What is the final step of the scientific method?

communicating results

collecting data

proving the hypothesis

writing a conclusion

Suppose an nitrogen atom gains two electrons to become an nitrogen ion. what is its electrical charge?

What type of reaction is Mg + H2Cl2 - MgCl2 + H2? (Choose from: synthesis, decomposition, single replacement, or double replacement.)

Which measurement is a object mass

A burning match is an example of a chemical change phase change nuclear change physical change

2. A balloon is dunked into a tank of cold water. How will this affect the size of the balloon?

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)