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astra-53 [7]
3 years ago
9

What mass of sulfur would have precisely 4.7x10^22 atoms of sulfur?

Chemistry
2 answers:
Svetllana [295]3 years ago
7 0

Answer:

2.498g

Explanation:

First off it's important to know Avogadro's number relationship with number of moles and molar mass.

It is given as;

1 mole = 6.02 * 10^23 atoms.

A mole's weight is equal to it's molar mass. Hence the equation can be changed to;

1 mole = molar mass = 6.02 * 10^23 atoms

In this problem, molar mass of Sulphur is 32g/mol. This means 1 mole of sulphur weighs 32 g and contains 6.02 * 10^23 atoms. What mass of sulphur would then contain 4.7x10^22 of atoms?

This leads us to;

32 g =  6.02 * 10^23

x g =  4.7x10^22

Upon cross multiplication, we have;

x =  (4.7x10^22 * 32) / 6.02 * 10^23

x = 24.98 * 10^-1

x = 2.498g

butalik [34]3 years ago
7 0

Answer: It would be 2.5

Explanation:

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Wewaii [24]

Answer:

Y=50.9\%

Explanation:

Hello,

In this case, given the reaction, we can directly compute the theoretically yielded grams of carbon dioxide, considering the 2:2 molar ratio between carbon monoxide (molar mass = 28 g/mol) and carbon dioxide (molar mass = 44 g/mol) and the initial reacting grams of carbon monoxide in excess oxygen:

m_{CO_2}^{theoretical}=10gCO*\frac{1molCO}{28gCO}*\frac{2molCO_2}{2molCO}*\frac{44gCO_2}{1molCO_2}   =15.7gCO_2

Thus, as only 8 g were actually yielded, we compute the percent yield:

Y=\frac{8g}{15.7g}*100\% \\\\Y=50.9\%

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7 0
3 years ago
if we began with 32.0 grams of oxygen and all of the hydrogen that you need, how many grams of water can be made?
Elza [17]

36 gram of water can be made.

 The molar mass of O is 16g and Hydrogen is 1g in H2O there is one oxygen only but in question is given 32g of oxygen so, 2 moles of oxygen should be there so it will become 32g that means 2H2O so overall 2[2*1+16] = 36g.

What is Balanced equation?

When number of moles of both the reactants and products are equal then it is known as balanced chemical equation.  

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4 0
1 year ago
Elaborate on the suitability of "cola" type drinks to polish chrome surfaces. A) The basic pH of cola allows for easy removing o
pav-90 [236]
The answer is: <span>B) The phosphoric acid in cola easily removes dirt and grime.
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Cola is a drink containing phosphoric acid in its complex composition. Acidic properties of Cola allow her to remove rust, dirt, and grime from chrome surface. In the same time, it is a very diluted solution of phosphoric acid which is very important not to damage a metal.
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Which description best matches Democritus idea of the atom?
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3 years ago
The best material to be used in making cooking pots handles is made of: a. Polypropylene b. Bakelite c. Rubber d. Polyethylene
frutty [35]

Answer:

b. Bakelite

Explanation:

Bakelite -

Bakelite is a form if plastic , and is the very first plastic synthesized .

The handles of the cooking utensils are used to hold the utensil firmly , and hence need not turn hot while cooking , and need to be strong enough to take care of the food .

Hence , the handle should be of the material which is poor conductor of heat and strong .

Hence , bakelite is used for making the handle.

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