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WARRIOR [948]
3 years ago
5

PH of a 0.00072 M HCl solution.

Chemistry
1 answer:
harina [27]3 years ago
3 0

Answer:

3.14

Explanation:

pH=-log(H+)

- Hope that helps! Please let me know if you need further explanation.

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What is the mass of 2.70 ×10^22 molecules of NaOH (Molar mass = 40.0 g/mol)?
Viefleur [7K]
Data:
Molar Mass of NaOH = 40 g/mol

Solving: <span>According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules
</span>
1 mol -------------------- 6.02*10²³ molecules
y mol -------------------- 2.70*10²² molecules

6.02*10²³y = 0.270*10²³ 
y =  \frac{0.270*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}{6.02*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}
\boxed{y \approx 0.04\:mol}


Solving: <span>Find the mass value now
</span>
40 g ----------------- 1 mol of NaOH
x g ------------- 0.04 mol of NaOH

x = 40*0.04
\boxed{\boxed{x = 1.6\:g}}\end{array}}\qquad\quad\checkmark

Answer:
The mass is 1.6 grams
6 0
3 years ago
The Process of forming a new<br> eukaryotic cell is called​
gulaghasi [49]

Answer:

Mitosis I think

Explanation:

4 0
3 years ago
A piece of metal with a mass of 611 g is placed into a graduated cylinder that contains 25.1 mL of water rising the water level
djyliett [7]

Answer:

The answer is

<h2>2.64 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass = 611 g

volume = final volume of water - initial volume of water

volume = 256.7 - 25.1 = 231.6 mL

The density of the metal is

density =  \frac{611}{231.6}  \\  = 2.638169257...

We have the final answer as

<h3>2.64 g/mL</h3>

Hope this helps you

5 0
3 years ago
A population of rabbits is separated by a mountain range. Which of the following is most likely to occur?
galina1969 [7]

Answer:

c

Explanation:

we cannot say that either will die out, because we dont know the conditions. but we know that both sides out the mountian arent exactly the same, so we know they will evolve to adapt and grow with what they have

3 0
3 years ago
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For the following reaction, what volume of NOBr can be produced from 3.8 L of Br2 (measured at the same temperature and pressure
Oksanka [162]
Boi if you don’t get ya thing out of here with that who the hell knows that

Gimme the pts please thanks
6 0
3 years ago
Read 2 more answers
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