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Anit [1.1K]
3 years ago
8

Compared To 620 nm photon, a 760 nm photon has ?

Chemistry
1 answer:
Kitty [74]3 years ago
6 0
140 more nm's ? lol jk don't say that
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How do you find moles
lesantik [10]
The equation for finding how many moles are in a substance is

moles = mass / relative formula mass,
where mass is measured in g.

The r.f.m. (relative formula mass) is found by adding together all of the atomic masses of the elements in a substance. 

e.g.  CO2 (carbon dioxide) has 1 atom of carbon and two atoms of oxygen.
The relative atomic mass of carbon is approximately 12.
The relative atomic mass of oxygen is approximately 16.

12 + (2 x 16) = 44
The r.f.m. of carbon dioxide is 44.

You would then divide the mass of the substance (how much there is of it) by its r.f.m. to find the mole number.
5 0
3 years ago
What element behaves MOST like magnesium (Mg)?<br> A) S <br> B) Si <br> C) Sn <br> D) Sr
tatyana61 [14]

Strontium (Sr). Elements in the same group of the periodic table have similar characteristics.

3 0
3 years ago
Read 2 more answers
If a sample has a mass of 1.25 x 102 g and a volume of 51 mL, what is its density?
Dafna11 [192]

Answer:

<h2>2.45 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

d =  \frac{m}{v}  \\

We have

d =  \frac{1.25 \times  {10}^{2} }{51}  \\  = 2.45098..

We have the final answer as

<h3>2.45 g/mL</h3>

Hope this helps you

3 0
3 years ago
Which of the following elements is not an inner transition metal
Drupady [299]

Answer:

lanthanum

Explanation:

lanthanum is an inner transition metal

8 0
3 years ago
Read 2 more answers
PLEASE HELP!!
Luden [163]

Answer:

10 hope this helps

4 0
4 years ago
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