Oxygen and copper are examples of what?

Two substances with identical atoms.

Two different molecules.

Two different elements.

Atoms that can't combine to form compounds.

A 0.271 g sample of an unknown vapor occupies 294 ml at 140.°c and 847 mmhg. the empirical formula of the compound is ch2. what is the molecular formula of the compound?

How many moles of CaCl2 will it take to neutralize 4 Moles of NaOH?

How many atoms are present in 0.0350 mol of barium phosphate

What is the mass of 3.50 moles of silicon dioxide

What are shorter Alkane chain compounds used for?

When the system is at equilibrium, it contains NO 2 at a pressure of 0.817 atm, and N 2 O 4 at a pressure of 0.0667 atm. The volume of the container is then reduced to half its original volume.

Which statement best describes the role of the sun in creating wind? Question 2 options: The rays of the sun push the air in all directions, creating wind The radiation of the sun reacts with water over the ocean The energy of the sun heats the land

Write the formula for a complex formed between zn2 and nh3, with a coordination number of 3.

Gloria is writing the chemical formula for a compound using its chemical name. She has just identified the names of the elements in the compound. What tool will she use next?

Warm-Up A 206-gram bar of iron has sunlight shining on it. Initially, its temperature is 24.7°C. As it gains 1,070.79 joules of energy, its temperature rises to 36.2°C. Calculate the specific heat capacity of the iron bar using the formula Q = mCAT.