the compound diborane can be used as a rocket propellant. what is the percent composition of boron in diborane

A few pieces of dry ice, CO2 (s), at - 78°C are placed in a flask that contains air at 21°C. The flask is sealed by placing an uninflated balloon over the mouth of the flask.

In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?

Which of the following occurs due to static electricity? Question 9 options: lightening sunlight star light moon phases

Use the periodic table to select the element from the drop-down menu that has the correct relative electronegativity.

What is the difference between fats and oils? A. Oils are lipids and fats are proteins. B. At room temperature, fats are solid and oils are liquid. C. Fats are lipids and oils are carbohydrates. D. Fats are triglycerides and oils are waxes.

What's the ratio of 80% hydrogen

Why is warmer near earth surface

A platinum wedding band contains 0.077 mol of platinum. How many atoms of platinum are in the 15-gram platinum wedding band?

In an ecosystem where 500,000 kcal of sunlight is available for producers, approximately how much chemical energy will be contained in secondary consumers?

Question 6 if a gas pressure gauge reads 32.0 psi, what is the pressure in inches of mercury? 165 in. hg 15.7 in. hg 65.1 in. hg 32.0 in. hg 6.19 in. hg