The formula for cocaine is C17H21N04. What is the percentage of carbon in the

compound?

(a) 4.62%

(b) 6.99%

21.1%

(d) 67.3%

Give examples of land features that are formed by water.

Calculate the grams of solid product and excess reagent when 2.50 grams of barium chloride is mixed with 4.00 grams of magnesium sulfate. Calculate the grams of solid product when 2.

Atoms contain three types of particles. in the nucleus there are positively charged protons as well as neutrons which have no charge. orbiting the nucleus are negatively charged nucleus. previous next

245 g water sample initially at at 32 oC absorbs 17 kcal of heat. What is the final temperature of water?

It takes 46 ml of 0.124 m koh to neutralize 28.1 ml of h2so4 solution. what is the concentration of the h2so4 solution? answer in units of moles/liter.

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3

A chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be most affected by this

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles