Which of the following units can be used to measure the mass of a grain of salt?

A.

milliliters

B.

milliseconds

C.

millimeters

D.

milligrams

Give reason water is solidified by cooling

Its silver tarnishing physical or chemical change.

How much heat must be transferred to 100.0g of water to change its temperature by 35° C?

The balanced chemical reaction for the decomposition of trinitrotoluene (TNT) is 2 C7H5 (NO2) 3 (s) → 7 C (s) + 7 CO (g) 3 N2 (g) + 5 H2O (g) If one mole of TNT decomposes, how many total moles of all products are formed? a. 1 b. 2 c. 11 d. 22 e. 44

Discuss what trophic level humans occupy on an ecological pyramid, and explain what happens to contaminants and environmental pollution (such as mercury) as you move down and up the ecological pyramid (what is this called?)

Which is a product in the following chemical reaction? CH4 + 2O2 → CO2 + 2H2O CH4 H4 H2O O2

How many Mg atoms are present in 170g of Mg

The kinetic theory assumes that collisions of gas particles are perfectly elastic. What does this statement mean?

Roger believes that he is following a healthy regime by taking lots of vitamin E everyday. What property of vitamin E makes Roger's practice potentially unhealthy?

A 68-kg man whose average body temperature is 39°C drinks 1 L of cold water at 3°C in an effort to cool down. Taking the average specific heat of the human body to be 3.