Is vinegar a mixture or a pure substance?

What is the density of CO2 at a pressure of 0.0079 atm and 227 K? (These are the approximate atmospheric in Mars)

How is light energy different from both sound and heat energy? A. Light energy can exist independently of matter. B. Light is more energetic when its frequency is higher. C. Sound energy is a wave. D. Heat energy can radiate from an object.

Which fact about the Grand Canyon can be explained by one or more of Steno's principleshe cause of erosion of some layers A. the cause of erosion of some layers B. the type of index fossils found C.

A 50-gram sample has a half-life of 12 days. How much material will remain after 12 days?

How many atoms are in 131.97 liters of water vapor at STP? A) 6.023 * 1023 B) 3.54846 * 1024 C) 3.548 * 1024 D) 1.0645 * 1025

What is the molarity of a solution made with 298g of potassium chloride dissolved in enough water to make 2L of solution?

Why is mass conserved in a chemical change? The energy used in the chemical reaction burns up the extra matter. The compounds are still exactly the same, they just look different.

Where the use of energy is concerned (in scientific sense), when is work done?

Properties of a solution that depend only on the ratio of the number of particles of solute and solvent in the solution are known as: intensive properties extensive properties colligative properties chemical properties

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons? what type of chemical bond can form between an atom with 11 protons and an atom with 17 protons? non-polar covalent ionic hydrogen polar covalent?