Stuck on how to solve this: Convert the following and units and express the mass in grams: (1.8x10^8 km^2)x(10^6 m^2/1 km^2)x(3.9x10^3 m)x(1.00x10^3 kg/1 m^3)

A chemist must dilute 25.6mL of aqueous barium acetate (ba(C2H3O2)2) solution until the concentration falls to 1.0 M. She'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Be sure your answer has the correct number of significant digits.         ( Please type answer note write by hend )

part a) A student measured the mass of an empty micropicnometer to be 2.000g. A student places 0.500mL of citric acid solution into a micropicnometer. The student reweighed the micropicnometer and found the mass of the citric acid solution and micropicnometer to be 2.525g.  Calculate the density of the citric acid solution in g/ml. part b) A student measured the mass of an empty micropicnometer to be 2.000g. A student places 0.500mL of citric acid solution into a micropicnometer. The student reweighed the micropicnometer and found the mass of the citric acid solution and micropicnometer to be 2.525g.    A student titrates 0.101mL of citric acid solution using the standardized 0.1M solution (use the exact concentration calculated from the previous titration problem). The sample required 0.819mL of NaOH solution to reach the end point.   Given the following chemical equation.   NaOH   +  H3C6H5O7 →  Na+ +   H2O  +   C6H5O73-   Given the above information. Calculate the mass of citric…

How many picograms are in 4.28 x 10^-11g?

6

A chemist prepares a solution of iron(II) bromide (FeBr₂) by measuring out 63. g of iron(II) bromide into a 100. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's iron (II) bromide solution. Round your answer to 2 significant digits. mol/L x10 x

In a similar experiment, a pair of students was asked to measure out 10.00 mL of water using a 25-mL buret. The data they collected is shown in the table below: Trial Student 1 Student 2 1 9.98 mL 9.97 mL 2 10.00 mL 9.99 mL 3 9.99 mL 10.01 mL Which of the following statements best describes the set of data collected by each student? Student 1 both accurate and precise Student 2 only accurate [ Choose] only accurate both accurate and precise only precise

Use the algebraic equation to determine the mass if the volume was 622 mL.  mass (g) = (3.60 g/mL)(volume (mL)) + 11.4 g y= mass (g) m = 3.60 g/mLx= 622 mL b = 11.4 g

Solve the following, round to the correct number of the significant figures and chose the correct answer: Density = mass/volume if mass of substance X was found to be 2.3467 g and volume was 18.90 ml, what is the density of substance X? Remember to apply the correct significant figure rule to your final answer. O 8.05 ml/g O 0.1242 g/m! O 0.1241 g/ml O 8.054 ml/g O 0.12 g/ml

Please set up the answer the correct way. I am having a hard time with putting the units in the correct spots.