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frozen [14]
1 year ago
7

Is each of the following statements true or false? Correct any that are false.

Chemistry
1 answer:
adell [148]1 year ago
5 0

<u>True,</u> A mole of one substance has the same number of atoms as a mole of any other substance.

<h3>What is a mole?</h3>

Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

The mole designates an extremely large number of units, 6.02214076 × 10^{23}. The General Conference on Weights and Measures defined the mole as this number for the International System of Units (SI) effective from May 20, 2019. The mole was previously defined as the number of atoms determined experimentally to be found in 12 grams of carbon-12.

The number of units in a mole also bears the name Avogadro’s number, or Avogadro’s constant, in honour of the Italian physicist Amedeo Avogadro (1776–1856). Avogadro proposed that equal volumes of gases under the same conditions contain the same number of molecules, a hypothesis that proved useful in determining atomic and molecular weights and which led to the concept of the mole.

Learn more about mole

brainly.com/question/1427235

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tamaranim1 [39]

Answer:

Explanation:

A substance melting is a physical change and the properties of the substance will remain same, only that the substance will just become liquid.

On the other hand, burning is a chemical change which produces an entirely new compount(in most cases, ash) which does not have the same properties as the original object

5 0
3 years ago
Is Amplitude a measure of a waves? A. speed B. energy C. distance D. frequency
iren2701 [21]

the answer is C. Distance

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3 years ago
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941 milliliters is the same as: cm3 and L
Nutka1998 [239]

For this case, we must take into account the following conversion factors:

1 mL = 1 cm ^ 3

1000 mL = 1 L

Therefore, by applying the conversion factors we have:

For cubic centimeters:

(941mL) (1\frac{cm^3}{mL}) = 941cm ^ 3

For liters:

(941mL) (\frac{1}{1000}\frac{L}{mL}) = 0.941L

Answer:

941 milliliters is the same as:

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6 0
3 years ago
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We discussed many properties and characteristics of acids in this lesson. Which of the following is NOT one that was mentioned?
lys-0071 [83]

Answer: A. Acids have a slippery feel.

Explanation:

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It changes the color of the litmus paper to red.

It react with a metal to give compound and hydrogen gas.

Base : It is a substance that has ability of donating hydroxide ion, OH^-.

The properties of an base are :

Base are bitter in taste.

The texture of a base solution is slippery.

It changes the color of the litmus paper to blue.

It does not react with a metal.

Thus bases have slippery nature and not acids.

3 0
4 years ago
Calcium-45 has a half-life of 162.7 days. if four half-lives have elapsed, how much time has passed?
stiv31 [10]
Half-life is the time required for a quantity to reduce to half its initial value. <span>If four half-lives have elapsed for calcium-45, then it would be 4x162.7 = 650.8 days have passed. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
3 0
3 years ago
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