Chemistry, 13.08.2019 06:20 ashleydawn6430
6. alex wanted to find out what toothpaste made teeth the cleanest. everyday she brushed her
teeth with a different product and then took a plaque test to see how much plaque was left.
she used crest, colgate, close-up, and water.
a. independent variable (iv): tume of toothpaste
b. dependent variable (dv): how much piaque (as loft
c. control:
d. constants:
Answers: 3
Chemistry, 22.06.2019 18:30
The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif –1,036licl –853naf –923kf –821nacl –786which 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 20:40
What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.
Answers: 1
Chemistry, 22.06.2019 21:30
Describe at least two advantages and two disadvantages of using hydropower as a source of energy.
Answers: 2
6. alex wanted to find out what toothpaste made teeth the cleanest. everyday she brushed her
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