Balance the following redox equation using the oxidation-number-change method. Show your work, describing each step.

HNO3 + H2S - -> S + NO + H2O

Which of the following do not involve a direction Check all that apply. A. Velocity B time C acceleration D distance Note: chose 2 answer

Calculate the normality of NaOH solution Formed by dissolving 0.2 gm NaOH to make 250 ml solution

Which method would be effective for separating salt and water in a mixture? A. evaporation B. using a magnet C. observing color differences D. chromatography

Fluorine and Nitrogen react to form a covalent molecule. Which best describes the molecule they will make? There are 3 Nitrogens and 1 Fluorine. Nitrogen will be the central atom. There are 3 Fluorines and 1 Nitrogen.

What will happened to the rock cycle without erosion

Calculate the formula mass for each compound. a. NO2 b. C4H10 c. C6H12O6 60. Calculate the formula mass for each compound. a. MgBr2 b. HNO2 c. CBr4 d. Cr (NO3) 3

How many electrons will calcium gain or lose when it forms an ion?

Which statement describes thermal energy? the energy that is associated with electric fields the energy that is stored in chemical bonds the energy that is associated with the pull of gravity the energy that is associated with temperature

Give the formula %error = theoretical value - experimental value / theoretical value * 100 calculate the percent error for the experiment.

A baker touches a pie right after taking it out that of me which statement best explains why the pie feels hot