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Amiraneli [1.4K]
3 years ago
14

Help me please my family brainly​

Chemistry
1 answer:
suter [353]3 years ago
5 0

Answer:

a) In the first chemical reaction, reduction of Sulphur dioxide occurs in which oxygen is removed. In oxidation reaction, oxygen is added to Magnesium forming Magnesium oxide.

b) Hydrogen bromide react with chlorine molecule, oxidation of hydrogen bromide is done and hydrogen is detached from bromine atom and reduction occurs when hydrogen is added to chlorine molecule forming hydrochloric acid and bromine molecule.

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Plz help me i swear will mark you brainiest :(
vladimir1956 [14]

Answer:

C. the relative molecular mass of the compound

Explanation:

Like molecular formulas, empirical formulas are not unique and can describe a number of different chemical structures or isomers. <u>To determine an empirical formula, the relative molecular mass of the composition of its elements</u> can be used to mathematically determine their ratio.

7 0
3 years ago
Which of the following are characteristics of ionic compounds? Check all that apply. have high melting and boiling points are ha
Oliga [24]

Answer:

A-Have high melting and boiling points

B- Are hard

D- Are good conductors of electricity when dissolved in water

Explanation:

6 0
3 years ago
Read 2 more answers
The smallest unit of an element
Sliva [168]
The smallest unit of an element that retains the chemical and physical properties of an element is an Atom.
8 0
3 years ago
A student estimated a mass to be 275 g but upon carefully measuring it found the actual mass to be 260 g. what is the percent er
olga2289 [7]

Answer:

5.77% Error.

Explanation:

Given an experimental value of 275 g , and a theoretical value of 260 g, the percent error can be found using the equation:

\% \: error \:  =  \frac{ |theoretical \: value \:  - \: experimental \: value | }{theoretical \: value}  \times 100

% Error = ( | 260 - 275 | / 260 ) × 100 = ( | - 15 | / 260 ) × 100 = ( 15 / 260 ) × 100 = 1500/260 = 300 / 52 = 5.769230769230.. ≈ 5.77%

7 0
4 years ago
The _____ agent is the substance in a redox reaction that accepts electrons.
777dan777 [17]
B. oxidizing 

In the reaction the oxidizing agent is reduced.
8 0
3 years ago
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