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Arisa [49]
3 years ago
7

What would you use to measure the height of a sample?

Chemistry
1 answer:
andrew-mc [135]3 years ago
3 0

Answer:

please clear ur ques with image

it's unable to be understood

...

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80 points!! Need help asap!!
Bess [88]

Answer:

i feel like a is right i dont know but i would just guess

Explanation:

6 0
3 years ago
Read 2 more answers
2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O
Gnom [1K]

<u>Answer:</u> 0.5 moles of N_2 are produced in the reaction

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

Given mass of CuO = 113.6 g

Molar mass of CuO = 79.5 g/mol

Plugging values in equation 1:

\text{Moles of CuO}=\frac{113.6g}{79.5g/mol}=1.43 mol

For the given chemical reaction:

2NH_3+3CuO\rightarrow 3Cu+N_2+3H_2O

By the stoichiometry of the reaction:

If 3 moles of CuO produces 1 mole of N_2

So, 1.43 moles of CuO will produce = \frac{1}{3}\times 1.43=0.476=0.5mol of N_2

Hence, 0.5 moles of N_2 are produced in the reaction

5 0
3 years ago
**PLEASE ANSWER QUICK, I'LL GIVE BRAINLIEST TO THE RIGHT ANSWER !!**
rewona [7]

Answer:

c

Explanation:

the correct answer would be answer c

6 0
2 years ago
Only six elements make up 99% of the human body's mass. The six elements are
ELEN [110]

B:

Although there are almost 100 elements in nature, only six of them compose 99% of our body’s mass— carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus.

6 0
4 years ago
Read 2 more answers
Elements that can have several different structures with different physical properties are called?
Sergeeva-Olga [200]
Liquid for sure,
mercury,
gas,
all i can think off
4 0
4 years ago
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