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Bad White [126]

4 years ago

11

What happens if a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite?

1 answer:

Lapatulllka [165]4 years ago

4 0

Hydrochloric acid on a rock or mineral and watching for bubbles of carbon dioxide gas to be released. The bubbles signal the presence of carbonate minerals such as calcite and dolomite.

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Write the electronic configuration of 6c element and state the group,period to which it belongs<br>

Alexus [3.1K]

Answer:

Carbon = 1s2 2s2 2p2 group= 14 period = 2

Explanation:

group can be taken from the electronic configuration here it is 2s2 2p2 so it should belongs to 4A or 14

7 0

3 years ago

NEED HELPPP PLSSSSSSSSSS

Leto [7]

I would pick the first option in the third option

4 0

3 years ago

What is the frequency of 704 nm light?

gayaneshka [121]

Explanation:

Sorry pa Wala. Thank God

6 0

3 years ago

A certain substance X condenses at a temperature of 123.3 degree C . But if a 650. g sample of X is prepared with 24.6 g of urea

Pavel [41]

Answer:

<u>The molal boiling point elevation constant is 1.59 ≈ 1.6</u> $Kkgmol^{-1}$

Explanation:

To solve this question , we will make use of the equation ,

Δ $T_{b} = i*K_{b} *m$

<em>where , </em>

<em>Δ $T_{b}$ is the change in boiling point of the substance $X$ ( ° $C$ or $K$ )</em>

<em> $i$ is the Vant Hoff Factor which = 1 in this case ( no unit )</em>

<em> $K_{b}$ is the mola boiling point elevation constant of X ( $Kkgmol^{-1}$ )</em>

<em> $m$ is the molality of the solution which has $(NH_{2})_{2} CO$ as the solute and $X$ as the solution ( $molkg^{-1}$ )</em>

Δ $T_{b}$ = $124.3 -123.3 = 1$ ° $C$ or $K$ ;
$i$ =1;
$m$ = $\frac{moles of solute}{weight of solvent(kg)}$ $molkg^{-1}$

∴ $m = \frac{\frac{24.6}{60} }{\frac{650}{1000} }$

<em>as the weight of $(NH_{2})_{2} CO$ is $60g$ and thus number of moles = $\frac{24.6}{60}$ </em>

<em>and the weight of solvent in $kg$ is $\frac{650}{1000}$ </em>

4. $K_{b}$ ⇒ ?

∴

$1=1*K_{b} *\frac{\frac{24.6}{60} }{\frac{650}{1000} }$

⇒ $K_{b}$ = $1.59$ ≈ 1.6 $Kkgmol^{-1}$

4 0

3 years ago

How many significant digits are in 2804

docker41 [41]

Answer:

4 significant digits

Explanation:

Zeroes placed between other digits are always significant

4 0

3 years ago