Answer:
1 atom of zirconium
Explanation:
Zirconium sulfide or zirconium disulphide can be written as ZrS2.
Answer:
Multiply the number of moles of butane by its molar mass, 58.12g/mol, to produce the mass of butane. Mass of butane = 18.8g.
Explanation:
Part B:
The mass of water produced when 4.86 g of butane(C4H10) react with excess oxygen is calculated as below
calculate the moles of C4H10 used = mass/molar mass
moles = 4.86g/58 g/mol =0.0838 moles
write a balanced equation for reaction
2 C4H10 + 13 O2 = 8 CO2 + 10 H2O
by use of mole ratio between C4H10 to H2O which is 2:10 the moles of
H20= 0.0838 x10/2 = 0.419 moles of H2O
mass = moles x molar mass
=0.419 molx 18 g/mol = 7.542 grams of water is formed
The appropriate answer is c. It reduces pollution from runoff. Drip irrigation supplies water directly to the roots of the plants. This reduces loss of water from infiltration and evaporation. Water with nutrients is supplied directly to the roots of plants and so this reduces the chance of excess water infiltrating the soil and contaminating the ground water with pollutants.
Answer : The concentration of AB after 14.0 s is, 0.29 M
Explanation :
The expression used for second order kinetics is:
where,
k = rate constant =
t = time = 14.0 s
= final concentration = ?
= initial concentration = 1.50 M
Now put all the given values in the above expression, we get:
Therefore, the concentration of AB after 14.0 s is, 0.29 M
They have different neutron number and thus different mass number, but they are the same element.