Lab: Rate of Chemical Reactions — Unit test

Question 1

Fluorine has an atomic number 9. It is in period 2 of the periodic table. The diagram shows the electron dot diagram of a fluorine atom.

Revolt · Accepted Answer

seven

Question 2

Which element has fewer than four dots in its electron dot diagrams?

Revolt · Accepted Answer

gallium (Ga)

Question 3

Which is the only element in group 1 on the periodic table that forms covalent bonds?

Revolt · Accepted Answer

hydrogen

Question 4

Formaldehyde is an organic compound. Each molecule includes two hydrogen (H) atoms, one oxygen (O) atom, and one carbon (C) atom. Below are the dot structures for each of these elements.Which diagram shows how the covalent bonds most likely form in a formaldehyde molecule?

Question 5

Which statement best describes balancing equations and the law of conservation of mass?

Revolt · Accepted Answer

The number of atoms is the same in the reactants and in the products, and the total mass is the same in the reactants and in the products.

Question 6

The first chart shows the effect of the normal breakdown of material from reactants to products. The second chart shows the same reaction but with an added modification.

Revolt · Accepted Answer

Reaction B has an enzyme.

Question 7

What is produced during the replacement reaction of Cu(NO3)2 and Zn?

Revolt · Accepted Answer

Zn(NO3)2 + Cu

Question 8

Why do natural polymers not pose as much of an issue in landfills as synthetic polymers?

Revolt · Accepted Answer

Natural polymers are biodegradable, and synthetic polymers are not biodegradable.

Question 9

The element sulfur (S) is most likely to form covalent bonds with the element

Revolt · Accepted Answer

oxygen (O).

Question 10

How many atoms of each element are in the chemical formula NH4NO3?

Revolt · Accepted Answer

2 nitrogen, 4 hydrogen, and 3 oxygen

Lab: Rate of Chemical Reactions — Unit test Answers

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