Compounds are classified according to the elements that make them up. For example, oxides contain one or more oxygen atoms, hydrides contain one or more hydrogen atoms.
compounds form different types of bonds too. a metal and nonmetal element will create an ionic bond, two nonmetal elements create covalent bonds
Her displacement = 18 m
<h3>Further explanation</h3>
Given
walks 50 m north and 32 m south
Required
displacement
Solution
Displacement shows vector motion that has magnitude and direction.
Displacement only looks at the distance between the starting point and the end point
Because it takes direction into account, a positive or negative sign is required
We determine that in vertical motion the upward direction is positive and the downward direction is negative
While the horizontal movement to the right is positive and the left has a negative sign
Students moving north (from the starting point) are moving positively by + 50 m
then moving south which means moving negative as far as -32 m
So that the displacement is
When the water in the cracks freezes, it expands by 9 to 10 percent, exerting pressure on the rock, according to BBC Bitesize. This action can widen the cracks in the rock, and when the temperature rises above freezing, the ice thaws, allowing the water to seep further into the cracks.
Answer:
someone people use Doppler radar
Explanation:
Answer:
D. 6.3 x 10-5 mol/L NaOH
Explanation:
Alizarin yellow is an indicator that is yellow when pH < 10.1. In the same way, thymol blue is blue when pH > 9
That means the pH of the solution is between 9 - 10.1
Any acid as HCl could have a pH of these.
The solution of 3.2x10⁻⁴M NaOH has a pH of:
pOH = -log[OH-] = 3.49
pH = 14-pOH = 10.51. The pH of the solution is not 10.5
Now, the solution of 6.3x10⁻⁵M NaOH has a pH:
pOH = -log[OH-] = 4.2
pH = 14-pOH = 9.8
The pH of the solution could be 9.8. Right option is:
<h3>D. 6.3 x 10-5 mol/L NaOH</h3>
