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3 years ago

Which items are directly related to radioactive decay

Chemistry

1 answer:

uranmaximum [27]3 years ago

3 0

E=mc^2 and mass defect

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What are the effects of convection currents in our surroundings?

miskamm [114]

Land breeze sea breeze,ventilation,etc

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4 years ago

Chemical reactionthe formation of a the formation of a helium and water

Svetlanka [38]

Answer:

Hydrogen and oxygen combine to form water by the formula:

2 H2 + O2 → 2 H2O

The formation reaction of this process is:

H2 + ½ O2 → H2O

Explanation:

hope it helps brainly me also if you can ;3

6 0

3 years ago

A 52.0 mL portion of a 1.20 M solution is diluted to a total volume of 278 mL. A 139 mL portion of that solution is diluted by a

RoseWind [281]

Answer:

$C_3=0.125M$

Explanation:

Hello!

In this case, we can divide the problem in two steps:

1. Dilution to 278 mL: here, the initial concentration and volume are 1.20 M and 52.0 mL respectively, and a final volume of 278 mL, it means that the moles remain the same so we can write:

$V_1C_1=V_2C_2$

So we solve for C2:

$C_2=\frac{C_1V_1}{V_2}=\frac{52.0mL*1.20M}{278mL}\\\\C_2=0.224M$

2. Now, since 111 mL of water is added, we compute the final volume, V3:

$V_3=139+111=250mL$

So, the final concentration of the 139 mL portion is:

$C_3=\frac{139 mL*0.224M}{250mL}\\\\C_3=0.125M$

Best regards!

8 0

3 years ago

What percentage of a substance remains after 7 half-lives have passed?

Mila [183]

Answer:

Not really sure, buts its either B or C.

5 0

3 years ago

6. What is the molarity of 175 mL of solution containing 2.18 grams of NazS04-10H2O?

Ymorist [56]

Answer:

$Molarity\,\,of\,\,the\,\,solution\,\,is\,\,S=0.039M$

Explanation:

$W=2.18 g\\M=322g\\V=175mL=0.175L\\\\S=\frac{W}{MV} \\=>S=\frac{2.18}{322*0.175} \\So,S=0.039M$

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8 0

3 years ago