1. Generally speaking, where on the periodic table are the elements that form ions requiring!Roman numeral in their names?

Answers

Answer 1

Answer:

Answer:

The middle, or the transitional metals

Explanation:

When naming elements, we use roman numerals to indicate what their charge is. The charge of an element is affected by their number of valence electrons (outermost electrons).

Transitional metals are generally multivalent, meaning that element has more than one possible number of valence electrons. This makes them have more than one possible charge. Roman numerals indicate which charge of that element is used/discussed.

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!!!!HELP ASAP 10 points!!!Which of the following families contains liquids, solids, and gases?A. The alkali metals
B. The noble gases
C. The halogens
D. The alkaline earth metals

Answers

The halogens is correct

Answer:

C. The halogens

Explanation:

What is the [H30+) in a solution with (OH'] = 2.0 x 10-3 m?2.0 x 10-3M
5.0 x 10-11M
2.0 x 10-12M
5.0 x 10-12 M
1.0 10-12 M

Answers

Answer: 5.0 x 10-12 M

Explanation:

It is well known that; pH + pOH = 14.

pOH = - log [ OH-]

= - log [ 2.0 x 10 ∧-3]

= 3 - log 2

= 3 - 0.301 = 2.7 approximately.

recall that, pH + pOH = 14, therefore; pH = 14 - 2.7 = 11.3

pH= - log [ H3O+]

11.3 = - log [H3O+], take the antilog of 11.3, gives us;

[H3O+] = antilog of - 11.3, which gives 5.0 x 10-12 M

How The Distance Between two celestial Bodies Impacts Their gravitational attraction

Answers

The closer they are, the greater the gravitational pull they will have on each other. Size also affects the gravitational pull of the celestial bodies because the larger the body the greater the pull it will have.

How long would it take for a car to travel 200km if it has an aventage speed of 55 km/ hr

Answers

Answer: 3.64 hours

Explanation:

Formula of Average speed : $\text{Average speed}=\frac{\text{Distance}}{\text{Time}}$

Given : Distance = 200km ; Average speed = 55 km/ hr

To find : Time

Substitute values for distance and average speed in the above formula , we get

$55=\frac{200}{\text{Time}}\n\n\Rightarrow\text{Time}=(200)/(55)=3.63636363636\approx3.64\ hr$

Hence, it would take 3.64 hours for a car to travel 200km .

What distance will a truck travel in 3 hours at an average speed of 50 miles per hour?

Answers

150 miles. 50×3=150. It's that easy.

Why don't the oceans simply reabsorb the water that evaporates?

Answers

The water evaporates into the clouds

because the oceans already have a ton of water in them so they don't really need to absorb the water again that evaporates

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