Which of these is probably a homogenous mixture? A. Soil B. Sand C. Tap Water D. Salad Dressing

For the reaction represented by the equation ch4 + 2o2 ® co2 + 2h2o, how many moles of carbon dioxide are produced from the combustion of 100. g of methane?

What does the number above the symbol represent? O A. The isotope number O B. The atomic mass O C. The atomic number O D. The ionic number

Which of these accurately describes a chemical reaction? A. Products and reactants combine to form new substances. B. Products combined to form reactants C. Reactants combine to form products D. Products and reactants combine to form new reactants.

What planet is farthest from earth

What are two scientific contribution made by Galileo gailei

How does the shape of a structure affect its overall strength

Kim is doing an experiment with sound waves. She tested to see how quickly a sound wave could travel through three different materials: a metal pole, a helium balloon and a glass of water. She recorded her results.

Which of the following is an example of an electric force that occurs in atoms

5. What is another name for Newton's first law in your own words.

The molar mass of magnesium (Mg) is 24.30 g/mol. There are 6.02 1023 atoms in 1 mol. How many atoms are present in 48.60 g of Mg? 3.32 10^-24 atoms 1.96 10^-21 atoms 1.20 10^24 atoms 7.11 10^26 atoms