Chemistry, 08.02.2021 05:00 sarbjit879
Circle the letter of the word or phrase that best completes the statement or answers the
question.
11. What is the electron configuration for the noble gases other than helium?
a. ns?np
b. ns2
c. ns?np
d. nsnp
12. How many outermost d electrons are there in an ion that has achieved a pseudo-noble gas
configuration?
a. none
b. five
c. eight
d. ten
13. The anion that has the formula C10 is called the
a. chloride ion.
b. chlorate ion.
c. hypochlorite ion. d. perchlorate ion.
14. Where does a subscript that indicates the number of atoms appear, relative to a chemical
symbol in a formula?
a. to the upper left b. to the lower left c. to the upper right d. to the lower right
15. What is the formula of calcium phosphate, which is made up of the ions Ca2+ and PO 3-?
a. Ca, PO4
b. Ca PO
c. Caz(PO2)2 d. Ca,(PO.)3
16. Which of the following is an example of an interstitial alloy?
a. brass
b. 14-carat gold c. carbon steel
d. sterling silver
Answers: 3
Chemistry, 22.06.2019 16:20
When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa
Answers: 1
Chemistry, 22.06.2019 18:30
The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif β1,036licl β853naf β923kf β821nacl β786which statement about crystal lattice energy is best supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.
Answers: 3
Chemistry, 22.06.2019 18:30
Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2β’2h2o sncl2β’4h2o sncl2β’6h2o
Answers: 2
Chemistry, 23.06.2019 01:00
Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose
Answers: 2
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