ABOUT IT

Why does a hot water bottle feel warm?

Molecules in the hot water bottle are

moving faster than molecules in the skin.

Molecules in the skin are moving faster

than molecules in the hot water bottle.

DONEN

Balance this redox reaction occurring in acidic media: Cr2O7[2-] (aq) + Cl[-] (aq) Cr[3+] (aq) + Cl2 (g)

For which of the following processes does the entropy of the system increase? (a) the ripening of a banana, (b) dissolution of sugar in a cup of hot coffee, (c) the reaction of nitrogen atoms to form N2 molecules at 25 ∘C and 1 atm, (d) lightning,

Determine the simplest formula for gold chloride if a 0.303 g sample of gold chloride reacts with agno3 to produce gold nitrate and 0.430 g of agcl. (hint: given that 0.430 g of agcl are formed in the reaction one must assume all the chloride in 0.

Which is the best description of what happens in a chemical reaction? A. Atoms rearrange. B. Atoms change into other atoms. C. Matter is destroyed. D. Matter is formed.

What is the process in which two atomic nuclei combine to form a larger nucleus releasing huge amounts of energy

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.