3 years ago

I need help on this question

Chemistry

2 answers:

IRINA_888 [86]3 years ago

6 0

I think positive feedback

Deffense [45]3 years ago

5 0

B. I’m sorry if I’m wrong ! Wasn’t sure about this question .

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2.822 mol of nickel has _________ atoms of nickel. (Enter just the number for this one.)

Irina-Kira [14]

Hello!

To find the number of atoms in 2.822 moles of nickel, we need to multiply it by Avogadro's number. Avogadro's number is 6.02 x 10^23 atoms.

2.822 moles x (6.02 x 10^23) ≈ 1.698844 x 10^24

Therefore, there are about 1.70 x 10^24 atoms (according to the number of significant figures) in 2.822 moles of nickel.

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Calculate the volume in milliliters of a 0.420mol / L barlum chlorate solution that contains 25.0 g of barium chlorate (Ba(ClO 3

Pachacha [2.7K]

Answer: The volume of barium chlorate is 195.65 mL

Explanation:

To calculate the volume of solution, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

Given mass of barium chlorate = 25.0 g

Molar mass of barium chlorate = 304.23 g/mol

Molarity of solution = 0.420 mol/L

Volume of solution = ?

Putting values in above equation, we get:

$0.420mol/L=\frac{25.0\times 1000}{304.23\times V}\\\\V=\frac{25.0\times 1000}{304.23\times 0.420}=195.65mL$

Hence, the volume of barium chlorate is 195.65 mL

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A dam is used to retain water. Retaining water can also lead to flooding. Which most likely would be a new societal issue result

pantera1 [17]

Habitat destruction of the ecosystem.

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swat32

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The red balls represent _____ and have a positive charge.

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The answer is protons. Neutrons have no charge and electrons have a negative charge so the positive charge must be protons.

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