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Salsk061 [2.6K]
2 years ago
5

What group is the element barium(Ba) In?A. 1B. 6C. 56D. 4​

Chemistry
1 answer:
LenaWriter [7]2 years ago
7 0
Ummmmmmmmmmm 56 yes 56
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An object has a total mechanical energy of 150 J. At point A, the object has a kinetic energy
nika2105 [10]

Answer:

60 J

Explanation:

The law of conservation of energy states that energy is neither created nor destroyed, just converted into different forms. This means the total mechanical energy of the object at point A will be the same as the total mechanical energy at point B, and the question tells us the total of that mechanical energy is 150 J. Note we are assuming no energy is lost from the system as heat.

At point B, if the potential energy is 90 J, the remainder of the 150 J total must be kinetic energy. KE = 150 J - 90 J = 60 J.

8 0
3 years ago
The ________ ion is represented by the electron configuration [ar]3d2.
Tresset [83]
The Ti 2+ ions is  represented  by  electron  configuration  (Ar)3d2. Titanium is in  atomic  number  22  and  its  electronic  configuration  is  (Ar)3d2 4s2.  Titanium loss two  electron that  is  4s2 electrons  hence the  electronic  configuration ( Ar)3d2.  4s2 is  the  valence electron  hence  it   the  one   which  is  lost  to  form  Ti2+
3 0
3 years ago
Read 2 more answers
What is the emperical formula of a compound containing 40.1% carbon and 6.6% hydrogen​
levacccp [35]

Answer:

CH₂

Explanation:

Given parameters:

Percentage composition:

          Carbon  = 40.1%

          Hydrogen  = 6.6%

Unknown:

Empirical formula of the compound  = ?

Solution:

The empirical formula of a substance is its simplest formula.

 Elements                             Carbon                             Hydrogen

Percentage

Composition                           40.1                                     6.6

Molecular mass                        12                                         1

Number of moles                  40.1/12                                  6.6/1

                                                3.342                                    6.6

Divide through by

the smallest                         3.342/3.342                           6.6/3.342

                                                      1                                        2

So the empirical formula of the compound is CH₂

5 0
3 years ago
Calculate 18.9 minus 2.15. Round the answer to the correct number of significant figures.
Lerok [7]
The answer is 16.75 it rounds to 17 Hope this helps! ;D
7 0
3 years ago
What kind of change is heating of mercuric oxide? ​
mario62 [17]

Answer:

Chemical change.

Explanation:

When it is heated it decomposes into mercury and oxygen gas. The mercury oxide reactant becomes the silver color of mercury. Hence, a color change can be noticed throughout the reaction.

7 0
2 years ago
Read 2 more answers
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