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harkovskaia [24]
3 years ago
5

How many atoms are in 0.625 moles of ge (atomic mass = 72.59 amu)?

Chemistry
2 answers:
lord [1]3 years ago
8 0
0.625 moles of ge X 6.02x10^23 atoms/ 1 mol of ge equal to 3.76x10^23 atoms of ge, just times with Avogadro.
Vikki [24]3 years ago
8 0

Answer:

3.76 × 10²³ atoms

Explanation:

1 mole = 6.022 × 10²³ atoms (Avogadro's number)

Therefore, 0.625 moles of Ge will have:

Multiply the given moles by number of atoms per mole.

= 0.625 moles ×6.022 × 10²³ atoms/mol

= 3.76 × 10²³ atoms

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Answer:

e. 3

Explanation:

In order to solve this problem we need to keep in mind the definition of pH:

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As stated by the problem, the hydrogen ion concentration, [H⁺], is 1x10⁻³ M.

As all required information is available, we now can <u>calculate the pH</u>:

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At what temp will a gas be at if you allow it to expand from an original 456 mL to 65°C to 3.4 L
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3 years ago
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Give two possible sets of four quantum numbers for the electron in hydrogen when it is in its lowest energy state.
konstantin123 [22]

Answer:

Explanation:

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set of 4 possible quantum numbers

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Spin quantum no  s = + 1/2

set of other quantum nos

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

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Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are C
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Answer:

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Explanation:

  • For balancing a chemical equation, we should apply the law of conversation of mass. It states that the no. of atoms in the reactants side is equal to that of the products side.

So, the balanced equation:

<em>2C₃H₇BO₃ + 8O₂ → 6CO₂ + 7H₂O + B₂O₃.</em>

It is clear that 2.0 moles of C₃H₇BO₃ is completely burned in 8 m oles of oxygen and produce 6 moles of CO₂, 7 moles of H₂O and 1 mole of B₂O₃.

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