3. After an IV bolus dose of 500 mg of a drug, the following data were collected: (first order elimination) Time (hrs) Cp (mcg/ml) 1 64 2 3 48 34 Determine the following: a) Co b) Rate constant c) Half-life 4 25 6 8 10 14 7.8 4.2

Gypsum is the hydrate of calcium sulfate, CaSO4 · 2 H2O.  It is the primary material in sheet rock, used to make walls in houses. If you heat 21.05 g of the hydrate and drive off the water, what is the weight of the anhydrous salt remaining?  Report your response to the proper degree of certainty and include the correct unit symbol (i.e., g, mL, km, etc.).

The relationship between heat transfer and change in temperature is given by Q = mcAt, where c is specific heat capacity. Under what conditions will C = Q? 1 kg ΔΤ AT = 1°C = Om 10 g ΔΤ AT = 10 °C Om 100 g AT = 10 °C Om 1 g ΔΤ AT = 10 °C Om = 1g AT = 1°C

help with physical chemistry

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B с D H :0: H | || | H с C -C-H 174 H H H chemical symbol, chemical formula or Lewis structure H H H | | C I 1 I H H H (II | Ag - Ar - :O: -O-H boiling point (Choose one) (Choose one) ✓ (Choose one) (Choose one) ✓