A substance which is made up of identical atoms is a (n):

chemical

element

compound

alloy

How many moles are in 226 g of Fe (NO2) 2?

The formula of copper sulfide is CuS but the formula of copper sulfate is CuSO4. State and explain the names of the compounds with the formulae Na3P and Na3PO4. Na3P: Na3PO4: explanation:

Momentum is a measure of the mass motion force or weight of an object

1. In any nuclear reaction, nuclei are transformed in some way. True False 2. Two fissionable substances commonly used in nuclear reactors and nuclear weapons include uranium-235 and plutonium-239. True False 3.

A155-g sample of a unknown substance was heated from 25.0°C to 40.0°C. In the process, the substance absorbed 5696 J of energy. What is the specific heat of the substance?

The Calvin cycle is another name for the

When a solution is considered to have a high concentration of hydrogen ions (H+) is also considered to be? a) acidic b) basic c) neutral d) hot

Why does the sky change colors at sunset? 1 because the sun changes colors 2 because the atmosphere reflects colors 3 because long wavelengths are scattered the least 4 because short wavelengths are scattered the least

Consider the reaction N2 (g) + 3 H2 (g) 2 NH3 (g), which is exothermic as written. What would be the effect on the equilibrium position of adding N2 (g) ?

According to Table I, which equation represents a change resulting in the greatest quantity of energy released? 1. 2C (s) + 2H2 (g) - > C2H4 (g) 2. 2C (s) + 3H2 (g) - > C2H6 (g) 3. N2 (g) + 3H2 (g) - >2NH3 (g) 4. N2 (g) + O2 (g) - > 2NO (g)