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AysviL [449]
2 years ago
15

3.04 Quiz: Chemical Reactions Please help me

Chemistry
1 answer:
coldgirl [10]2 years ago
5 0

most of them are chemical because they could not go back to there original form like if you cut paper that is physical if you burn the paper that would be chemical because it would not longer be paper

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How many milliliters of 0.0896M LiOH are required to titrate 25.0 mL of 0.0759M HBr to the equivalence point?
slavikrds [6]

Answer:

V_{LiOH}=21.8mL

Explanation:

Hello,

In this case, during titration at the equivalence point, we find that the moles of the base equals the moles of the acid:

n_{LiOH}=n_{HBr}

That it terms of molarities and volumes we have:

M_{LiOH}V_{LiOH}=M_{HBr}V_{HBr}

Next, solving for the volume of lithium hydroxide we obtain:

V_{LiOH}=\frac{M_{HBr}V_{HBr}}{M_{LiOH}} =\frac{0.0759M*25.0mL}{0.0896M} \\\\V_{LiOH}=21.8mL

Best regards.

8 0
2 years ago
Determine the mass of the H2CO3 produced.
FrozenT [24]

Answer:

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Explanation:

7 0
3 years ago
When propane (C3H8) is burned in air (O2), it completely combusts and produces water (H2O) and carbon dioxide (CO2). How many mo
Damm [24]

Answer:

20 mol

Explanation:

First, balance the chemical reaction

C3H8 + 5O2 --> 4H2O + 3CO2

Using the mole ratio, we can multiply the moles of propane by 4 to find the moles of H2O.

5 × 4= 20

20 mol

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3 years ago
I will give the brainliest for who answer this questio but no guessing
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IVA: nonmetal/other metals VIIA:halogens VIII: Nobel Gases
8 0
3 years ago
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Plants and animals can build up or break down rock by increasing weathering, erosion, and
alexgriva [62]

Answer:

false

Explanation:

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

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