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4 years ago

Why does hydrochloric acid have a higher boiling point than diatomic fluorine?

1 answer:

4 0

Hydrochloric acid is polar which means it has stronger bonds between it's molecules, unlike diatomic fluorine that is non-polar and has weaker bonds. That's why it has a higher boiling point.

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Density differences in different materials are able to change the of a wave. A)Amplitude B)Crest C)Speed D)Trough

Maurinko [17]

Answer:

C. Speed

Explanation:

Density differences in different materials are able to change the speed of a wave.

Wave speed is dependent on the frequency and wavelength of a wave.
As a wave travels from one medium to another, the speed of the wave changes.
Speed of a wave is medium dependent.
The denser a medium, the slower the speed of waves will be be.
A less dense medium will have waves traveling through faster.

6 0

3 years ago

Read 2 more answers

Which of the following was most likely NOT present in creating the amino acids of early Earth's water of the past? A. ammonia B.

Igoryamba

B or D but id say go with D

7 0

3 years ago

Read 2 more answers

Which of the following is not a chemical property of a substance?

zhenek [66]

Answer:

First of all you need to know that chemical properties are those who are determined by chemical tests and are related to the reactivity of chemical substances. In those statements you have 4 reactions, except on "conducts electricity". That is a physical property.

Explanation:

A chemical reaction is a way in which the atoms of the elements regroup to form new substances.

3 0

3 years ago

Use the heating curve of 60.0 grams of ice and the list of values to answer the question.

Vesna [10]

Answer:

25kj fdgsgdgdhdhfhfgfhfhfjbk

6 0

3 years ago

A chemist wishing to do an experiment requiring 47Ca2+(half-life = 4.536 days) needs 5.00 g of the nuclide. What mass of 47CaCO

Artyom0805 [142]

Answer: The answer is 6.78 grams.

Explanation: The equation used for solving this type of problems is:

$\frac{N}{N_0}=(\frac{1}{2})^n$

where, $N_0$ is the initial amount of radioactive substance, N is the remaining amount and n is the number of half lives.

Number of half lives is calculated on dividing the given time by the half life.

n = time/half life

Time is given as 48.0 hours and the half life is given as 4.536 days. let's make the units same and for this let's convert the half life from days to hours.

$4.536days(\frac{24hours}{1day})$

= 108.864 hours

So, $n=\frac{48.0}{108.864}$ = 0.441

Since 5.00 g is the required amount when the radioactive substance is delivered to the scientist, it would be the final amount that is N. We need to calculate the initial amount. Let's plug in the values in the equation:

$\frac{5.00}{N_0}=(\frac{1}{2})^0^.^4^4^1$

$\frac{5.00g}{N_0}=0.737$

$N_0=\frac{5.00g}{0.737}$

$N_0$ = 6.78 g

So, 6.78 g of the radioactive substance needs to be ordered.

4 0

4 years ago