Answer:
5150 kPa
Explanation:
Given that,
Initial volume, V₁ = 100 mL
Initial pressure, P₁ = 103 kPa
Final volume, V₂ = 2 mL
We need to find the new pressure of the gas. The relation between the pressure and the volume of gas is given by :

So, the new pressure is 5150 kPa.
Answer:
D.
Explanation:
Because protons and neutrons make up the mass of an atom.
Answer: The coefficient must be 3.
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The number of atoms of each element has to be same on both sides, thus the balanced chemical reaction will be:

Thus a coefficient of 3 should go in front of
to balance calcium (Ca).
Answer:
3.27 x 10⁻¹⁶ grams
Explanation:
moles Au = 1.00 x 10⁻⁶ Atoms / 6.02 x 10²³Atoms / mole = 1.66 x 10⁻¹⁸ mole Au
grams Au = 1.66 x 10⁻¹⁸ mole Au x 196.97 grams Au/mole Au
= 3.27 x 10⁻¹⁶ grams Au