Other Chemistry Answers

What are the mole fractions of hydrochloric acid (HCI) and water in a 20% (w/w) aqeous HCl solution?

Molality & Molarity 1.

Calculate the molality of a solution containing 10.8g of ethylene glycol (C2H6O2) in 360g of water.

Mole Fraction 1. Calculate the mole fraction of each component of a solution containing 65 g of ethanol (C₂H6O) in 350g of water.

A solution is prepared by dissolving 20 mL of pure hydrogen peroxide (H₂O2) in enough water to make 200mL of solution. What is the concentration of the H₂O2 solution?

What happens if the core body temperature is too high? 

b. the capillaries move closer to the surface of the skin

a. the blood vessels supplying the capillaries dilate

d. the capillaries constrict

c. the capillaries dilate

A reaction mixture for PCR consists of ____________ 

b.primers in a limited amount

d. a region complementary to the sequence to be amplified

a. heat unstable polymerase

c. deoxynucleoside triphosphate (dNTPs)

What is the best definition of homeostasis? 

b. maintenance of a constant internal environment

c. keeping a constant temperature

a. getting rid of waste

All options are correct except: 

c. carbon dioxide is transported to the lungs

a. carbon dioxide is produced in very small quantities in living organisms

b. carbon dioxide is produced by the cells respiring aerobically

d. carbon dioxide is taken in small quantities

what mass of lead (ii) iodide will be formed when 20.0 g of lead (ii) nitrate is added to 33.0g of potassium iodide? which is the limiting reactant?

Consider a glycolic acid (HOCH2COOH) and glycolate (HOCH2COO-) buffer system. Write the chemical equation representing

The glycolic acid-glycolate equilibrium

H₃PO₄ + Mg(OH)₂ → Mg₃(PO₄)₂ + H₂O

What is the mass of 5.45 x 10 ^-3 moles of glucose (C ₆H ₁₂O ₆)?