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babymother [125]
2 years ago
12

1) Look at the graph. What is the independent variable and the dependent variable?

Chemistry
1 answer:
Xelga [282]2 years ago
5 0

Answer:

Independent Variable = Years

Dependent Variable = Number of Mobiles phone owners

Explanation:

Independent variables are plotted on x-axis and the dependent variables are plotted on y-axis.

In given graph the "Years" belong to x-axis hence, years are the independent variables.

Also, "Number of Mobile phones owners" belong to y-axis hence, this number is the dependent variable.

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a chemist dissolves 0.564 moles of manganese (IV) oxide (MnO2) in water, and adds enough water to make 0.510 L of solution. Calc
ladessa [460]

Answer:

The molarity of the solution is 1.1 \frac{moles}{liter}

Explanation:

Molarity is a measure of the concentration of that substance that is defined as the number of moles of solute divided by the volume of the solution.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

molarity=\frac{number of moles of solute}{volume}

Molarity is expressed in units \frac{moles}{liter}

In this case

  • number of moles of solute= 0.564 moles
  • volume= 0.510 L

Replacing:

molarity=\frac{0.564 moles}{0.510 L}

Solving:

molarity= 1.1 \frac{moles}{liter}

<u><em>The molarity of the solution is 1.1 </em></u>\frac{moles}{liter}<u><em></em></u>

4 0
3 years ago
To what pressure must a gas be compressed in order to get into a 3.00 cubic foot
Troyanec [42]

Answer:

133.3atm

Explanation:

Given parameters:

Initial volume  = 400ft³

Final volume  = 3ft³

Initial pressure = 1atm

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we  apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

  Mathematically;

               P₁V₁ = P₂V₂

P and V are pressure and volume

1 and 2 are initial and final states;

   Insert parameters and solve;

                1 x 400  = P₂ x 3

                     P₂  = 133.3atm

6 0
3 years ago
Another name for Group is...
kobusy [5.1K]

Answer:

set, variety, family, species,

Explanation:

7 0
4 years ago
A nuclear chemist measures the mass defect of nickel-56 and finds it to be 0.4667 amu. Based on this number, (a) calculate the n
NNADVOKAT [17]

Answer:

See explanation

Explanation:

Number of protons = 28

Number of neutrons = 28

Mass of each proton = 1.007277 amu

Mass of 28 protons = 28 * 1.007277 amu = 28.203756 amu

Mass of each neutron = 1.008665 amu

Mass of 28 neutrons = 28 * 1.008665 amu = 28.24262 amu

mass defect of nickel-56  = 0.4667 amu

Binding energy = Δmc^2

Binding energy = 0.4667 *(3 * 10^8)^2

Binding energy =4.2 * 10^16 J

Binding energy per nucleon = 4.2 * 10^16 J/56

Binding energy per nucleon = 7.5 * 10^14 J

5 0
3 years ago
1. T or F? An electric field has strength, but no direction.
Anastasy [175]
1:False, it has both

2:Electric potential is the amount of work done to bring the unit positive charge from infinity to that point, while electric potential energy is the energy that is needed to move a charge against the electric field.

3:Towards

4: Answer should be True
6 0
2 years ago
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