Abiotic things are like rocks...dirt...water vs. biotic is living things or something that was living
In order to determine the number of protons in 20.02 mol of Ne, we use Avogadro's number to convert the number of moles to number of atoms, 1 mol = 6.022 x 10^23 atoms. From there, we must know the number of protons in a Neon atom, which is 10. Thus, the formula will be:
(20.02 mol Ne)x(6.022 x 10^23 atoms/mol)x(10 protons/1 atom Ne) =
1.2056 x 10^26 protons
Answer:
T =76.13 K
Explanation:
Given data:
Temperature of gas = ?
Volume of gas = 250 mL(250/1000 = 0.25 L)
Mass of helium = 0.40 g
Pressure of gas = 253.25 kpa (253.25/101 = 2.5 atm)
Solution:
Formula:
PV = nRT
First of all we will determine the number of moles of helium.
Number of moles = mass/ molar mass
Number of moles = 0.40 g/ 4 g/mol
Number of moles = 0.1 mol
Now we will put the values.
R = general gas constant = 0.0821 atm.L/ mol.K
T = PV/nR
T =2.5 atm× 0.25 L /0.1 mol ×0.0821 atm.L/ mol.K
T = 0.625 /0.00821/K
T =76.13 K
Answer:
1.42m/s
Explanation:
velocity=displacement/time
v=50/35=1.42m/s
Answer:
The net chemical equation is:
Explanation:
Condictions for extraction of copper metal allow the reaction ocurrs.
First step yield 2 moles of 
, that later reacts with C, to poduce the copper metal.
Necessarily, reactions has to be balanced to know the proportion of each element.
In the first step oxygen (O2) replace sulfur (S), yielding sulfur dioxide and copper(I) oxide:
Next, copper(I) oxide reacts with carbon (C), yielding copper (Cu) and carbon monoxide:
At the end, to complete the net chemical reaction, it is necessary multiply second step for 2, since it is obtained two moles of from the first step. Then, we can sum both steps, reminding that species present in both terms are canceled.
