The answer is <span>B. Fusion occurs inside the sun. It creates light and heart that sustain life on earth.
The Sun creates its own energy through fusion. This also happens in larger stars as well.
Have a good day! =)</span>
Kinetic energy is associated with the motion of an object.
Since the object is at rest on the ground, its velocity is zero.
Since kinetic energy is directly proportional to the square of velocity, kinetic energy of the ball on the ground is zero.
Answer: C. HNO3 and NaOH
Explanation:
Arrhenius acid produces hydogen ion (H+) when dissolved in water. An example of Arrhenius acid is HNO3.
Arrhenius base produces hydroxyl ion (OH-) when dissolved water. An example of Arrhenius base is NaOH.
Answer:
0.067M H3PO4
Explanation:
H3PO4 reacts with NaOH as follows:
H3PO4 + 3NaOH → 3H2O + Na3PO4
<em>Where 1 mole of H3PO4 reacts with 3 moles of NaOH</em>
To solve trhis question we need to find the moles of NaOH required. With the chemical equation we can find the moles of H3PO4 and its concentration as follows:
<em>Moles NaOH:</em>
50.0mL = 0.0500L * (0.20moles /L) = 0.0100 moles NaOH
<em>Moles H3PO4: </em>
0.0100 moles NaOH * (1mol H3PO4 / 3mol NaOH) = 0.00333 moles H3PO4
<em>Concentration:</em>
0.00333 moles H3PO4 / 0.0500L = 0.067M H3PO4
Answer:
In 12.6g of there are 0.29 moles of and molecules of
Explanation:
First you should find the molar mass of the :
Then you should write the conversion factor using the molar mass:
So, there are 0.29 moles of in 12.6g of .
Finally to find the number of molecules, you should use the Avogadro´s number:
There are moles of in 12.6g of