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Anna35 [415]
3 years ago
8

PLEASE ANSWER ALL

Chemistry
1 answer:
olchik [2.2K]3 years ago
7 0

1.) K, N, and O

2.) Fe and O are unbalanced

3.) a

4.) Its already balanced

5.) I belive it is 2Cr+Cl2 -> CrCl3

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What is the volume of as sample that has a mass of 40.0 g and a density of 4.30 g/mL?
kati45 [8]

Explanation:

density = mass/volume so volume = mass/density = 40/4.30

4 0
3 years ago
If 0.0262 mol of cacl2 is dissolved in water to make a 0.520 m solution, what is the volume of the solution?
Oduvanchick [21]
Cacl2  dissolve   in  water   according  to the  following  equation

Cacl2 + H2O  =  Ca(OH) + Hcl
Volume=  moles/molarity
  The  reacting  ratio    between CaCl2  to  Ca(OH)  is   1:1
therefore  moles  of  solution   is  also  0.0262  moles hence  volume   is  =
0.0262mol/  0.52mol/l =  0.0504L  or50.4ml
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What is the percent of oxygen in H2O2?
Effectus [21]

Answer:

94%

Explanation:

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7 0
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D. Cells from a dogs paw
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What are the charges of families 1, 2, & 13 (boron family) if/when they become Ions
Natalka [10]

Answer:

Explanation:

Group one elements are alkali metals. All alkali metal have one valance electron. They loses their one valance electron and from cation with charge of +1.

Charges on group one.

Hydrogen = +1

Lithium = +1

Sodium = +1

Potassium = +1

Rubidium = +1

Cesium = +1

Francium = +1

Group two elements are alkaline earth metals. All alkaline earth metal have two valance electron. They loses their two valance electron and from cation with charge of +2.

Charges on group two.

Beryllium = +2

Magnesium = +2

Calcium = +2

Strontium = +2

Barium= +2

Radium = +2

Group 13 elements are boron family. All elements have three valance electrons. They loses their three valance electron and from cation with charge of +3.

Charges on group 13.

Boron = +3

Aluminium = +3

Gallium = +3

Indium = +3

Thallium= +3

Group 13 elements are also shows +1 charge by losing one valance electron.

8 0
3 years ago
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