=0.705 \frac{g}{\mathrm{cm}^{3}}[/tex] is the Answer
Note:
1000 g = 1 kg
100 cm = 1 m
When we used to transform the given values into S.I units, then
[tex]\text {Density}\left(\frac{k g}{m^{3}}\right)=\frac{\text {Mass}(k g)}{\text {Volume}\left(m^{3}\right)}[/tex]
Alcohol’s volume can be written as, [tex]10.0 c m^{3} = 10 \times 10^{-2} m^{3}[/tex]
Alcohol’s mass can denote as, [tex]7.05 g = 7.05 \times 10^{-3} \mathrm{kg}[/tex]
Then, [tex]\text { Density }\left(\frac{k g}{m^{8}}\right)=\frac{, 00705(k g)}{0.1\left(m^{3}\right)} = .0705 \frac{\mathrm{kg}}{\mathrm{m}^{\mathrm{s}}}[/tex]
Can’t seem to sort them out into their correct spots. Can anyone help?
Here's a few connections I can make for you:
The cell membrane is what contains everything in the cell. Akin to the skin on humans.
The cytoplasm contains all the cell substances outside of the nucleus.
The nucleus is the control center of the cell. Inside, are the chromosomes which store DNA. The nucleus is surrounded by the nuclear membrane.
The mitochondria is the powerhouse of the cell. It produces energy also known as ATP.
Ribosomes are found attached to the endoplasmic reticulum. Ribosomes are responsible for protein synthesis.
How many atoms are in 3.64 mol of pure aluminum?
Total, approximately 2.19 x 10²⁴ atoms in 3.64 mol of pure aluminum.
To determine the number of atoms in a given amount of substance, you can use Avogadro's constant (6.022 x 10²³ atoms/mol). This constant will represents the number of atoms, ions, or the molecules in one mole of the substance.
Given:
Amount of aluminum (Al) = 3.64 mol
Avogadro's constant = 6.022 x 10²³ atoms/mol
Number of atoms = Amount of substance (in mol) × Avogadro's constant
Number of atoms = 3.64 mol × (6.022 x 10²³ atoms/mol)
Number of atoms ≈ 2.19 x 10²⁴ atoms
Therefore, there are approximately 2.19 x 10²⁴ atoms in 3.64 mol of pure aluminum.
To know more about pure aluminum here
https://brainly.com/question/10934154
#SPJ3
Convert 3.5 L into gallons
And ml
Answer:
0.924602
Explanation:
Answer:
Explanation:
3.5 l = .9246 gal
3.5 l = 3500 ml
3.5 ml = .0009246