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natta225 [31]
3 years ago
9

Anyone have any idea what to do

Chemistry
1 answer:
ra1l [238]3 years ago
4 0

Answer:

2Al+3Fe ------- Al2O3+3Fe

this is answer no 2

N2+3H2------- 2NH3

this is answer no 3

I think helps

Best of luck

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If the pOH of a solution is 9.1, what is the concentration of OH- ions in that solution?
Amiraneli [1.4K]

Answer:

7.9432*10^-10 or 10^-9.1

Explanation:

pOH=-log[OH]

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3 years ago
Pleaseeeeeee hlepThe half-life of cobalt-60 is 5.26 years. After 10.52 years, 5 grams of a 20-gram sample will remain.
vladimir1956 [14]

The half-life of cobalt-60 is 5.26 years. After 10.52 years, 5 grams of a 20-gram sample will remain is TRUE

<u>Explanation:</u>

Mass of cobalt = 20 g  

Half-life = 5.26 years  

Mass remains after 10.52 years = 5 g  

This can be solved by using given below formula, m(t)=m_{o}\left(\frac{1}{2}\right)^{\frac{l}{5.26}}

m_{0} = initial mass  

t = number of years from when the mass was m_0  

m(t) = remaining mass after t years  

Number of half-lives = \frac{\text { Time elapsed }}{\text { Half -life }}

Number of half-lives = \frac{10.52 \text { years }}{5.26 \text { years }}

Number of half-lives = 2  

At time zero = 20 g  

At first half-life = \frac{20\ g}{2}  = 10 g  

At second half life = \frac{10\g}{2} = 5 g  

The given statement is true.

4 0
3 years ago
_______ and _______ are located in the nucleus of the atom, while _______ exist in areas of probability around the nucleus.
Reika [66]
The correct answer would be C.
6 0
3 years ago
If 1.85 g of Mg(OH)2 reacts with 3.71 g of HCl,
Damm [24]
Both of them are a hope this helps
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If you have a mole of carbon atoms, how many atoms do you have?
Aleonysh [2.5K]

Answer:

6.02×10^23 atoms

Explanation:

Avogadros constant is a number that states the amount of atoms in one mole of a substance which is 6.02×10^23 to 3 significant figures.

8 0
2 years ago
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