Coulomb's Law is a mathematical representation of the electric force between two objects. When solving for electric force, a student gets a negative answer. What does this indicate about the two objects? O a O b Oc Od They are oppositely charged and attracted to one another They have like charges and attracted to one another They are oppositely charged and are repulsed by one another They have like charges and are repulsed by one another

Consider the reaction: 4 PH3 (g) →  P4 (g)  +  6 H2 (g) In the reaction above, 0.075 mole of H2 is produced in a 2.0-L container over some time period. What concentration of PH3 is consumed over the same time period?

An evil mastermind is attempting to take over the world, but he needs your patent for a new power source. He has trapped you in a room and a lethal nerve gas, sarin, is effusing into the room. You must figure out a way to escape in time. a)Air is mostly nitrogen, with a molecular mass of 28 g/mol. Sarin has molecular mass of 140.11 g/mol. Using Graham’s Law of effusion, determine the rate of nitrogen effusion into the room compared to the rate of sarin gas effusion. b) Nitrogen gas effuses at the rate of 79.0 mL/s. assuming the same temperature and pressure, at what rate will sarin effuse in mL/s? c)Assuming that nitrogen will behave as an idela gas, calculate the volume, in ml N2 that 1.00 mmol N2 will occupy at STP. d) At STP, how many minutes will it take for 1.00 mmol of N2 to effuse? e) Assuming that sarin will behave as an ideal gas at STP, how many minutes do you have to escape the room before 1..6 mmol of sarin has effused into the room?

A doctor has ordered for a week 0.35 grams of Carvedilol for a patient with high blood pressure. If your stock on hand consists of 25 mg tablets, how many tablets will you need for 1 day's treatment for the patient? QUESTION 13 O a. 2 O b. 14 O C. 7 O d. 20 O e. 1 QUESTION 14

Consider the following unbalanced chemical equation: CH4 (g) + O2 (g) → CO2 (g) + H2O (g) What state of matter is the water in at the completion of this reaction?  Group of answer choices   Gas Impossible to tell with the information given Solid Aqueous  Liquid