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ira [324]
3 years ago
6

PLEASE HELP ASAP‼️‼️ A B C D

Chemistry
1 answer:
ss7ja [257]3 years ago
6 0

Answer:

Hey mate......

Explanation:

This is ur answer......

<h2>Option C is the correct answer.....</h2>

<em>molecules in liquids are weaker than solids but stronger than gases......</em>

Hope it helps!

Brainliest pls!

Follow me! :)

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When 16.3 g of magnesium and 4.52 g of oxygen gas react, how many grams of magnesium oxide will be formed? Identify the limiting
Tanzania [10]

Answer:

22.77 g.

he limiting reactant is O₂, and the excess reactant is Mg.

Explanation:

  • From the balanced reaction:

<em>Mg + 1/2O₂ → MgO,</em>

1.0 mole of Mg reacts with 0.5 mole of oxygen to produce 1.0 mole of MgO.

  • We need to calculate the no. of moles of (16.3 g) of Mg and (4.52 g) of oxygen:

no. of moles of Mg = mass/molar mass = (16.3 g)/(24.3 g/mol) = 0.6708 mol.

no. of moles of O₂ = mass/molar mass = (4.52 g)/(16.0 g/mol) = 0.2825 mol.

So. 0.565 mol of Mg reacts completely with (0.2825 mol) of O₂.

<em>∴ The limiting reactant is O₂, and the excess reactant is Mg (0.6708 - 0.565 = 0.1058 mol).</em>

<u><em>Using cross multiplication:</em></u>

1.0 mole of Mg produce → 1.0 mol of MgO.

∴ 0.565 mol of Mg produce → <em>0.565 mol of MgO.</em>

<em>∴ The amount of MgO produced = no. of moles x molar mass </em>= (0.565 mol)(40.3 g/mol) = <em>22.77 g.</em>

8 0
3 years ago
Read 2 more answers
What happens to the total energy in a closed system?
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Answer:

I think the answer might be A

Explanation:

In a closed system, the total energy always remains constant.

hope this helps:)

5 0
3 years ago
Read 2 more answers
2. What will you change (the independent variable) in each test?
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Answer:the other vaiabable

Explanation:

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4 years ago
The octane rating of gasoline is a measure of the resistance to premature ignition, also known as engine knock. It is based on c
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1. Complete structure

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3 years ago
Match each of the following descriptions to thecorrect element listed
Slav-nsk [51]

Answer: Please see explanation for answer

Explanation:Matching the  descriptions to the correct element listed gives

Element Group Name Group No Metal/ Nonmetal/ Metalloid Description

Neon    Noble gases       18           Non metal Colorless, tasteless, and        odorless gas, unreactive, nonconductive.

Bromine      Halogens   17          Non metal Not found as a free element (uncombined) in nature, reddish-brown liquid that vaporizes readily at room temperature to a red gas with a strong disagreeable odor.

Beryllium       Alklaline earth metal  2    Metal  Silvery-white, ductile, malleable, conductive solid with a high melting point for this type of element

Platinum     Platimum group metals  10   Metal      Silvery white, relatively soft, low density, conductive solid that is not found as a free element in nature but commonly found combined in alloys with copper or nickel

Potassium   Alkali Metals   1   Metal  Soft, easily cut with a knife to expose a silvery surface that rapidly oxidizes in air; never found uncombined in nature

Silicon    Carbon family     1`4  Metalloid   Metallic luster and grayish solid, very common in rocks and gemstones such as amethyst and opal, semiconductor

Sulfur   Calcogens      16  Non metal  Pale yellow, odorless, brittle solid at room temperature, nonconductor

4 0
3 years ago
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