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3 years ago

Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name?

Chemistry

2 answers:

skelet666 [1.2K]3 years ago

7 0

Answer:

Explanation:

GaryK [48]3 years ago

4 0

Answer:

C) Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.

Explanation:

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The substance that does the dissolving in the mixture solution is called the

const2013 [10]

Answer: Solute

Explanation:

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4 years ago

Which of the following models best describes the arrangement of valence electrons in metals?

Lana71 [14]

The arrangement of valence electrons in metals can be best described by the

A sea of electrons.

7 0

3 years ago

In which way does a balanced chemical equation demonstrate the conservation of matter?

Alika [10]

Answer:

Every chemical equation adheres to the law of every conservation of mass and the states of matter cannot be created or destroyed

Explanation:

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3 years ago

The Mond process produces pure nickel metal via the thermal decomposition of nickel tetracarbonyl: Ni(CO)4 (l) → Ni (s) + 4CO (g

Yuki888 [10]

Answer: The volume of CO formed is 254.43 L.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of $Ni(CO)_4$ = 444 g

Molar mass of $Ni(CO)_4$ = 170.73 g/mol

Putting values in above equation, we get:

$\text{Moles of }Ni(CO)_4=\frac{444g}{170.73g/mol}=2.60mol$

For the given chemical reaction:

$Ni(CO)_4(l)\rightarrow Ni(s)+4CO(g)$

By stoichiometry of the reaction:

1 mole of nickel tetracarbonyl produces 4 moles of carbon monoxide.

So, 2.60 moles of nickel tetracarbonyl will produce = $\frac{4}{1}\times 2.60=10.4mol$ of carbon monoxide.

Now, to calculate the volume of the gas, we use ideal gas equation, which is:

PV = nRT

where,

P = Pressure of the gas = 752 torr

V = Volume of the gas = ? L

n = Number of moles of gas = 10.4 mol

R = Gas constant = $62.364\text{ L Torr }mol^{-1}K^{-1}$

T = Temperature of the gas = $22^oC=(273+22)K=295K$

Putting values in above equation, we get:

$752torr\times V=10.4mol\times 62.364\text{ L Torr }mol^{-1}K^{-1}\times 295K\\\\V=254.43L$

Hence, the volume of CO formed is 254.43 L.

5 0

3 years ago

True or False Electrons contribute most of the mass of an atom?

Natali5045456 [20]

Answer:

False

Explanation:

Mass of the atom is mostly contributed by nucleus.
Nucleus consists of Protons and Neutrons
Mass number defined by No of protons+No of neutrons

3 0

3 years ago

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