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Aleksandr [31]
2 years ago
10

What is the average of the two weights of a nickel and dime. Dime is 2.26g and nickel is 4.97g?

Chemistry
1 answer:
ANTONII [103]2 years ago
5 0
  • Dime=2.26g
  • Nickel=4.97g

\\ \rm\Rrightarrow Avg\:Weight=\dfrac{Sum\:of\:Weights}{No\:of\:weights}

\\ \rm\Rrightarrow Avg\:weight=\dfrac{2.26+4.96}{2}

\\ \rm\Rrightarrow Avg\;weight=\dfrac{7.23}{2}

\\ \rm\Rrightarrow Avg\:Weight=3.6g

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artcher [175]

Answer:

1. V₁ = 2.0 mL

2. V₁ = 2.5 mL

Explanation:

<em>You are provided with a stock solution with a concentration of 1.0 × 10⁻⁵ M. You will be using this to make two standard solutions via serial dilution.</em>

To calculate the volume required (V₁) in each dilution we will use the dilution rule.

C₁ . V₁ = C₂ . V₂

where,

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1 refers to the initial state

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C₁ . V₁ = C₂ . V₂

(1.0 × 10⁻⁵ M) . V₁ = (2.0 × 10⁻⁶ M) . 10.0 mL

V₁ = 2.0 mL

<em>2. Perform calculations to determine the volume of the 2.0 × 10⁻⁶ M solution needed to prepare 10.0 mL of a 5.0 × 10⁻⁷ M solution.</em>

C₁ . V₁ = C₂ . V₂

(2.0 × 10⁻⁶ M) . V₁ = (5.0 × 10⁻⁷ M) . 10.0 mL

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8 0
3 years ago
34. Explain how dimensional analysis is used to solve<br> problems.
alisha [4.7K]

Answer: By understanding conversion factors and how they are related to each other

Explanation:

Dimensional Analysis is a step by step approach to solving problems in Physics, Chemistry , and Mathematics. It involves having a clear knowledge and understanding to be able to convert a given unit to another in the same dimension using  conversion factors and knowing how they are related to each other.

For instance, In Chemistry, we want to Convert 120mL to L.(note that ml stands for millilitres and ;L stands for litres)

Or first approach will be to write out the conversion factor related to our problem which is

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giving us  120ml x 1L/1000ml =0.12L

This same process is applied to convert any type of dimensional analysis problems be it physics or mathematics.

7 0
3 years ago
The solid form of a substance is usually more dense than its liquid and gaseous forms. Similarly the liquid form is usually more
solniwko [45]
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7 0
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serious [3.7K]
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K is a constant called the molal freezing point depression constant and for the boiling point is the boiling point elevation constant. It is a property of the solvent. 
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m is the concentration of the solute in the solvent in terms of molality or kg solute/kg solvent. 
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i is the vant hoff factor which will represent the number of ions which the solute dissociates when in solution.</span>
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What is the standard unit used to measure mass
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3 years ago
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