How many molecules are in 9.8 grams of calcium

Answers

Answer 1

Answer: Hmm
One mole of calcium is usually equal to 40 grams so divide 9.8 by 40 which would be 4.0 molecules

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Properties that do not depend on the amount of matter present are called _________________.a.intensive property
b. extensive property

Answers

the answer is b) extensive just took the test.

Answer:

a.intensive property

Explanation:

Properties that do not depend on the amount of matter present are called

But B answer is not correct

chloetoder is wrong answer

At constant volume, if the Kelvin temperature of a gas is doubled, the pressure of the gas is halved.A. True
B. False

Answers

False
I got this question right on the test

Answer:

False

Explanation:

Because if Kelvin temperature gas is doubled, the pressure would not change

Which statement about a system at equilibrium is true?(1) The forward reaction rate is less than the reverse reaction rate.(2) The forward reaction rate is greater than the reverse reaction rate.(3) The forward reaction rate is equal to the reverse reaction rate.(4) The forward reaction rate stops and the reverse reaction rate continues.

Answers

Answer: Option (3) is the correct answer.

Explanation:

A reaction in which the concentration of reactants equal to the concentration of products is known as an equilibrium reaction.

For example, $Ca(OH)_(2)(s) + H_(2)O(l) \rightleftharpoons Ca^(2+)(aq) + 2OH^(-)(aq)$

Therefore, we can also say that in an equilibrium reaction rate of forward reaction becomes equal to the backward reaction.

The true statement about a system at equilibrium is that the forward reaction rate is equal to the reverse reaction rate.

What is equilibrium state?

Equilibrium state is that state in which the concentration of reactant as well as of producrs are constant. i.e. not changes.

Equilibrium state of any reaction will be represented by the double headed arrow as:

A + B ⇄ C + D

Given reaction defines that rate of forward reaction is equal to the rate of the backward reaction.

Hence option (3) is correct.

To know more about equilibrium state, visit he below link:

brainly.com/question/1495850

505 Kl expressed in liters

Answers

505000.0 L answer...

Planck's constant relates the Joules of energy absorbed/released by matter to the:A. atomic number of the element

B. observed wavelength of light

C. speed of light

D. mass of the particulate matter

Answers

Answer: B. observed wavelength of light

Explanation: The relation of Planck's constant relating the Joules of energy absorbed/released by matter is usually used to determine the energy of the photon. The mathematical expression is -

E= h c / $\lambda$

Thus as we can observe that the energy is directly proportional to the speed of light and inversely proportional to the wavelength of the light.

Thus , we can say that Planck's constant relates the Joules of energy absorbed/released by matter to the observed wavelength of light.

The right answer for the question that is being asked and shown above is that: "B. observed wavelength of light" Planck's constant relates the Joules of energy absorbed/released by matter to the B. observed wavelength of light

approximately how many grams of sodium chloride (NaCl) are required to prepare 500. mL of 3.00 M solution

Answers

First convert mL to L:
(500. mL)/(1000L) = .500L

Then convert molarity to moles:
(3.00M)(.500L) = 1.5mol NaCl

Then convert moles of NaCl to grams of NaCl by multiplying it by its molar mass:
(1.5mol NaCl)(58.44g/mol NaCl) = 87.66g NaCl are needed

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Destructive forces can include floods, landslides, tornadoes, tsunamis, wildfires andvolcanoes.TrueFalse