Which choice best describes the degree of uncertainty in the measurement 4.0032 g?
The quantity is exact.
The measurement is between 3.99 and 4.01 g.
The measurement is between 4.0031 and 4.0033 g.
The measurement is between 4.002 and 4.004 g.
What temperature is -10°C on the Fahrenheit scale?
263°F
26°F
-18°F
14°F
How many calories are released when 500 g of water cools from 95.0°C to 25.0°C?
1.25 × 10^4 cal
70.0 cal
4.75 × 10^4 cal
3.50 × 10^4 cal
Another name for atomic mass unit (amu) is the _______
mendeleev.
avogadro.
kekule.
dalton.
The smallest amount of an element that retains that element's characteristics is the _____
electron.
molecule.
proton.
atom.
For the isotope 71Ga, Z = __ and A =__.
71; 31
31; 40
71; 40
31; 71
What is the formula of a compound formed by the ions M^2+ and X^3-?
M2X
MX3
M2X3
M3X2
An atom with 3 valence electrons will most likely ________
gain three electrons.
lose three electrons.
gain five electrons.
lost five electrons.
