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jeyben [28]
3 years ago
7

2. I want to create a density bottle with 3 solutions called A, B and C. I put 45 ml of solution A

Chemistry
1 answer:
Tamiku [17]3 years ago
4 0

Explanation:143

what i meant was thank you for the points but it is 143

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1. How many grams would 8.1 x 1021 molecules of sucrose (C12H22011)<br> weigh?
Nimfa-mama [501]

Answer:

Mass = 4.6 g

Explanation:

Given data:

Number of molecules of sucrose = 8.1 ×10²¹ molecules

Mass of sucrose = ?

Solution:

First of all we will calculate the number of moles by using Avogadro number.

1 mole × 8.1 ×10²¹ molecules / 6.022×10²³ molecules

1.35 × 10⁻² mol

Mass of sucrose:

Mass = number of moles × molar mass

Molar mass = 342.3 g/mol

Mass = 1.35 × 10⁻² mol ×342.3 g/mol

Mass = 462.1  × 10⁻² g

Mass = 4.6 g

7 0
3 years ago
When one mole of a solute is present in 500 cm3 of solution, then the concentration of the solution is:
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Answer:

0.5M is the answer.

Explanation:

1M solution is the solution containing 1mole solute dissolved per litre of solution.

Using unitary method,

1000cc gives 1M.

1cc gives 1/1000M.

500 cc gives 500/1000M=0.5M

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3 years ago
Which tool is most suitable for a chemist to measure the mass of a liquid
I am Lyosha [343]

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3 years ago
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If 200 mg of HCl is added to water to achieve a final volume of 1L, what is the final pH?
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2 years ago
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Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneo
Mashutka [201]

Answer:

a) Heterogeneous mixture (b) Homogenous mixture (c) Pure substance (d) Pure substance

Explanation:

Homogenous mixtures contains mixture of substances with similar proportions while Heterogenous mixture contains substances with a varying proportion.

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