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insens350 [35]
3 years ago
15

When writing a formula for a compound having a transition metal in it, _____.

Chemistry
1 answer:
Stella [2.4K]3 years ago
3 0

Answer:

it is always necessary to use the roman numeral as the assigned charge of the metal.

Explanation:

This is so that one would know which Transition metal is being used. For example copper (II) would be Cu²+

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How many neutrons does an element have if its atomic number is 55 and its mass number is 150?
Lynna [10]
With an atomic number of 55, that means there are 55 protons. Because electrons do not count towards atomic weight, the element would have 150-55 neutrons. So, 95 neutrons.
8 0
3 years ago
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The proton number of barium (Ba) is 56. It is in Group II of the periidic table how many electrons would you expect a barium ato
ella [17]

Answer:

A barium atom would be expected to contain 2 electrons in its outer energy level.

Explanation:

The columns of the periodic table are called groups. There are eighteen groups, numbered from 1 to 18.

The elements of each group have the same number of electrons in their last atomic shell, which is why they have similar chemical properties, because the chemical properties of chemical elements are strongly related to the electrons located in the last atomic shell.

That is, in a group, the chemical properties are very similar, because all the elements of the group have the same number of electrons in their last or last shells.

<u><em>A barium atom would be expected to contain 2 electrons in its outer energy level.</em></u>

7 0
3 years ago
Aspirin, C9H8O4, has a molar mass of 180.2 g/mol. A tablet contains 325 mg(0.325 g) of pure aspirin. Show all work
dusya [7]
A.how many moles of aspirin are in one tablet
0.325 g ( 1 mol / 180.2 g ) = 1.80 x 10^-3 mol

B. How many moles of oxygen are in one tablet of aspirin
1.80 x 10^-3 mol C9H8O4 ( 4 mol O / 1 mol <span>C9H8O4) = 7.21 x 10^-3 mol O
</span> 
C. How many atoms of carbon are in one tablet of aspirin 
1.80 x 10^-3 mol C9H8O4 ( 9 mol C / 1 mol C9H8O4 ) ( 6.022 x 10^23 atoms C / 1 mol C ) = 9.76 x 10^21 atoms C

D. How many grams of oxygen in one tablet of aspirin
 7.21 x 10^-3 mol O ( 16 g / mol ) = 0.12 g O
7 0
3 years ago
Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. which equation below best describes the balanc
love history [14]
Sodium metal and water form aqueous sodium hydroxide and hydrogen gas:

Na(s) + 2H2O(l) → (Na+)(aq) + 2(OH-)(aq) + H2(g)

Looks like your entries didn't translate well on screen, so find the solution with the coefficients and ions which match this one.
6 0
3 years ago
Anyone know what the answer is?
musickatia [10]
I say the second one
8 0
3 years ago
Read 2 more answers
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