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Hatshy [7]
3 years ago
5

How much energy is required to vaporize 2 kg of copper? Use the table below

Chemistry
1 answer:
Mandarinka [93]3 years ago
5 0

Answer:

9460 kj

Explanation:

just did it

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Calculate the Ka for the following acid. Determine if it is a strong or weak acid. HClO2(aq) dissolves in aqueous solution to fo
Talja [164]

Answer:

The value of Ka = 1.1*10^{-2}

It is a weak  acid

Explanation:

   From the question we are told that

             The concentration of [HClO_2]=0.24M

             The concentration of  [H^+]=0.051M

             The concentration of  [ClO_2^-]=0.051M

Generally the equation for the ionic dissociation of HClO_2 is

                HClO_2_(aq) -------> H^{+}_{(aq)} + ClO_2^{-}_{(aq)}

The equilibrium constant is mathematically represented as

                         Ka = \frac{concentration  \ of  \ product  }{concentration \ of \  reactant }

                               = \frac{[H^+][ClO_2^-]}{[HClO_2]}

Substituting values since all value of concentration are at equilibrium

                    Ka = \frac{0.051 * 0.051}{0.24}

                          = 1.1*10^{-2}

Since the value of  is less than 1 it show that in water it dose not completely

disassociated  so it an acid that is weak

                         

               

3 0
3 years ago
Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137 is 30.2 years. How much tim
Aleonysh [2.5K]

Answer:

la primera va con la última

5 0
3 years ago
Which of these household items is powered by alternating current?
AlladinOne [14]

Answer:

C. Hair dryer

Explanation:

Alternating Current

The other kind of electricity is called alternating current, or AC. Power plants produce this

type of electricity. It is carried by large power lines from the plant to your home. When you

plug a TV, a lamp, or a hair dryer into the wall socket, you are using this type of electricity.  

3 0
3 years ago
A student is studying a sample of carbon dioxide gas inside a small syringe. At constant temperature the syringe has a volume of
Soloha48 [4]

The new pressure inside the syringe will be 1.25 atm

<h3>Gas law</h3>

At constant temperatures, the volume of a gas is inversely proportional to its pressure.

Thus:   P1V1 = P2V2

In this case, P1 = 3.0 atm, V1 = 89.6 mL, V2 = 215 mL

P2 = P1V1/V2

                         = 3 x 89.6/215

                              = 1.25 atm

More on gas laws can be found here: brainly.com/question/1190311

4 0
2 years ago
Which shows the correct relationship between the molecular formula and the empirical formula for C2H10N2?
SIZIF [17.4K]
The correct answer is A. molecular formula = 2 x empirical formula

The given compound C2H10N2 is the molecular formula because the ratios of the elements are not reduced into lowest terms (empirical formula). To get the empirical formula, the ratios must be reduced to the smallest possible integral ratio which gives CH5N. As a result, the ratio between both formulas is 2.
3 0
3 years ago
Read 2 more answers
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