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dusya [7]
3 years ago
10

Which one is true? Elements in the same row have the same number of:

Chemistry
1 answer:
RideAnS [48]3 years ago
4 0

Explanation:

Elements in same row (i.e, from left to right) have the same number of electron shells.

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Plz say if it is a b c or d on both
Digiron [165]

Answer:

whats both

Explanation:

7 0
3 years ago
Read 2 more answers
A 44.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 22.0 ml of koh at 25 ∘c.
Helga [31]
The reaction between KOH and HBr is as follows ;
KOH + HBr ---> H₂O + KBr
Stoichiometry of base to acid is 1:1 molar ratio
Both are strong acid and strong base therefore complete ionization takes place
The number of KOH moles added - 0.50 M / 1000 mL/L x 22 mL = 0.011 mol
the number of HBr moles - 0.25 M /1000 mL/L x 44 mL = 0.011 mol
the number of H⁺ ions and OH⁻ ions are equal therefore the whole amount of acid has been completely neutralised by base.
No remaining acid nor base, therefore solution is neutral.
pH = 7 
thats the pH value for a neutral solution

4 0
4 years ago
What is the change in atomic mass when an atom emits an alpha particle? A. decreases by 2 B. decreases by 1 C. decreases by 4 D.
Misha Larkins [42]
Answer is "C"

alpha decay is an emission of ₂⁴He nucleus. If an element undergoes an alpha decay, the mass of the daughter nucleus formed is reduced by 4 compared to mass of parent atom and atomic number is reduced by 2 compared to atomic number of parent atom.
7 0
3 years ago
Spell out the full name of the compound.
Natalka [10]

Explanation:

Step one look for the longest chain of carbon atoms

Longest chain is 7 C atoms

Step 2 look for double bonds or others functional groups

it is present in 3rd carbon

Therefore IUPAC name is 3-heptene

From point of stereochemistry it can also be written as trans-3-heptene as the hydrogens are placed in opposite side of the C=C bond.

Hope this helps...

3 0
4 years ago
Which statement accurately describes the chemical symbol of an element?
sweet [91]

Answer:

always begins with a capital letter

Explanation:

quizlet

6 0
3 years ago
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