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2 years ago

7

Explain the concept of kenetic molecular theory

1 answer:

Sedaia [141]2 years ago

5 0

Not sure if you meant kinetic.. The theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. The theory is based on the idea that matter is composed of tiny particles that are always in motion.

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Pamela wants to learn more about the career preferences of students in her school. She interviews a number of students from the

Viktor [21]

It is too early for students to have career preferences while still in school

(i believe) <span />

4 0

3 years ago

A 4.36 g sample of an unknown alkali metal hydroxide is dissolved in 100.0 ml of water. an acid-base indicator is added and the

Fofino [41]

Answer:

(a) $102.6g/mol$

(b) Rubidium

Explanation:

Hello,

This titration is carried out by assuming that the volume of base doesn't have a significant change when the mass is added, thus, we state the following data a apply the down below formula to compute the molarity of the base solution:

$V_{base}=0.1L; M_{acid}=2.5M, V_{acid}=0.017L\\V_{base}M_{base}=V_{acid}M_{acid}$

Solving for the molarity of base we've got:

$M_{base}=\frac{M_{acid}*V_{acid}}{V_{base}}=\frac{2.50M*0.017L}{0.1L} =0.425M=0.425mol/L$

Now, we can compute the moles of the base as:

$n_{base}=0.425mol/L*0.1L=0.0425mol$

(a) Now, one divides the provided mass over the previously computed moles to get the molecular mass of the unknown base:

$\frac{4.36g}{0.0425mol} =102.6g/mol$

(b) Subtracting the atomic mass of oxygen and hydrogen, the metal's atomic mass turns out into:

$102.6g/mol-16g/mol-1g/mol=85.6g/mol$

So, that atomic mass dovetails to the Rubidium's atomic mass.

Best regards.

8 0

2 years ago

Convert 625 mg to kg.

svetlana [45]

Answer: 0.000625

Explanation:

If you don't know, one Milligram is equivalent to 0.000001 Kilograms. Hence, we'll multiply 625 by 0.000001.

With that being said, 625 times 0.000001 will equal to 0.000625.

Don't forget to add the units.

Milogram unit ⇒ mg

Kilogram unit ⇒ kg

Finally, your grand answer is 0.000625.

<em>Please comment down below for any questions about my answer.</em>

4 0

2 years ago

An inference _______.

ryzh [129]

Answer:

A

Explanation:

Am Inference is an educated guess, or a guess using prior knowledge

3 0

2 years ago

The vapor pressure of liquid octane, C8H18, is 40.0 mm Hg at 318 K. A sample of C8H18 is placed in a closed, evacuated container

Sergio039 [100]

Answer:

a, d

Explanation:

a. The pressure in the container will be 42.8 mm Hg.

d. Some of the vapor initially present will condense.

6 0

2 years ago