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svet-max [94.6K]

3 years ago

5

ASAP. Which pair of elements will form an ionic bond.

1 answer:

Bogdan [553]3 years ago

8 0

4 because barium is ionic and chlorine is covelent

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Melted candle wax has no fixed shape, but it does have a fixed volume. So, melted candle wax is a

dlinn [17]

It is a liquid because when you have a liquid, there is no definite shape. Therefore, this would be the answer because it takes the shape of its container.

Final answer: a. Liquid

7 0

3 years ago

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What isotope is used for a standard for other atomic masses?

sergeinik [125]

Though the ratio of any two atom's masses was the same on either scale, it was horribly confusing, so in 1961, a compromise was reached. Instead of using either Hydrogen, or Oxygen as the standard, the isotope of Carbon<span> with 6 </span>protons<span> and 6 neutrons in its nucleus (</span>Carbon-12<span>) was given a mass of exactly 12.</span>

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3 years ago

How will you separate a solution of benzene and chloroform?

Troyanec [42]

Answer:

$\huge\boxed{\sf Distillation}$

Explanation:

State of benzene at RTP = liquid
State of chloroform at RTP = liquid
Boiling point of benzene = 80.1 °C
Boiling point of chloroform = 61.2 °C

Since, both of the chemicals are liquids, we can separate it by the process of distillation.

<u>Distillation:</u>

is the process in which we separate two liquids on the basis of their difference in boiling points.

<u>How it works:</u>

Since chloroform has less boiling point, it will evaporate and collected first and benzene will follow it after sometime.

- Apparatus of distillation is in the attached file.

$\rule[225]{225}{2}$

7 0

2 years ago

How many trees must be harvested to treat one person

kirill115 [55]

There are 7 trees that have to be harvested

8 0

3 years ago

A chemical factory is making soda ash (NA2CO3) from sodium bicarbonate. The production manager calculates they will make 80 tons

grigory [225]

Answer:

$\boxed{\text{ 93 \%}}$

Explanation:

$\text{\% yield} = \dfrac{\text{actual yield}}{\text {theoretical yield}} \times\text{100 \%}$

Data:

$\begin{array}{rcr}\text{Actual yield} & = & \text{74.3 T}\\\text{Theoretical yield} & = & \text{80 T}\\\end{array}$

Calculation:

$\text{\% yield} = \dfrac{\text{74.3 T}}{\text {80 T}} \times\text{100 \%} = \textbf{93 \%}}\\\\\text{The percent yield was } \boxed{\textbf{93 \%}}$

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2 years ago