States of Matter
Which state of matter has a set volume and shape?
Soliddddd
Is flammability a chemical or physical property?
Chemical.
How is mass/matter affected during a chemical reaction?
It can neither be created nor destroyed so it is conserved.
Which of the following are classified as elements? Pick all that apply.
Rubidium (Rb)
Baking soda
Nitrogen (N)
Brass
Ammonia (Nh3)
1 and 3
Can you see the different ingredients that are in a homogenoues mixture?
N...O... NO
Which state of matter has a fixed volume but does not have a fixed shape so it takes the shape of whatever container it is in?
LIQUIDDDDD
Chemical
A 19.0 g sample of oxygen gas combines completely with 2.0 g of hydrogen gas to form water. What is the mass of water formed?
21g
Which of the following are classified as compounds? Pick all that apply.
Ammonia (NH3)
Gold (Au)
Sodium Chloride (NaCl)
Lithium (Li)
1,3,5
Which of the following are heterogeneous mixtures? (Pick all that apply)
☐ Salad
☐ Ocean water
☐ Concrete
☐ Saltwater
☐ Pizza
☐ Smoothie with fruit chunks
☐ Air
☐ Sand and iron filings
☐ Coffee (no sugar or milk)
☐ Soil
Salad – clearly see the different ingredients
Concrete – cement, gravel, and sand not evenly mixed at the particle level
Pizza – toppings and crust are distinct
Smoothie with fruit chunks – uneven texture, visible bits
Sand and iron filings – two distinct substances that can be separated physically
Soil – made of organic matter, minerals, rocks, etc., not uniform
Which state of matter doesn't have a fixed volume and shape so it takes the volume and shape of its container?
GASSSSS
Cars rust/oxidize when exposed to moisture and oxygen, is this a chemical or physical change?
Chemical
From a laboratory process designed to separate sodium chloride into sodium and chlorine, a student collected 43.2 g of sodium and 24.7 g of chlorine. How much sodium chloride was originally involved in the process?
67.9g
Which of the following are mixtures? (Pick all that apply)
☐Dirt
☐ Water (H₂O)
☐ Air
☐Ammonia (NH3)
☐ Sodium chloride (NaCl)
☐ Concrete
☐Gold (Au)
☐ Milk
dirt, air, concrete, milk
Which of the following are homogeneous mixtures? (Pick all that apply)
☐ Sweet tea
☐ Spaghetti with meatballs
☐ Vinegar
☐ Orange juice (no pulp)
☐ Chocolate milk
☐ Vegetable soup
☐ Brass
☐ Ice cream sundae
☐ Rubbing alcohol
☐ Trail mix
Sweet tea – sugar fully dissolved in water, uniform throughout
Vinegar – acetic acid dissolved in water, uniform
Orange juice (no pulp) – uniform liquid
Chocolate milk – uniform if well mixed
Brass – solid solution of copper and zinc
Rubbing alcohol – uniform solution of isopropyl alcohol and water
What is a phase change? Give an EXAMPLE!!!!
List 4 indicators of a chemical reaction.
Change in temp, odor, color, and production of somethin new
A 8.6 g sample of rubidium reacts with oxygen to form 24.7 g of rubidium oxide. How many grams of oxygen reacted?
16.1 grams
What is the key difference between a mixture and a compound?
Mixture=retain individual identity, do not bond
Compound= bond, do not retain individual identity, form something new.
Is a solution classified as a homogenous or heterogenous mixture?
Homogenous.
Is a phase change chemical or physical, why?
Physical for many reasons, reversible, no new substance is formed.
In the chemical reaction shown below, how do you classify sodium (Na) and Chlorine (Cl), are they products or reactants?
Na + Cl→ NACl
Reactants!!!!
50.0 grams of ammonia was formed using 35.5 grams of nitrogen and an unknown amount of hydrogen. How much hydrogen was used to form the 50.0 grams of ammonia?
14.5 grams
What is the differeence between an element and a compound?
Element is made of just one thing whereas compound is made of multiple.
Compare homogenous and heterogenous mixtures.
Homogenoues=uniform, hetero=different visible parts