Answer:
the nucleus of an atom is positivley charged
Explanation:
Answer:
c. Latitude
Explanation:
The angular distance north or south from the earth's equator beginning at 0° at the equator and ending at 90° of either pole is the latitude.
The equator is a line of latitude that divided the earth into two hemispheres.
Only the equator is a great circle as a line of latitude. Others are small circles.
- Weather is the atmospheric condition of a place over a short period of time
- Climate is the average weather condition at a place over a long period of time.
- Altitude of a place is its elevation above a reference plane.
Answer:
the correct answer is four decimal places
Answer:
<u>3.16 liters O2</u>
Explanation:
I'll assume the C3H3 is really supposed to read C3H8, for propane.
C3H3(g) + 5 O2 (g) + 3 CO2 (g)+ 4 H20 (g)
<u>C3H</u><em><u>8</u></em><u>(g) + 5 O2 (g) + 3 CO2 (g)+ 4 H20 (g)</u>
It is unlikely that all the gases involved in this reaction will remain at STP due to the large amount of energy released, we'll assume STP since:
1) We are told STP and no other information is given, and
2) STP makes the problem much easier, since all gasses occupy 22.4 liters per mole of that gas.
The balanced equation tells us we need 5 moles of O2 for every 1 mole of C3H3: a molar ratio of 5/1 (moles O2/moles C3H8).
Calculate moles C3H8 in 0.632 liters of the stuff [metric term for compound]:
(0.632 liters)/(22.4 liters/mole) = 0.0282 moles C3H8
This means we'll need 5 times that number for the amount of O2 required. That comes to 0.1411 moles O2.
Convert that to volume: (0.1411 moles O2)*(22.4 liter/mole) = 3.16 liters O2
Answer:
4.47 x 10²² atoms
Explanation:
Given parameters:
Mass of Bismuth = 15.5g
Unknown:
Number of atoms = ?
Solution:
To find the number atoms, first solve for the number of moles in this element first.
Number of moles = 
Number of moles = 
= 0.074mole
So:
1 mole of a substance contains 6.02 x 10²³ atoms
0.074 mole of Bismuth will contain 0.074 x 6.02 x 10²³ atoms
= 4.47 x 10²² atoms
