Achange in which factor will affect the rate of reaction only when gases are involved?

temperature

pressure

surface area

concentration

A blank observation is when you describe something

Which of these accurately describes the products of a reaction? substances that are used in a reaction new substances that are present at the end of a reaction substances that do not participate in a reaction substances that were not used up in a

At 850°C, CaCO3 undergoes substantial decomposition to yield CaO and CO2. Assuming that the ΔH o f values of the reactant and products are the same at 850°C as they are at 25°C, calculate the enthalpy change (in kJ) if 68.

which of the following statements is never true? A. rectangle is a parallelogram B. Trapezoid is a rectangle. C.

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters? 1.5 moles 2 moles 3 moles 6 moles

Write a mathematical equation showing that pressure (P) divided by temperature (T) remains equal to a constant (k).

Which molecule has a structure that is most like aspirin? propene octyne benzene butane

The half-life of radioactive element krypton-91 is 10 seconds. if 16 grams of krypton-91 are initially present, how many grams are present after 10 seconds? after 50 seconds?

Which part of the electromagnetic spectrum has a shorter wavelength than ultraviolet light? television x-rays microwave infrared light

5.0 g of NaCl is dissolved in water, and the solution is brought to a final volume of 150 mL. What is the molarity of this solution?