3 years ago

Mass is 112.8g and the volume is 63cm3 , whats the density of the cube?

Chemistry

1 answer:

nirvana33 [79]3 years ago

7 0

Answer:

1.79047619048

Explanation:

density = mass/volume

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A newly discovered element, Z, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267

blsea [12.9K]

atomic mass=percentage of isotope a * mass of isotope a + percentage of isotope b * mass of isotope b+...+percentage of isotope n * mass of isotope n.

Data:
mass of isotope₁=267.8 u
percentage of isotope₁=90.3%

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3 years ago

What is the relative rate of diffusion of hydrogen and nitrogen

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Answer:

2.645

Explanation:

Rate of diffusion formula:

Sqrt(mass2/mass1)

>>sqrt(14/2)

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2 years ago

Under certain conditions, the substance ammonium chloride can be broken down to form ammonia and hydrogen chloride. If 29.4 gram

lina2011 [118]

Answer: 20.0 g of hydrogen chloride must simultaneously be formed

Explanation:

The balanced chemical reaction is :

$NH_4Cl\rightarrow NH_3+HCl$

According to the law of conservation of mass, mass can neither be created nor be destroyed. The mass on reactant side must be equal to the mass on product side.

Thus mass of reactants = mass of products

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mass of ammonia = 9.4 g

mass of products = mass of ammonia + mass of hydrogen chloride

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mass of hydrogen chloride = 20.0 g

5 0

3 years ago