3 years ago

What is the pH of an aqueous solution of HCl with a hydrogen ion

Chemistry

1 answer:

yulyashka [42]3 years ago

6 0

Answer:

pH = 5.17

Explanation:

pH = -log[H+] = -log(6.7 x 10^-6) = 5.17

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A block of magnesium has a mass of 14.3 g and a volume of 8.46 cm3. What is the density of

sveta [45]

Density is mass over volume, so:
14.3/8.46≈ 1.6903 g/cm^3

7 0

2 years ago

A student mixes a white solid and a clear liquid together. The mixture turning orange is evidence of a chemical reaction.

yulyashka [42]

Answer:

true

Explanation:

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3 years ago

Read 2 more answers

1.1 L of nitrogen dioxide were produced in the reaction seen below. How

Veseljchak [2.6K]

22.4 since it's in STp

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3 years ago

A chemistry teacher is able to grade chemistry labs at a rate of 5 labs for every 3 minutes. They need to grade 165 labs how man

PIT_PIT [208]

Answer:

1.65hr

Explanation:

Given parameters:

Number of labs = 5 labs

Time taken = 3 minutes

Unknown:

Time taken in hours to grade 165 labs = ?

Solution:

Let us find the rate of the teacher;

Rate = $\frac{number of labs}{time}$

Insert the parameters and solve;

Rate = $\frac{5}{3}$ = 1.67labs/min

Now;

Time to grade 165 labs = $\frac{number of labs}{rate}$

Time to grade 165 labs = $\frac{165}{1.67}$ = 98.8min

Since;

60min = 1hr

98.8min = $\frac{98.8}{60}$ = 1.65hr

3 0

3 years ago

Balance the following reaction:

kvv77 [185]

C_5H_8+13/2O_2—»5CO_2+4H_2O

Balanced one

2C_5H_8+13O_2—»10CO_2+8H_2O

Moles of Pentyne

Given mass/Molarmass
34/68
0.5mol

Moles of H_2O

8/2(0.5)
4(0.5)
2mol

1mol releases 241.8KJ

2mol releases 241.8(2)=483.6KJ

8 0

2 years ago