Answer:
p = 260 kilogram/cubic meter
Explanation:
ρ = ![\frac{m}{V} \\](https://tex.z-dn.net/?f=%5Cfrac%7Bm%7D%7BV%7D%20%5C%5C)
= ![\frac{6.5 g}{25mL}](https://tex.z-dn.net/?f=%5Cfrac%7B6.5%20g%7D%7B25mL%7D)
= 0.26 gram/milliliter
= 260 kilogram/cubic meter
Answer: Avogadro's Law
Explanation: It states that the volume of the gas is directly proportional to the number of moles of the gas at constant pressure and temperature of the gas.
A standard solution is a solution (in this case sodium hydroxide) whose concentration (molarity) is known very precisely. <span>The molarity of the sodium hydroxide solution cannot be determined accurately because s</span>olid sodium hydroxide is highly hygroscopic (absorbs water from the air) and cannot be accurately weighed. Sodium hydroxide form sodium carbonate because it absorbs carbon
dioxide from the air.
Answer:
C. +5
Explanation:
Oxygen is always -2. And the sum of the oxidation numbers must be equal to the charge. So:
2x + 7(-2) = -4
2x - 14 = -4
2x = 10
x=5