How many ions are there in 0.042 mole of Ti(CO3)2 formula units?Place your answer in the box using scientific notation and using only a number or numbers to the proper number of significant figures.

What is the mass in grams of 7.73x10^24 molecules of CO2? Please express in decimal form How many moles are in 7.9x10^26 molecules of C6H12O6? Please express in decimal form

What is the mass of 3.5 x 10^-3 molecules of copper (II) carbonate? Use correct significant figures and units.

A student finds that they have 0.2545 g of NH4Cl, 1.1502 g of NaCl, and 1.0181 g of SiO2. Calculate the percent gained or lost during this experiment if the initial mass of the mixture was 2.5537 g.

1.) What is the molar mass for aluminum sulfate? Please use the atomic masses on the periodic table. Express your answer with the correct significant figures and units for molar mass. Mass Choices:  123.05 342.17 6.02 x 10^23 273.08 Unit Choices:  mol mol/g g g/mol 2.) How many grams are there in 5.699 moles of copper, Cu?  Express your answer with the appropriate significant figures and units.  0.08968 g/mol Cu 362.2 g/mol Cu 362.2 g Cu 0.08968 g Cu

Calculate the amount of anions (in moles) in 24.4 g of calcium iodate. Express your answer with three significant figures.

Crime scene investigators keep a wide variety of compounds on hand to help with identifying unknown substances they find in the course of their duties. One such investigator, while reorganizing their shelves, has mixed up several small vials and is unsure about the identity of a certain powder. Elemental analysis of the compound reveals that it is 67.31 % carbon, 6.978% hydrogen, 4.617% nitrogen, and 21.10% oxygen by mass.     Which of the compounds could the powder be? C17H19NO3C17H19NO3 = morphine, analgesic C17H21NO4C17H21NO4 = cocaine, illicit drug C7H5N3O6C7H5N3O6 = 2,4,6-trinitrotoluene (TNT), commonly used explosive C10H15NC10H15N = methamphetamine, stimulant C4H5N2OC4H5N2O = caffeine, stimulant C11H15NO2C11H15NO2 = 3,4-methylenedioxymethamphetamine (MDMA), illicit drug C21H23NO5C21H23NO5 = heroin, illicit drug C3H6NO3C3H6NO3 = hexamethylene triperoxide diamine (HMTD), commonly used explosive

You are given pure serine in powder form, and you are asked to make exactly 20 mL of a 20 μM solution. How much serine powder (in μg) would you need to make such a solution? For this problem, assume that carbon has molar mass of 12 amu, hydrogen 1 amu, nitrogen 14 amu, oxygen 16 amu, and sulfur 32 amu. You must compute the molecular weight of serine after drawing it; do not look up the molecular weight on google. Show your unit conversion fully step by step

Calculate the mass in grams of 3.00 x 1024 molecules of methanol. The chemical formula for methanol is CH,O. mass: + TOOLS X10

Be sure to answer all parts. Potassium is the second most abundant metal in the human body. Calculate the following: (a) The number of atoms in 7.11 moles of potassium. X 10 atoms Enter your answer in scientific notation. (b) The number of moles of potassium that contains 9.11 × 1025 atoms. x 10 mol Enter your answer in scientific notation.