A Rock is determined to be 1.426 billion years old. How much uranium-235 remains in the rock?

What is the sum of all charges in the formula for an ionic compound? A +1 B 0 C -1

Which statement describes how the binary ionic compound KBr is named? a. The nonmetal is named first, and the name is unchanged. b. The metal is named first, and the name is unchanged. c. The nonmetal is named second, and the name is unchanged. d.

When using oven cleaner, one must be sure to wear chemical resistant gloves and work with adequate ventilation. Straight out of the can, the cleaner can have a hydrogen concentration of 3.98x10.

What is the atomic number f plus the atomic number of na equals the atomic number of this element?

A student places a 12-gram cube of ice inside a container. After six hours, the student returns to observe the contents of the container. Which mtence suggests that the container is an open system? O A.

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.

How would each of the following procedural errors affect the results to be expected in this experiment? Give your reasoning in each case. (A) Not all of the liquid was vaporized when the flask was removed from the water bath.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?