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4 years ago

How many significant figures are there in the measurement 0.003kg

Chemistry

1 answer:

salantis [7]4 years ago

6 0

Answer:

-4

Explanation:

In 0.0034 the zeros are preceding numberd and after the decimal point.

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Sodium sulfate dissolves as follows: Na2SO4(s) → 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of s

maxonik [38]

Answer: The number of moles of $Na_2SO_4$ is 0.05 moles.

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

We are given:

Molarity of solution = 0.10 mol/L

Volume of solution = 1 L

Putting values in above equation, we get:

$0.10mol/L=\frac{\text{Moles of sodium}}{1.0L}\\\\\text{Moles of sodium}=0.10mol$

The chemical reaction for the ionization of sodium sulfate follows the equation:

$Na_2SO_4(s)\rightarrow 2Na^+(aq.)+SO_4^{2-}(aq.)$

By Stoichiometry of the reaction:

2 moles of sodium ions are produced by 1 mole of sodium sulfate

So, 0.10 moles of sodium ions will be produced by = $\frac{1}{2}\times 0.1=0.05moles$ of sodium sulfate.

Hence, the number of moles of $Na_2SO_4$ is 0.05 moles.

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3 years ago

HOW TO KEEP YOU'RE IMUNE SYSTEM HEALTY 5 QUESTIONS NO LINKS

Ludmilka [50]

Answer:

1= wash your hands

2 Eat a diet high in fruits and vegetables.

3 Exercise regularly.

4 Maintain a healthy weight..

5 Get adequate sleep.

6 Take steps to avoid infection, such as washing your hands frequently and cooking meats thoroughly.

Explanation:

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2 years ago

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Which element has the smallest atomic radius

grandymaker [24]

I believe it's helium at 0.49 A

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3 years ago

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Marta_Voda [28]

Answer:

Explanation:

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3 years ago

What energy transformations occur between the microwave oven and the meal? *

dem82 [27]

Electrical energy turns into thermal, sound, radiant, and mechanical energy (all kinetic)

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4 years ago