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hodyreva [135]
2 years ago
6

For which of the following activities might you want to hire a chemist?

Chemistry
2 answers:
Basile [38]2 years ago
7 0

Answer:

OPTION (A) : Testing a rock sample for gold content

Explanation:

For testing a rock sample of gold content you will need a Chemist. To test the material, the sample is rubbed on black stone which will leave a mark on the stone. This mark is tested by applying aqua fortis i.e nitric acid on the mark. If the mark gets dissolve then the material is not gold. If the mark sustain the it is further tested by applying aqua regia i.e nitric acid and hydrochloric acid which will prove the sample is of gold if it gets dissolve on using hydrochloric acid. The purity of the sample can be checked by differing the concentration of the aqua regia and comparing it with the gold material of the known purity.

valentinak56 [21]2 years ago
6 0

Answer:

Testing a rock sample for gold content

Explanation:

done the topic

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m_a_m_a [10]

Answer:

G- Gallons-Miles

Explanation

Even though gallons of gas are converted to miles you cannot physically convert gallons of something to miles.

6 0
3 years ago
Leopard seals are animals adapted to survive in the freezing conditions of Antarctica. Individual leopard seals vary in their di
andreev551 [17]

Answer:

B. Thicker layer of blubber

Explanation:

For the leopard seals to survives this harsh environment, it must have a thicker layer of blubber

Blubber is a thick layer of fat. It is called the adipose tissues and found in most marine organisms.

  • This layer helps in insulating the body against heat loss.
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6 0
2 years ago
Which of these is a mixture
goldfiish [28.3K]
You are right sugar is a mixture and salad, water and potassium are all wrong.
Your Welcome
3 0
3 years ago
Read 2 more answers
Air can be considered a ____________ of gaseous elements and compounds.
vodomira [7]
The answer would be B - homogeneous mixture
5 0
3 years ago
A 15.50 gram sample of a gas exerts a pressure of 1.40 atmospheres when held in an 8.00 liter at 22 °C. What is the molar mass (
Lostsunrise [7]

Answer:

33.5 g/mol

Explanation:

PV=nRT

(1.40 atm)(8.00 L)=n(0.08206)(295 K)

n=0.463 mol

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3 0
3 years ago
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