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3 years ago

In the reaction 2H2(g) + O2(g) ® 2H2O(g), what is the volume ratio of H2 to H2O?

1 answer:

3 0

By looking at the stochiometry, we can conclude that the ratio is 1 :1

2 moles of H2 react to form 2 moles of H2O

hope this helps

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N2O5(g) → NO3(g) + NO2(g)

sammy [17]

Answer:

It will take 77.8 seconds for 95% of sample to react

Explanation:

As the given reaction obeys 1st order therefore-

$[N_{2}O_{5}]=[N_{2}O_{5}]_{0}\times (\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$

Where $[N_{2}O_{5}]$ is the concentration of $N_{2}O_{5}$ after "t" time, $[N_{2}O_{5}]_{0}$ is the initial concentration of $N_{2}O_{5}$ and $t_{\frac{1}{2}}$ is half life

Here, $\frac{[N_{2}O_{5}]}{[N_{2}O_{5}]_{0}}=\frac{100-95}{100}=0.05$ and $t_{\frac{1}{2}}=18.0 seconds$

So, $0.05=(\frac{1}{2})^{\frac{t}{18.0seconds}}$

or, $t=77.8 seconds$

So, it will take 77.8 seconds for 95% of sample to react

7 0

3 years ago

Why do two isotopes of an element have the same atomic number but different mass numbers?

Arte-miy333 [17]

Well to put simple. Isotopes have a different relative amount of neutrons . the more neutrons the more it weighs BUT it still is the same element

7 0

3 years ago

Convert 30°C into kelvin

lakkis [162]

Answer:303.15

Explanation:

4 0

3 years ago

The different combinations that genes within a population can have is known as

podryga [215]

Answer:

genetic variation

Explanation:

it just is

7 0

3 years ago

A chemist determines by measurements that moles of nitrogen gas participate in a chemical reaction. Calculate the mass of nitrog

Likurg_2 [28]

Answer:

0.56 g

Explanation:

<em>A chemist determines by measurements that 0.020 moles of nitrogen gas participate in a chemical reaction. Calculate the mass of nitrogen gas that participates.</em>

Step 1: Given data

Moles of nitrogen gas (n): 0.020 mol

Step 2: Calculate the molar mass (M) of nitrogen gas

Molecular nitrogen is a gas formed by diatomic molecules, whose chemical formula is N₂. Its molar mass is:

M(N₂) = 2 × M(N) = 2 × 14.01 g/mol = 28.02 g/mol

Step 3: Calculate the mass (m) corresponding to 0 0.020 moles of nitrogen gas

We will use the following expression.

m = n × M

m = 0.020 mol × 28.02 g/mol

m = 0.56 g

4 0

3 years ago