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s2008m [1.1K]
3 years ago
14

I need help with these

Chemistry
1 answer:
Dafna11 [192]3 years ago
8 0
Can you elaborate this a little more?
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4 years ago
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A sample of gold (Au) has a mass of 35.12 g. what is the moles of each element for AU?
vlada-n [284]
To determine the number of moles(n) of a substance, divide its amount given in grams by the molar mass. The element in the problem is gold (Au) which has a molar mass of 196.97 grams per mole. The division is better illustrated below
 
                                     n = 35.12 g / 196.97 grams per mole

The answer to the operation above is 0.1783 moles. Therefore, there are approximately 0.1783 moles of Au in 35.12 grams.


5 0
3 years ago
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BlackZzzverrR [31]
I would say the last maybe because my sister just got back from switerland not to long ago
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4 years ago
Q4. The student started with 16.0 grams of NaCl, show the calculation for the percent error that
Vedmedyk [2.9K]

Answer:

72.6% Error

Explanation:

% error = \frac{Real-Measured}{Real} * 100

\frac{58.44-16}{58.44} *100= 72.6

58.44 is the weight of NaCl

5 0
3 years ago
A 10-kg object is pushed across a rough surface. It begins at rest and accelerates to a speed of 4 m/s in a distance of 5m. Whic
Lynna [10]

Answer:

C) The object accelerates across the surface.

Explanation:

4 0
4 years ago
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