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Leno4ka [110]
3 years ago
11

Which of the following is true about technology and science

Chemistry
1 answer:
galben [10]3 years ago
4 0

Answer:

car

Explanation:

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A lab experiment shows: merge a litmus paper in a
ddd [48]

Answer:

2.

Explanation:

When you put the paper in a solution, it will turn blue if it is basic, or red if it is acidic. If it does not change color, it is fairly neutral.

6 0
3 years ago
Which best describes how a fetus exchanges gases while in the womb?
vagabundo [1.1K]

Answer:

C. Gas exchange occurs through the placenta.

Explanation:

The fetus is a developing baby in the womb or uterus. The fetus is incapable of performing certain life processes itself and hence, depends on the mother to do them. One of these processes is GAS EXCHANGE. Gas exchange occurs in the fetus via a structure called PLACENTA.

Placenta is a structure that forms in the uterus during pregnancy. It helps the developing fetus supply oxygen and nutrients from the mother and also remove wastes from the fetus back to the mother. The oxygen is taken into the fetus via the PLACENTA while the carbon dioxide (waste product of respiration) is removed via the PLACENTA. Hence, Gas exchange occurs through the placenta.

5 0
3 years ago
TILEF
torisob [31]

Answer:

Na

Explanation:

sodium has mass number 23 and atomic number 11 so number of protons =number of electrons =atomic number which is 11 and number of neutrons=mass number-number of protons =23-11=12

7 0
2 years ago
Scientists examine fossils from three different animals. They determine that all three animals share similar structures and
mezya [45]

Answer:

C,B,A

Explanation:

C has the most similar structure

B has the second most similar structure

A has the least similair structure

6 0
2 years ago
Na-23 has 12 neutrons. What is it’s atomic number?
erastovalidia [21]

Answer:

11

Explanation:

The atomic number = number of protons. The mass number (23) = sum of number of neutrons and protons. Since you know the mass number is 23 and it has 12 neutrons, 23-12 gives you 11 protons, so its atomic number is 11.

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6 0
2 years ago
Read 2 more answers
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