Which of the following substances is heterogeneous?

A. 3% hydrogen peroxide

B. The lint from your clothes dryer

C. A copper wire

D. Iron

E. Baking soda

Given the reaction: C6H12O6 (s) + 6 O2 (g) 6 CO2 (g) + 6 H2O () How many moles of C6H12O6 (s) are needed to produce 24 moles of carbon dioxide? A) 1.0 moles B) 12 moles C) 24 moles D) 4.0 moles

A person tells you that two organisms belong to the same family but to different classes. Can that information be correct?

Which two elements most likely have the most similar properties? beryllium and boron scandium and silicon nitrogen and phosphorus hydrogen and helium

A measure of the kinetic energy of particle motion within a substance is temperature. True False

When 0.105 mol propane, c3h8 is burned in an excess of oxygen, how many moles of oxygen are consumed? the products are carbon dioxide and water. you have to properly balance the equation before you can answer this question?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves