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BabaBlast [244]
3 years ago
12

Iron in rock combining with oxygen to form hematite

Chemistry
1 answer:
blondinia [14]3 years ago
4 0
The answer is a. Chemical change.
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Which statements describe both male and female reproductive systems? Select three options
worty [1.4K]

Answer:

A:The reproductive system produces hormones.

B:The reproductive system transports reproductive cells.

C:The reproductive system produces reproductive cells.

Explanation:

A:The reproductive system produces hormones. : The reproductive organs ovaries in females and testes in males produces hormones. The ovaries produce estrogen and progesterone and testes produce testosterone.

B:The reproductive system transports reproductive cells. : The ovaries in females transfers an egg into the fallopian tube and testes in males secrete sperms at the time of copulation the fertilization of egg and sperm leads to the development of zygote the precursor of new life.

C:The reproductive system produces reproductive cells.: The ovaries undergo oogenesis and in testes spermatogenesis takes place to develop egg and sperms respectively.

Explanation:

7 0
3 years ago
How many molecules of methane gas (CH4) are in 32.1 grams of methane
bixtya [17]

Answer:

There are 1.8021⋅1024 molecules of CH4 in 48 grams of CH4 .

Explanation:

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4 0
3 years ago
Answer this for me please I got homework from science and it's confusing me
viktelen [127]

type the question please. The picture is to hard to see


8 0
4 years ago
How many unpaired electrons does calcium have? You may need to draw the orbital filling diagram for the last sublevel that conta
beks73 [17]

Answer:

0

Explanation:

Ca has 20 electrons

6 0
3 years ago
how many moles of water (H2O) would be produced from the reaction of 3.25 moles of hydrochloric acid (HCL) reacting with excess
lbvjy [14]

Answer:

3.25 moles of H2O

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2HCl + Ca(OH)2 —> CaCl2 +2H2O

Now, we can obtain the number of mole H2O produced from the reaction as follow:

From the balanced equation above,

2 moles of HCl reacted to produce 2 moles of H2O.

Therefore, 3.25 moles of HCl will also react to produce 3.25 moles of H2O.

Therefore, 3.25 moles of H2O were produced from the reaction.

8 0
4 years ago
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