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4 years ago

How does the water cycle ensure that we have water

1 answer:

8 0

The water cycle does not ensure that we have water. We must HAVE water to cause water cycle.

Evaporation, then condensation, and finally precipitation.
This would happen in order.

Hope this helps!

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If 78.2 grams of carbonic acid are sealed in a 2.00 L soda bottle at room temperature (298 K) and decompose completely via the e

Luden [163]

Answer: The final pressure of carbon dioxide is 15.4 atm

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

For carbonic acid:

Given mass of carbonic acid = 78.2 g

Molar mass of carbonic acid = 62 g/mol

Putting values in above equation, we get:

$\text{Moles of carbonic acid}=\frac{78.2g}{62g/mol}=1.26mol$

For the given chemical reaction:

$H_2CO_3(aq.)\rightarrow H_2O(l)+CO_2(g)$

By Stoichiometry of the reaction:

1 mole of carbonic acid produces 1 mole of carbon dioxide

So, 1.26 moles of carbonic acid will produce = $\frac{1}{1}\times 1.26=1.26mol$ of carbon dioxide

To calculate the pressure, we use the equation given by ideal gas, which follows:

$PV=nRT$

where,

P = pressure of the carbon dioxide = ?

V = Volume of the container = 2.00 L

T = Temperature of the container = 298 K

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of carbon dioxide = 1.26 moles

Putting values in above equation, we get:

$P\times 2.00L=1.26mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 298K\\\\P=\frac{1.26\times 0.0821\times 298}{2.00}=15.4atm$

Hence, the final pressure of carbon dioxide is 15.4 atm

6 0

3 years ago

Which chemical formula represents the hydroxide ion? H+ H3O+ H2O OH-

Sophie [7]

OH- is the hydroxide ion

5 0

3 years ago

Read 2 more answers

If the temperature outside is 297 what is this temperature in degrees celsius

yawa3891 [41]

Answer:

147.222

Explanation:

It's a simple conversion.

7 0

4 years ago

What element is undergoing oxidation in the following reaction?. . CH4(g) +2O2 (g) -> CO2(g) +2H2O(g). . . option . a) C. b)

SVETLANKA909090 [29]

The correct answer is a.) C. Oxidation occurs when an element loses electrons and increases its oxidation state. In the chemical equation, Carbon in CH4 has an oxidation state of 4- while Carbon in CO2 has an oxidation of 4+.

4 0

3 years ago

Read 2 more answers

A scientist is adding oxygen to iron in a chemical reaction to create rust. At what point during

Shalnov [3]

Answer: What type of chemical reaction is rusting of iron?

Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3. Water is necessary for the oxidation reaction to occur and to facilitate transport of the electrons.

4 0

3 years ago