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n200080 [17]
3 years ago
9

Please help on this question it’s the only one i can’t do !!

Chemistry
1 answer:
miv72 [106K]3 years ago
7 0

Answer:

70%of 2000 = 1400

2000 tonnes of hematite contains 1400 tonnes iron oxide .

1400 tonnes of fe2O3

fe2O3 have molar mass 159.69

calculate moles = given mass/molar mass

moles = 1400000000/159.69

moles = 8766986

one mole contains = 112 g of fe

so 8766986 moles will contain = 112×8766986

= 981,902,432 grams of ferrous

which is nothing but equal to 981.90 tonnes of iron!!

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5 0
4 years ago
Using the electronegativity values in the chart below, which bond is the most polar?
lorasvet [3.4K]

Answer:

C-O

Explanation:

you have to check the all four bonds and find out their electronegativity difference. Whichever has the largest difference, is your answer.

  1. N-O = 3.04 - 3.44 = -0.4
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3 years ago
Atoms with the same number of protons but different number of neutrons are called.......
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4 0
3 years ago
Convert a speed of 141 mi/h to units of feet per minute show work.
ozzi

Answer:

12408 feet per minute

Explanation:

Given: Speed is 141 mi/h

To find: speed in units of feet per minute

Solution:

Use the following units to convert the given speed into feet per minute.

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141 mi/h =\frac{141(5280)}{60} =12408 feet per minute.

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