Why is iron more reactive than copper

How do scientists design roller coasters without using an engine?

The first plant to grow in new environments are usually a. ferns and horsetails b. grasses c. liverworts d. mosses and ferns

What is the ph of the benzoic acid solution prior to adding sodium benzoate?

Cholesterol, which is composed primarily of carbon and hydrogen atoms, is therefore 1. an acid. 2. a base. 3. insoluble in water. 4. a buffer. 5. a polar molecule.

Which of the four containers represents a compound? A) Cl B) H2O C) N2 D) Na

How is the Bohr atomic model different from the plum-pudding model? A. In Bohr's model, the atom's mass is found at its center instead of distributed throughout. B. In Bohr's model, the atom's mass is mostly made up of electrons instead of protons.

What does the cell theory state? A. that cells come from other cells B. that cells come only from animals C. that cells cannot be created or destroyed

For which one of the following molecules is the indicated type of hybridization not appropriate for M the central atom? a. BeCl2 sp2 b. SiH4 sp3 c. BF3 sp2 d. C2H2 sp e. H2O sp3

P4O10 (s) = - 3110 kJ/mol H2O (l) = - 286 kJ/mol H3PO4 (s) = - 1279 kJ/mol Calculate the change in enthalpy for the following process: P4O10 (s) + 6H2O (l) → 4H3PO4 (s)

Aluminum bromide reacts with chlorine gas to produce aluminum chloride and liquid bromide, according to the chemical equation below: 2A1Br3 + 3Cl2 + 2AlCl3 + 3Br2 How many moles of Aluminum chloride are made if 779 g of chlorine gas are consumed?