(99% of the total mass). 49% of carbon, 44% of oxygen, 6% of hydrogen, 0.1-0.3% of nitrogen.
D. Salt and water
Explanation:
Acid + Alkali -> Salt + water
Answer:
Divide the mass of the compound in grams by the molar mass you just calculated. The answer is the number of moles of that mass of compound
Explanation:
Answer: 996 mmHg
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number
of particles.
According to the ideal gas equation:

P = Pressure of the gas = ?
V= Volume of the gas = 25.5 L
T= Temperature of the gas = 13°C = (273+13) K = 286K
R= Gas constant = 0.0821 atmL/K mol
n= moles of gas= 1.42
(760mmHg=1atm)
Thus pressure of this gas sample is 996 mm Hg.
<span>Permeable means that a material is full of tiny, connected airspaces that allows water to seep through it.</span>