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Komok [63]
3 years ago
6

Which of the following elements is commonly found in the Earth's crust, living matter, oceans, and atmosphere? hydrogen , neon g

old or bromine?
Chemistry
1 answer:
Svetlanka [38]3 years ago
4 0

Answer: hydrogen

Explanation: hydrogen gas is a major component of water which occupies a large portion of the Earth's atmosphere

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What is the measurement 222.008 mm rounded off to four significant digits?
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That would be 222.0 mm to 4 sig figs

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Please help me with this quick!!
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Need help on this question asap please
3241004551 [841]

Answer:

The correct answer is - 14.

Explanation:

In the given molecular formula of the aluminum sulphite which is Al2(SO3)3, this molecular formula there different type of elements are bonded together to form this compound each element has a specific number of atoms present. This compound has three elements that are aluminum, sulfur, and oxygen and the atoms are present are:

Al = 2 atoms represented by subscript

S = 3 atoms represented as whole subscripts of sulfite

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Thus, total number of atoms are 2+3+9 = 14

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2 years ago
Which of the following methods for increasing the rate of chemical reaction increases the effectiveness of the interactions betw
denpristay [2]

Answer:

Increasing the surface area of the reactants

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An increase in surface area of the reactant will always cause an increase in the rate of reaction. This is so because, an increase in the surface area of the reactant will cause the reactant particles to collide effectively thereby bringing about an increase in the reaction rate.

Collision theory suggests that for a reaction to occur, the reactant particles must collide with the right orientation. As the surface area of the reactants are increased, the reactants particles collide more with the right orientation bringing about definite increase in the rate of reaction.

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