How many aluminum atoms are in 3.78 g of aluminum?

Introductory Chemistry 5
Calculate the mass percent composition of nitrogen in each compound. (a) \(\mathrm{N}_{2} \mathrm{O}\) (b) NO (c) \(\mathrm{NO}_{2}\) (d) \(\mathrm{~N}_{2} \mathrm{O}_{5}\) Equation Transcription: Text Tra

Physics: Principles with Applications 6
A heavy rainstorm dumps 1.0 cm of rain on a city 5 km wide and 8 km long in a 2-h period. How many metric tons (1 metric ton = 103 kg) of water fell on the city? [\(1\ \text{cm}^3\) of water has a mass of \(1\ \text{gram}=10^{-3}\ \text{kg}\).] How many gallons of water was this?

Organic Chemistry 11
Write structural formulas for all of the alkenes with (a) the formula C2H2Br2 and (b) the formula C2Br2Cl2. In each instance designate compounds that are cistrans isomers of each other. Predict the dipole moment of each one.

Campbell Biology 10
How is photosynthesis similar in C4 plants and CAM plants? a. In both cases, only photosystem I is used. b. Both types of plants make sugar without the Calvin cycle. c. In both cases, rubisco is not used to fix carbon initially. d. Both types of plants make most of their sugar in the dark.

Krugman's Economics for AP® (High School) 2
The horizontal intercept of the long-run aggregate supply curve is a. at the origin. b. negative. c. at potential output. d. equal to the vertical intercept. e. always the same as the horizontal intercept of the short-run aggregate supply curve.

The Economics of Money, Banking and Financial Markets 12th
What is the yield to maturity on a $10,000-face-value discount bond, maturing in one year, which sells for $9,523.81?

Biology for AP Courses
Which of the following are two examples of vestigial structures? a. gills in fish and parts of the throat in humans b. butterfly wings and dragonfly wings c. hind leg bones in whales and leaves on some cacti d. shark fins and dolphin fins

Biology: The Dynamic Science 5
Is learning always superior to instinctive behavior? If you think so, why do so many animals react instinctively to certain stimuli? Are there some environmental circumstances in which being able to respond correctly the first time would have a big payoff?