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3 years ago

Why fluorine is often added to drinking water and toothpaste

2 answers:

5 0

As someone said it does reduce tooth decay but also keeps your teeth from a certain substance that is found in lead and stuff

chubhunter [2.5K]3 years ago

4 0

Fluoride is often added to drinking water to help reduce tooth decay

Also for toothpaste to help prevent tooth decay

Better Bush

I hope I helped

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An estser is the reaction product between: a. Alcohol and organic acid

san4es73 [151]

An ester is the reaction product between A. alcohol and organic acid.

3 0

3 years ago

A student prepares a solution of Potassium Nitrate (KNO3) containing 95g at 40 C. This solution is -

Sholpan [36]

Answer:

unsaturated

Explanation:

4 0

2 years ago

Calculate the volume occupied by 272g

cupoosta [38]

The answer for the following problem is mentioned below.

Therefore volume occupied by methane gas is 184.78 × 10^-3 liters

Explanation:

Given:

mass of methane( $CH_{4}$ ) = 272 grams

pressure (P) = 250 k Pa =250×10^3 Pa

temperature(t) = 54°C =54 + 273 = 327 K

Also given:

R = 8.31JK-1 mol-1 ,

Molar mass of methane( $CH_{4}$ ) = 16.0 grams

We know;

According to the ideal gas equation,

P × V = n × R × T

here,

n = m÷M

n =272 ÷ 16

n = 17 moles

Therefore,

250×10^3 × V = 17 × 8.31 × 327

V = ( 17 × 8.31 × 327 ) ÷ ( 250×10^3 )

V = 184.78 × 10^-3 liters

Therefore volume occupied by methane gas is 184.78 × 10^-3 liters

6 0

3 years ago

What’s 73m equal to in dm

MaRussiya [10]

Answer:730

Explanation:

6 0

3 years ago

Part B Write the balanced chemical equation for the neutralization reaction that occurs when an aqueous solution of hydrobromic

Doss [256]

Answer:

HBr(aq) + LiOH(aq) → LiBr(aq) + H2O(l)

Explanation:

A neutralization reaction is a process in which an acid, aqeous HBr reacts completely with an appropriate amount of base, aqueous LiOH to produce salt, aqueous LiBr and water, liquid H2O only.

HBr(aq) + LiOH(aq) → LiBr(aq) + H2O(l)

Acid + base → Salt + Water.

During this reaction, the hydrogen ion, H+, from the HBr is neutralized by the hydroxide ion, OH-, from the LiOH to form the water molecule, H2O.

Thus, it is called a neutralization reaction.

4 0

2 years ago