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3 years ago

How many grams of water are needed to add to 4.00 grams NaOH to create a 2.00% solution

Chemistry

1 answer:

alexira [117]3 years ago

8 0

Answer:

The answer to your question is 200 g

Explanation:

Data

mass of water = ?

mass of NaOH = 4 g

concentration = 2 %

Formula

% mass = mass of solute/mass of solution x 100

-Solve for mass of solution

mass of solution = mass of solute / % mass x 100

-Substitution

mass of solution = 4 / 2 x 100

-Simplification

mass of solution = 2 x 100

-Result

mass of solution = 200 g

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Answer:

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2 years ago

What is kinetic energy of a 155 kg object moving at speed of 20 m/s

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Answer:

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Explanation:

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2 years ago

Match the symbol for each element with the name of the element. 1. hydrogen K 2. helium Mg 3. sodium He 4. magnesium H 5. potass

insens350 [35]

Answer:

1. hydrogen - H

2. helium - He

3. sodium - Na

4. magnesium - Mg

5. potassium - K

Explanation:

Hydrogen is the element of group 1 and first period. The atomic number of hydrogen is 1 and the symbol of the element is H.

The electronic configuration of the element hydrogen is:-

$1s^1$

Helium is the element of group 18 and first period. The atomic number of helium is 2 and the symbol of the element is He.

The electronic configuration of the element helium is:-

$1s^2$

Sodium is the element of group 1 and third period. The atomic number of sodium is 11 and the symbol of the element is Na.

The electronic configuration of the element sodium is:-

$1s^22s^22p^63s^1$

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The electronic configuration of the element magnesium is:-

$1s^22s^22p^63s^2$

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The electronic configuration of the element potassium is:-

$1s^22s^22p^63s^23p^64s^1$

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3 years ago

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telo118 [61]

Answer:

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Explanation:

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where "R" is a ideal gas constant

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"n" is number of particles given in moles while "V" is volume and "P" is pressure.

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