On any given night, provided that the sky is clear, all of the planets which can be seen with the naked eye will not be visible at the same time. This is because they all have different

A) moons

B) orbits

C) shapes

D) sizes

Atoms are so small that aboit 7.5 carbon atoms could fit into the period at the end of this sentence.

What is the volume of 0.1 mole of methane (CH4) ? (One mole of any gas occupies 22.4 L under certain conditions of temperature and pressure. Assume those conditions for this question.) 2.2 L 20 L 22.4 L 44.8 L

Explain why hydrogen and oxygen are considered elements whereas water is not considered an element.

How many formula units of baking soda (sodium bicarbonate) are in 2.60 tsp? (1 tsp ≈ 7.20 g nahco3) ?

Which statement best describes science? A) science can answer any and all questions B) science cannot answer questions about the natural world C) science cannot answer questions about what people should do D) science can answer only mathematical

The sun's inner core is the hottest part of the sun true or false

When light from the sun warms the ground, the transfer of heat energy is called A) conduction. B) power. C) radiation. D) reflection.

What is alkyl hydrogen sulphate

What is the physical state of each of these materials at room temperature? a. gold b. gasoline c. oxygen d. neon e. olive oil f. sulfur g. mercury

What is one unexpected problem associated with cell phone use? A. It decreases the efficacy of your peripheral vision. B. It distracts your hearing from events on the roadway. C. It causes you to misjudge distances.