Hydrogen gas has been suggested as a clean fuel because it produces only water vapor when it burns. if the reaction has a 78.0% yield, what mass of hydrogen forms 545 kg of water?

1. There are two days every year when daytime and nighttime are equal. These days happen when the Sun appears in a special position in the sky. The exact moment when the Sun appears in this position is called an equinox (EE-kwuh-noks).

Which direction does an object move if a force is applied to it?

All scientists try to base their conclusions on? expert opinions? data and measurements? evaluation of historical records? popular opinion?

1. Ionic compounds generally form solids because:

Which of the following changes will likely increase the solubility of a solid solute but decrease the solubility of a gaseous solute? A. Increasing the molecular mass of the solute B. Increasing the temperature C. Decreasing the concentration D.

Whats the main difference between a double replacement reaction and a single replacement

When is the absorption spectrum of an electron generated?

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration.

Which describes the volume of 1 mol of gas at standard temperature and pressure? ER The volume is greater for a larger mass of gas. The volume is the same for any gas. The volume depends on the size of the container.

When studying historical geology, which type of rock provides the most useful evidence for uncovering what occurred? metamorphic igneous basalt igneous granite sedimentary