What is the total energy change for the following reaction: H2 + I2 - > 2HI?

Given:

H-H bond: 436 kJ/mol

I-I bond: 151 kJ/mol

H-I bond: 297 kJ/mol

A. + 7 kJ/mol

B. + 297 kJ/mol

C. - 290 kJ/mol

D. - 7 kJ/mol

Give "Drug X" 5.0 mg/kg per day in two divided doses. The patient weighs 53 lb. How many mg should be given per dose? How many mg should be given per day?

Compound made 3 + And 3-

One atomic mass unit has a mass of 1.6605 x 10-24 g. What is the mass of one molecule of H2O? a. 2.991 x 10-23 g b. 1.6605 x 10-24 g c. 6.022 x 1023 g d. 1.6605 x 10-24 u e. 18.016 g

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar) : ch3co2h an analytical chemist has determined by measurements that there are 1.204 moles of carbon in a sample of acetic acid.

Select the correct answer. A man pours some hot coffee into a small cup from a large jug that contains enough coffee for several cups. Which statement correctly compares the coffee in the cup and in the jug? A.

Is sponge cake a heterogeneous mixture

Describe three skills people use to conduct scientific investigations

The surface temperature on Venus may approach 739 K. What is this temperature in degrees Celsius?

Complete the acid-base reaction between butyric acid HC4H7O2 and potassium hydroxide KOH. Do not include phase designations for any of the reactants or products. Be sure to include the charge for any charged species.