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3 years ago

Who wrote the pit and the pendulum

Chemistry

1 answer:

netineya [11]3 years ago

8 0

Edgard Allan Poe

https://en.wikipedia.org/wiki/The_Pit_and_the_Pendulum

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What is the volume of a salt crystal measuring 1.64 x 10^-2m by 1.5 x 10^-2m by 4.8 x 10^-3

lubasha [3.4K]

Answer:

V = 1.2 × 10⁻⁶ m³

Explanation:

Volume is equal to length × width × height, since we are given these measurements in the question we can simply plug our numbers into the formula.

V = l × w × h

V = 1.64 x 10⁻² × 1.5 x 10⁻² × 4.8 x 10⁻³

V = 1.2 × 10⁻⁶ m³

5 0

4 years ago

What is the osmolarity of .00001 grams (0.1 mg%) of ethanol (does not dissociate) in one liter?

MrMuchimi

Explanation:

As it is known that non-electrolytes do not dissociate. Therefore, molarity of such a solution is equal to the osmolarity of solution.

As, molar mass of ethanol = 46.07 g/mol

Therefore, no. of moles of ethanol will be calculated as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $\frac{0.00001 g}{46.07 g/mol}$

= $2.17 \times 10^{-7}$ mol

As, molarity is moles of solute in liter of solution. Hence, molarity of ethanol is as follows.

Molarity = $\frac{\text{no. of moles}}{volume}$

= $\frac{2.17 \times 10^{-7} mol}{1 L}$

= $2.17 \times 10^{-7}$ mol/L

Since, for the given solution Molarity = osmolarity

Thus, we can conclude that osmolarity of .00001 grams (0.1 mg%) of ethanol in 1 L is $2.17 \times 10^{-7}$ osmol/L.

8 0

3 years ago

How do the hydrosphere and atmosphere interact? give an example

vladimir1956 [14]

Answer:

Evaporation

Explanation:

Water in the ocean, rivers, lakes, etc. is part of the hydrosphere, and when that water evaporates it enters the atmosphere

3 0

3 years ago

How many moles is 2.80 x10^24 atoms of silicon?

son4ous [18]

The moles of silicon is 4.651 moles

<u><em>calculation</em></u>

The moles of silicon is calculated using Avogadro's constant

that is according to Avogadro's law

1 mole = 6.02 x 10^23 atoms

? moles = 2.80 x 10 ^24 atoms of silicon

by cross multiplication

= [ ( 1 mole x 2.80 x 10^24 atoms) / ( 6.02 x 10 ^23 atoms)]

= 4.651 moles

4 0

3 years ago

Read 2 more answers

How do you calculate the number of moles of an element from a given mole quantity of a compound, using the chemical formula?

RoseWind [281]

Answer:

Multiply the given mole quantity by the ratio of the moles from the chemical formula (moles of desire / moles of given in the formula) x moles given

Explanation:

7 0

3 years ago