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Yanka [14]
3 years ago
15

How many atoms are in al2o3

Chemistry
1 answer:
pentagon [3]3 years ago
6 0
<span>There are five. Two atoms of aluminum, and three atoms of oxygen.There are 5</span>
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70 oz of protein how many grams of protein are
Snowcat [4.5K]
There is a bout 7 grams of protein in 1 ounce of meat, so 7*70=
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3 years ago
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What is the mass percent of oxygen (0) in SO2?
vazorg [7]

Answer:

D. (16.0 g + 16.0 g) × 100% / (32.1 g + 16.0 g + 16.0 g) = 49.9%

Explanation:

Step 1: Detemine the mass of O in SO₂

There are 2 atoms of O in 1 molecule of SO₂. Then,

m(O) = 2 × 16.0 g = 16.0 g + 16.0 g = 32.0 g

Step 2: Determine the mass of SO₂

m(SO₂) = 1 × mS + 2 × mO = 1 × 32.1 g + 2 × 16.0 g = 32.1 g + 16.0 g + 16.0 g = 64.1 g

Step 3: Detemine the mass percent of oxygen in SO₂

We will use the following expression.

m(O)/m(SO₂) × 100%

(16.0 g + 16.0 g) × 100% / (32.1 g + 16.0 g + 16.0 g) = 49.9%

5 0
3 years ago
NO2+H4➡2 H2O+N What are the elements
Firdavs [7]
They are nitrogen, oxygen, hydrogen
6 0
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How many litres (L) of oxygen at STP can be obtained from 110 g of potassium chlorate? [R=0.0821 L.atm/K.mol]
lisabon 2012 [21]
Balance the equation first:

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Moles of KClO3 =  110 / 122.5 = 0.89

Following the balanced chemical equation:
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So, O2 = (3 / 2) x  0.89

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So, Volume at STP = nRT / P

T = <span>273.15 K
P = 1 atm

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3 0
3 years ago
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