What is matter im confused

A 0.4-m3 rigid tank contains 0.6 kg of N2 and 0.4 kg of O2 at 300 K. Determine the partial pressure of each gas and the total pressure of the mixture. The gas constant for N2 is 0.2968 kPa·m3/kg·K and the gas constant for O2 is 0.2598 kPa·m3/kg·K.

The δg°/' of the reaction is - "8.550" kj ·mol-1. calculate the equilibrium constant for the reaction. (assume a temperature of 25° c.)

4 type of molecular models

1. - Menthol is a flavoring agent extracted frompeppermintoil. It contains C, H, and O. In one combustion analysis, 10.00 mg of the substance yields 11.53 mg H2O and 28.16mg CO2. What is the empirical formula of menthol? 2.

A 0.110 mol sample of an ideal gas occupies 3.50l. what is the volume of 0.250 moles of this gas at the same temperature and pressure?

Which carbonate is most stable to heat? A. Sodium carbonate B. Copper (ii) carbonate C. Zinc carbonate

How many liters of 0.75 M solution can be made using. 336 moles of lead (II) oxide?

Which molecule, when added to a solution, would give the solution the highest ph? A. HCI B. H2SO4 C. KOH D. H2O

All matter has mass and takes up space. True False

What problems must be overcome before fusion can be used to produce energy? A. synthesizing deuterium and tritium and containing the plasma reactants B. achieving high temperatures and containing the plasma reactants C.