Which of these mixtures are heterogeneous? 1. brass (an alloy of copper and zinc) 2. granite (a type of rock with multicolor spots) 3. oil and water 4. salt and water

Name at least 3 celestial bodies (space things) and briefly describe them

Identify examples of the list below. Check all that apply

Which biological career professionals were most likely involved in monitoring and enforcing the protection of the bald eagle?

What initial temperature of the copper metal which equal to the temperature of the coffee? Mass of metal = 29.8801 g T i = 18.2 degree Celsius T f = 20.1 degree Celsius Specific heat 0.384 J/g degree Celsius

In a first-order reaction, how does the rate change if the concentration of the reactant decreases to one-third its original value?

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.