CHEMISTRY COLLEGE

A geochemist in the field takes a 13.0 mL sample of water from a rock pool lined with crystals of a certain mineral compound X. He notes the temperature of the pool, 16.° C, and caps the sample carefully. Back in the lab, the geochemist filters the sample and then evaporates all the water under vacuum. Crystals of X are left behind. The researcher washes, dries and weighs the crystals. They weigh 0.143 gRequired:
Using only the information above, can you calculate the solubility of X in water at 15°C ? If you said yes, calculate it.

Answers

Answer 1

Answer:

The answer is YES

The value is $S = 110 \ g/L$

Explanation:

From the question we are told that

The volume of the sample taken is v = 13.0 mL

The temperature is $T = 16^oC$

The mass of the sample is $m = 0.143 g$

Generally the solubility of the substance X is mathematically represented as

$S = (m)/(V)$

=> $S = (0.143 )/(13.0)$

=> $S = 0.011 \ g/mL$

=> $S = 110 \ g/L$

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Answers

Answer:

ye do it is bad for healthcare community has u to do with health to and public

What action is NOT necessary before lighting a Bunsen burner?A)Make sure there are no holes in the hose connected to the burner.
B)Leave the gas stop open for a few minutes before lighting to clear the line.
C)Clear the burner area of flammable materials such as solvents and papers.
D)Check that the gas regulator and air inlet on the burner can be adjusted.

Answers

The Bunsen burner is a heating apparatus used to heat samples in the laboratory. The correct answer is option B: )Leave the gas stop open for a few minutes before lighting to clear the line.

A Bunsen burner is commonly used as a heating apparatus. It contains a gas that can be controlled using a gas regulator.

It is necessary to do the following before lighting the Bunsen burner;

Make sure there are no holes in the hose connected to the burner.
Clear the burner area of flammable materials such as solvents and papers.
Check that the gas regulator and air inlet on the burner can be adjusted.

So, it is not necessary to Leave the gas stop open for a few minutes before lighting to clear the line before lighting a Bunsen burner.

Learn more: brainly.com/question/743920

Answer:

the answer is opetuon B

1. How isotopes of copper are Cu-63 and Cu-65. How are these two isotopes the same? How are they different?2. What is an isotope?

3. Why do elements in the same group have similar chemical properties?

4.What are valence electrons?

5.Write the symbol for each of the following elements:
The halogen in period three
The alkali metal in period two
The noble gas in period one
The alkaline earth element in period six
Any transition metal in the 5th period
A metaloid in group 14
A nonmetal in group 16

6. What are two differences between a metal and a nonmeta

PLEASE ASAP!!!!!!!!!!!!!!

Answers

Answer:

question 6. answer is Metals are considered to be electropositive in nature due to their ability to donate electrons. Whereas non-metals are electronegative as they generally accept electrons

(b) Liquid hexane burns in oxygen gas to form carbon dioxide gas and water vapor.
True/False

Answers

Answer:

True

Explanation:

Liquid hexane burns in oxygen gas to form carbon dioxide gas and water vapor.TRUE.

This is the complete combustion reaction of hexane, which proceeds according to the following equation.

C₆H₁₄(l) + 9.5 O₂(g) → 6 CO₂(g) + 7 H₂O(g)

If the combustion were incomplete, instead of carbon dioxide, the product would be carbon monoxide or carbon.

What are 4 molecules made of the same substance

Answers

Answer:

H2O (water)

N2 (nitrogen)

O3 (ozone)

CaO (calcium oxide)

Explanation:

HOPE IT HELPS

How many electrons are in Fe3+ ?

Answers

23 electrons hope this helps

Answer:

There are 23 electrons in Fe3+

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In basic enzyme kinetics, a large Km indicates that the substrate binds A. Permanently B. Transiently C. Covalently D. with low specificity E. Weakly

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A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238. Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half-life for 238U  206Pb is 4.5  109 yr.)