Identify each solid as molecular, ionic, or atomic. a. $Ar(s)$, b. $H_2O(s)$, c. $K_2O(s)$, d. $Fe(s)$

An ibuprofen suspension for infants contains 100 mg/5.0 mL suspension . The recommended dose is 10 mg/ kg body weight. How many mL of this suspension should be given to an in fant weighing 18 lb? (Assume two significant figures.)

Why does the melting point of hydrocarbons get higher as the number of carbon atoms per molecule increases? (a) An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon. (b) The induced dipole-induced dipole molecular attractions become stronger. (c) Larger hydrocarbon chains tend to be branched. (d) The molecular mass also increases.

Cross out given inappropriate pronoun and write the correct word above it.
Jose’s dad doesn’t have to work this weekend, so they might be able to drive us to the game.

Which of the following fundamental forces are not apparent to us in our everyday lives? a) gravitational force, b) electromagnetic force, c) strong nuclear force, d) weak nuclear force.

Silicone polymers may be prepared to exist as liquids at room temperature. Cite differences in molecular structure between them and the silicone elastomers.

Estimate the rms speed of an amino acid, whose molecular mass is $89 \mathrm{u}$, in a living cell at $37^{\circ} \mathrm{C}$.

A potential difference of 2.0 V is impressed across a pair of inert electrodes (e.g., platinum) that are immersed in a 0.050 M aqueo us KBr solution. What are the products that form at the anode and the cathode?

Use analytical methods to evaluate the following limits. $\lim _{x \rightarrow 1^{+}}\left(\frac{1}{x-1}-\frac{1}{\ln x}\right)$

Name the following binary molecular compounds:

a. $\mathrm{SO}_3 \cdots$

b. $\mathrm{ICl}_3$

c. $\mathrm{PBr}_5$

Explain the difference between the terms molecular mass and formula mass. To what type of compound does each term refer?

Write a molecular formula for each compound, and indicate the oxidation state of the group SA element in each formula: diphosphorus pentoxide.

Identify each as an ionic or molecular compound and convert the given mass to moles. Express your answers in scientific notation. 2.50 kg $Fe_2O_3$

A classmate tells you that experimental data shows a compound’s molecular formula to be 2.5 times its empirical formula. Is he correct? Explain.