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3 years ago

7

What distinguishes compounds from mixtures?

1 answer:

dexar [7]3 years ago

3 0

Answer:

There's a very small difference between the two...a compound is when you mix several elements to create a whole new one. A mixture is when you mix several elements together, but instead of it creating a completely different compound, it's simply just a few elements mixed together.

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Explain in a short sentence how you can tell a reaction is a decomposition reaction.

mr Goodwill [35]

Answer: A decomposition reaction occurs when one reactant breaks down into two or more products.

Mark me as brainilist pls

3 0

2 years ago

A nugget of gold has a mass of 28 grams and a volume of 1.45 cubic centimeters. What is the density?

Travka [436]

Answer:

0.01931034

Explanation:

Steps:

ρ = m/v

=

28 gram

1.45 cubic meter

= 19.310344827586 gram/cubic meter

= 0.019310344827586 kilogram/cubic meter

7 0

2 years ago

4.41 g of propane gas (C3H8) is injected into a bomb calorimeter and ignited with excess oxygen, according to the reaction below

gayaneshka [121]

Answer : The heat of the reaction is -221.6 kJ

Explanation :

Heat released by the reaction = Heat absorbed by the calorimeter

$q_{rxn}=-q_{cal}$

$q_{cal}=c_{cal}\times \Delta T$

where,

$q_{rxn}$ = heat released by the reaction = ?

$q_{cal}$ = heat absorbed by the calorimeter

$c_{cal}$ = specific heat of calorimeter = $97.1kJ/^oC=97100J/^oC$

$\Delta T$ = change in temperature = $(T_{final}-T_{initial})=(27.282-25.000)=2.282^oC$

Now put all the given values in the above formula, we get:

$q_{cal}=(97100J/^oC)\times (2.282^oC)$

$q_{cal}=221582.2J=221.6kJ$

As, $q_{rxn}=-q_{cal}$

So, $q_{rxn}=-221.6kJ$

Thus, the heat of the reaction is -221.6 kJ

6 0

3 years ago

The particles remain seperate and don’t combine? What is this a mixture or a solution?

djyliett [7]

It is actually a Colloid, which means it will never mix and settle.<span />

3 0

3 years ago

How much is the oxygen valency?

Marina CMI [18]

The oxygen valency is 2

4 0

2 years ago