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#1) How many atoms are in 1.07 g of Na?
#2) The element X occurs naturally to the extent of 70.23% 30X and the rest 32X. What is the atomic mass of X? (Use 4 sig. fig.)
A 1.28 g sample of calcium metal reacts with oxygen gas to form 1.79 g of solid calcium oxide as its only product. Using the law of conservation of mass, calculate the mass of oxygen gas which reacted
If the colder block orginially weighed 200g and the warmer one 100g. calculate the final temperature and the entropy change of the universe for this process
Whereas B has been determined to be the kinetic product, C has been determined to be the thermodynamic product. Complete potential energy diagrams for the formation of B and C by sketching the energy curve for each product.
What is the mass percent of MgO in the mixture? Assume that only the MgO reacts with CO2.
A compound has an empirical formula of CH2Br and vapor density of 6.00 g/L at 375K and .983 atm. Determine molar mass of compound
Problem- Why would it be important to place the same amount of a solution in the polarimeter tube when measuring optical rotation as the amount of solvent when measuring the blank
what is the average power (energy per unit time) in units of watts (1W = 1J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
a 5.00 g sample of aluminum pellets specific heat capacity 0.89 jc g and a 10.00 g sample of iron pellets specific
Draw CI by placing atoms on the grid and connecting them with bonds. Do not identify the charge on each of these species. Include all lone pairs of electron.
Question- Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0400 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate
Find the volume (mL) and pH of 0.0588 M KOH needed to reach the equivalence point(s) in titrations of the following.
What can be said about the stoichiometric coefficients of a balanced chemical reaction AND the powers to which the concentrations are raised in the rate-law expression
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