Periodic Table
If a chemical equation starts with 6 atoms of Oxygen, how many atoms of oxygen should be in the products?
6!!!!!
LAW OF CONSERVATION OF MASS
Which of the following are renewable resources?
oil, coal, natural gas, nuclear, hydroelectric, biomass, geothermal, solar, wind
hydroelectric, biomass, geothermal, solar, wind
Which two are immediately affected by surface mining?
lithosphere
biosphere
atmosphere
hydrosphere
lithosphere and biosphere
What elements are in the formula NaHCO3
Na, H, C, O
What law does a balanced equation support?
law of conservation of mass
how is the periodic table of elements organized?
increasing atomic number from left to right
which fossil fuel is used to produce plastics?
petroleum (oil)
what causes acid rain pollution?
Coal fired power plants
oil is less dense than water. If your poured the two liquids together, where would the oil sit? (top or bottom)
on top because it is less dense
which is the balanced equation?
A). 2Fe+O2 --> Fe2O3
B). 2H2+O2--> 2H2O
2H2+O2--> 2H2O
H-4. H-4
O-2 O-2
potassium (K) has a density of .8 g/cm. Which element will have a similar density?
Sodium (Na)
iron (Fe)
SODIUM because its in the same group/family!!
How would the world be most affected by the depletion of trees?
global warming
burning fossil fuels puts what gas into the atmosphere?
carbon dioxide
which type of mixture will NOT separate when left undisturbed? (homogeneous or heterogeneous)
homogeneous
which is an example of a physical change?
burning paper
water turning to steam
baking a cake
water turning to steam
Noble Gasses (group 18) are all described as what elements? (reactive, nonreactive, metal, nonmetals)
nonreactive nonmetals (gasses)
what gas causes global warming?
Carbon Dioxide
if we continue to use fossil fuels, what will most likely happen.
increased carbon dioxide and global warming
H2O and H2O2 are both what?
COMPOUNDS
if you have paper with a mass of 2g and you burn it outside, what will happen to the mass?
it will decrease mass because some of the mass is lost as gas into the air
group 1 elements on the periodic table are all.... (metals, nonmetals, reactive, nonreactive?)
highly reactive metals
how would the depletion of mined resources affect the economy?
industries would not be able to make products and transport goods.
if a coal mining company digs into the ground and flattens a mountain while removing topsoil, what will most likely occur?
Erosion and water runoff because there is no vegetation.
If a beaker weighs 30.55 grams, and Oxygen + the beaker weigh 35.77 grams, how much does JUST the Oxygen weigh?
5.22 grams
Because 35.77 - 30.55= 5.22
What is the SOLID that forms in a chemical reaction called? (Hint- students always think its precipitation)
A Precipitate