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sergey [27]
4 years ago
5

Robert has a very detailed model of the solar system where each planet is made out of granite rock. Since his little sister real

ly liked the model, he spent two weeks in his dad's workshop building her a Styrofoam copy. When he picked up the models to take them back inside the house, which physical property would he immediately notice upon picking them up?
Chemistry
1 answer:
Ganezh [65]4 years ago
6 0

Density

Explanation:

The density difference between the granite and styrofoam model will be very obvious to anyone.

Density is the amount of substance(mass) contained per unit unit volume.

Density    =    \frac{mass }{volume}

Granite is more denser than the styrofoam. The styrofoam will feel lighter compared to the granite.

It would be easier to carry and move about.

Learn more:

Density brainly.com/question/8441651

#learnwithBrainly

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2Al(s) + 3CuSO4(aq) --> Al2(SO4)3(aq) + 3Cu(s) 2. According to the reaction in question 1 above, how many grams of solid copp
Harrizon [31]

Answer:

5.73 g of solid copper, can be  theoretically produced in this reaction.

Explanation:

We start from the begining with the balanced equation:

2Al (s) + 3CuSO₄ (aq) → Al₂(SO₄)₃ (aq)  +  3Cu (s)

To determine the limiting reactant we need to know the moles of each.

2.2 g / 26.98 g/mol = 0.0815 moles of Al

14.4 g / 159.6 g/mol = 0.0902 moles of copper (II) sulfate.

Ratio is 2:3. Let's find out the limtiing reactant,

2 moles of Al react to 3 moles of copper (II) sulfate

Then 0.0815 moles of Al, may react to (0.0815 . 3) / 2 = 0.122 moles of salt.

We only have 0.0902 moles of sulfate and we need 0.122 moles to complete the reaction, as the sulfate we have, is not enough, the salt is the limting reagent. We use this to determine the solid copper that can be theoretically produced.

This ratio is 3:3, so If we have 0.0902 moles of copper (II) sulfate, we may produce 0.0902 moles of solid copper.

Let's conver the moles to mass → 0.0902 mol . 63.5 g/mol = 5.73 g

4 0
3 years ago
Place the parts of the human circulatory system in order from highest to lowest degree of internal organization.
Softa [21]

Answer:

cell tissue organ and system

8 0
3 years ago
Read 2 more answers
A standard room temperature and pressure, most of the elements on the periodic table are
Maslowich

Answer:

Solids

Explanation:

At standard room temperature and pressure, most of the elements are solids.

Just a few of the elements are liquids and gases at this temperature.

The periodic table is made up of metals, metalloids and non-metals. Most of these substances are actually solid.

Some non-metals are gaseous at standard room temperature.

8 0
3 years ago
O que acontece com a perspiração celular se, pro algum motivo, uma pessoa foi impedida de executar a respiração pulmonar?
12345 [234]

Answer:

I wish I spoke this languge.

Explanation:

3 0
3 years ago
Calculate the number of moles of sodium oxide that should be produced with 6.50 g of sodium react with oxygen gas
mars1129 [50]
First of all write a balanced equation.
4Na + O2 -> 2Na2O
You are starting with a mass of sodium. You need to use sodium’s molar mass. Take this quantity times mole to mole ratio between sodium and sodium oxide to get moles of sodium oxide produced.
.141 moles of sodium oxide produced
4 0
3 years ago
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