A chemical reaction gives off 2100 kg of heat energy how many calories

The theoretical yield of ammonia in an industrial synthesis was 550 kg, but only 480 kg was obtained. What was the percentage yield of the reaction?

Does the law of crosscutting relationships involve sedimentary rock only

Martin mixed sulfur (a yellow solid) with iron filings (a black solid) in a ceramic dish called a crucible. Then he separated them using a magnet. What kind of a change is this? change in state mixing and separation replacement synthesis

Which statement accurately describes what happens when ice melts in terms of energy? A) The ice releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from solid to liquid.

What do seismologists use to describe the amount of magnitude of earthquakes?

What is the total pressure when 0.400 g of H2, 2.00 g of N2, and 10.5 g of CO2 are injected into a 10.0 liter flask at 273 K?

The balanced chemical equation for the combustion of methane is: CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) Which of the following statements concerning this chemical equation is/are correct? 1.

In one kind of nuclear reaction, two nuclei fuse, or join together, to form a larger nucleus. This kind of reaction happens only at very high pressures. Explain why such high pressures are necessary to cause these reactions to occur.

Check the approach to obtain the correct conversion equation. Use the temperature in °F to find the temperature in °C. °C

What is the volume of a gas at 50.0 Celsius and. 80 atm if there are. 75 moles of a gas present?