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fgiga [73]
2 years ago
15

Hi! I wanted to know what my grade would be for my test. There are 23 questions in total. 2 of the 23 questions are essay questi

ons that are worth 4 points each. I got two questions wrong that were worth 1 point each. Thank you!!
Chemistry
1 answer:
kolbaska11 [484]2 years ago
6 0

Answer:

high B or a low A:) Good Luck

Explanation:

You might be interested in
Mutations are more important to the evolution of a species because
EleoNora [17]

Answer: Mutations are important to the evolution of a species because is creates new DNA for a certain gene, creating a new allele.

Hope this helps!!! Good luck!!! ;)

8 0
3 years ago
When writing equations the mass on the left of the arrow must
sp2606 [1]

Answer:

When writing equation the mass on left side of equation must be equal to the mass on right side. True

Explanation:

The chemical reactions always follow the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass because total mass is equal on both side of equation.

6 0
3 years ago
What is the energy of a photon of red light that has a frequency of 4.48 X 10^14Hz?
lana [24]

Answer:

E = 29.7× 10⁻²⁰  j

Explanation:

Given data;

Frequency of light = 4.48 × 10¹⁴ Hz

Energy of photon = ?

Solution:

Formula:

E = h.f

E = energy of photon

h = planck's constant

f = frequency

E = h.f

E = 6.63 × 10⁻³⁴ Kg.m² /s × 4.48 × 10¹⁴ s⁻¹

E = 29.7× 10⁻²⁰ Kg.m²/s²

Kg.m²/s² = j

E = 29.7× 10⁻²⁰  j

3 0
2 years ago
The model below represents a nuclear reaction. Atom 1 is present before the reaction and Atom 2 and Atom 3 are produced after th
belka [17]
The right answer for the question that is being asked and shown above is that: "d. does not produce energy in nuclear power plants." The model most likely represents a reaction which d. does not produce energy in nuclear power plants<span>
</span>
7 0
2 years ago
Read 2 more answers
Don’t know how to do #2 someone help
telo118 [61]
I think the answer is a.
5 0
3 years ago
Read 2 more answers
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