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2 years ago

Rubidium (Rb) has two isotopes. Using the data in the table below,

Chemistry

1 answer:

Burka [1]2 years ago

6 0

Answer:

85.6

Explanation:

(72 x 85) + (28 x 87)

-----------------------------

100

= 85.56

= 85.6 (3 s.f.)

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Is Mg a metal non metal or noble gas

madam [21]

It is a metal
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3 years ago

Pollution comes from<br> many small sources.

Digiron [165]

Answer: True

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3 years ago

Chloroform is a liquid once used for anesthetic. What is the volume of 5.0 g of chloroform? The density of chloroform 1.49 g/mL

mario62 [17]

Answer:

3.3557047 mL

Explanation:

The density can be found using the following formula:

$d=\frac{m}{v}$

Let's rearrange the formula to find the volume, $v$ .

$d*v=\frac{m}{v}*v$

$d*v=m$

$\frac{d*v}{d} =\frac{m}{d}$

$v=\frac{m}{d}$

The volume can be found by dividing the mass by the density. The mass of the chloroform is 5 grams and the density is 1.49 grams per milliliter. Therefore,

$m= 5g \\d= 1.49 g/mL$

Substitute the values into the formula.

$v=\frac{5g}{1.49 g/mL}$

Divide. When we divide, the grams, or g, in the numerator and denominator will cancel out.

$v= \frac{5}{1.49}mL$

$v=3.3557047 mL$

The volume of 5 grams of chloroform is 3.3557047 milliliters

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3 years ago

Please Help 8-9!!!!!!!

seropon [69]

The labeled diagram is given in the image attached.

As it can be seen from the image that freezing is when energy is removed from the system at 0 ⁰ while melting is when energy is added at 0⁰.

Also when energy is added at 100⁰C, it causes boiling while when it is removed at 100⁰C, it causes condensation.

Melting point of water is 0⁰C while boiling point is 100⁰C

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2 years ago

How was the modern understanding of the atom developed?

Zepler [3.9K]

Answer:

The modern understanding of an atom was developed by the quantum theory

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2 years ago