hoose the best word or phrase to complete each sentence. 1. is a financial service that offers a kind of in the event of unforeseen damage, injury, or cost. 2. A is the cost of a type of insurance that is paid at regular intervals.

Which of the following is a synthesis reaction? A.) AgNO3 + NaCl → AgCl + NaNO3 B.) BaO + H2O → Ba (OH) 2 C.) SO3 + H2O → H2SO4 D.) Cu + AgNO3 → Ag + CuNO3

Which subatomic particle is the lightest? (a) neutron (b) proton (c) electron (d) all of the above (obviously not the last one, I guess)

The student measures the actual pressure of the CO2 (g) in the container at 425 K and observes that it is less than the pressure predicted by the ideal gas law. Explain this observation.

Which pair of ions can form an ionic bond with each other and why? A) Cu + and Ag+; They are both metal ions. B) S2 - and O2-; They have like charges. C) Br - and At-; They are both halogen ions. D) Li + and Br-; They have unlike charges.

Which of the following is a characteristic of nonmetals? Nonmetals do not conduct electricity. Nonmetals are often shiny and hard. Nonmetals are often malleable. Nonmetals are often ductile.

1. A food sample is burned in a calorimeter that contains 2000. g of water. The temperature increases from 22.0°C to 44.3 °C. How many Calories does the food sample contain, assuming all of the energy from the food was transferred into the water?

Why doesn't water light on fire? It has all the ingredients except heat! Hydrogen for the flammability factor, oxygen so it can keep burning, and all you need to do is add heat and BOOM you have a flame! 15 pts

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding

As the speed of a particle increases, does its associated wavelenght increase or decrease