All categories

3 years ago

PLEASE HELPP

Chemistry

1 answer:

rodikova [14]3 years ago

7 0

Answer:

Option (C) 1 × 10^−12

Explanation:

Step 1:

Data obtained from the question include:

[H+] = 1x10^−2

[OH−] =?

Step 2:

Determination of [OH−] . This is illustrated below:

[H+] x [OH−] = 1x10^-14

1x10^−2 x [OH−] = 1x10^-14

Divide both side by 1x10^−2

[OH−] = 1x10^-14 / 1x10^−2

[OH−] = 1x10^-12

Therefore, the [OH−] of the solution is 1x10^-12

You might be interested in

Chemistry help! Please zoom in to see better

sergeinik [125]

Answer:

82.04g

Explanation:

To solve this problem, you need to find the molar mass of HCl, which is the sum of the molar mass of H plus the molar mass of Cl. The molar mass of H is 1.008g/mol while the molar mass of Cl is 35.45g/mol. Thusly the molar mass of HCl is 36.458g/mol. You have 2.25 moles of HCl, so multiply the number of moles by the molar mass to get the mass in g. In this case it is 2.25mol * 36.458g/mol = 82.04g.

If I helped, a brainliest would be greatly appreciated!

3 0

3 years ago

What is the atomic number of magnesium?

nika2105 [10]

Magnesium's atomic number is 12

4 0

3 years ago

If you have 3.48 x 1023 formula units of Lead (II) Permanganate, what is its mass?

Tanya [424]

Answer:

$\large \boxed{\text{257 g}}$

Explanation:

We can convert the formula units to moles and then use the molar mass to find the mass.

1. Moles of Pb(MnO₄)₂

$n = 3.48 \times 10^{23}\text{ formula units} \times \dfrac{\text{1 mol}}{6.022 \times 10^{23}\text{ formula units}} = \text{0.5779 mol}$

2. Mass of Pb(MnO₄)₂

$\text{Mass} = \text{0.5779 mol} \times \dfrac{\text{445.07 g}}{\text{1 mol u}} = \text{257 g}\\\\\text{The mass of lead(II) permanganate is $\large \boxed{\textbf{257 g}}$}$

4 0

4 years ago

Match the term with the definition.

ryzh [129]

Answer:

Condensation is when heat turns to water vapour

Melting is when solid turns to liquid

Freezing is when liquid turns to solid

Sublimation is when solid turns to gas without passing through the liquid state

4 0

3 years ago

Identify how the colligative properties of a solvent change when a solute is added, forming a solution.

Sati [7]

Colligative properties are properties that depends on ratio of the number of solute to the number of solvent . Colligative properties are essentially solvent properties that are changed by the presence of solute . The solute particles displaces some solvent molecules in the liquid phase and therefore reduce the concentration of solvent. So basically colligative properties are independent of the nature of the solute.

8 0

3 years ago