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butalik [34]
4 years ago
11

How many neutrons does element X have if its atomic number is 29 and its mass number is 99?

Chemistry
1 answer:
stira [4]4 years ago
4 0
Number of neutrons = mass number - atomic number

= 99-29 = 70 
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What error, if any, would the calculated density of the solid have if the material had a hollow center?
maria [59]

Answer:

3) The calculated density would be high, because the volume would be incorrectly measured low.

Explanation:

Density is defined as mass per unit volume. It means the density is inversely proportional to the volume.

A solid with a hollow center will have high volume due to air inside the hollow area that will lead to low density.

But the error in the calculation of density is that the "density would be high, because the volume would be incorrectly measured low."

Hence, the correct answer is "3)"

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3 years ago
Emma strikes a match and sets some logs on fire. As the fire burns, which two forms of energy are released?
Ivanshal [37]

Answer:

Explanation:

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There's light energy given off.

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7 0
3 years ago
The active planning stage of change is ____________. Group of answer choices maintenance action contemplation preparation
AfilCa [17]

Answer:

-Determination -  in this stage, people have make commitment to change the bad habit as soon as possible. it is stage of planning.

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- contemplation - At this stage, people are more serious about their bad habit and now are thinking of changing

-Determination -  in this stage, people have made a commitment to change the bad habit as soon as possible. it is stage of planning.

- Action - at this stage of change people are taking a serious step toward changing their behavior

- Maintenance -  in this stage people are avoiding all those criteria and source through which there is a chance to return back to bad habits

-Relapse -  at this stage people do resumption of old behavior

7 0
4 years ago
What type of radiation is carbon emitting in the following equation? 14/6C - 0/-1 + 14/7N A. alpha particles B. beta particles C
dolphi86 [110]
I think the answer is C
7 0
3 years ago
Read 2 more answers
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just olya [345]

Answer:

Water

Explanation:

Sugar and salt would both be considered solutes, and out of vinegar and water, water is the most common solvent.

Have a nice day!

5 0
3 years ago
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