Liquid - rain
Solid - snow
Gas - water vapour (when it evapourates from the lithosphere)
Answer:
Which one goes in the absolute dating column, relative column, and both.
Lesson 4.07: Relative and Absolute Dating DIRECTIONS: Use the facts below to complete the chart for Relative and Absolute Dating.
1. The Law of Superposition – the age of an object may be determined by the depth at which it is found, the deeper the object is in the Earth, the older it is.
2. Gives scientist an exact age of a rock fossil.
3. Scientist use their knowledge of the half-life of carbon and uranium isotopes to measure the age of the rock or fossil .
4. Used to determine the age of an object, when there is no record of a living thing.
5. Gives the approximate age of a fossil or artifact.
6. Used by scientist to determine the age of a fossil or artifact.
7. Estimates the order of geological or prehistoric events, but cannot be used to determine when these events have occurred.
8. Measures the decay of a rock or fossil to measure the age.
Answer:
See explanation
Explanation:
a) The equation of the reaction is;
2Na + Cl2 ------>2NaCl
Number of moles of sodium = 10g/23 g/mol = 0.43 moles
If 2 moles of sodium reacts with 1 mole of Cl2
0.43 moles reacts with 0.43 * 1/2 = 0.215 moles of Cl2
Mass = 0.215 moles of Cl2 *71 g/mol = 15.265 g
b) Equation of the reaction;
HgO -> Hg + O2
1.252 moles of HgO 1.252/32 gmol = 0.039 moles
1 mole of HgO yields 1 mole of oxygen hence
0.039 moles of HgO yields 0.039 moles of oxygen
Mass of oxygen = 0.039 moles * 32 g/mol = 1.248 g
c) Equation of the reaction;
2NaNO3 -----> 2NaNO2 + O2
Number of moles of 128 g of oxygen = 128g/32 g/mol = 4 moles
2 moles of NaNO3 yields 1 mole of oxygen
x moles of NaNO3 yields 4 moles of oxygen
x = 8 moles of NaNo3
Mass of NaNO3 = 8 * 85 g/mol = 680 g of NaNo3
The average Kenectic energy
The grams that would be produced from 7.70 g of butanoic acid and excess ethanol is 7.923grams
calculation
Step 1: write the chemical equation for the reaction
CH3CH2CH2COOH + CH3CH2OH → CH3CH2CH2COOCH2CH3 +H2O
step 2: find the moles of butanoic acid
moles= mass/ molar mass
= 7.70 g/ 88 g/mol=0.0875 moles
Step 3: use the mole ratio to determine the moles of ethyl butyrate
moles ratio of CH3CH2CH2COOH :CH3CH2CH2COOCH2CH3 is 1:1 therefore the moles of CH3CH2CH2COOCH2CH3 = 0.0875 x78/100=0.0683moles
step 4: find mass = moles x molar mass
= 0.0683 moles x116 g/mol=7.923grams
