Which of the following is an example of an irreversible physical change? a. boiling soup b. burning wood c. freezing water d. cracking an egg

A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 101.4kPa if P (He) = 68.7kPa and P (CO2) = 1.4kPa?

Which postmortem parameter reaches a maximum at 12 hours and is gone within 36 to 48 hours?1. rigor mortis2. cloudiness of the eyes3. livor mortis4. algor mortis

A package contains 1.33 lb of ground round. If there's 29% fat, how many grams of fat are in the round? I got 175 g but the textbook says the answer is 91 g of fat. How?

How can you create low pressure in a capped bottle?

Which animal product is least efficient at converting feed consumed into the final product?

Where does geothermal energy come from? A. sunlight B. the oceans C. the land D. inside Earth E. wind

Dimethylnitrosamine (CH3) 2N2O, is a carcinogenic formed in foods from nitrite ions used as preservatives. Calculate each of the following for this compound. Show all work for full credit. a. molar mass b. What is the % N

Does biomass energy come from petroleum?

What type of bond would occur between carbon (C) and nitrogen (N) ? A. Metallic bond B. Ionic bond C. Paired bond D. Covalent bond

Consider a reaction of chemicals depicted as a + b → c + d. suppose reaction of 21.8 grams of a with 40.7 grams of b gave 31.8 grams of c. however, the theoretical yield of c for this reaction was 49.9 grams.