If a pure substance consists of hydrogen and oxygen and a mixture consists of hydrogen and oxygen:

Chemistry

1 answer:

Usimov [2.4K]3 years ago

4 0

the components of the pure substance will not be able to be separated by physical means

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Which of the following words means "the thing from which something else comes"?

swat32

Answer:

b. source

Explanation:

The source is where something comes from. i.e. The source of sunlight is the sun.

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4 years ago

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What is the mass in grams of a single formula unit of silver chloride, AgCI? A) 4.21 x 1021 g B) 8.61 x 10258 C) 1.66 x 10-248 D

bekas [8.4K]

Answer: D) $2.38*10^-^2^2$ g

Explanation: The question asks to convert formula unit to grams. It is a unit conversion problem.

1 mole equals to Avogadro number of formula units. So, to convert the given number of formula units to moles, we need to divide by the Avogadro number. After this, we do moles to grams conversion and for this the moles are multiplied by the molar mass of the compound. Molar mass of AgCl is 143.32 gram per mol.

$1FormulaUnitAgCl(\frac{1mol}{6.022*10^2^3formulaUnits})(\frac{143.32g}{1mol})$

= $2.38*10^-^2^2$ g

So, the correct option is D) $2.38*10^-^2^2$ g

7 0

3 years ago

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Siya saw two elements X and Y. Element X is shiny and hard, while element Y is dull and

ExtremeBDS [4]

Answer:element x

Explanation:because element x is shiny and hard and that's a property of metals and metals are good conductors of heat and electricity

3 0

3 years ago

Can you please answer number 8 thanks

Bond [772]

Well February 29 is a date that usually occurs every 4 years and this is called a leap year.This day is added to the your calendar in leaps years as a corrective measure because the Earth does not orbit the sun in precisely 365 days! hope it helps and have a great day!

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3 years ago

3 C2H2(g) → C6H6(g) What is the standard enthalphy change ΔHo, for the reaction represented above? (ΔHof of C2H2(g) is 230 kJ mo

masha68 [24]

Answer: The standard enthalpy change is -607kJ

Explanation:

The given balanced chemical reaction is,

$3C_2H_2(g)\rightarrow C_6H_6(g)$