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4 years ago

I'LL GIVE U BRAINLIEST

Chemistry

2 answers:

Arturiano [62]4 years ago

8 0

A, b, c, d, e, f, all of them should be checked

zysi [14]4 years ago

4 0

Answer : The correct options are, (a), (c), (d) and (f).

Explanation :

There are some safety rules for science lab when we are performing the experiments :

Always wear the lab coat to protect you from chemicals.
Always wear the gloves in your hands.
Always wear the face mask to protect you from the pungent smell of chemicals.
Always wear the glasses to protect the eyes.
Before doing some experiment wash all the materials with distilled water.

There are some safety rules for science lab in case of a laboratory accident:

Always stay calm at that time.
Do not try to clean up a spill.
Always follow the directions of the teacher.
Leave the area immediately.

Hence, the correct options are, (a), (c), (d) and (f).

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Person. I hope this helps.

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3 years ago

A chemist dissolves 1.3 mol NaCl in a 2.0-kg sample of water. What is the boiling point of this solution? (Assume that pure wate

mafiozo [28]

For this problem, the solution is exhibiting some colligative properties since the solute in the solution interferes with some of the properties of the solvent. We use equation for the boiling point elevation for this problem. We do as follows:
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3 years ago

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Consider the dissolution of AB(s): AB(s)⇌A+(aq)+B−(aq) Le Châtelier's principle tells us that an increase in either [A+] or [B−]

Arlecino [84]

Answer:

A. 0.000128 M is the solubility of M(OH)2 in pure water.

B. $3.23\times 10^{-6} M$ is the solubility of $M(OH)_2$ in a 0.202 M solution of $M(NO_3)_2$ .

Explanation:

Solubility product of generic metal hydroxide = $K_{sp}=8.45\times 10^{-12}$

$M(OH)_2\rightleftharpoons M^{2+}+2OH^-$

S 2S

The expression of a solubility product is given by :

$K_{sp}=[M^{2+}][OH^-]^2$

$K_{sp}=S\times (2S)^2=4S^3$

$8.45\times 10^{-12}=4S^3$

Solving for S:

$S=0.000128 M$

0.000128 M is the solubility of M(OH)2 in pure water

Concentration of $M(NO_3)_2$ = 0.202 M

Solubility product of generic metal hydroxide = $K_{sp}=8.45\times 10^{-12}$

$M(OH)_2\rightleftharpoons M^{2+}+2OH^-$

S 2S

So, $[M^{2+}]=0.202 M+S$

The expression of a solubility product is given by :

$K_{sp}=[M^{2+}][OH^-]^2$

$8.45\times 10^{-12}=(0.202 M+S)(2S)^2$

Solving for S:

$S=3.23\times 10^{-6} M$

$3.23\times 10^{-6} M$ is the solubility of $M(OH)_2$ in a 0.202 M solution of $M(NO_3)_2$ .

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4 years ago

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Answer: The given statement is False.

According to alternative hypothesis, observed difference exists between research variables, which does not occur by chance.

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Thus, the given statement is False.

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Did Pb2+ react with KI? Yes or No? State the reason of your answer.

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Yes, Pb2+ react with KI.

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Both potassium and iodine are highly reactive elements. Thus, when they are combined with another element like Pb2+, Pb2+ reacts with KI

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4 years ago

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