Is it always possible to identify something as an element compound pure substance or mixture just by looking at it

Oil became a major resource with the diffusion of motor vehicles early in the 1800s. Oil became a major resource with the diffusion of motor vehicles early in the 1800s. True False

Justin is an artist using a hammer to make a large, thick statue out of tin. Which property of tin allows Justin to make an interesting shape?

6.3 mol S x (/) = g S

Which of the following is necessary to determine the rate of a reaction using the rate law? A. The starting temperature of the reaction B. The activation energy of the reaction C. The concentrations of the reactants D.

Sodium is an explosive metal. Chlorine is a poisonous gas. You would expect a compound made of sodium and chlorine to be very dangerous. very explosive and poisonous. very closely related to the element that makes up the majority of the compound.

A noncompetitive inhibitor. binds to the active site of an enzyme a. b. increases the rate of enzyme action alters the primary structure of the enzyme c. d. none of these

True or false? The radioactive wastes produced by nuclear fission remain dnagerous for dozens of years

Determine the number of moles of Krypton contained in a 3.25 liter gas tank at 5.80 atm and 25.5 °C.

In the reaction 2co (g) + o2 (g) â 2co2 (g), what is the ratio of moles of oxygen used to moles of co2 produced? select one:

A log's mass is 5 kg. After burning, the mass of the ash is 1 kg. Explain what may have happened to the other 4 kg of mass.