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3 years ago

If a 91.3 g piece of aluminum has a density of 2.7 g/cm3, what is its volume in cubic centimeters?

Chemistry

1 answer:

Alex_Xolod [135]3 years ago

3 0

Answer:

<h2>The answer is 34 cm³</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question

mass of aluminum = 91.8 g

density = 2.7 g/cm³

It's volume is

$volume = \frac{91.8}{2.7} \\$

We have the final answer as

Hope this helps you

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how does increasing concentration/ temperature/ surface area affect the yield of products in a chemical reaction (not reversible

egoroff_w [7]

Answer:
<span>Increasing concentration, temperature and surface area will increase the yield of products.

Explanation:
Concentration:
Increase in concentration of reactants will increase the number of reactants per unit volume. Therefore, the probability of collisions will increase hence, it will result in the increase in yield.

Temperature:
Increase in temperature increases the kinetic energy of reactants. Therefore, the increase in velocity of reactants results in the collisions with high energy. It makes it feasible for reactants to attain the optimum energy (activation energy) to convert into products with good yield.

Surface Area:
The reactants in grinded / powder form reacts fast as compared to solid form. In fact, grinding results in increase of the surface area of reactants. Greater surface area increases the probability of reactants to colloid. Hence, increases the yield.</span>

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3 years ago

Is the formula FE a element, compound, or molecule

andrezito [222]

FE is iron
iron is an element
so the answer is element 0-0

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3 years ago

3. If an ion contains 10 electrons,<br> 12 protons, and 13 neutrons, what is<br> the ion's charge?

storchak [24]

Answer:

The charge of the ion is 2+.

Explanation:

The amount of neutrons is extra information. You just need to compare the amount of electrons to the amount of protons for the ion's charge.

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4 years ago

Why does a split petrol forms a slick on top of water

slavikrds [6]

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3 years ago

Given the following information:

Katyanochek1 [597]

Step by Step Explanation

From the question,
the dimensions of the tank are;

L = 30 cm, way =0.075m and H = 15 cm

The density of water is given as
$D = 1g {cm}^{ - 3}$

The unit of density given in the question means that the mass of the water is in grams and the volume should also be in
${cm}^{3}$

To find the volume of the water, we first convert the units of dimensions given in inches and metres to centimetres

$1 inch = 2.54 cm$

This implies that ,

$H=15 inches=15×2.54cm=38.1cm$

Also,

$100cm=1m$

This implies that,
$w= \frac{0.075}{100 } = 7.5 \times {10}^{ - 4} cm$

Now, the volume of water in the tank can hold, can be found from the relation;

$V=L\times W\times H$

This implies that,

$v = 30cm \times (7.5 \times {10}^{ - 4} )cm \times 38.1cm$

$v = 0.857 {cm}^{3} \: to \: 3 \: d.p$

Finally, we can calculate the mass of the water from the relation given;

$D=\frac{M}{V}$

This in implies that

$1g {cm}^{ - 3} = \frac{m}{0.857 {cm}^{3} }$
$m = 1g {cm}^{ - 3} \times 0.857 {cm}^{3}$
$m = 0.857g$

Hence the fish tank can hold 0.857g water.

4 0

3 years ago

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