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malfutka [58]
3 years ago
11

Convert 99.0 g Se to moles Se.

Chemistry
1 answer:
Elenna [48]3 years ago
7 0

Answer:

About 1.254 moles

Explanation:

The first step is to find the molar mass of selenium. If you take a look at a periodic table, you will find that there is a little number underneath that says something around 78.96 g/mol. Dividing 99 grams by this number, you get about 1.254 moles of Se. Hope this helps!

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Under what conditions will deviations from the "ideal" gas be expected?
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Answer:

Conditions which results in deviating a gas from "ideal" behavior are

1. Low Temperature

2. High Temperature

Explanation:

Ideal gas according to the kinetic model theory states that the conditions that apply are high temperatures where kinetic energy and low pressure is too high and the interactions in between and the container are negligible. Hence, the deviations of ideal gas falls when there is low temperature and high pressure.

3 0
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The density of an element is 19.3 g/cm^3. What is its density in kg/m^3?
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4 years ago
How efficient are electric engines
raketka [301]

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4 years ago
2NO + 2H2 ⟶N2 + 2H2O What would the rate law be if the mechanism for this reaction were: 2NO + H2 ⟶N2 + H2O2 (slow) H2O2 + H2 ⟶2
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Answer:

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Explanation:

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