The pressure of a sample of gas of constant volume is 2.0 atm at 30.ºC. What is the pressure of this sample at 20.ºC?

Which information must be known about a compound to find the molecular formula from the empirical formula? densityformula masspercent compositionmole ratio

Which statements describe a mushroom's niche? Check all that apply. Mushrooms are a type of fungus. Mushrooms are often found in moist areas. Mushrooms break down dead plants. Mushrooms may only live a few days. Mushrooms reproduce through spores

What functional groups are present in acetaminophen?

How many roses are in 93.8 dozen?

Which of the following compounds is the most soluble in water? Hint: Look for functional groups that will form H-bonds with water. CH3CH2CH2CH2CH3 OHCH3CH2OCH2CH2CH3 CH3CH2CH2CH2CH2OH OHCH2CH2CH2CH2CH2OH

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.