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Chemistry

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Marielle Hane

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Cards in this guide (14)
How is electroplating done

the metal on which electroplating is to be done is taken as cathode ( negative electrode) . the metal of which electroplating is to be done is taken as anode ( positive electrode) and the salt solution of the metal of which electroplating is to be done is taken as electrolyte .

example-

if we want to electroplate iron with copper then iron is taken as cathode and copper is taken as anode and electrolyte is copper sulphate.Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes. This is done through the use of copper in a copper sulfate bath.

What does the average atomic mass represent

The average atomic mass represents the weighted average of the masses of the isotopes of the element.

Calculate the number of atoms of O contained in 16.0 pounds of O

16.0 lbs = 7,257 g of O2

Oxygen exists in the gas form as 02

7,257g O2 * 1 mol O2/ 32 g * 2 mol O / 1 mol O2 * 6.022x10^23 atoms/mol

= 2.73E26 atoms of O

How is stoichiometry used

Stoichiometry is used to find the molar ratios between the reactants of a chemical reaction.

Which method of drawing hydrocarbons is the fastest to draw

the stick model method

What kind of information does the activity series of metals give us

It compares how reactive the metals are

It predicts if one metal will replace another metal in a compound

What type of reaction is Zn CuCl2Cu ZnCl2

The reaction Zn + CuCl2 --> Cu + ZnCl2 is a single-replacement reaction.

What is the net ionic equation for the reaction 2kohaq h2so4aq 2h2ol k2so4aq

OH- 2H+ -> 2H2O(I)

ywwww

:)

What reactants is necessary for a combustion reaction

Oxygen apex

What would be the percent yield of the reaction be if the theoretical yield is 11.22 g but the actual yield was 8.67 g

In this case the yield is 77,27 %.

In the reaction mgcl2 plus 2koh mgoh2 mgoh2 plus 2kcl if 3 moles mgcl2 are added to 4 moles koh what determined how much mgoh2 is made

The amount of Koh

Is not a concern regarding the use of corn as a biofuel

The color of corn is different than the color of gasoline or coal

APEX

How would 0.000000728 be written in scientific notation

It is 7.28*10^-7 in scientific notation

The only reactants in a reaction were Zn and HCI. What does the law of conservation of matter say about the products

The product will contain only Zn, H, and CI. -Apex

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