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blagie [28]
2 years ago
13

PLease help my imma mark brainlist plsss

Chemistry
1 answer:
iogann1982 [59]2 years ago
4 0

Answer:

Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.

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What effects do melatonin’s have
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Answer: Melatonin has been used safely for up to 2 years in some people. However, it can cause some side effects including headache, short-term feelings of depression, daytime sleepiness, dizziness, stomach cramps, and irritability. Do not drive or use machinery for four to five hours after taking melatonin.

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3 years ago
All energy originates from the _______.
Phantasy [73]

Answer:

sun

Explanation:

because all plants use energy from the sun to make food and grow

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3 years ago
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During normal, relaxed respiration, about 500ml of air enters and leaves the lungs with each respiratory cycle. this is called t
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During normal respiration, about 500ml of air enters and leaves the lungs with each respiratory cycle. This is called the<u> tidal volume</u>.

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6 0
1 year ago
1. A chemical equation is balanced when *
lubasha [3.4K]

Answer:1 Answer. A chemical equation is balanced when the number of each kind of atom is the same on both sides of the reaction,,

6 0
2 years ago
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What is the maximum length of a polyethene chain with molar mass 10^6 and monomer length 2.5?
ziro4ka [17]

Answer:

L=7.0125*10^-5

Explanation:

LET  

 Length of polyethene chain= L

Molecular weight OF polyethene= MW

Molecular weight of monomer =mw

Monomer length= l

L=(MW/mw) *l

              L= (28.05g/mol10^6gmol-1) * 2.5

             L=70.125*10^-6

            L=7.0125*10^-5

Hence, the length will be L=7.0125*10^-5 .

7 0
3 years ago
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