When iron rusts in air, iron (III) oxide is produced. How many moles of oxygen react with 2.4 mol of iron in the rusting reaction shown below ?

Answers

Answer 1

Answer: the answer is 2.4*3/2 = 3.6 mol o2

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Which of the following is represented in the highest percentage by volume in dry air?A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen

Answers

Answer is: C. nitrogen.

Together, nitrogen (N₂) and oxygen (O₂) by volume account for 99.03% volume of the gases composing the dry air in the lower atmosphere.

Volume of nitrogen in air is 78.08%.

Volume of oxygen in air is 20.95%.

Together: 78.08% + 20.95% = 99.03%.

This gases can be separated by fractional distillation of liquefied air.

Physical activity and exercise typically lead to __________.a. increased stress
b. depression
c. higher energy levels
d. reduced quality of life

Answers

The answer is c - physical activity and exercise typically lead to higher energy levels. The endorphins and hormones released during periods of high activity actually help to combat stress and depression linked to a depletion in serotonin, and therefore can only increase the quality of life. The other possible answers to this question are therefore all incorrect.

the answer is c i just took the test

The symbol for gold is
a. AU.
b. G.
c. Go.
d. Au.

Answers

D. Au

Every other answer doesn't represent any element.

The formula HCl stands for ____.a. hydrochloric acid
b. the hydronium ion
c. sodium hydroxide
d. hydrogen peroxide

Answers

HCl :

hydrochloric acid

answer A

hope this helps!

How is it possible for compound to have both ionic and covalent bonds

Answers

And ionic is when a nonmetal and a metal compound bond together and a covalent is when 2 nonmetals bond together
"K2SO4 is an example of a compound that contains both ionic and covalent bonds... the sulfate ion is held together with
covalent bonds... and the potassium ions are ionically bonded to the sulfate ions. Or let's say we have a group of elements that are covalently bonded together, but still have net positive or negative charge... like PO4, OH, SO4, NH4, NO3... and these ions are both cations and anions and can have a plethora of charges.

For example... (NH4)3PO4 can be dissociated but the ions will remain as a group. So when this dissociates... we will get three ammonium and one phosphate ion. But then, the oxygen will not dissociate from the phosphorous any more than the hydrogen will dissociate from the nitrogen."

WHen neither atom attracts or repels the shared electon it can be both.

During which step in the Can Crush Lab did the air pressure outside the can become greater than the pressure inside the can?. . A.The can was filled nearly to the top with water.. B.The can was placed on the hot stove burner for several minutes.. C.The can was removed from the hot oven burner.. D.The can was placed upside-down in the water-filled pan.

Answers

the step in which the air pressure outside the can become greater than the pressure inside the can is : A. The can was filled nearly to the top with water

The next step is to cool the can suddenly by inverting the water and cause water to vapor in the can to condense

hope this helps

The answer is D. Heating the air in the can reduces the air pressure in the can. When the can is inverted in a pan with cold water, the can collapses inwards. This is because the cold water cooled the air around the outside of the can. Cold air has a higher pressure that hot air because it’s denser. Became. The higher air pressure outside presses on the can walls and force them inwards.

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Which material is not a form of pyroclastic material?A- volcanic dustB- volcanic dirtC- volcanic bombsD- lapilli