How is an atomic mass unit defined?

A student measures the mass of a beaker filled with corn oil. the mass reading averages 215.6 g. the mass of the beaker is 110.4 g. a. what is the mass of the corn oil? b. what is the density of the corn oil if its volume is 114 cm3?

Which particle of the atom has a positive charge? A. proton B. electron C. nucleus D. neutron

What is the mass of 5 moles of Fe2O3?

Consider the reaction: Br2 (g) + Cl2 (g) → 2BrCl (g) Given an initial mass of 14.21 g Br2, an excess of Cl2, and assuming that all of the reactant is converted to product (s), and none is lost, calculate the mass (g) of BrCl produced by the reaction.

If you pour water out from a bucket, does the density of the remaining water change?

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.