0.200 mol of nitric acid reacts with copper (II) oxide. A mass of 15.3g of copper (II) nitrate is produced.

Chemistry

1 answer:

kaheart [24]3 years ago

5 0

Answer:

the percentage yield of Cu(NO3) 2 is 40%

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a block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. it has a mass of 213 g. what is its density? a. 638 g/cm3 b.

Juliette [100K]

Volume = 3 cm × 3cm × 3cm
= 27 cm ³

Mass = 213 g

Density = $\frac{MASS}{VOLUME}$

= $\frac{213 g}{27 cm ^{3} }$

 = 7.89 g / cm³

Thus answer is D.

8 0

3 years ago

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Choose the correct mole ratio for the balanced equation below. Ca + 2H2O → Ca(OH)2 + H2

Cerrena [4.2K]

Answer: For every one mole of Ca used in this reaction, two mols of H20 are used, one mole of Ca(OH)2 is formed, and one mole of H2 is formed.

Explanation: Once the equation is balanced, you can get the ratio from the coefficients. If you are looking at the ratio of Ca to H2O, the ratio is 1:2; Ca to H2 1:1.

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2 years ago

Use molecular structure and intermolecular bonding to describe why bromine has a lower boiling point than water

kotegsom [21]

Answer:

Bromine mollecules are held together by van der waals forces while a water molecule constitutes both van der waals forces and hydrogen bomnding

Explanation:

This makes the water molecule recquire more heat energy to break the bond thus a higher boiling point while bromine structure requires just litttle heat energy

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3 years ago

A rectangular block of solid carbon (graphite) floats at the interface of two immiscible liquids.

Sergio039 [100]

Explanation:

Let us take the volume of block is x.

Since, the block is floating this means that it is in equilibrium. Formula to calculate net force will be as follows.

$F_{net} = Buoyancy force(F_{b}) - weight force(w)$