CHEMISTRY MIDDLE SCHOOL

Please help!! I’ll mark u brainly What type of reaction occurs during photosynthesis?
O
A. Oxidation-reduction
O
B. Decomposition
O
C. Combustion
O
D. Double-displacement

Answers

Answer 1
Answer:

Answer:

Oxidation Reduction

Explanation:

The electrons in the water are oxidized or reduced and the CO2 levels are reduced or gaining electrons.
Answer 2
Answer:

Answer:

Oxidation-reduction

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Which part of the human ear is part of the inner ear? A)cochlea
B)oval window
C)ear canal
D)Hammer

Answers

Cochlea is present in inner ear !!

So go with A !!
if you need more info on that ; comment !!

Answer: cochlea


The cochlea is responsible for turning sound waves which is what makes you hear.

Heliocentric theory:was initially rejected
was supported by Galileo
stated that the earth rotated around the sun
all of the above

Answers

All of th above support the heliocentric theory.

Answer:

It is all of the above.

Explanation:

The Heliocentric theory was indeed rejected by many people. Most people were religious and the church believed in the Geocentric theory.

Galileo did indeed support the the theory by using his telescope and observed the moons of Jupiter and saw how they all orbited Jupiter which contributed to the Heliocentric theory.

The Heliocentric theory did believe that the Earth rotated around our sun.

What is the optimal level of fluoride in water?

Answers

Answer:

The agency's recommended ratio of fluoride to water, newly calibrated at 0.7 parts per million, results from years of scientifically rigorous analysis of the amount of fluoride people receive from all sources.

How many atoms are in Na2CrO4

Answers

We have that for the Question "how many atoms are in Na2CrO4" it can be said that The total number of atoms is

  • X=7 atoms

From the question we are told

how many atoms are in Na2CrO4

Generally

In identifying the  atoms are in Na2CrO4 we must first look closely at the compound   Na2CrO4

We have

Na=1

Cr=2

O=4

Therefore

The total number of atoms is

X=1+2+4

X=7 atoms

For more information on this visit

brainly.com/question/23379286
The formula shows the number of each type of atom in the molecule. There are 2 atoms of sodium, one atom of chromium and four atoms of oxygen, being a total number of 7 atoms.

why the total mass of the products would be less than the total weight of the reactant after a chemical reaction?

Answers

The best explanation would be that Gases were released during the Chemical reaction, causing a loss of Mass. 

An atom has 8 electrons and a mass of 17. What would the correct symbol be?A. 17gF
B. 90
C. 25,61
D. 17,0

Answers

I believe the answer is A.
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