Which of the following is required to change the state of matter?

When an electric circuit operates a buzzard makes a sound what happens to the electric charges in the circuit

When someone refers to the "periods" of the periodic table, what are they referring to? A. the metalloids B. the rows of the table C. the different historical models of the table D. the groups of elements with similar properties

Write and balance the combination reaction for the heating of solid magnesium in the presence of nitrogen gas. In a particular experiment, a 9.27-g sample of N2 completely reacts.

1. A 9.941 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 14.57 grams of CO2 and 5.966 grams of H2O are produced. In a separate experiment, the molar mass is found to be 60.05 g/mol.

All single-displacement reactions can be classified as another type of reaction as well. What type of reaction is that? A) combustion B) redox C) synthesis D) decomposition

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?

An object is dropped onto the moon (g m = 5 ft/s 2). how long does it take to fall from an elevation of 250 ft.?

Which type of luster gives the mineral the appearance of metal?

Anything that contains only one kind of material?

One mole of propane (c3h8) gas reacts with five moles of oxygen (o2) gas to produce three moles of carbon dioxide gas (co2) and four moles of water gas (h2o).