Why do scientists use different types of models to represent compounds

Carbohydrates are nutrients that supply the main energy source for the body. True or False

A student needs 15.0 g of ethyl alcohol for an experiment. If the density of the alcohol is 0.789 g/mL, how many milliliters of alcohol are needed?

Base your answer to this question on the information below. During a bread-making process, glucose is converted to ethanol and carbon dioxide, causing the bread dough to rise.

Explain why very small cloud droplets of pure water evaporate even when the relative humidity is 100 percent.

What must happen for an ionic bond to be created between two elements?

A very simple assumption for the specific heat of a crystalline solid is that each vibrational mode of the solid acts independently and is fully excited and thus cv=3NAkB=24.9 kJ / (kmol⋅K). This is called the law of Dulong and Petit.

How many elements are found in the following chemical equation? K + Cl → KCl A. 1 B. 2 C. 3 D. 0

How many liters of 0.85 M HCl solution would react completely with 3.5 moles Ca (OH) 2?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.

Carbon dating advisable for measuring materials ages for a few years, thousands of years, millions of years