An automobile tire at 23°C with an internal volume of 25.0 L is filled with air to a total pressure of 2.18 atm ( 32 pounds per square inch).
Answer:
Option (c).
Explanation:
Cellulose is one of the most important carbohydrate of the plant that provide structural framework to the plant cells. Cellulose is made of the monomer of the glucose that are linked through the beta glycosidic linkages.
Although cellulose contains large number of glucose but it cannot be used as the nutrient source for humans. Humans and other vertebrates lacks the enzyme cellulase that is required for the digestion of cellulose. Cellulose cannot be broken down in the human body.
Thus, the correct answer is option (c).
Answer:
Molarity = 2.54 mol.L⁻¹
Solution:
Molarity is the amount of solute dissolved per unit volume of solution. It is expressed as,
Molarity = Moles / Volume of Solution ----- (1)
Data Given;
Mass = 187 g
Volume = 250 mL = 0.25 L
First calculate Moles for given mass as,
Moles = Mass / M.mass
Moles = 187 g / 294.185 g.mol⁻¹
Moles = 0.6356 mol
Now, putting value of Moles and Volume in eq. 1,
Molarity = 0.6356 mol ÷ 0.25 L
Molarity = 2.54 mol.L⁻¹
First, from reliable sources we get the densities of both the copper and lead. This will give us 8.96 g/cm3 and that of lead is 11.34 g/cm3. We assume that 1 cm3 of this certain mixture is composed of x cm3 of copper and y cm3 of zinc. Such that,
x + y = 1
and 9.60 = x(8.96) + y(11.34)
The values of x and y are 0.73 cm3 and 0.27 cm3. The masses are obtained by multiplying these values by the densities giving us with 6.54 g and 3.06 g.
