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kolezko [41]
3 years ago
8

When K2Cr2O7 is cooled from 80oC to 20oC, how much solute will precipitate out of the solution?

Chemistry
1 answer:
Setler [38]3 years ago
3 0

Answer:

The amswer to the question is A

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The density of honey is 1.42 g/mL. If you poured honey into a glass of water, would it sink to the bottom or float on top? Expla
m_a_m_a [10]

Answer:

The honey would sink to the bottom

Explanation:

A simple interpretation of Archimedes' principle is that, in water, the bodys with density lower than that of water will float on top of the water (That is, density <1g/mL). In the other way, a body with density higher than that of water will sink to the bottom.

As density of honey is higher than density of water:

<h3>The honey would sink to the bottom</h3>
3 0
3 years ago
A pure, liquid substance is held over a heat source. Slowly, all of the liquid evaporates and transforms into a gas, which is ca
alekssr [168]

Answer:

Its D. have the same compostion

Explanation:

Dont haveaan explation i got it wrong and the real answer popped up

8 0
3 years ago
List the following carboxylic acid derivatives in decreasing order of reactivity in nucleophilic acyl substitution reactions: ac
kondor19780726 [428]

Answer:

<h2>acetyl chloride > acetic anhydride > methyl acetate > acetamide</h2>

Explanation:

Such kind of substitution reaction in which nucleophiles and the acyl compound interact is known as nucleophilic acyl substitution reaction. In this reaction, the interaction between carbonyl compounds and the nucleophile takes place by addition reaction. The reactivity of the acyl compound is based on the condition of the leaving group that is related to the acidity of the compounds. So the decreasing order of reactivity of the acyl compounds is, acetyl chloride > acetic anhydride > methyl acetate > acetamide.

5 0
4 years ago
How many grams of a stock solution that is 87.5 percent H2SO4 by mass would be needed to make 275 grams of a 55.0 percent by mas
Mandarinka [93]
<span>We're diluting the first solution to make the second solution. This means both solutions will contain the same amount of H2SO4 (it's the concentration of it that changes). If you look at it this way, it's easy to find the unknown mass. Call this unknown mass m. m * 0.875 = 275 g * 0.55 --> m = 173 g What I'm saying here is 87.5% of the mass of the first solution needs to be the same as 55% of the mass of the second solution, because you're using the same amount of H2SO4 in both.

Please mark this brainliest! 


</span>
3 0
3 years ago
Describe a covalent bond?
Natasha2012 [34]
A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
7 0
3 years ago
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