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TiliK225 [7]
4 years ago
8

When given a compound, adding up all of the _______ of all of the individual atoms within one molecule of a compound will determ

ine the molecular mass.
Chemistry
2 answers:
andreev551 [17]4 years ago
7 0
The answer is adding up the protons of each individual atom will give you its atomic mass.
RSB [31]4 years ago
3 0

Answer is: atomic masses.

For example, calculate molecular mass of one mole of ethanol (C₂H₅OH). Molecule of ethanol has two carbon atoms, six hydrogen atoms and one oxygen atom:

M(C₂H₅OH) = 2Ar(C) + 6Ar(H) + Ar(O) · g/mol.

M(C₂H₅OH) = 2·12 + 6·1 + 16 · g/mol.

M(C₂H₅OH) = 46 g/mol; molar mass.

Atomic mass is approximately equivalent to the number of protons and neutrons in the atom.

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Assume that a raindrop has a volume of 3.48 cm3. If you had an Avogadro’s number of raindrops that just filled a cubic box. What
N76 [4]
Answer is: <span>edge of the length of the box measured is 1280,57 kilometers.
</span>V(raindrop) = 3,48 cm³.
V(cubic box) = 3,48 cm³ · 6,023·10²³.
V(cubic box) = 2,1·10²⁴ cm³.
V(cubic box) = 2,1·10²⁴ cm³ ÷ 10¹⁵.
V(cubic box) = 2,1·10⁹ km³.
r(cubic box) = ∛2,1·10⁹ km³.
r(cubic box) = 1280,57 km.
6 0
3 years ago
Why is specific activity used as a measurement of enzyme purity, but the turnover number cannot be used for this purpose?
Lelechka [254]

Answer:

See explanation

Explanation:

Specific activity of an enzyme is defined as a measure of the rate of reaction between enzyme and substrate.

In the study of enzyme kinetics, specific activity is particularly regarded to be the amount of substrate converted by the enzyme per milligram of protein per unit of time. It is thus a reliable measure of enzyme activity per milligram of total protein.

On the other hand, the turnover number is defined as a measure of the number of conversions achieved by a substrate molecule in one second at a particular active site depending on the specific enzyme concentration.

Since specific activityof the enzyme is the ratio of the enzyme activity to enzyme concentration, then specific activity can be used as a measurement of enzyme purity.

4 0
3 years ago
Calculate the number of copper atoms in 2.45 mole of copper
nikdorinn [45]

Answer:

1.48×10²⁴ Cu atoms

Explanation:

For this question you need to use Avogadro's number 6.022×10²³atoms.

2.45 moles of Cu ×\frac{6.022x10x^{23} atoms }{1 mole}= 1.47539×10²⁴ atoms.

The moles cancel out so you are left with atoms.

Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.

3 0
2 years ago
Help. Please! Help for 6-13
Lynna [10]
8. Transition metals
9. Halogens
10. Nobel gasses
11. Lanthanides
12. Actinides
13. The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.
7 0
3 years ago
A graduated cylinder is filled with 54.32 cm3 of water. An irregular solid made of iron is carefully placed into the graduated c
NeTakaya

Answer:

<h3>The answer is 26.22 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

density of iron = 7.874 g/cm³

volume = final volume of water - initial volume of water

volume = 57.65 - 54.32 = 3.33 mL

We have

mass = 7.874 × 3.33 = 26.22042

We have the final answer as

<h3>26.22 g</h3>

Hope this helps you

3 0
3 years ago
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