Answer: A monk called Dionysius Exiguous calculated his own present year to be A.D. 525. Counting from that year reaches the current year. A.D. is now used to label the number of years in the Gregorian calendar, the most widely used calendar in the world and the unofficial global standard. You add one year every January 1.
Explanation:
Answer:
The main physical factors that make agriculture possible or impossible are:
Climate. Some crops grow better in one climatic zone than in others. ...
Landscape. Relief (altitude and the gradient of terrain) influences agricultural activity. ...
Soil. Plants nedd soil with certain characvteristics.
Factors that influence the decisions farmers make about how to farm:
-relative cost of land
-labor
-capital
Farmers balance the use of these resources differently
-if the land is plentiful and costs little, they use it extensively
-if the land is scarce or expensive, they use it intensely.
Answer:
- 484 KJ/mol
Explanation:
The reaction equation is;
CH4(g) + F2 (g) ------> CH3F(g) + HF(g)
The enthalpy of the reaction can be calculated from bond energies using the formula;
ΔHreaction = Bond energy of reactants - bond energy of products
or
ΔHreaction = Bonds broken - bonds formed
[4(413) + 1(155) - 3(413) + 1(485) + 1(567)]
[(1652 + 155) - (1239 + 485 + 567)]
[1807 - 2291]
= - 484 KJ/mol
Answer:
65 degrees
Explanation:
m<3 and m<5 are vertical angles.
Based on the vertical angles theorem,
m<3 is congruent to m<5.
Therefore, if m<5 is given as 65°, thus:
m<3 = 65°
