Write a balanced chemical equation for the standard formation reaction of gaseous dinitrogen tetroxide n2o4.

In which of the following are the symbol and name for the ion given correctly? a) Fe^2+: ferrous ion; Fe^3+: ferric ion b) Sn^2+: stannic ion; Sn^4+: stannous ion c) Co^2+: cobalt (II) ion; Co^3+: cobaltous ion d) Pb^2+: lead ion;

Which phrase correctly describes the outer shell of electrons of each atom in most covalent compounds? A. often the outer shells has eight electrons B. an unstable arrangement of electrons exists for each atom C.

What is the molar mass of BaBr2?

Which of the following selections completes the following nuclear reaction? A gamma ray plus 40 20 calcium becomes 39 20 calcium plus blank. A beta particle A neutron A positron An alpha particle Gamma radiation

A 40.27 g sample of a substance is initially at 24.8 °c. after absorbing 2099 j of heat, the temperature of the substance is 148.5 °c. what is the specific heat (c) of the substance?

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.

In which changes of state do atoms lose energy?

Can you live without body tissue? This is a yes or no question, no explaining required, but you can add it if you want. : D

According to the graph, which activity has used the largest amount of water over the past twenty years?

Tiffany leaves balloons filled with helium gas inside her car in on a sunny day when she returns to her car some some of the balloons are much larger and a few have popped explain what happened