Answer: 20*38
Wave speed = 760m/s
If 1000 ml (1 L) of CH₃COOH contain 1.25 mol
let 250 ml of CH₃COOH contain x
⇒ x =
= 0.3125 mol
∴ moles of CH₃COOH in 250ml is 0.3125 mol
Now, Mass = mole × molar mass
= 0.3125 mol × [(12 × 2)+(16 × 2)+(1 × 4)] g/mol
= 18.75 g
∴ Mass of CH₃COOH present in a 250 mL cup of 1.25 mol/L solution of vinegar is <span>18.75 g</span>
Answer: gas particles that are in constant motion and exhibit perfectly elastic collisions
Explanation:
Answer:
the density of CO2 gas at STP is 1.96 g/l.
Answer:
Metalloids have properties of metals and non-metals.
Explanation:
A metalloid is a type of chemical element which has properties in between, or that are a mixture of, those of metals and nonmetals.
The six commonly recognized metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium.
Metalloids have a metallic appearance, but they are brittle (nonmetal property) and only fair conductors of electricity. Chemically, they behave mostly as nonmetals. They can form alloys with metal.
Most of their other physical properties and chemical properties are intermediate in nature.
That means Metalloids have properties of both metal and nonmetal.