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Blizzard [7]
3 years ago
14

What element am I?

Chemistry
1 answer:
Serga [27]3 years ago
4 0

Answer:

H- hydrogen

Explanation: Hydrogen is in the first group meaning that it only has 1 valence electron and 1 energy level

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How many moles of Chromium are in 1.410 * 10 ^ 23 atoms of Chromium?
leva [86]

Answer:

<h3>The answer is 0.23 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1.410 \times  {10}^{23} }{6.02 \times  {10}^{23} }  \\  = 0.234219...

We have the final answer as

<h3>0.23 moles</h3>

Hope this helps you

4 0
3 years ago
Classify each reaction as combination, decomposition, single replacement, double replacement, or combustion. c2h4(g) + 3o2(g) →2
soldier1979 [14.2K]
If combined with oxygen. the reaction is usually combustion. in this case, it is the combustion of ethene
5 0
3 years ago
Which statement about electric and magnetic fields is true.
aksik [14]
The correct answer is 2. Magnetic fields must start at the north pole of a magnet and end at the south pole of a magnet. I took the test. Hope I helped!
5 0
3 years ago
Read 2 more answers
Determine the element symbol, number of protons, and number of electrons for an ion that has a mass number of 56, 30 neutrons, a
9966 [12]

Answer:

Al

Explanation:

Protons = mass number - neutrons   56-30 =26  closest is Al 27

Also in group 13 which loses 3 electrons to be  +3

8 0
3 years ago
Read 2 more answers
How many grams of Ca are contained in 113 mL of 0.52 M Ca (OH)2 solution
Kay [80]
<span>113 ml = 0.113L

0.52M = 0.52 mol/L

(0.52 mol/L) x 0.113L = 0.059 mol x (molar mass of Ca) = your answer. </span>
8 0
3 years ago
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