What is the wt/vol percent of acetic acid in your vinegar sample if there are 0.042 grams of acetic acid in your 2.00 mL sample of vinegar? Your answer should have 3 sig figs.

Ex. 110 - Calculating Mass of 3 attempts left Check my work What mass of oxygen is needed to react with 1.79 gal of methanol according to the balanced equation below? (1.00 gal = 3.79 L, and the density of methanol is 0.793 g/mL.) 2 CH3OH() + 3 02g) – 2 CO2g) + 4 H2O(g) If appropriate, express your answer in scientific notion. (Click on the answer box to show the pallet.) < Prev 3 of 5 ***** ****

A chemist adds 1.70 L of a 0.39 mol/L barium chloride (BaCl) solution to a reaction flask. Calculate the millimoles of barium chloride the chemist has added to the flask. Round your answer to 2 significant digits. manol O.P X

5. Sodium bicarbonate (NaHCO3) is used to neutralize acids to form sodium chloride, a salt, carbon dioxide gas, and water. Normally sodium bicarbonate is added until the fizzing ceases, at which point no more CO2 (g) is produced. NaHCO3 (s) + HCl (aq) NaCl (aq) + CO2 (g) + H2O (1) If 150. mL of 3.0 M HCl is spilled on a lab bench, what is the minimum mass of sodium bicarbonate that must be used to neutralize the acid?

In this experiment you will use a 3.0 x 10–5 M stock solution of red dye.  3.0 x 10–5 M means that the solution contains 3.0 x 10–5 moles of dye in one liter of solution.  How many moles of dye molecules are in 2.0 mL of the 3.0 x 10–5 M stock solution?Express your answer to 2 significant figures

Sample 1 Sample 2 Sample 3 Mass of Erlenmeyer Flask (g) 24.33 24.37 24.44 Mass of Erlenmeyer Flask + Calcium Hydroxide Solution (g)   (g)(lime water) 27.22 27.29 27.33 Mass of Calcium Hydroxide Solution (g) 2.89 2.92 2.89 Volume of Ca(OH)2 Density = 1.000 g/mL 2.89 2.92 2.89 Concentration of HCl (M) 0.1 0.1 0.1 Initial HCl Volume in Syringe (mL) 1.00+1.00 1.00+1.00 1.00+1.00 Final HCl Volume in Syringe (mL) .72 .66 .54 Volume of HCl Delivered (mL) 1.28 1.34 1.46 Moles of HCl Delivered       Moles of OH- in Sample       Moles of Ca2+ in Sample       Molar Solubility (M)       Calculated Ksp       Average Calculated Ksp       I am very confused how to solve the blank spots in the table. Everything including and after "Moles of HCl Delivered" confuses me. Please help me figure out how to solve the sections correctly. Also feel free to…

If the crucible originally weighs 3.715 g and 2.000 g of hydrate are added to it, what is the weight of the water that is lost if the final weight of the crucible and anhydrous salt is 5.072?  Do not include units and assume three decimal places for all numbers.  Remember to include the zero before the decimal if the number is less than one.