An atom is composed of protons, neutrons, and electrons. What is the electric

charge on an electron?

+2

0

-1

+1

You are given the percent by mass of the elements in a compound and wish to determine the empirical formula. Label each of the following statements as true or false and explain your answers. a. You must assume exactly 100.0 g of the compound. b.

A car driving east along the freeway at 60 m/s hits some traffic and after 7 seconds is now travelling at 45 m/s. What is the acceleration of the car?

Which of these characteristics best describes a basic solution? A:It tastes sour. B:It does not conduct electricity. C:It feels slippery. D:It turns litmus paper red.

An electron has an uncertainty in its position of 630 pm.

What is another word for chemical change

A compound that changes color when it comes into contact with an acid or base is an?

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