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Properties of subatomic particles.
1. Fill in the missing relative masses and relative charges for each of the subatomic particles.
Relative mass
Relative charge
a.Electron
1-
b.Proton
c.Neutron
1839
2. Balance the equations for the correct element next to its description at 25 degrees Celsius.
a.Ca→ _ +_
b. K→ _ +_
c. Sr→ _+_
d. Rb→ _+_
3.Balance the equation for the reactions of cautions with electrons.
a.Mg 2+ +_ →_
b. Li+ +_→_
c. 2H+ +_→_
d. Na+ +_→_
at 665 degc keq is 0.234 for the following reaction4as bg ?2cs dgif b gas at 0.221 bar is injected into a container
Ethanol has a molar mass of 46.08g/mol and a density of 0.789g/mL. It is a clear, colorless liquid that dissolves readily in water. How many milliliters of ethanol would be needed to make 1.20L of a 2.75M solution?
If a saturated solution of NH4NO3 at 70 °C is cooled to 10 °C, how many grams of solute will separate if the quantity of the solvent is 94.0 g?
(a) How many mL of KOH will it take to reach the equivalence point? (b) Calulate the pH at the equivalence point. The Ka of HClO is 3.8x10^-8
If the temperature of 150.0g of water increased from 23.3C to 44.8C, how much heat was absorbed.
10 ml of .1 M phosphoric acid is titrated with .1M NaOH. After 10 ml of NaOH has been added the pH is 4 What is the ratio of H3PO4/H2PO4 - at this point
How many neutrons and protons are contained in the nucleus of this isotope?
Using given data, calculate the change in Gibbs free energy for each of the following reactions. In each case indicate whether the reaction is spontaneous at 298 K
Predict whether a precipitation reaction will occur when aqueous solutions of ammonium sulfate and calcium acetate are mixed. Write the net ionic equation.
Using data from thermodynamic quantities at 298.15K, calculate deltaG^degree for the following reactions. Indicate if each reaction is spontaneous at 298K under standard conditions.
Explain for which of the following species resonance is an important property: HONO, HONO2, N3-, NO2-, NO2.
An emerald gemstone is an impure form of the mineral beryl, Be3Al2Si16O18. What is the percentage of silicon in the mineral
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