What percentage of atoms in the entire universe are hydrogen atoms?

A sample of hydrogen peroxide (H202) has 2.0 grams of hydrogen (H) and 32 grams of oxygen (O). What is the percent composition o

Leto [7]

Answer:

O = 94.117%

H = 5.882%

Explanation:

Hydrogen peroxide (H202) Molar Mass = 34g

OH 1- 17g/mol

H 1+ = 1g/mol

O = 16g/mol

2 Grams H

32 grams O

Percentage composition of Hydrogen peroxide

O = 32/34 = 94.117%

H = 2/34 = 5.882%

3 0

4 years ago

A tetrahedral carbon is ____________ hybridized while a linear carbon is ____________ hybridized. Two different compounds that h

nalin [4]

Answer:

1. Sp^3; Sp.

2. Isomers.

3. Weaker.

4. Atomic; hybrid.

5. Pi.

6. Electronegativity.

7. Resonance structures.

8. Sigma.

Explanation:

1. A tetrahedral carbon is Sp^3 hybridized while a linear carbon is Sp hybridized. A tetrahedral carbon typically comprises of four bonds that are 109. 5° apart while a linear carbon atom comprises of two (2) bonds that are 180° apart.

2. Two different compounds that have the same molecular formula are known as isomer. For example Butane and Isobutane, Methoxyethane and Propanol have the same molecular formula (numbers of hydrogen and carbon atoms) but different structural formula.

3. Pi (π) bonds are generally weaker than sigma (σ) bonds. This is because the orbital paths of Pi bonds are parallel thereby causing an overlap.

4. Hybridization is the combination of two or more atomic orbitals to form the same number of hybrid orbitals, each having the same shape and energy.

5. A Pi bond is formed by side-by-side overlap of two p orbitals.

6. The electronegativity is a measure of an atom’s attraction for electrons in a bond and indicates how much a particular atom "wants" electrons.

7. Two Lewis structures that have the same atomic placement and σ structure but a different arrangement of π electrons are called resonance structures.

8. All single bonds are Sigma bonds.

7 0

3 years ago

Which concept describes the formation of four equivalent, single, covalent bonds by carbon in its compounds that resembles metha

Montano1993 [528]

Carbon is special and unique because it is able to form different compounds with a lot of elements, including itself. When it bonds with itself, this is possible because of the concept of hybridization. It is the mixing of atomic orbitals into a new hybrid orbital. In this case, methane is formed through the sp³ hybridization.

4 0

3 years ago

Which one from the drop down box

mel-nik [20]

CH4+ 2O2---> CO2+ 2H2O I believe would be correct.

7 0

4 years ago

he first solution contains 25 % acid, the second contains 35 % acid, and the third contains 55 % acid. She created 100 liters of

photoshop1234 [79]

Answer:

Volume of first solution = 20 Liters

Volume of second solution = 20 Liters

Volume of third solution = 60 Liters

Explanation:

Let the volume second solution used= y

Let the volume of third solution used = 3y

Let the volume of first solution used = 100 - (y +3y)

= 100- 4y

The volume of acid in the first solution ( V₁) = 25% of (100-4y)

= 25-y

The volume of acid in the second solution(V₂) =35% of y

= 0.35y

The volume acid in the third solution (V₃) = 55% of 3y

=1.65y

The Volume of acid in Mixture (V₄) = 45% of 100

= 45

From the conservation of volume:

V₄ = V₁ + V₂ + V₃

45 = (25-y )+ 0.35y + 1.65y

45 =25 -y + 0.35y + 1.65y

45 -25 = y

y = 20

So the volume of first solution used = 100- 4y

= 100- 4(20)

= 20 Liters

So the volume of second solution used = y

= 20 Liters

So the volume of third solution used = 3y

= 3(20)

= 60 Liters

3 0

3 years ago