Answer:
1 × 10^10 years
Explanation:
The current distance of the Moon from the Earth = 400,000 km
Every year, the Moon moves: 40 millimeters away from the Earth
From the question:
1 millimeter = 1 x 10^-6 kilometers
40 millimeters =
= 40 ×1 × 10^-6km
= 4 × 10^-5km
= 0.00004km
In approximately how many years will the moon be twice as far from the Earth as it is now, assuming that nothing else changes?
Twice as far = 400,000km × 2
= 800,000km
0.00004km = 1 year
400000km =
= 400,000km/0.00004km
= 10000000000years
= 1 × 10^10 years
Hello!
The approximate bond angle around the central carbon atom in acrolein is
120°
The structure of acrolein is shown in the figure below. From the structure, we can deduce that the central carbon atom is in an sp2 hybridization (Atoms with a double bond hybridize in an sp2 fashion).
Atoms with sp2 hybridization have trigonal planar geometry, in this kind of hybridization, bonds are oriented the farthest away possible from each other, to minimize overlapping and the angle that allows that is 120°.
Have a nice day!
Answer:
pH = 2.25
Explanation:
pH is a measurement in chemistry defined as the -log [H₃O⁺]. Molarity [], is defined as the ratio between moles of solute (HCl) and the liters of solution
To solve this question we must find the molarity of the H₃O⁺ knowing: [HCl] = [H₃O⁺]
[HCl]:
0.0084moles / 1.500L
= 0.0056M = [HCl] = [H₃O⁺]
pH = -log [H₃O⁺] = -log [0.0056M]
<h3>pH = 2.25</h3>