Show:
Conservation of Mass
Counting Atoms
Physical/Chemical Changes
Metals, Nonmetals, Metalloids
Mixtures, Density, pH!
100

Mass cannot be -

Created nor destroyed

100

How many atoms of Hydrogen are in the following chemical compound? H4NO2

4 atoms of Hydrogen

100

What are the three S's?

Size, Shape, State of Matter

100

Where on the periodic table can nonmetals be found?

On the right

100

Is a salad a homogeneous mixture or a heterogeneous mixture?

Heterogeneous Mixture

200
In RAP, R stands for -

Reactants

200

How many elements are in the following compound?

Al3(PO2)2

3 elements

200

What are all the evidences for a chemical change?

Color, Gas, Light, Temperature, Bubbles/Fizzing, Odor, and Precipitate.

200

THIS is a type of element that can be easily made into a wire and conducts electricity.

Metal

200

Will something with more density float, or will it sink?

It will sink

300

If the products in a balanced chemical equation have a mass of 843 g, what is the mass of the reactants?

843 g

300

How many total atoms are in the following compound? 

3NO4H3

24 atoms

300

What is our class Mnemonic Device for chemical change evidence?

Cool Guys Like Their Big Orange Phones

300

An element that is malleable and lustrous is a -

Metal

300

What order will the following substances fall in a graduated cylinder, bottom to top?

Substance A - 1.2 g/mL

Substance B - 0.23 g/mL

Substance C - 0.832 g/mL

A, C, B

400
Does the following equation follow the Law of Conservation of Mass?


CH4 + NO2 --> CNO + 2H2O

No, it is unbalanced.

400

How many total atoms are in the following chemical compound?

2Fe(NO2)2

14 atoms

400
A plastic shoe melts in the sun. Is this a physical or chemical change, and WHY?

This is a physical change. The evidence is change in state of matter.

400

Which element would be best to make a frying pan? Titanium (Ti) or Carbon (C)?

Titanium (because it's a metal!)

400
The pH of a pool is 9. Is the pool

a. a strong acid

b. a weak acid

c. a weak base

d. a strong base

c. a weak base
500

What is the mass of the unknown?

2KClO3 --> 2KCl + 3O2

  103 g      62.7 g    ?

40.3 g

500

How many atoms of Carbon are in the following chemical compound?

3CaC2(CO2)2

12 atoms of Carbon

500

Two liquids were combined. The combination turned green and bubbles formed. Is this a physical or chemical change, and WHY?

This is a chemical change. The evidence is color, bubbles, and gas.

500

An unknown element sometimes conducts electricity and is brittle. Is it a metal, nonmetal, or metalloid?

Metalloid

500

Which substance is more acidic: battery acid (pH = 0.8) or stomach acid (pH = 1.5)?

Battery acid