Answer: -
The next low tide occur at 12 noon, because the coastline will turn 90 degrees from the moon.
Explanation: -
Time taken for the earth to rotate = 24 hours.
Each day there are two high tides and low tides.
Thus the duration between two high tides is 12 hours and between 1 high tide and 1 low tide is 6 hours.
Thus the time of next low tide is 6 am + 6 hours = 12 noon.
Now in 24 hours the coastline turns 360 degrees.
In 6 hours it will travel (360 x 6) / 24 =90 degrees.
Thus the next low tide occur at 12 noon, because the coastline will turn 90 degrees from the moon.
The cations has positive charges that are metals while the anions have negative charges that are non-metals. Upon reaction, there is an exchange in charges that are reflected in the subscripts of the atoms. In this case, compound AX2 must have a cation, A belonging to group 2 A with +2 charge and anion, X belonging to Group 7A with -1 charge. Answer is D.
There is no transfer of energy in the reaction.
Answer:
Rows and columns.
Explanation:
Each atom gives up some of its electrons to create a kind of sea of these randomly moving charged particles. It's these free-flowing electrons that make metals conductive.
Answer:
4. 1.18 mol·L⁻¹
14. See below.
Explanation:
4. Dilution calculation
V₁c₁ = V₂c₂
Data:
V₁ = 200 mL; c₁ = 5.6 mol·L⁻¹
V₂ = 950 mL; c₂ = ?
Calculation:
c₂ = c₁ × V₁/V₂
c₂ = 5.6 mol·L⁻¹ × (200/950) = 1.18 mol·L⁻¹
The new concentration is 1.18 mol·L⁻¹
.
14. Boyle's Law graphs
We can write Boyle's Law as
pV = k or p = k/V or V= k/p
p and V are inversely related.
(a) As pressure increases, volume decreases. Thus, a graph of V vs p is a hyperbola.
(b) p = k/V =k(1/V)
1/V = (1/k)p
y = m x + 0
A graph of 1/V vs p is a straight line.
