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When aqueous solutions of sodium hydroxide, NaOH, and magnesium bromide, MgBr2, are mixed, a white precipitate is formed. If the precipitate is removed by filtration and the resulting clear solution is evaporated, white crystals are formed. What is the formula of this crystalline product?
How many grams of methane must be combusted to heat 1.15 of water from 26.0 to 87.0, assuming as a product and 100% efficiency in heat transfer?
A calcium carbonate tablet dissolves with stomach acid which contains hydrochloric acid. CaCO3 (s) + HCl (aq) CaCl2 (aq) + H2O (l) + CO2 (g)
each quarter produced by the u.s. mint is made up of copper and nickel alloy. in each coin there is 0.00740 moles of ni
ideal gas in 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K.
Consider this reaction involving an unknown element X. When 1.800 g of XBr reacts, 0.6758 g of Br2 is produced.
Gold (Au) crystallizes in a cubic close-packed structure (the face-centered cubic unit cell) and has a density of 19.3 g/cm3. Calculate the atomic radius of gold in picometers.
How many moles of CO(NH2)2 are present in 105 g of water, if the freezing point of the solution is -4.02C? kf(water) = 1.86 K · kg/mol.
When 0.89 g ZnCl2 is dissolved in 280. mL of 0.150 M NaCN, what are [Zn2+], [Zn(CN)42- ], and [CN- ] [Kf of Zn(CN)42- = 4.2 multiplied by 1019]
A protein contain the following amino acids 61 LYS 75 GLU 26 TYR 22 HIS 45 PRO 47 PHE 29 ARG 67 GLY 77 ASP 65 ALA 24 THR 25 MET 71 VAL 56 ILE 12 SER 83 LEU A) What is its net charge at pH 13
write a balanced chemical equation for the reaction of 4-nitrobenzaldehyde and sodium borohydride nabh4. if 0.21 g of
waters heat of fusion is 80. and its specific heat is 1.0 . some velomobile seats have been designed to hold ice packs
How would you calculate the quantitative solubility of calcium nitrate (Ca(NO3)2 after saturating the solution, heating, and drying and the precipitate formed weighs 1.3 g
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