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One of the biggest threats to the mental health of fire fighters is:

At the grocery store, a bag of chips contains 0.10 L of air at 1.0 atm and 20 °C. The unopened bag of chips is taken on a camping trip in the mountains where the pressure is 0.90 atm and the temperature is 25 °C. What is the volume of air in the bag in the mountains?

A hot dog contains 151 kcal. How many joules of energy is this?

What is the pH of a solution with a [OH–] of 4.1 × 10–3 mol/L?

An order is given to administer 100. mg of furosemide, a diuretic, over the course of four hours by IV. If a 500. mL bag contains 200. mg of furosemide, what flow rate, in mL/hour, should be administered to the patient?

Each of the following diagrams represents a reaction showing the activation energy. Which reaction has the fastest rate?

The temperature of a gas at 1.00 atm and 8.00 °C is increased to 20.0 °C, resulting in a change of pressure. What is the new pressure? Assume the volume is constant.

According the balanced equation for the combustion reaction of butane (C4H10) below, how many grams of water can be produced when 1.25 g of butane (C4H10) are burned in a butane lighter. Assume excess oxygen is present. Show the calculation.                              2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (l)                                                                                                                                         

Which of the following are conjugate acid-base pairs in the acid-base reaction between ethanamine (CH3CH2NH2) and water?           CH3CH2NH2 (aq) + H2O (l) ⇋ CH3CH2NH3+ (aq) + OH– (aq)    I. H2O and CH3CH2NH2 II.  H2O and OH– III. CH3CH2NH2 and CH3CH2NH3+ IV. CH3CH2NH3+ and OH–

When magnesium chloride dissolves in water, it forms _______ with water molecules.