2 years ago

One of the main goals of environmental science is to help humans use the environment in a way that is economically profitable.

Chemistry

1 answer:

kkurt [141]2 years ago

5 0

Answer:

true this is correct its your econimically

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Josie created a Venn Diagram to determine the differences and similarities between weather and climate. PLSSS HELP I HAVE 15 MIN

DENIUS [597]

Answer:

Climate is long time intervals and weather is short time intervals

Explanation:

4 0

3 years ago

If the thermal energy of the system increases by 400 j and 1100 j of heat were added to the system how much work did the system

Pie

your answer should be 700J

7 0

3 years ago

Lastly, Snape thinks we should try one more calculation.

EleoNora [17]

Answer:

E) 0.90

Explanation:

In TLC (Thin-Layer-Chromatography) retention factor RF is defined as the ratio between distance of the sample and the solvent front. RF is very important in chemistry to know the composition of any sample by comparison.

In the problem, as the sample has a distance of 0,20cm from the solvent front, the distance of the sample is:

2,0cm - 0,20 cm = 1,8 cm. Thus, RF is:

RF = 1,8cm / 2,0cm = 0,90

E) 0,90

I hope it helps!

3 0

3 years ago

The solubility of a certain compound in ice-cold water is 0.16 g in 100 mL. Its solubility in hot water is 4.35 g in 100 mL. Wha

jonny [76]

Answer:

96.32 %

Explanation:

Given that:

The solubility of compound in hot water = 4.35 g / 100 mL

The solubility of compound in cold water = 0.16 g / 100 mL

Which means that in 100 mL of hot water, the dissolved compound is 4.35 g and in cold water, the dissolved compound is 0.16 g

Hence, on transition, compound that will catalyze is 4.35 - 0.16 g = 4.19 g

So,

$\%=\frac {4.19}{4.35}\times 100$

Percent recovery for re-crystallization of this compound from water= 96.32 %

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3 years ago

What is the most abundant chemical element in the universe?

Len [333]

hydrogen is the most

5 0

3 years ago