Ask question

Ask question

All categories

4 years ago

5

26.8 moles of argon contain how many atoms?

1 answer:

stepladder [879]4 years ago

4 0

Answer:

the answers is A

Explanation:

You might be interested in

Scientist A produces 83.67 g KMnO4 while Scientist B produces 81.35 g KMnO4.

noname [10]

Answer:

$Y_A=92.1\%\\\\Y_B=89.6\%$

Explanation:

Hello there!

In this case, according to the given chemical equation for the reaction for the production of potassium permanganate, we can see a 2:2 mole ratio of this product to the starting manganese (II) oxide, which means, we can calculate the theoretical yield of the former via stoichiometry:

$m_{KMnO_4}=50.0gMnO_2*\frac{1molMnO_2}{86.94gMnO_2}*\frac{2molKMnO_4}{2molMnO_2} *\frac{158.034gKMnO_4}{1molKMnO_4} \\\\m_{KMnO_4}=90.9gKMnO_4$

Now, we are able to compute the percent yields, by using the actual yield each scientist got:

$Y_A=\frac{83.67g}{90.9g} *100\%=92.1\%\\\\Y_B=\frac{81.35g}{90.9g} *100\%=89.6\%$

Regards!

8 0

3 years ago

Imagine that you have for food dyes to test A,B,C and D. Imagine that you are going to investigate which food dye diffuse most q

MissTica

I’m dgsgegegstdgstsffsrddgffddddsdgddffcffffffffdd

6 0

3 years ago

A student described two properties of a substance as shown.

MatroZZZ [7]

Answer:

both are physical properties

Explanation:

A is about it's malleability and B is about it's density. These are physical properties

4 0

3 years ago

anastassius [24]

the correct answer should be a

4 0

3 years ago

Read 2 more answers

Does anyone understand this?

Nikolay [14]

From start:

Joule, J, calorie,

Example 1: 120 J / 4.184 = 28.68 cal
Example 2: 1200 cal * 4.184 = 5020.8 J

7 0

4 years ago