What kind of science is most used to build or design useful technology?

What is the total energy change for the following reaction: H2 + I2 - > 2HI? Given: H-H bond: 436 kJ/mol I-I bond: 151 kJ/mol H-I bond: 297 kJ/mol A. + 7 kJ/mol B. + 297 kJ/mol C. - 290 kJ/mol D. - 7 kJ/mol

A 950 kg car has a velocity of 13 m/s. What is the kinetic energy of the car?

What is the name of this covalent compound? CF4

How many grams of Cl are in 150g of CCl4 if CCl4 has 92.2% of Cl?

A flexible container has a volume of 22.5 liters when there is 1.00 moles of gas in it at STP. Determine the number of miles of gas that must be contained if the volume is increased to 30.0 liters.

For each solute, identify the better solvent: water or carbon tetrachloride

If an element has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass?

What did the Cherokee do to assimilate? Check all that apply They invented a writing system. They resisted white settlement. They wrote a constitution. They planted cotton and farmed.

Which of the following correctly compares the radii of Cl and Cl-? Cl has a larger radius than Cl - because Cl has an additional energy shell. Cl has a smaller radius than Cl - because Cl has an expanded electron cloud.

When a stretched string is vibrated up and down with a particular frequency, it causes a standing wave to be produced.