CHEMISTRY MIDDLE SCHOOL

In a chemical reaction, ... interact to form ... a. molecules, atoms
b. products, reactants
c. elements, atoms
d. reactants, products

Answers

Answer 1
Answer:

The answer is letter D. Reactants, Products

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Describe what type of electron transfer happens between these two atoms.

Which of the following describes electron sharing between two oxygen atoms.A)Each Oxygen shares 6 electrons with the other
B)Each Oxygen shares 2 electrons with the other
C)Each Oxygen shares 8 electrons with the other
D)Each Oxygen shares 1 electrons with the other

Answers

Option B because the electron sharing between two oxygen atoms would be that each oxygen shares two electrons with the other.

In a college there are exactly 3000 students, exactly 60% are male. What is the number of female students

Answers

Answer:

1800

Explanation:

3000x.60=1800

What would happen if there no decomposers

Answers

producers would not have enough nutrients .
all the other categories above the decomposers would die off, the decomposers help get rid of the dead organisms and if there were no decomposers then there would be dead organisms and bones everywhere.

2C4H10 + 13O2 -----> 8CO2 + 10H2OIf 3000 grams of C4H10 react according to this equation, and the actual yield for water is a mass of 1300 grams, what is the percent yield?

Answers

Answer:

27·92 %

Explanation:

Given chemical equation is

2C4H10 + 13O2 -----> 8CO2 + 10H2O

So according to the above balanced chemical equation for 2 moles of C4H10, 10 moles of water is produced

Molecular weight of C4H10 is 58 g

Molecular weight of water is 18 g

So for 116 g of C4H10, 180 g of water is produced and therefore for 1 g of C4H10 (180 ÷ 116) g of water is produced

∴ For 1 g of C4H10 1·552 g of water is produced

For 3000 g of C4H10, (3000 × 1·552) g of water is produced

∴ Number of grams of water produced for 3000 g of C4H10 is 4656 g

Percent yield =((experimental amount) ÷ (theoretical amount)) × 100

Here experimental amount is 4656 g

theoretical amount is 1300 g

∴ Percent yield = (1300 ÷ 4656) × 100 = 27·92 %

∴ Percent yield = 27·92 %

How can you get rock salt to dissolve in water quickly?

Answers

You can increase the heat, add more water, or by mixing/shaking.

Read the following selection from the section "What Is Intubation?"Having a tube down your throat isn't exactly pleasant because it affects a patient's ability to talk
or eat. But it's important for getting the right amount of air into the lungs.
Which answer choice BEST supports the idea that intubation is a necessary part of ventilator treatment?
(A) But when the lungs fill up with fluid or become highly inflamed, the lungs can't expand enough, Lutchen
says.
(B) This actively pushes air into the lungs and can keep the levels of oxygen and carbon dioxide in the
blood close to normal.
(C) If the ventilator simply blew into a person's mouth, the air might expand their cheeks or leak out of their
noes instead of going into the lungs, he says.
(D) When the lungs are damaged, the millions of balloons take in oxygen and release carbon dioxide
differently than when they are healthy, he says.

Answers

Answer:

It may be required when respiratory distress or airway integrity cannot be achieved or maintained for any reason.

(B) This actively pushes air into the lungs and can keep the levels of oxygen and carbon dioxide in the

blood close to normal.

Explanation:
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