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ANTONII [103]
3 years ago
10

The period of daylight experienced each day on every part of Earth would be shorter if which one of the following changes occurr

ed?
A Earth had a greater diameter.
B The mass of the Sun was greater.
C Earth rotated more quickly on its axis.
D The Sun was farther away from Earth.
Chemistry
1 answer:
lilavasa [31]3 years ago
5 0

Answer:

c

Explanation:

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Which of the following is true about a compound and its elements?
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 They can change properties completely 
They can be separated 
They form a new set of elements and compounds 
<span>The elements become part of the original compounds</span>
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Passive prostheses are:
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Passive prostheses are self-regulating, as shown in the first answer option.

We can arrive at this answer because:

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This limitation allows passive prostheses not to need external regulation and to be self-regulated by fitting the body parts.

You can find more information about articulations and their effects on the link:

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2 years ago
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A solution of hydrochloric acid of unknown concentration was titrated with 0.10 M NaOH. If a 100.-mL sample of the HCl solution
madam [21]

<u>Answer:</u> The initial pH of the HCl solution is 3

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HCl

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=1\\M_1=?M\\V_1=100mL\\n_2=1\\M_2=0.10M\\V_2=1mL

Putting values in above equation, we get:

1\times M_1\times 100=1\times 0.10\times 1\\\\M_1=\frac{1\times 0.10\times 1}{1\times 100}=10M

1 mole of HCl produces 1 mole of H^+ ions and 1 mole of Cl^- ions

To calculate the pH of the solution, we use the equation:

pH=-\log[H^+]

We are given:

[H^+]=0.001M

Putting values in above equation, we get:

pH=-\log (0.001)\\\\pH=3

Hence, the initial pH of the HCl solution is 3

6 0
3 years ago
Amino acid Is a compound that contains at least
Lubov Fominskaja [6]

They contain Carbon, Nitrogen, Hydrogen, Oxygen, and Sulfur

4 0
3 years ago
How can the law of conservation of<br> mass for a chemical reaction be expressed?
djverab [1.8K]

Answer:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Explanation:

How does the concept of conservation of mass apply to chemical reactions? the reactants and products have exactly the same atoms. the reactants and products have exactly the same molecules. the change in the amount of matter is equal to the change in energy.

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