The statements of Dalton atomic theory are
All elements are composed of tiny indivisible particles called atoms.
Atoms of the same element are identical. The atoms of any one element are different from those of any other element
Atoms of different elements can physically mix together or can chemically combine to form compounds
Chemical reactions occur when atoms are separated from each other, joined, or rearranged in a different combination.
Answer:
yep.
Explanation:
I love to wear oversized hoodies and I get soft comfy blankets and watch movies. Have a nice night! :)
The Calvin Cycle is the process that will be the last one to be affected by shorter periods of daylight. Carbon dioxide goes in the interior of a leaf through pores of plants, which is called stomata and spreads into the stroma of the chloroplast this is the site of the Calvin cycle reactions, wherein sugar is produced and synthesized. These reactions are also called the light-independent reactions because they are not directly driven by light.
Answer:
A) wrong. The molar is same so A is hevier
B)
Explanation:
Xg/mol × (same molar)= g
→ bigger molar bigger mass
Answer:
141.0 g NaN₃.
Explanation:
It is a stichiometric problem.
Firstly, we should wright the reaction as a balanced equation:
2NaN₃ → 2Na + 3N₂
It is clear that 2.0 moles of NaN₃ decompose to 2.0 mole of Na and 3.0 moles of N₂.
Then we should convert the volume of N₂ (70.0 L) to moles via using the gas law of ideal gas: PV = nRT, n = PV / RT,
Where, P is the pressure of the gas in atm (P = 1.2 atm).
V is the volume of the gas in L(V = 70.0 L).
R is the general gas constant (R = 0.082 L.atm/mol.K).
T is the temperature in K(T = 315 K).
∴ n of N₂ = PV / RT = (1.2 atm) (70.0 L) / (0.082 L.atm/mol.K) (315 K) = 3.252 mole.
From the stichiometry:
2.0 moles of NaN₃ decomposes to → 3.0 moles of N₂
??? mole of NaN₃ decomposes to → 3.2520 moles of N₂
The number of moles of NaN₃ = (2.0 moles of NaN₃) (3.2520 moles of N₂) / (3.0 moles of N₂) = 2.168 mole.
Finally, we can convert the number of moles of NaN₃ to mass using the relation: m = n x molar mass.
Molar mass of NaN₃ = 65.0 g/mol.
the mass of NaN₃ = n x molar mass = (2.168 mole) (65.0 g/mol) = 140.92 g ≅ 141.0 g.