Which of the following describes a liquid? A. Does not have a fixed volume or a fixed shape B. Has a fixed volume and a fixed shape C. Has a fixed shape but not a fixed volume D. Has a fixed volume but not a fixed shape

How many mg in each ml of a \( 10 \% \) solution of NaCl ?

Consider the same reaction as in question 6 above: \[ 4 \mathrm{Al}(s)+3 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{Al}_{2} \mathrm{O}_{3}(s) \] How many grams of aluminum oxide will be produced from the complete reaction of 1.27 L of oxygen gas at 783.0 mmHg and \( 30.0^{\circ} \mathrm{C} \) ?

5) \( \mathrm{Ag}_{2} \mathrm{O} \rightarrow \)

14 Nitrogen has atomic number 7 and oxygen has atomic number 8 What is total number of electrons in \( \left(\mathrm{NO}_{3}\right)^{-} \)ion ? \( \begin{array}{ll}\text { (a) } 15 \mathrm{e}^{-} & \text {(b) } 31 \mathrm{e}^{-} \\ \text {(c) } 32 \mathrm{e}^{-} & \text {(d) } 46 \mathrm{e}^{-}\end{array} \)

How many \( \mathrm{mg} / \mathrm{ml} \) does a \( 2.5 \% \) solution contain?