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IceJOKER [234]
3 years ago
7

If you could help it would be awsome!!!!!

Chemistry
2 answers:
n200080 [17]3 years ago
8 0

Answer:

1. 2 and 1=2

2. 2 and 1=2

3. 2 and 1=2

4. 4 and 1=2

5. 2=2 and 1

6. 2 and 3=2

7. 2=4 and 1

8. 3 and 1 =2

MArishka [77]3 years ago
3 0

Answer:

1. _2_H2 + ___ O2 → _2_ H2O

2. _2_ Mg + ___ O2 → _2_ MgO

3. _2_ Li + ___ F2 → _2_ LiF

4. _4_ K + ___ O2 → _2_ K2O

5. _2_ H2O2 → _2_ H2O + ___ O2

6. _2_ Al + _3_ Cl2 → _2_ AlCl3

7. _2_ Ag2O → _4_ Ag + ___ O2

8. _3_ H2 + ___ N2 → _2_ NH3

Explanation:

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Given the unbalanced equation:
maw [93]

Answer:

Option (2) 2

Explanation:

NO3- + 4H+ + Pb → Pb2+ + NO2 + 2H2O

The equation above can be balance as follow:

There are 3 atoms of the left side and a total of 4 atoms on the right side. It can be balance by putting 2 in front NO3- and 2 in front of NO2 as shown below:

2NO3- + 4H+ + Pb → Pb2+ + 2NO2 + 2H2O

Now the equation is balanced.

The coefficient of NO2 is 2

8 0
3 years ago
The energy produced when nucleons fuse together is called the: Select the correct answer below:
saveliy_v [14]

Answer:

Option C (nuclear binding energy) is the appropriate choice.

Explanation:

  • At either the nuclear scale, the nuclear binding energy seems to be the energy needed to remove and replace a structure of the atom itself into the characterize elements (to counteract the intense nuclear arsenal).
  • Nuclear warheads (bargaining power) bind everything together neutrons as well as protons within an elementary particle.

Some other options in question aren't relevant to the particular instance. So that the option preceding will also be the right one.

7 0
3 years ago
DNA replication results in two identical DNA molecules. What role do DNA helicases have in DNA replication?
PilotLPTM [1.2K]
I'm pretty sure since one chemical can only bind with one other type, um, I think that one side of the DNA helicase helps make the other side?
8 0
3 years ago
Read 2 more answers
How is the number of electrons in an element determined?
elixir [45]

The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.

3 0
2 years ago
Read 2 more answers
A solution is prepare using 45.2 g of an unknown (nonelectrolyte) dissolved in 476.4 g of water. The freezing point depression
Ray Of Light [21]

Answer:

94.4g/mol is molar mass of the unknown

Explanation:

Based on the freezing point depression equation:

ΔT = Kf*m*i

<em>Where ΔT is the depression in freezing point (1.87°C)</em>

<em>Kf is freezing point depression constant of water (1.86°Ckg/mol)</em>

<em>And i is Van't Hoff factor (1 for nonelectrolyte solutes)</em>

<em />

Replacing:

1.87°C = 1.86°CKg/mol*m*i

1.005mol/kg solvent = m

Using the mass of the solvent we can find the oles of the nonelectrolyte:

1.005mol/kg solvent * 0.4764kg = 0.479moles

Molar mass is defined as the ratio between mass of a substance in grams and moles, that is:

45.2g / 0.479mol =

<h3>94.4g/mol is molar mass of the unknown</h3>
6 0
2 years ago
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