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kvv77 [185]
4 years ago
13

Which metal atom below cannot form a cation of several different charges?

Chemistry
1 answer:
Slav-nsk [51]4 years ago
4 0
Missing question: <span>Cr, Mn, Fe, Ba, Cu.
Answer is: Ba (barium).
Barium is metal from second group of periodic table of elements. Barium looses two electrons and has oxidation number +2.
Chromium has different oxidation numbers, usually +3 and +6, iron has oxidation numbers +2 and +3, copper +1 and +2 in their compounds.</span>
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A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
Salsk061 [2.6K]

Answer:

a=-3.37\ m/s^2

Explanation:

Given that,

A car accelerates negatively from 35m/s to 8m/s in 8s.

We need to find the car's acceleration.

Initial speed, u = 35 m/s

Final speed, v = 8 m/s

Time, t = 8 s

The acceleration of an object is equal to the rate of change of velocity. So,

a=\dfrac{v-u}{t}

Put all the values,

a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2

So, the acceleration of the car is equal to -3.37\ m/s^2.

8 0
3 years ago
What are the differences between molecule of an elements and molecules of a compound?​
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a compound is a pure substance made up of two or more elements chemically combined a molecule is defined as the smallest particle of an element which can exist separately elements are pure substances which can not be split into simple substances by chemical means the atom is defined as the smallest particle of an element which can take part in a chemical change so I think the difference between the molecule of a compound is bigger than the molecule of a compound

7 0
3 years ago
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Four friends wrote down descriptions of snow and sleet.
4vir4ik [10]

Answer:

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3 years ago
When the ventricles contract, blood is pumped
pantera1 [17]

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