What is the net charge on an ion that has 9 protons, 11 neutrons, and 10 electrons?

(1) 1 + (3) 1-

(2) 2 + (4) 2-

What Is a high-temperature physical state of matter in which atoms lose their electrons?

A student measures the mass of a sample as 9.67g. Calculate the percentage error, given that the correct mass is 9.82

156 g C12H22O11 (sucrose) is dissolved into 4.0 L of solution. What is the molar concentration of the solution? Report your answer with the correct number of significant figures.

Classify the following as an endothermic or exothermic reaction: a. making popcorn in a microwave oven. b. a burning match. c. boiling water. d. burning rocket fuel. e. the reaction inside a heat pack

The compound FeCI3 is made of

2. An object experiences an acceleration, g, when it is on the surface of a planet of radius R. What will be the acceleration on the object after it has been moved to a distance of 4R from the center of the planet? A) 168 B) 48 C) 1/4 g D) 1/16 g

For a successful TLC experiment, you need to pay attention to the details. From the list of instructions and tips below, select the detail that is NOT important to a TLC experiment. O O Do not disturb the developing chamber.

The word atom means invisible?

A pycnometer weighs 25.60 g empty and 35.55 g when filled with water at 20°C. The density of water at 20°C is 0.9982 g/ml. When 10.20 g lead is placed in the pycnometer and the pycnometer is again filled with water at 20°C, the total mass is 44.83 g.

How does weathering affect the surface area of a rock? Explain your answer.