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3 years ago

Based on its location on the periodic table, what group does Strontium belong to?

Chemistry

2 answers:

Gnom [1K]3 years ago

8 0

Answer:

alkaline earth metals

Explanation:

NeX [460]3 years ago

3 0

Answer:

Group 2

Explanation:

Strontium (Sr), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table.

Hope this helps

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When might it be preferable to use direct quotations rather than summarizing or paraphrasing

Drupady [299]

Answer:

It is better to use direct quotation rather than summarizing or paraphrasing when you want to share the author's original words.

Explanation:

In writing, it is sometimes necessary to share an authors original words in order to buttress a point or validate an argument. In such cases where it is necessary to use exactly the same diction as the author in order to communicate a point clearly, it is apt to use a direct quotation rather than attempting to summarize or paraphrase the original words of the author.

Hence direct quotation is used to share an author's original words.

5 0

3 years ago

Read 2 more answers

For the reaction POCl3(g) ⇀↽ POCl(g) + Cl2(g) Kc = 0.30. An initial 0.3 moles of POCl3 are placed in a 3.1 L container with init

olya-2409 [2.1K]

Answer: The final concentration of $POCl_3$ is 0.019767 M

Explanation:

Molarity is calculated by using the equation:

$\text{Molarity}=\frac{\text{Number of moles}}{\text{Volume of the solution}}$

Initial moles of $POCl_3$ = 0.3 moles

Volume of solution = 3.1 L

$\text{Initial concentration of }POCl_3=\frac{0.3}{3.1}=0.097M$

For the given chemical equation:

$POCl_3(g)\rightleftharpoons POCl(g)+Cl_2(g)$

Initial: 0.097

At eqllm: 0.097-x x x

The expression of $K_c$ for above equation follows:

$K_c=\frac{[POCl][Cl_2]}{[POCl_3]}$

We are given:

$K_c=0.30$

Putting values in above expression, we get:

$0.30=\frac{x\times x}{(0.097-x)}\\\\x=0.077233,-0.377$

Neglecting the negative value of 'x' because concentration cannot be negative.

So, final concentration of $POCl_3$ = (0.097 - x) = (0.097 - 0.077233) = 0.019767 M

Hence, the final concentration of $POCl_3$ is 0.019767 M

4 0

3 years ago

PLEASE HELP!!!!!!!))

Vedmedyk [2.9K]

No e e jd si u shl use

6 0

3 years ago

Read 2 more answers

What is the value of 1.5 ATM of gas at 20°C and a 3 L vessel are heated at 30°C at a pressure of 5.2 ATM

vampirchik [111]

Answer:

The answer will be approximately 1.0L

Explanation:

The problem has not been properly specified. You could have specified a gas in a PISTON, whose volume would decrease with increased pressure, and increase with increased temperature.

For such a system, we would use the

combined gas law:

$\frac{P1V1}{T1}$ = $\frac{P2V2}{T2}$