There are 365 days per year, 24 hours per day, 12 months per year, and 60 minutes per hour. Use these data to determine how many minutes are in a month.

You go to a convenience store to buy candy and find the owner to be rather odd. He allows you to buy pieces only in multiples of four, and to buy four, you need $\$0.23$. He allows you only to use $3$ pennies and $2$ dimes. You have a bunch of pennies and dimes, and instead of counting them, you decide to weigh them. You have $636.3~\mathrm{g}$ of pennies, and each penny weighs an average of $3.03~\mathrm{g}$. Each dime weighs an average of $2.29~\mathrm{g}$. Each piece of candy weighs an average of $10.23~\mathrm{ g.}$

How much would all of your dimes weigh?

You may have noticed that when water boils, you can see bubbles that rise to the surface of the water .What is inside these bubbles? Explain. a. air b. hydrogen and oxygen gas c. oxygen gas d. water vapor e. carbon dioxide gas

You go to a convenience store to buy candy and find the owner to be rather odd. He allows you to buy pieces only in multiples of four, and to buy four, you need $\$0.23$. He allows you only to use $3$ pennies and $2$ dimes. You have a bunch of pennies and dimes, and instead of counting them, you decide to weigh them. You have $636.3~\mathrm{g}$ of pennies, and each penny weighs an average of $3.03~\mathrm{g}$. Each dime weighs an average of $2.29~\mathrm{g}$. Each piece of candy weighs an average of $10.23~\mathrm{ g.}$

How many pennies do you have?

The days of the year are often numbered from 1 through 365 (or 366). This number can be computed in three steps using int arithmetic: (a) dayNum = 31(month - 1) + day (b) if the month is after February subtract (4month + 23)/10 (c) if it's a leap year and after February 29, add 1 Write a program that accepts a date as month/day/year, verifies that it is a valid date, and then calculates the corresponding day number.

When a marble is dropped into a beaker of water, it sinks to the bottom. Which of the following is the best explanation? The force from dropping the marble breaks the surface tension of the water.

There are $~\mathrm{24 hours/day}, 60 ~\mathrm{minutes/hour, 7 days/week}$, and $~\mathrm{4 weeks/month}$. How many minutes are there in one month?

You go to a convenience store to buy candy and find the owner to be rather odd. He allows you to buy pieces in multiples of four, and to buy four, you need $0.23. He only allows you to do this by using 3 pennies and 2 dimes. You have a bunch of pennies and dimes, and instead of counting them, you decide to weigh them. You have 636.3 g of pennies, and each penny weighs 3.03 g. Each dime weighs 2.29 g. Each piece of candy weighs 10.23 g. How much would this candy weigh?

You go to a convenience store to buy candy and find the owner to be rather odd. He allows you to buy pieces only in multiples of four, and to buy four, you need $\$0.23$. He allows you only to use $3$ pennies and $2$ dimes. You have a bunch of pennies and dimes, and instead of counting them, you decide to weigh them. You have $636.3~\mathrm{g}$ of pennies, and each penny weighs an average of $3.03~\mathrm{g}$. Each dime weighs an average of $2.29~\mathrm{g}$. Each piece of candy weighs an average of $10.23~\mathrm{ g.}$

How many pieces of candy could you buy (based on the number of dimes from part b)?

The following ratios of masses were obtained with a mass spectrometer: ${ }_9^{19} \mathrm{~F} /{ }_6^{12} \mathrm{C}=1.5832 ;{ }_{17}^{35} \mathrm{Cl} /{ }_9^{19} \mathrm{~F}=$ $1.8406 ;{ }_{35}^{81} \mathrm{Br} /{ }_{17}^{35} \mathrm{Cl}=2.3140$. Determine the mass of a ${ }_{35}^{81} \mathrm{Br}$ atom in amu.

A student performed an analysis of a sample for its calcium content and got the following results:

$$14.92 \% \quad 14.91 \% \quad 14.88 \% \quad 14.91 \%$$

The actual amount of calcium in the sample is 15.70. What conclusion can you draw about the accuracy and precision of these results?

Draw a structural formula for each of the following compounds. 2,3-dimethylheptane

Describe two ways in which radiation from the Sun supports life on Earth and two ways in which the Sun causes harm to people and technologies on Earth.

Plot each real number as a point on the real number line and place the correct inequality symbol (< or >) between the real numbers.

$$5 \ \square \ \frac{7}{2}$$