Tema
Q:
Which of the following is an ionic compound?
CO
HCl
Na 2 O
Q:
What are the proper units for molar mass in chemistry?
\( \mathrm{gmu} / \mathrm{mol} \)
\( \mathrm{g} / \mathrm{mmol} \)
Q:
In an ionic bond, the charge on the cation (i.e. the metal) is
always positive.
always negative.
either positive or negative.
Q:
Which one of these compounds is an ionic compound?
Na 2 O
CO 2
N 2
Q:
According to the octet rule, a bromine atom has a tendency to
lose one electron.
lose two electrons.
gain one electron.
Q:
A statement about mass always being conserved in a chemical reaction is an example
of a
hypothesis
theory
law
Q:
Which is of the following is an example of a chemical property?
water boils at \( 100^{\circ} \mathrm{C} \)
acids are sour and bases are bitter
an iron nail rusts
Q:
10. In chemistry, the pH of a substance is defined as \( p H=-\log \left[H^{+}\right] \),
where \( \boldsymbol{H}^{+} \)is the hydrogen ion concentration in moles per liter. Tomatoes have a
hydrogen ion concentration of \( 6.3\left(10^{-5}\right) \); what is the pH of tomatoes?
Q:
Question 10 of 10
What is the hybridization of the carbon in \( \mathrm{CO}_{2} \) and bond order of the \( \mathrm{CO}_{2} \)
molecule?
Q:
\( CH _ { 4 } + O _ { 2 } \rightarrow \)
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