If there is a bar of iron and you heat it up will it weigh the same as it did before

A boy with pneumonia has lungs with a volume of 1.7 L that fill with 0.070 mol of air when he inhales. When he exhales, his lung volume decreases to 1.3 L. Enter the number of moles of gas that remain in his lungs after he exhales.

Use the drop-down menus to choose the type of investigation that best completes each statement. investigations show relationships that do not always indicate cause-and-effect relationships.

What is a number written in front of a chemical formula

How many protons and neutrons are in one atom of / begin{matrix}30//14/end{matrix} 30 14 si?

What compound consists of 0.248 g magnesium, 0.655 g sulfur, and 1.31 g oxygen

How many valence electrons are in N2O? SeCl2? PBr3?

What force (in newtons) is required to accelerate a body with a mass of 32 kilograms at a rate of 12 m/s2? If a body with a mass of 4 kg is moved by a force of 20 N, what is the rate of its acceleration?

A. draw the structure of the tetrahedral intermediate initially-formed in the reaction shown. reactions of esters with

The water level in a graduated cylinder stands at 20.0 ml before and at 26.2 ml after a 16.74 g metal sample is lowered into the cylinder. what is the density of the sample. what metal is the sample most likely to be

What are the tube feet on a star fish