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sergij07 [2.7K]
2 years ago
8

Which is an example of a fission reaction? Check all that apply.

Chemistry
2 answers:
Darya [45]2 years ago
4 0

Answer:

the answer is b and c.

Explanation:

got it right on edge 2021

vladimir2022 [97]2 years ago
4 0

Answer:

b and c

Explanation:

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What is the mass percent of oxygen in sodium bicarbonate (NaHCO3)?
Alenkasestr [34]
The answer is 57.14%.

First we need to calculate molar mass of <span>NaHCO3. Molar mass is mass of 1 mole of a substance. It is the sum of relative atomic masses, which are masses of atoms of the elements.

Relative atomic mass of Na is 22.99 g
</span><span>Relative atomic mass of H is 1 g
</span><span>Relative atomic mass of C is 12.01 g
</span><span>Relative atomic mass of O is 16 g.
</span>
Molar mass of <span>NaHCO3 is:
22.99 g + 1 g + 12.01 g + 3 </span>· <span>16 g = 84 g

Now, mass of oxygen in </span><span>NaHCO3 is:
3 </span>· 16 g = 48 g

mass percent of oxygen in <span>NaHCO3:
48 g </span>÷ 84 g · 100% = 57.14%

Therefore, <span>the mass percent of oxygen in sodium bicarbonate is 57.14%.</span>
8 0
3 years ago
Which land cover type has the least area in united states
Gre4nikov [31]

Answer:

I think the answer is forest

6 0
3 years ago
Read 2 more answers
PLEASE HELP!! EXPLAIN YOUR ANSWER PLEASE! :)
GaryK [48]
The formula for force is F=ma. Because weight is a measure of force, then we can substitute the weight of the meteor, 3204 N, for F in the the equation for force. We also know that the acceleration of gravity on Earth is 9.8 m/s^2. To find the mass, simply divide both sides of the equation by the value of acceleration to get
m =   \frac{f}{a}  =  \frac{3204}{9.8}  = 326.9
Therefore, the value of the mass of the meteor is 326.9 kg.
8 0
3 years ago
Why are invasive species such a huge threat to ecosystems?
Varvara68 [4.7K]

Answer:

C

Explanation:

invasive species can do intense damage so much that ecosystems may not be able to recover.

8 0
3 years ago
Surface temperatures on Venus, the hottest planet in our solar system, can reach 755K. Express this temperature in degrees Fahre
dmitriy555 [2]

Answer:

about 900 degree Fahrenheit

Explanation:

7 0
2 years ago
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