Which elements make up the f-block in the periodic table

A sample of a pure compound containing C, H, and N, weighing 1.00 g, yields 2.84 g of carbon dioxide and 0.677 g of water when it reacts with excess oxygen. What is the simplest formula of the compound?

Carbon dioxide is usually formed when gasoline is burned. If 3.00 L of CO2 is produced at a temperature of 100 °C, what is the temperature of the gas if the volume reduces to 1.00 L?

At room temperature, all samples of liquid water must have the same 1. mass 2. density 3. volume 4. weight

Gravity that exists between two objects exists as a small force unless: A) one object's mass is much larger than the other's B) one object's mass is much smaller than the other's C) the two objects are separated by a small distance D) the two

How many ml of 0.250 m h2so4 is required to completely react with 25.0 ml of 1.50 m naoh?

If an element has 1 valence electrons, how many dots will be in the elements dot diagram?

What is the temperature of a gas at STP?

What is the numerical meaning of centimeter

You run an experiment to test the effects of temperature on solubility. What would you heat? A.) solvent B.) solute C.) the room B.) the beaker

What happens when a firework is ignited?