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Mariana [72]
3 years ago
14

What is the time required for contamination source

Chemistry
1 answer:
Afina-wow [57]3 years ago
8 0
Hi there!

It can take years to remove all of the harmful substances from the water.

I hope my answer helped :)
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calculate the number of moles of sulfuric acid that is contained in 250 mL of 8.500 M sulfuric acid solution
san4es73 [151]

Answer : The moles of H_2SO_4 are, 2.125 mole.

Explanation : Given,

Molarity of H_2SO_4 = 8.500 M

Volume of solution = 250 mL  = 0.250 L    (1 L = 1000 mL)

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Moles of }H_2SO_4}{\text{Volume of solution (in L)}}

Now put all the given values in this formula, we get:

8.500M=\frac{\text{Moles of }H_2SO_4}{0.250L}

\text{Moles of }H_2SO_4=2.125mol

Therefore, the moles of H_2SO_4 are, 2.125 mole.

5 0
3 years ago
Which of the following best describes a Lewis base?
PolarNik [594]
Not 100% sure but I believe it is C.
4 0
3 years ago
Read 2 more answers
A gas that exerts a pressure of
spayn [35]

Answer:

3.089 L

Explanation:

From the given information, provided that the no of moles and the temperature remains constant;

P_1 = 15.6 psi

V_1 = ???

P_2 = 25.43 psi

V_2 = 1.895 L

Using Boyle's law:

P_1V_1 =P_2V_2 \\ \\ V_1 = \dfrac{P_2V_2}{P_1} \\ \\  V_1 = \dfrac{25.43 \times 1.895}{15.6}  \\ \\ \mathbf{  V_1 = 3.089  \ L}

4 0
3 years ago
Look at the diagram. What number needs to be added to balance the equation?
suter [353]

Answer:

2

Explanation:

because hydrogen is a diatomic element, so it can't be just H

4 0
3 years ago
Which statement is true about an empirical formula?
ExtremeBDS [4]
The statement that is true about an empirical formula is it <span>is the simplest ratio of atoms in a formula unit. The answer is number 2. The rest of the statements do not answer the question above.</span>
6 0
3 years ago
Read 2 more answers
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