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3 years ago

Why is water less dense as a solid than a liquid? In ecological terms, why is this of particular importance?

Chemistry

1 answer:

Georgia [21]3 years ago

3 0

<span>Persamaan setara pada reaksi besi dengan asam klorida membentuk besi (II) klorida dan gas hidrogen </span>

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Please help need a 100

Triss [41]

B directly; inversely

Pressure and volume have an inverse relationship (when one increases the other increases) while volume and temperature are direct (if one increases so does the other)

Note: these relationships are only true if other factors are constant such as the temperature, and amount (in moles).

3 0

4 years ago

How many grams and what is the limiting reactent?

gayaneshka [121]

Hello!

1) What is the limiting reactant?

The chemical equation for this reaction is:

2Al(OH)₃ → Al₂O₃ + 3H₂O

The Limiting Reactant is the one that is in the lowest amount in the reaction and determines how many moles are produced. You can see that in this chemical equation there is only one reactant since this reaction is a decomposition reaction. So, the limiting reactant is Al(OH)₃.

2) How many grams of water are produced?

The chemical equation for this reaction is:

2Al(OH)₃ → Al₂O₃ + 3H₂O

So, we are going to use the following conversion factor to go from grams of Al(OH)₃ to grams of water:

$17,8 g Al(OH)_3* \frac{1 mol Al(OH)_3}{78 g Al(OH)_3}* \frac{3 moles H_2O}{2 moles Al(OH)_3}* \frac{18,015 g H_2O}{1 mol H_2O} \\ =6,17 g H_2O$

So, 6,17 grams of Water are produced.

Have a nice day!

5 0

4 years ago

How would you figure the number of neutrons in an atom?

Sonbull [250]

<span>Mass Number = (Atomic Number) + (Number of Neutrons) so you solve for the Number of Neutrons and you get:
Number of Neutrons = (Mass number) - (Atomic Number)

Mass Number equals protons plus neutrons, round atomic weight to nearest whole number
Atomic Number equals number of Protons</span>

3 0

4 years ago

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To make a 450g solution with a mass by mass concentration of 7%, how much salt and water do you need to mix?

Yuri [45]

Explanation:

The given data is:

The mass% of a solution is 7.

Mass of solution =450g

The mass of salt required can be calculated as shown below:

$mass percent =(mass of solute/mass of solution )x100\\$

Substitute the given values in this formula to get the mass of solute that is salt:

$mass percent =(mass of solute/mass of solution )x100\\\\7=\frac{mass of salt}{450g} x100\\=>mass of salt=7x450g /100\\mass of salt=31.5g$

Mass of salt =31.5g

Mass of solvent that is water = 450g-31.5g=418.5g

4 0

3 years ago

What are the basic component of the Environment

stira [4]

Explanation:

COMPONENTS OF ENVIRONMENT

Environment mainly consists of atmosphere, hydrosphere, lithosphere and biosphere. But it can be roughly divided into two types such as (a) Micro environment and (b) Macro environment. (a) Micro environment refers to the immediate local surrounding of the organism.

8 0

3 years ago

Read 2 more answers