Define element and compound. explain the difference between an element and a compound.

The amount of force applied per unit area is known as which of the following? pressure power vector volume

A gas that has a volume of 28 liters, a temperature of 45 °C, and an unknown pressure has its volume increased to 34 liters and its temperature decreased to 35 °C. If I measure the pressure after the change to be 2.

Which process is an oxidation? A] 2 H + (aq) + CO32 - (aq) H2O (l) + CO2 (g) B] Fe3 + (aq) Fe2 + (aq) C] 2 CrO42 - (aq) + 2 H + (aq) Cr2O72 - (aq) + H2O (l) D] Ba2 + (aq) + CrO42 - (aq) BaCrO4 (s) E] MnO2 (s) MnO4 - (aq

Identify and apply observations, inferences, and predictions in a lab setting.

Molecular energies can be expressed as the sum of 4 components: translational, rotational, vibrational, and electronic. Let these be represented as eTr, eRo, eVi, eEl.

Carbon exists in nature as three isotopes. Given the atomic masses and relative abundance of the isotopes, what is the average atomic mass of carbon?

What is the correct value for Avogadro's number? A. 6.022 x 10^23 B. 6.023 x 10^22 C. 6.022 x 10^33 D. 6.022 x 10^2.3 E. none of the above

Fossil fuels are considered useful to humans because they are

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei

An atom that has 13 protons and 15 neutrons is an isotope of the element? How can I count it?