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lys-0071 [83]
4 years ago
9

Chemical changes make new materials and tend not to be readily reserved. Physical changes do not make new materials and tend to

be readily reserved. Which of the following is a chemical change?
A. the evaporation of a rain puddle

B. frying an egg

C. ice cracking a milk bottle

D. melting butter
Chemistry
2 answers:
iogann1982 [59]4 years ago
8 0
<span>Chemical changes result in the formation of new substances, and the changes that occur cannot be reversed (at least without other chemical changes). The heat from frying an egg causes the egg's protein to change permanently in texture and in appearance through a process called denaturing.

The answer is B. Frying an egg.
</span>
Bogdan [553]4 years ago
7 0
The answer is B. Frying an egg.
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A gas has a volume of 590 ml at a temperature of -55.0°C. What volume will the gas occupy at 30.0°C?
Alexeev081 [22]

819 ml is the volume the gas will occupy at 30.0°C.

Explanation:

Data given:

initial volume of the gas V1 = 590 ml

initial temperature of the gas T1 = -55 degrees OR 218.15

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final temperature of the gas T2 = 30 degrees OR 303.15

Charles' Law equation is used to calculate the volume of gas at 30 degrees from the data given in the question.

\frac{V1}{T1}= \frac{V2}{T2}

V2 = \frac{V1T2}{T1}

V2 = \frac{590 X 303.15}{218.15}

V2 = 819 ml

The final volume of the gas would be 819 ml.

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4 years ago
What volume (in mL ) of 0.200   M NaOH do we need to titrate 40.00 mL of 0.140   M HBr to the equivalence point?
Ugo [173]
NaOH + HBr =⇒ NaBr + H2O

35.0 ml HBr x 1 liter/1000 mL x 0.140 moles HBr/ liter = 0.0049 moles HBr

0.0049 moles HBr x 1mole NaOH/1mole HBr = 0.0049 moles HBr

0.0049 moles HBr x 1 liter NaOH/0.200 moles NaOH x 1000 mL/1liter= 24.5 mL NaOH
7 0
3 years ago
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Water is considered a polar solvent due to attractive forces known as hydrogen bonds. a hydrogen bond is:_________
muminat

Because of the attraction forces known as hydrogen bonding, water is referred to as a polar solvent. An attraction between molecules known as a hydrogen bond occurs when partially positive hydrogen atoms are drawn to partially negative F, O, or N atoms.

<h3>What is a hydrogen bond?</h3>

A hydrogen bond (or H-bond) is a strong electrostatic attraction between an electronegative atom holding a lone pair of electrons, known as the hydrogen bond acceptor, and a hydrogen (H) atom that is covalently attached to a more electronegative "donor" atom or group.

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When a hydrogen atom bonds with an electronegative atom, powerful intermolecular forces called hydrogen bonds are produced. The hydrogen bond acceptor's electronegativity will rise, resulting in a stronger hydrogen bond.

To know more about Hydrogen Bond visit:

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4 0
2 years ago
Entropy is the tax we pay for borrowing nature's power.discuss​
Alexxandr [17]

Answer:

Explanation:

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Practice by predicting what would happen if the following underwent beta decay: (2
saw5 [17]

Answer:

See explanation and image attached

Explanation:

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The product of the beta decay of the nuclides shown in the question is described in the image attached to this answer.

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