Directions: Use the following formulas to answer the following questions. Show Work!
P. T, =P T P. V. = P2V2 D = m/v P = F/a
1. A sample of xenon gas has a volume of 0.98 liters when the temperature
is 28.0 degrees celsius. The pressure is held constant but the
temperature is decreased to 17.0 degrees celsius. What is the new volume
of the gas?

Who discovered a pattern to the elements in 1869?

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?

A155.0 9 piece of copper at 182 °c is dropped into 2500 g of water at 23.9 °c. (the specific heat of copper is 0.385 1/9°c.) calculate the final temperature of the mixture. (assume no heat loss to the surroundings.)