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3 years ago

What is the empirical formula of a substance that contains 5.28 g of c, 0.887 g of h, and 3.52 g of o?

Chemistry

2 answers:

kicyunya [14]3 years ago

8 0

Not sure but I think it is C2H4O

kifflom [539]3 years ago

8 0

Answer:

C₂H₄O

Explanation:

Given data

Mass of C: 5.28 g

Mass of H: 0.887 g

Mass of O: 3.52 g

The total mass of the compound is 5.28 g + 0.887 g + 3.52 g = 9.69 g

In order to determine the empirical formula of the compound, we must follow a series of steps.

Step 1: Determine the percent composition

C: (5.28g/9.69g) × 100% = 54.5%

H: (0.887g/9.69g) × 100% = 9.15%

O: (3.52g/9.69g) × 100% = 36.3%

Step 2: Divide each percentage by the atomic mass of the element

C: 54.5/12.0 = 4.54

H: 9.15/1.01 = 9.06

O: 36.3/16.0 = 2.27

Step 3: Divide all the numbers by the smallest one

C: 4.54/2.27 = 2

H: 9.06/2.27 ≈ 4

O: 2.27/2.27 = 1

The empirical formula is C₂H₄O.

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Gold is currently trading at very high price. Suppose that gold is selling for around $1860/ounce. How

Ugo [173]

Answer:

The answer is "3.81041978"

Explanation:

$\to 1 \ OZ= 28.349523125 \ grams\\\\$

$=28.349523125\times {1000} \ miligrams\\\\= 28349. 5231 \ miligrams\\$

In 1860 $= 28349.5231 \ miligrams\\$

$\to In \$ \ 1 = \frac{28349.5231}{1860} \ \ miligrams\\$

$= 15.2416791 \ miligrams$

$\ In \ 1 \ quarter = \$ \ 0.25$

$\to \$ \ 0.25 = 15.2416791 \times 0.25 \ miligrams\\$

$= 3.81041978$

3 0

3 years ago

2Pb(s) + O2(aq) + 4H+(aq) → 2H2O(l) + 2Pb2+(aq)

defon

Answer:

The answer to your question is 0.269 g of Pb

Explanation:

Data

Lead solution = 0.000013 M

Volume = 100 L

mass = 0.269 g

atomic mass Pb = 207.2 g

Chemical reaction

2Pb(s) + O₂(aq) + 4H⁺(aq) → 2H₂O(l) + 2Pb₂⁺(aq)

Process

1.- Calculate the mass of Pb in solution

Formula

Molarity = $\frac{number of moles}{volume}$

Solve for number of moles

Number of moles = Volume x Molarity

Substitution

Number of moles = 100 x 0.000013

Number of moles = 0.0013

2.- Calculate the mass of Pb formed.

207.2 g of Pb ----------------- 1 mol

x g ----------------- 0.0013 moles

x = (0.0013 x 207.2) / 1

x = 0.269 g of Pb

8 0

3 years ago

Read 2 more answers

WILL GIVE BRAINLIEST Explain why HS2 has a bent geometry, while BeH2 has a linear geometry.

Natali5045456 [20]

Answer:

H2S has a bent geometry, while BeH2 has a linear geometry because: presence of lone pair in H2S

Absence of Lone pair in BeH2

Explanation:

Structure of H2S :

Atomic number of S = 16 = 1s(2 )2s(2) 2p(6) 3s(2 )3p(4)

Outer most shell has 6 electron

Valence electron (Involved in bonding) = 6

Out of these 6 electrons ,

2 electrons are formed in bonding with Hydrogen

Rest 4 are non- bonding and present as lone - pair

H2S exist - sp3 hybridisation

There are 2-Lone pair on S in H2S (look at the image attached)

Structure of H2S :

Atomic number of Be = 4 = 1s(2 ) 2s(2)

Valence electron (Involved in bonding) = 2

These 2- electron are involved in bonding with two Hydrogen and form liner shape.*Form sp - hybridized

Hence shape is linear because it has non - lone pair.

VSEPR : According to this theory lone pair causes repulsion to the bond and cause unstability in the molecule.

Hence the bonds shifts away from lone pairs . This is why H-S bonds in H2S shifts way from lone pair

5 0

3 years ago

CHEMISTRY QUESTION WILL MARK YOU BRAINLIEST!

sammy [17]

Answer:

Based on Boyle's law, which of the following statements is true for an ideal gas at a constant temperature and mole amount?

A) Pressure is directly proportional to volume.

B) Pressure is inversely proportional to volume. CORRECT ANSWER!!!

C) The number of collisions is independent of pressure.

D) The number of collisions decreases with increase in pressure.

B is the CORRECT answer!!!

7 0

3 years ago

DESPERATE WILL GIVE BRAINLIST AND THANKS

Annette [7]

Answer:

20 grams

Explanation:

40g= 300

x = 150

cross multiply, 40*150/300

6000/300= 20g

8 0

3 years ago