What is the most abundant gas in Earth's present day atmosphere?

methane

oxygen

carbon dioxide

nitrogen

Marie Curie was the recipient of two Nobel Prizes-a shared prize in physics and an individual prize in chemistry. Her chemistry prize was for discovering two new elements, polonium and radium.

If two nonmetals with the same electronegativity bond, what type of bond will form? A. Metallic bond B. Non polar ionic bond C. Ionic bond D. Non polar covalent bond

Thermal energy can be transferred by conduction, convection, or radiation. You can see examples of these types of transfers all around you.

Household vinegar is a solution of acetic acid (HCH3COO) in water. Most vinegars contain 5% acetic acid by volume. What volume of acetic acid is present in a 0.250 L bottle of vinegar?

Which of these equations correctly expresses the self-ionization of water? A) Upper H subscript 2 upper O superscript plus upper H subscript 3 upper O superscript plus double-headed arrow upper H subscript 2 upper O plus upper O upper H superscript

What is the actual yield if only 50% of a theoretical yield of 200g is formed. A.) 100g B.) 75g C.) 120g D.) 140g

Hydrogen sulfide gas and sulfur dioxide gas react to form solid sulfur and water. If 10.0g of gaseous hydrogen sulphide is mixed with 10.0g of gaseous sulfur dioxide, how many grams of solid sulfur can form?

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923