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Nataly [62]
3 years ago
14

Most radiation exposure comes from A. consumer products. B. nuclear medicine. C. medical X-rays. D. natural sources.

Chemistry
2 answers:
Verizon [17]3 years ago
5 0
The answer is B) nuclear medicine
Lady_Fox [76]3 years ago
5 0

The answer is D. natural sources.

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Why do gases spread throughout the air, but liquids or solids stay together?
NeX [460]

Answer:

In gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.

Explanation:

6 0
3 years ago
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What mass of NaCl is dissolved in 150 g of water in a .050<br> msolution?
mart [117]

Answer:

0.4383 g

Explanation:

Molality is defined as the moles of the solute present in 1 kg of the solvent.

It is represented by 'm'.

Thus,  

Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}

Given that:

Mass of solvent, water = 150 g = 0.15 kg ( 1 g = 0.001 g )

Molality = 0.050 m

So,

0.050=\frac {Moles\ of\ the\ solute}{0.15}

Moles = 0.050\times 0.15\ mol= 0.0075\ mol

Molar mass of NaCl = 58.44 g/mol

Mass = Moles*Molar mass = 0.0075\times 58.44\ g = 0.4383 g

6 0
3 years ago
For the reaction N2 + 3H2 = 2NH3, if you have 2.00 moles of N2 and 4.00 moles of H2 : a. Identify the limiting reactant. _______
EastWind [94]

Answer:

The answer to your question is below

Explanation:

For the reaction N2 + 3H2 = 2NH3, if you have 2.00 moles of N2 and 4.00 moles of H2 : a. Identify the limiting reactant. ____________

                                   N2     +     3H2      =      2NH3

                                 1 mol         3 moles        2 moles

Given                       2 moles     4 moles

   

       Rule of three for N2

                    x =  (2 x 3) / 1 = 6 mol  of H2, it means that is needed 6 moles of H2 and there are only 4, so the limiting reactant is H2                                

b. How many moles of NH3 can be formed? ____________

           rule of three

                                3 moles of H2 ---------------------  2 moles of NH3              

                                4 moles of H2  ---------------------   x

                     x = (4x2)/3 = 2.7 moles of NH3 are formed

c. How many moles of the excess reactant will remain? _________

      x = (4 x 1) / 3     =  1.33

Excess reactant = 2 - 1.33 = 0.67 moles                  

   

5 0
3 years ago
Answer fast plzzzzzzzz
Sergeeva-Olga [200]

Answer:

A

Explanation:

The pesticides and chemicals in are food could get us seriously sick and cause food poisoning.  We are hurting our water by dumping sewage water into lakes and rivers did you ever think that someday a river or a lake will mix in with the ocean.

6 0
3 years ago
What happens to elements and compounds that are dissolved in a solution when the water evaporates?
BARSIC [14]
The answer is they crystallize
5 0
3 years ago
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