Vocab
1. What is the smallest particle to make up any kind of substance
atom
30. name 2 elements that are similar to cobalt (Co)
Rhodium
Iridium
what is the formula for density
What are the units for mass?
What are the units for volume
D= Mass/ Volume
Mass= grams
volume=cm3, mL
What kind of change is it?
18. Kool aid goes from liquid to solid in the freezer
physical
soda has a pH of 5. What would it do in each indicator?
BTB
Phenolphthalein
Red litmus
Blue litmus
BTB- yellow
Phenolphthalein- colorless
Red litmus- stay red
Blue litmus- turn red
3. according to the Law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
they are equal
32. based on where it is on the periodic table, give 2 possible physical properties of selenium (34)
brittle
dull or not shiny
not a good conductor
not malleable
23. fill out the density chart
everyone gets points when their team is done
What kind of change is it?
19. you mix glue and a colorless liquid and it starts to get cold
chemical
blood has a pH of 7. What does it do in each indicator?
BTB
Phenolphthalein
Red litmus
Blue litmus
BTB- stays blue
Phenolphthalein colorless
Red litmus nothing
Blue litmus nothing
5. What kind of solution is one where you KNOW it has different particles in it but you can't SEE the difference?
Homogenous Mixture
31. is the element in period 5 family 3 likely to be: lustrous____
Malleable____
Brittle____
luster yes
malleable yes
brittle no
24. What is the volume of the smaller cube?
25. what is the mass of the smaller cube?
28. What is the substance the smaller cube is made of? Use the chart
27 cm3
306.18 g
What kind of change is it?
20. you color a white paper with a red crayon
physical
Egg whites have a pH of 9
what do the do in each indicator?
BTB
Phenolphthalein
Red litmus
Blue litmus
BTB stays blue
Phenolphthalein turns pink
Red litmus turns blue
Blue litmus stays blue
subscript
11. is it balanced?
H2 + O2 ----> H2O
no
Volume of water in the cylinder starts at 30 mL. I drop an object into the water and it rises to 35 mL.
The object has a mass of 30g.
What is the density of the object?
6 g/ml
What kind of change is it?
21. Yeast mixes with sugar producing gas bubbles to make dough rise
chemical
oven cleaner turns phenolphthelien pink. What is its pH?
higher than 7
15. A_________is the number that comes before a chemical formula and tells how many of the molecules are involved.
coefficient
12. Is it balanced?
NaOH + HCl ----> H2O + NaCl
yes
26. What is the density of the larger cube?
27. What is the mass of the larger cube?
29. What is the larger cube made of? Use the table
D= 2.7 g/cm3
M= 172.8 g
29. Aluminum
What kind of change is it?
22. You blow carbon dioxide into a solution of CaCO3 to make tiny white peices of chalk
chemical
tomatoes turn blue litmus paper red.
What is their pH? What would it do in phenolphtheilein
pH is less than 7
Colorless