Change of state from a solid directly to a gas

How many moles of isooctane must be burned to produce 100 kJ of heat under standard state conditions? Show all of your work.

What Makes the sky blue

Chemical Formula for Coffee?

True or false the sun is a renewable resource

A student fills a paper cup with water and puts in a freezer overnight. When she takes the cup out the next day, she notices that the sides of the cup are pushed out. Why did this happen?

If the half-life of hydrogen-3 is 11.8 years, after two half-lives the radioactivity of a sample will be reduced to one-half of the original amount. If the half-life of hydrogen-3 is 11.

If element X has 25 protons, how many electrons does it have?

How much work is done to raise a 20N box 4m?

Which of the following lists the types of single substances? (Select only one answer) Group of answer choices elements and mixtures suspensions, solutions, and colloids elements, compounds, and mixtures elements and compounds

What is the average mass of a single silicon atom in grams?