A vessel contains three gases at these partial pressures: 100 torr oxygen, 300 torr helium, 200 torr neon

The mole fraction of helium is

0.10

0.50

0.33

0.17

none of these

What is a compound? a) a combination of two or more substances that are not chemically combined b) a combination of two or more elements that are combined in a certain ratio

2. What is one advantage and one disadvantage of sexual reproduction? 3. What is one advantage and one disadvantage of asexual reproduction?

What is the molecular formula for glucose?

Which elements on the periodic table have the highest ionization energies? A) Nonmetals in the upper right B) Metals in the lower left C) Metalloids, in the center D) Synthetic elements at the bottom

Describe the properties of microwaves using some of the prompt words listed below

Which tool is most suitable for a chemist to measure the mass of a liquid

What is the equation adheres to the law of conservation of matter

What ironic contrast does Vonnegut include in this scene? George tells his wife to forget sad things, but readers would expect George and Hazel to want to remember their son.

When the Sun is in its maximum solar cycle, which of the following occurs? A. One CME is produced every five days B. There is an unpredictable amount of energy C. Up to three CMEs are created in one day D. Protons and neutrons accelerate

How many daughter cells are produced in meiosis?