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3 years ago

The particles in the most solids are arranged in a regular pattern.

Chemistry

1 answer:

borishaifa [10]3 years ago

5 0

True because solids are colder so the particles are in a fixed pattern that join them into a regular pattern

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Matter is anything that has mass and takes up space. Which units of measurement can you use to describe these two properties?

elena-s [515]

Answer:

Explanation:

The SI unit for density is the kilogram per cubic meter (kg/m3 ).

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3 years ago

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Which one of the following would you expect to dissolve in water? limonene sucrose oil atmospheric oxygen none of the above

sdas [7]

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3 years ago

a piece of food is burned in a calorimeter that contains 200.0g of water. If the temperature of the water rose from 65.0°C to 83

Flauer [41]

Answer: 15062.4 Joules

Explanation:

The quantity of heat energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of food = 200.0g

C = 4.184 j/g°C

Φ = (Final temperature - Initial temperature)

= 83.0°C - 65.0°C = 18°C

Then, Q = MCΦ

Q = 200.0g x 4.184 j/g°C x 18°C

Q = 15062.4 J

Thus, 15062.4 joules of heat energy was contained in the food.

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3 years ago

What observations can you make about this group of people? Name one inference you can make from your observations.

Vlad1618 [11]

Answer:

What group of people ay?

Maybe look at their differences in appearance: height, size, weight, skin color, clothing choice?

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3 years ago

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When elemental boron, B, is burned in oxygen gas, the product is diboron trioxide. If the diboron trioxide is then reacted with

zalisa [80]

<u>Answer:</u> The chemical equation is written below.

<u>Explanation:</u>

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

The chemical equation for the reaction of elemental boron and oxygen gas follows:

$4B+3O_2\rightarrow 2B_2O_3$

By Stoichiometry of the reaction:

4 moles of elemental boron reacts with 3 moles of oxygen gas to produce 2 moles of diboron trioxide.

The chemical equation for the reaction of diboron trioxide and water follows:

$B_2O_3+3H_2O\rightarrow 2H_3BO_3$

By Stoichiometry of the reaction:

1 mole of diboron trixoide reacts with 3 moles of water to produce 2 moles of boric acid.

Hence, the chemical equations are written above.

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3 years ago