3 years ago

Which of the following is a characteristic of a base?

1 answer:

4 0

Answer:

A. pH greater than 7

Explanation:

Because a base has a pH scale of 8 to 14

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Viefleur [7K]

Oxygen has Atomic number 8 so all isotopes have 8 protons and 8 electrons.

So the number of neutrons in Oxygen-18 = 18 - 8 = 10.

Option B is the correct one.

5 0

4 years ago

Tamiku [17]

Answer:

461.88 N

Explanation:

$F_{g}$ = Weight of the swing = 800 N

$T$ = Tension force in the rope

$F$ = Horizontal force being applied by the partner

Using equilibrium of force in vertical direction using the force diagram, we get

$T Cos30 = F_{g}\\T Cos30 = 800\\T = \frac{800}{Cos30} \\\\T = 923.76 N$

Using equilibrium of force in horizontal direction using the force diagram, we get

$F = T Sin30\\F = (923.76) (0.5)\\F = 461.88 N$

6 0

3 years ago

AveGali [126]

B. In step 3

They incorrectly solved for x. It should have been x=-3 and x=5

3 0

3 years ago

Strike441 [17]

Um okay then????????????

7 0

3 years ago

murzikaleks [220]

the answer in my opinion would be A

7 0

3 years ago