Where can krypton be found in its natural state

You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100 M benzoic acid (p K a = 4.20) and 0.220 M sodium benzoate. How many milliliters of each solution should be mixed to prepare this buffer?

What is the product of this chemical reaction? "Copper (II) Sulfate reacts with Potassium Iodide"

When a potassium atom forms an ion, it loses one electron. What is the electrical charge of the potassium ion? A. -2 B. -1 C. +2 D. +1

What is the second most abundant element in stars? A. helium B. iron C. hydrogen D. oxygen

During the electrolysis of brine where does the hydrogen in the hydrogen gas come from

Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydrogen and oxygen D) digesting a cheeseburger E) burning coal

Which substance is a combination of different atoms? homogeneous mixture heterogeneous mixture element compound

What is the mass of 3.75 moles of NaCI? (Na = 22.99g/mol, CI = 35.45 g/mol)

Convert to grams 0.100 moles of Co2

In order to use the value 22.4 L for molar volume in a mass-volume or volume-mass stoichiometry problem, the gas must be assumed to be at STP. A. True B. False