What is the density of a smaple if it weight 3.5 grams and has a volume of 2cm^3

It is common to mix polar solvents (e. g., methanol) with non-polar solvents (e. g., hexane) to obtain an eluting solvent of intermediate polarity. Would it be appropriate to use a water-hexane mixture?

Which of the following is an inference? A burning candle is extinguished when it is covered with a jar. The candle burns longer than expected in a jar that has a plant in it. A plant lives longer than expected in a jar that has a burning candle.

What mass of solid sodium formate (of MW 68.01) must be added to 150 mL of 0.42 mol/L formic acid (HCOOH) to make a buffer solu - tion having a pH of 3.74? Ka = 0.00018 for HCOOH. Answer in units of g.

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.

An airplane attempting to fly higher than 300,000 feet will

A. Write an equation for determining the number of moles of NaOH that are added to the flask based on [NaOH] and volume of NaOH titrant (mL NaOH): B.

Is romano cheese an element, compound, homogeneous mixture, or heterogeneous mixture?

Which of the following is an appropriate food storage method

Why should your disposal of excess magnesium take place in a fume hood? (choose all that apply) Group of answer choices The quench released hydrogen gas, which is flammable and explosive The quench is highly exothermic and might cause the solvent to

For the chemical equation SO2 (g) + NO2 (g) SO3 (g) + NO (g) SO2 (g) the equilibrium constant at a certain temperature is 3.00. At this temperature, calculate the number of moles of NO2 (g) that must be added to 2.30 mol SO2 (g) in order to form 1.