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Strike441 [17]
4 years ago
12

Balance : Fe2O3 + Zn = Fe+ZnO

Chemistry
1 answer:
zysi [14]4 years ago
4 0

Answer:

Fe₂O₃ + 3Zn → 2Fe + 3ZnO

Explanation:

Step 1: RxN

Fe₂O₃ + Zn → Fe + ZnO

Step 2: Balance RxN

We need 2 Fe's on both sides.

We also need 3 O's on both sides.

  • If we multiply ZnO by 3, we will need 3 Zn's as well

Fe₂O₃ + 3Zn → 2Fe + 3ZnO

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This element has more than 50 but less then 75 protons , and it is in group 17
Scilla [17]

the element would be Iodine (I) bc it has 53 protons

7 0
4 years ago
There are two common isotopes of the element lithium. The first isotope has 3 protons and 3 neutrons. The second isotope has 3 p
lions [1.4K]

Hey there!

In hyphenated notation, we have the name of the element, a hyphen, then a number that is the sum of protons and neutrons.

The first isotope has 3 protons and 3 neutrons, so the sum is 6. Its name is lithium-6.

The second isotope has 3 protons and 4 neutrons, so the sum is 7. Its name is lithium-7.

Hope this helps!

4 0
4 years ago
Lana balanced an equation so that the result was 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr. Which most likely represents the starting e
seropon [69]

Answer:

C2H3Br + O2 → CO2 + H2O + HBr

Explanation:

The term balancing of chemical reaction equation has a unique meaning in chemistry. What it actually means is to ensure that the number of atoms of each element on the left hand side of reaction equation becomes equal to the number of atoms of the same element on the right hand side of the reaction equation.

When we look at the equation; C2H3Br + O2 → CO2 + H2O + HBr, the number of atoms of each element on the left and right hand sides of the given equation are not the same hence the equation is unbalanced.

If we look at the equation; 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr, the number of atoms of each element on both sides of the reaction equation are now equal, thus the later equation is the balanced version of the former.

6 0
3 years ago
What volume of solution is required to produce a 7.8M solution containing 23.6g of LiBr?
NARA [144]

Answer:

34.9 mL

Explanation:

First we <u>convert 23.6 g of LiBr into moles</u>, using its <em>molar mass </em>(86.845 g/mol):

  • 23.6 g ÷ 86.845 g/mol = 0.272 mol LiBr

Now we can <u>calculate the required volume</u>, using the <em>definition of molarity</em>:

  • Molarity = moles / liters
  • liters = moles / Molarity
  • 0.272 mol / 7.8 M = 0.0349 L

We can <u>convert L into mL</u>:

  • 0.0348 L * 1000 = 34.9 mL
7 0
3 years ago
At what temperature<br> (Celsius) will water change from a<br> liquid to solid?
fiasKO [112]

Answer:

0 degrees Celsius

Explanation:

6 0
3 years ago
Read 2 more answers
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