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liq [111]
3 years ago
15

A puddle of water on the sidewalk evaporates and becomes water vapor. the water vapor travels through the air and comes into con

tact with a cold mirror. what happens next? choose all that apply:
1. it becomes a solid
2. it becomes a liquid
3. the molecules gain energy
4. the molecules loose energy
Chemistry
2 answers:
Rina8888 [55]3 years ago
5 0

2 and 4 is correct. I have same question

Shtirlitz [24]3 years ago
3 0
2. it becomes a liquid
4. its molecules lose energy

The change in state is due to the loss of energy.

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formic acid, hcooh, is a weak acid with a ka equal to 1.8×10–4. what is the ph of a 0.0115 m aqueous formic acid solution?
kvasek [131]

The pH of a 0.0115 m aqueous formic acid solution is  mathematically given as

pH=2.8424

This is further explained below.

<h3>What is the ph of a 0.0115 m aqueous formic acid solution?</h3>

Generally,   the equation for the chemical equation is  mathematically given as

HCOOH   H^+ + HCOO

\quad C-C \alpha \quad C \alpha

&k a=\frac{c^2 \alpha^2}{e(1-\alpha)}\\\\&K_a=\frac{c \alpha^2}{1-\alpha_4} \quad|\gg\rangle \alpha\\\\&K_a=c \alpha^2\\\\&\alpha=\sqrt{\frac{k a}{c}}\\\\&\alpha=\sqrt{\frac{1.8 \times 10^{-4}}{0.0115}}\\\\&\alpha=\sqrt{156: 527710^{-4}}\\\\&\alpha=\sqrt{1.565 \times 1 \sigma^2}\\\\&\alpha=1.25 \times 10^{-1}\\\\&\alpha=0.125\\

&\left[\mathrm{H}^{+}\right]=\mathrm{C \alpha}\\\\&=0.125 \times 0.0115\\\\&=1.4375 \times 10^{-9}\\\\&P=-\log \left[H^{+}\right]\\\\&=-\log \left[1.4375 \times 10^{-3}\right]\\\\&P H=2.8424

Read more about  chemical equation

brainly.com/question/28294176

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8 0
1 year ago
How many moles are in 75.0 grams of nitrogen gas, N2?
Westkost [7]

<u>Given:</u><u>                                                                                                                       </u>

Mass of Nitrogen (N₂) gas = 75 grams

<u>Finding the number of moles of N₂:</u><u>                                                                     </u>

We know that the molar mass of N₂ is 28 grams/mole

Number of moles = Given mass / Molar mass

Number of moles = 75 / 28

Number of moles = 2.68 moles

Hence, there are 2.68 moles in 75 grams of Nitrogen Gas

7 0
3 years ago
How many valence electrons does zinc oxide have?
Oduvanchick [21]
Zinc oxide has 2 valence
3 0
2 years ago
Read 2 more answers
Heat energy is transferred by conduction whenever molecules_____
Y_Kistochka [10]
Nope c is da answer ok???
3 0
3 years ago
Read 2 more answers
How many moles of carbon dioxide are produced from the reaction of oxygen with four moles of propane (C3H8)? C3H8 + 502 —&gt; 3C
BigorU [14]

Answer:

12 moles

Explanation:

1. Do comparison

From the equation, 1 mole of C3H8 yields 3 moles of CO2

Therefore, 4 moles of C3H8 should yield 12 moles of CO2

Steps:

Number of moles of CO2

= (1 mol x 4) x 3

= 12 moles

3 0
2 years ago
Read 2 more answers
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