Answer:
Qualitative: Physical observations (the sky is blue, the water is boiling, etc.)
Quantitative: Numberical observations (density= 1 g/ml, volume= 14 ft^3, etc.)
Explanation:
The way to remember it is quaLitative is qualities of the object. QuaNtitative is quantities of the object.
Qualitative physical properties describe the quality of matter without numbers, such as color, while quantitative properties involve numbers and units, like a substance's melting point.
Qualitative and quantitative physical properties differ in the way they describe matter. Qualitative physical properties describe the quality of a substance without using numbers. For example, sulfur being yellow is a qualitative description. On the other hand, quantitative physical properties specify the quantity and include numerical values with units, such as a book having 650 pages.
To illustrate these differences, consider the physical property of color. Color is a qualitative property because it describes what we see without measurement. In contrast, melting point is a quantitative property because it provides a specific temperature at which a substance changes from a solid to a liquid, such as ice melting at 0°C.
What portion of the cell provides the energy for mitosis and other functions?
Answer:
The cell that helps provide the energy for mitosis is Process of cell division that results in to identical daughter cells.
How many atoms of silicon are in 1.8mol of silicon?
Answer:
10.836 × 10∧23 atoms
Explanation:
The mole is the unit of amount in chemistry. We know that
1 mole of silicon = 6.02× 10∧23 atoms
The number 6.02× 10∧23 is called Avogadro's number.
Definition:
" Avogadro's number is the number of molecules atoms or ions in one gram molecule of a compound, one gram atom of an element or one gram ions of a substance"
For example:
1 g of hydrogen = 1 mole of hydrogen = 6.02× 10∧23 atoms of hydrogen
18 g of water= 1 mole of water= 6.02× 10∧23 molecules of water
Given data:
moles of sulfur= 1.8 mol
number of atoms= ?
Solution:
one mole of silicon= 6.02 × 10∧23
1.8 × 6.02× 10∧23 = 10.836 × 10∧23 atoms
Explanation:
According to the mole concept there are [tex]6.022 \times 10^{23} atoms[/tex] present in 1 mole of a substance.
Mathematically, 1 mole = [tex]6.022 \times 10^{23}[/tex] atoms or molecules
Therefore, number of atoms of silicon present in 1.8 mol of silicon are as follows.
[tex]1.8 mol \times 6.022 \times 10^{23}}atoms /mol[/tex]
= [tex]10.83 \times 10^{23}[/tex] atoms
Thus, we can conclude that there are [tex]10.83 \times 10^{23}[/tex] atoms of silicon are present in 1.8 mol of silicon.
Deduce the formula of the ion that has a charge of 2+ with the same electron configuration as krypton.
Answer:
Sr²⁺
Explanation:
Krypton has 36 electrons and an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6. An ion with a charge of 2+ and 36 electrons is Sr²⁺. Since it has the same amount of electrons, Sr²⁺ also has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.
The formula of the ion is Sr²⁺
From the periodic table, we understood that Krypton (Kr) has 36 electrons.
From the question given above, we were told that the ion has the same electronic configuration as krypton. Thus,
The ion also have 36 electrons.
Finally, we shall determine the number of protons in the ion in order to determine the element that form the ion and also the symbol of the element.
Electrons in the ion = 36
Charge on ion = +2
Protons in the ion =?Charge = Proton – Electron2 = Proton – 36
Collect like terms
Proton = 2 + 36
Proton = 38Considering the period table, the element with 38 protons (i.e atomic number of 38) is strontium with symbol Sr.
Therefore, the formula of the ion with the same electron configuration as krypton is Sr²⁺
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According to the Law of Conservation of Mass, the number of iron atoms needed to complete the following reaction is ___ Fe + 3O2 → 2Fe2O3
Answer:
is 4
Explanation:
Fe + 3O₂ → 2Fe₂O₃
The law of conservation of mass states that "matter is neither created or destroyed in a system". Now, by careful inspection of the atoms reacting and the product formed, we see that the equation is not balanced.
Fe on reactant side is 1 but 4 on the product side. To balance it up, we simply put 4 as the coefficient behind the iron atoms.
4Fe + 3O₂ → 2Fe₂O₃
Answer:
4
Explanation:
TRUST ME
Convert 23 in2 to the equivalent number of cm2. Start with the given facts that 12 in = 1 ft and 1 in = 2.54 cm
Please show your work in your answer here. Do not simply google the answer using a unit converter.
Answer:
We are giving that 12 inches make one foot and 1 inch is equivalent to [tex]2.54 cm.[/tex]
Of the given inches in centimetre will be [tex]148. 38 cm^2.[/tex]
Explanation:
Now the value that is given in inches square is 23, to calculate the value of inches given in the question into centimetre we have to multiply the value of inch with [tex]2.54 cm.[/tex]
[tex]23 \times 2.54 \times 2.54= 148.38 cm^2[/tex]
Since the value is given in square hence the centimetre calculated would also be in square that is why [tex]2.54[/tex] needs to be multiplied twice.
Final answer:
To convert 23 in2 to cm2, divide by 144 (to convert to square feet) and then multiply by the conversion factor for square feet to square centimeters.
Explanation:
To convert 23 in2 to cm2, we need to use the given conversion factor of 1 in = 2.54 cm. First, let's convert the square inches to square feet by dividing by 144 (since there are 12 inches in a foot). So, 23 in2 = 23/144 ft2. Next, convert the square feet to square centimeters by multiplying by the conversion factor of 1 ft2 = 929.0304 cm2. Therefore, 23 in2 is equal to (23/144) * 929.0304 cm2 = 18.64162 cm2 (rounded to five decimal places).
A 10.0cm3 volume of alcohol has a mass of 7.05g. What is the density of the alcohol in grams per cubic centimeter
Answer:
0.705 g/cm³
Explanation:
Step 1: define density
The (volumetric mass) density of a sample or substance, is this sample or substance its mass per unit volume and can be defined through following formula:
ρ = m/v
with ρ = density (kg/m³)
m = mass of the substance (kg )
v = volume (m3)
Step 2: change datat SI-units
10.0 cm³ = 10^-5 m³
7.05 g = 0.00705 kg
ρ = 0.00705 kg / 10^-5 m³ = 705 kg / m³
To convert this to g/cm³ we have to divide by 1000
ρ = 0.705 g/cm³
To control this we calculate 7.05g / 10cm³ = 0.705 g/cm³
The desnity of the alcohol is 0.705 g/cm³
Convert: 65 kg to mg
65,000 mg
O 65,000,000 mg
O 65 mg
Answer:
kg, mg. 65.00, 65,000,000. 65.01, 65,010,000. 65.02, 65,020,000. 65.03, 65,030,000. 65.04, 65,040,000. 65.05, 65,050,000. 65.06, 65,060,000.
Explanation:
An atom of a chlorine has an atomic number of 17and a mass number of 37 how many protons neutrons and electrons are in a atom???? Need help!!!!
Answer:
number of protons =17
number of neutrons=20
number of electrons=17
Atomic number is the same as proton number
To find the neutrons
subtract the atomic number from the mass number
thus, Neutrons =Mass number - Atomic number
Neutrons=37-17
Neutrons=20
An atom of a chlorine has an atomic number of 17and a mass number of 37 . The number of protons =17 ; number of neutrons=20; number of electrons=17
The Atomic number of an element is the same as proton number
And, To find the number of neutrons we need to subtract the atomic number from the mass number
given,
atomic number =17
mass number= 37
thus, Number of Neutrons =Mass number - Atomic number
Number of Neutrons=37-17
number of Neutrons=20
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A neutral atom with 6 electrons and 8 neutrons is an isotope of
Answer:
It's an isotope of carbon
Explanation:
Isotopes have the same number of protons and electrons but a different number of neutrons.
Carbon, like we find it on the periodic table, has 6 electrons and protons and also 6 neutrons. ( Carbon has a standard molecular weight of 12: 6electrons + 6 neutrons)
This isotope has 6 electrons but 8 neutrons, so this represents Carbon-14. Which is an isotope of carbon.
The atom with 6 protons or electrons is Carbon. However, the mention of 8 neutrons indicates this is an isotope of Carbon, specifically Carbon-14.
Explanation:A neutral atom with 6 electrons would also contain 6 protons, as the number of protons and electrons in a neutral atom are equal. The element with 6 protons is Carbon, but the presence of 8 neutrons, not 6 (that is associated with Carbon-12), indicates this is an isotope of Carbon, specifically Carbon-14. It's important to note that isotopes are variations of an element that have different numbers of neutrons.
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Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B Mass ratio A/B =
Answer:
mass ratio of A/B is 2:1
Explanation:
Since the mass of box A = 10g
mass of box B = 5g
Mass of box C = mass of box A + mass of box
A ratio compares two quantities. To find the ratio of the two boxes:
Ratio of A to B = [tex]\frac{mass of A}{mass of B}[/tex]
Ratio of A to B = [tex]\frac{10grams}{5grams}[/tex] = 2
The mass ratio is 2:1 i.e box A has twice the mass of B
Answer:
15?
Explanation:
Cause 10+5 is 15 and that’s all I have
Explain dissolving, and express how boiling can reverse the process in the example of salt water
Answer:
Explanation:
Dissolving is when a soluble solute is added to a solvent. The solvent surrounds the solutes and makes a solution of it. The process of dissolving is known as dissolution. For a substance to be able to dissolve in a solvent, they must both have similar properties. It is generally known that like dissolves like. Polar solvents will dissolve polar solutes and vice versa.
Boiling can reverse dissolution process in that, the solvent can reach its boiling point and it wil begin to give out vapours. As more vapours are release, the solutes begin to aggregate and form back.
Gold has a latent heat fusion of 64.5 J/g. How much energy is required to melt 20.0 g of gold?
Answer:
The amount of heat require to melt the gold is 1290 J.
Explanation:
Formula:
Q = m × Lf
Q = heat required to melt the substance
m = mass of given substance
Lf = Latent heat of fusion
Given data:
Lf = 64.5 j/g
m = 20 g
Q = ?
Now we will put the values in formula.
Q = m × Lf
Q = 20 g × 64.5 j/g
Q = 1290 J
The amount of heat require to melt the gold is 1290 J.
Answer:
The amount of heat require to melt the gold is 1290 J.
Explanation:
Why is data important to scientific endeavor?
A- Data is the information that supports or does not support a hypothesis.
B-Data is the information that proves all hypotheses are correct.
C-Data is the information that proves whether or not a scientist is biased.
D-Data is necessary to form a hypothesis.
Answer:
b. data is the information that proves all hypotheses are correct
Explanation:
Data is important to scientific endeavors as it is the information which supports or does not support a certain hypothesis someone has about a certain theory, data will generate further ways to support that theory or oppose it, in both cases the basic resource which a scientific endeavor needs is data
There are _________ pennies in 1.500 moles of pennies? (for scientific notation, use the ^ symbol similar to 2.02 x 10^5)
Answer:
9.03 x 10²³ atoms in the pennies
Explanation:
I suspect you want to find the number of atoms that makes up the given moles of the pennies:
Number of moles of pennies = 1.5 moles
Solution:
The mole can be defined as the amount of a substance that contains Avogadro's number of particles i.e 6.02 x 10²³atoms.
number of atoms = number of moles x 6.02 x 10²³ = 1.5 x 6.02 x 10²³
number of atoms = 9.03 x 10²³ atoms
Writing the Chemical Formula of a Covalent Compound
Phosphorus trichloride is used in the production of chemicals that keep plants from growing in a specific area. This
compound is made of one phosphorus atom represented by the chemical symbol P and three chlorine atoms
represented by the chemical symbol Cl.
What is the chemical formula of this compound?
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PC13
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1P3C1
Intro
Done
Answer:
PCl₃
Explanation:
If a molecule contains one P atom and three Cl atoms, its formula must be PCl₃.
A is wrong, because the formula PCl means one atom of P and one of Cl.
C and D are wrong, because the formula P₃Cl indicates a molecule consisting of three P atoms and one Cl atom.
Answer:
PCl sub-3
Explanation:
just checked!!!
how many milliliters are in 0.063 L?
To convert 0.063 liters into milliliters, 0.063 will be multiplied by 1000 which will give 63 milliliters.
The question asks how many milliliters are in 0.063 liters. To convert liters to milliliters, we use the conversion factor that 1 liter is equal to 1000 milliliters. Since we are converting from a larger unit (liters) to a smaller unit (milliliters), we need to multiply.
To find the answer, we multiply 0.063 liters by 1000 milliliters/liter:
0.063 L × 1000 mL/L = 63 mLTherefore, 0.063 liters is equal to 63 milliliters.
A student mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations?
A:The two liquids are toxic and should be handled with extreme caution.
B:The two liquids were pure substances before they were mixed.
C:The two liquids have been stored too long and are no longer good.
D:The two liquids have gone through a chemical change in which a new substance called a precipitate was produced.
Answer:
D
Explanation:
Answer:
The correct answer is D; the new substance produced is a precipitate.
Explanation:
Essentially what happened was the two liquids could not mix (insolubility), so a white powder settled at the bottom, which is called a precipitate (residue). This is evidence of chemical change and chemical reaction.
TRUE OR FALSE????
The name for the formula MgI2 is magnesium diiodide.
Answer:
yes that is the name for the formula is magnesium diiodide
False, The formula MgI₂ is correctly named magnesium iodide, not magnesium diiodide. The naming convention for ionic compounds doesn't require prefixes when the simplest ratio of ions is used in the name.
The statement that the name for the formula MgI₂ is magnesium diiodide is FALSE. The correct name for MgI₂ is magnesium iodide. The naming convention for binary ionic compounds involves combining the cation name with the anion name.
Since the magnesium ion has a charge of +2 (Mg²⁺) and each iodide anion has a charge of -1 (I-), two iodide ions are needed to balance the charge of one magnesium ion. However, the prefix 'di' is not necessary in this case because the convention is to use the simplest ratio of ions which is assumed in the name. Thus, for MgI₂, we simply say magnesium iodide.
Turning to other examples to explain how the nomenclature works for binary ionic compounds, magnesium oxide has the formula MgO, which tells us there is a 1:1 ratio of magnesium ions to oxide ions. Similarly, MgCl₂ is called magnesium chloride, indicating there are two chloride ions for every one magnesium ion to balance the charges, resulting in no prefixes being used in the name.
If 3.5 g of element X reacts with 10.5 g of element Y to form the compound XY.
what is the percent by mass of element X in the compound? The percent by mass
of element Y?
Answer:
The percentage by mass of element X is 25 %.
The percentage by mass of element Y is 75 %
Explanation:
X + Y ⇒ XY
3.5 g of element X + 10.5 g of element Y = 14g in total
⇒Element X : 3.5g / 14g = 0.25 ⇒ x 100 % = 25 %
⇒Element Y : 10.5 / 14 = 0.75 ⇒ x 100 % = 75 %
The percentage by mass of element X is 25 %.
The percentage by mass of element Y is 75 %
The percent by mass of X in the compound is 25%, and the percent by mass of Y in the compound is 75%.
Explanation:The total mass of the compound formed by elements X and Y is the sum of the masses of X and Y, which is 3.5 g + 10.5 g = 14 g. The percent by mass of an element in a compound is calculated by taking the mass of the element and dividing it by the total mass of the compound, then multiplying by 100% to convert the decimal to a percent.
So, the percent by mass of X is (3.5 g / 14 g) × 100% = 25%. The percent by mass of Y is (10.5 g / 14 g) × 100% = 75%.
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PLEASE ANSWER FAST
A scientist had two substances. One was a yellow liquid and the other was a colorless liquid. The scientist added a few drops of the yellow liquid to the colorless liquid. A red solid formed. What most likely happened when the scientist mixed the two liquids?
A. The two substances stayed the same and no new substances were formed.
B. A new substance with properties identical to the colorless liquid was formed.
C. A new substance with properties identical to the yellow liquid was formed.
D. A new substance with properties different from either of the liquids was formed.
Answer:
D. A new substance with properties different from either of the liquids was formed.
Explanation:
This is a simple chemical reaction. When chemical reactions occur, bonds are simply broken and rearranged and new ones formed. Formation of new compounds can be seen and clearly observed. These compounds are completely different in properties from the atoms and compounds that combines to form them.
If they still share the same property in anyway, then, there was only a physical combination of the compounds and this implies the formation of a mixture
Answer:
D. A new substance with properties different from either of the liquids was formed.
The correct option that is the answer for the question is option d
Explanation:
In the given question two liquids of different colours are mixed together. One of them has yellow colour, while the other is colourless on mixing we see that the new substance that is formed is neither yellow nor colourless.
And the mixture that is formed is a substance which is not liquid and solid of red colour and we can conclude, that the mixture form does not retain any property of the elements from which it is made. Hence we can say a new substance with different properties are formed.
An electron has an uncertainty in its position of 471 pm .
Answer:
[tex]$\Delta x . \Delta p \geq \frac{h}{4 \pi}$[/tex]
∆x is the Uncertainty in the position of the particle
∆p is the Uncertainty in the momentum of the particle
[tex]$\Delta p=\frac{h}{4 \pi \times m \times \Delta x}$[/tex]
[tex]$=\frac{6.626 \times 10^{-34} \mathrm{kgm}^{2} s^{-1}}{4 \times 3.14 \times 9.109 \times 10^{-31} \mathrm{kg} \times 471 \times 10^{-12} \mathrm{m}}$[/tex]
[tex]$=\frac{6.626 \times 10^{-34} \mathrm{ms}^{-1}}{53887 \times 10^{-43}}$[/tex]
[tex]=1.23\times10^5 ms^{-1}[/tex] is the answer
Which statements accurately describe electronic tools? Check all that apply.
Electronic tools collect large amounts of data.
Electronic tools take a long time to record data.
Electronic tools collect data with little precision.
Electronic tools display data quickly and clearly.
Electronic tools provide accurate data analysis.
Electronic tools require lots of space for data storage.
Answer:
Out of all the six options that we are given option one option four and option five would be correct regarding electronic tools.
Electronic tools collect large amounts of data.Electronic tools display data quickly and clearly. Electronic tools provide accurate data analysis.Explanation:
Since electronic tools are made with the purpose of calculation that can be made easier and faster. Hence the option that suggest that electronic tools give the answers quickly and clearly should be correct.
Secondary the option that says electronic tools can have a large amount of data is also true. Because large amount of calculations can be carried out using electronic tools easily. And since the data is clear the data analysis will also be accurate.
Answer:
just summing up what the other person said;
A D and E :)
Explanation:
8) These are the interactions in physical systems that do not appear to be reducible to more basic interactions. They include: gravitational, electromagnetic, strong nuclear, and weak nuclear
Answer:
The fundamental forces or interactions is a term used in physics that explains the Forces that present in nature in their most basic form and cannot be further reduced.
Explanation:
The force of gravitation and the subatomic forces present inside the atom also known as some nuclear reactions and electromagnetic reaction are certain examples of fundamental forces. all these forces are in their basic form of nature.
These all make four such forces while another fifth force is a hypothetical one and is believed to be in existence hypothetically by the scientists.
The data in an experiment come from observing or measuring the
Question 5 options:
A. independent variable
B. control
C. dependent variable
D. experiment
Answer: Dependent variable
Explanation:
The dependent variable in an experiment brings the result of the experiment. The independent variable are the factors that is being controlled by the experimenter.
The dependent variable is basically the aim of the experiment. So, it needs to be measured in order to obtain a result.
The dependent variable is dependent on the independent variable. Hence, to obtain data of the experiment dependent variable is observed.
Which sample of matter is classified as a solution
Answer: Air, sea water, and carbonation dissolved in soda are all examples of homogeneous mixtures, or solutions. Hope this helps :)
Beryllium (Be): 1s 2s
C=
D=
The electronic configuration of Be(beryllium) is [tex]1s^{2} 2s^{2}[/tex], C = 2 and D = 2.
What is electronic configuration?The placement of electrons all around nuclei of a specific atom or molecule would be known as its electronic configuration.
What is Be(beryllium)?The Be atom is a kind of atom which have 4 electrons.
The electronic configuration of Be is [tex]1s^{2} 2s^{2}[/tex]. Therefore, C = 2 and D = 2.
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If a student analyzes data and finds that they got 0.480 moles of an unknown metal and 0.240 moles of oxygen, what is the mole ratio of metal to oxygen?
Answer:
The ratio of the metal to oxygen is 2:1
Explanation:
Given parameters:
Number of moles of unknown metals = 0.48moles
Number of moles of oxygen = 0.24moles
To find the mole ratio:
We divide the given moles by the smallest values. This gives the simplest form of the two elements:
Elements Unkown metal Oxygen
Number of moles 0.48 0.24
simplest form 0.48/0.24 0.24/0.24
2 1
The ratio of the metal to oxygen is 2:1
The mole ratio of an unknown metal to oxygen, given 0.480 moles of the metal and 0.240 moles of oxygen, is 2:1. This ratio was calculated by dividing the number of moles of the metal by the number of moles of oxygen.
Explanation:The mole ratio of metal to oxygen can be determined by dividing the number of moles of each element by each other. In this case, we are given that there are 0.480 moles of an unknown metal and 0.240 moles of oxygen. To find the mole ratio, we divide the moles of the metal by the moles of oxygen:
Mole ratio = moles of metal / moles of oxygen = 0.480 moles / 0.240 moles = 2:1.
This means for every 2 moles of the metal, there is 1 mole of oxygen, which is the required mole ratio of metal to oxygen.
PLSSSS HELP I WILL GIVE BRAINLY Which kind of rock requires heat and pressure to form?
sedimentary rock
clastic rock
metamorphic rock
igneous rock
Answer:
Metamorphic rock is made by a mixture of heat and pressure
Explanation:
How to write 310,763,136 in expanded form
Answer:
Explanation:
"Three hundred ten million, seven hundred sixty-three thousand, one hundred thirty-six".
Answer:"Three hundred ten million, seven hundred sixty-three thousand, one hundred thirty-six".
Explanation:
Which of the following shows examples of things that convert electrical energy to thermal energy? Fan and wind turbine Toaster and room heater Airplane and human body Natural gas stove and blender
Answer:
The answer is the toaster and the room heater.
Explanation:
Both objects are powered by electricity in order to heat things, such as bread and people.
Hope this helps!
Answer:
Option (2)
Explanation:
The process by which one type of energy is transformed into another type is known as the conversion of energy . The changing of electrical energy to thermal energy is an example of energy conversion.
The room heaters are used to heat the room, maintaining a certain room temperature, and a toaster is used to make toasts. Both the room heater and the toaster are the two things from the given options that are used widely and it converts energy, from electrical to thermal energy.
Thus, the correct answer is option (2).