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3 years ago

Which of the following statements best describes why a liter of mercury weighs more than a liter of water

2 answers:

5 0

Density of any substance can be measured using the following rule:
density = mass / volume

Since in this question, the volume of mercury is equal to the volume of water but still the mass of mercury is greater than the mass of water.
Therefore, by substituting in the density equation, we will conclude that mercury is higher density than water.

The answer is:
<span>Mercury is denser than water</span>

Simora [160]3 years ago

5 0

Answer:

B. Mercury is denser than water

Explanation:

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The absorbance of an equilibrium mixture containing FeSCN2 was measured at 447 nm and found to be 0.347. What is the equilibrium

Ksenya-84 [330]

Answer:

The concentration is $C = 1.11 mol/L$

Explanation:

From the question we are told that

The absorbance is $A = 0.347$

The length is $l = 447 nm = 447 *10^{-7} \ cm$

Generally absorbance is mathematically represented as

$A = \epsilon* C * l$

where $\epsilon$ is the molar absorptivity of FeSCN2 with a value $\epsilon = 7.0*10^3 L/cm/mol$

and $C$ is the equilibrium concentration of FeSCN2

$C = \frac{A}{\epsilon * l }$

substituting values

$C = \frac{0.347}{7.0*10^{3} * 447 *10^{-7} }$

$C = 1.11 mol/L$

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3 years ago

Stalactites and stalagmites form as ________ precipitates out of the water evaporating in underground caves.

Fittoniya [83]

Stalactites and stalagmites form as ________ precipitates out of the water evaporating in underground caves.

Group of answer choices

hydrochloric acid

sodium bicarbonate

calcium carbonate

sodium chloride

sodium hydroxide

Answer:

calcium carbonate

Explanation:

A stalactite is an icicle-looking mould that is formed by the precipitation of natural minerals as a result of water dripping from the ceiling, hanging from a cave.

A stalagmites in the other hand, grows upwards and is also a mound that is formed by the deposits of minerals gotten by the water dripping on the floor of a cave.

Therefore, stalactites and stalagmites form as calcium carbonate precipitates out of the water evaporating in underground caves.

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3 years ago

The melting points and boiling points of 4 substances are shown.

Serggg [28]

Answer:

it's

C. with melting point 11° C and boiling point 181° C

Explanation:

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Can you guys help me with this one part?

Pani-rosa [81]

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