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3 years ago

The correct formula for sodium oxide is?

Chemistry

1 answer:

kifflom [539]3 years ago

4 0

Its Na20
the formula for sodium oxide

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Which material is very strong and tough but shows very little elongation as it absorbs energy?

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3 years ago

Select the correct answer.

muminat

Answer:- B. 4.65 g.

Solution:- The given balanced equation is:

$2AgNO_3(aq)+Na_2S(aq)\rightarrow Ag_2S(s)+2NaNO_3(aq)$

It asks to calculate the mass of silver sulfide formed by when 0.0150 liters of 2.50 M of silver nitrate are used.

Moles of silver nitrate are calculated on multiplying it's liters by its molarity and then on multiplying by mol ratio, the moles of silver sulfide are calculated. These moles are multiplied by the molar mass to convert to the grams.

Molar mass of $Ag_2S$ = 2(107.87)+32.06 = 247.8 g per mol

The dimensional set up for the complete problem is:

$0.0150L(\frac{2.50molAgNO_3}{1L})(\frac{1molAg_2S}{2molAgNO_3})(\frac{247.8gAg_2S}{1molAg_2S})$

= $4.65gAg_2S$

So, the correct choice is B. 4.65 g.

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3 years ago

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<h2>#1</h2><h3>Which process is used for preparation of Sodium Carbonate? </h3>

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2 years ago

Burning gas on a stovetop transforms chemical energy into what other types of energy?

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Explanation:

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Breaking and combining of bonds during combustion gives heat and light.This thermal energy heats the vessels and cooks the food through the process of conduction, convection and radiation. 

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