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Aleks [24]
2 years ago
11

A student conducts an experiment using a common but potentially harmful bacteria culture. After working with the bacteria, which

is the MOST important safety
practice to follow?
O A. return materials to their proper place
B. wash hands ay tabletops thoroughly
C. tum off any electrical equipment
D. dispose of waste materials
Chemistry
1 answer:
Nadya [2.5K]2 years ago
3 0
I believe the answer is B.
Hope this helps! If not d
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Which statement explains the energy term in this reaction
lana66690 [7]

Answer:

Mass is lost due to the conversion of mass to energy

Explanation:

The question is not complete, the complete question is given as:

        ^{235}_{72}U +^{1}_{0}n                       ⇒        ^{140}_{56}Ba+^{93}_{36}Kr+3^{1}_{0}n+energy

total mass equals 236.053 u              total mass equals 235.868 u

Which statement explains the energy term in this reaction? (1) Mass is gained due to the conversion of mass to energy. (2) Mass is gained due to the conversion of energy to mass. (3) Mass is lost due to the conversion of mass to energy. (4) Mass is lost due to the conversion of energy to mass.

Answer: From Einstein’s equation  E = mc², when a radioisotope element undergoes fission or fusion in a nuclear reaction, it loses a tiny amount of mass.This mass lost is converted to energy.

The law of conservation of energy  holds for this type of reaction (i.e  the sum of mass and energy is remains the same in a nuclear reaction). Mass changes to energy, but the total amount of mass and energy combined remains the same before and after a nuclear reaction.

From the reaction above, the total decrease in mass = 236.053 - 235.868 = 0.185 u

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3 years ago
Which best describes teratogen
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A teratogen is an exposure (substance, organism or process) in pregnancy that has a harmful effect on the fetus. Teratogens can be diseases, medications, drugs and environmental exposures.
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Answer is proteins (C)

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Please help! I have less than an hour left!​
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Carbocation
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