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Rama09 [41]
3 years ago
8

Please help for brainliest Don’t skip and don’t answer if u don’t know.

Chemistry
1 answer:
Rainbow [258]3 years ago
8 0

Answer:

burning wood be a chemical change because it wouldn’t be able to go back to its original form. A physical change would be a broken pencil. The pencil is still a pencil, it’s just a physical change.But if it were burned it would be a chemical change.

Explanation:

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What is the angle between the carbon-chlorine bonds in the phosgene ( cocl2 ) molecule?
lina2011 [118]

Answer: The angle between the carbon-chlorine bonds in phosgene will be 120°

Explanation: Formula used to calculate the hybridization:

{\text{Number of electron pairs}} =\frac{1}{2}[V+N-C+A]

where,

V = number of valence electrons present in central atom i.e. carbon = 4

N = number of monovalent atoms bonded to central atom = 2

C = charge of cation = 0

A = charge of anion = 0

For COCl_2

{\text{Number of electron pairs}} =\frac{1}{2}[4+2-0+0]=3

The number of electron pairs are 3 which means that the hybridization will be sp^2 and the electronic geometry of the given molecule will be trigonal planar.

The bond angle in this electronic geometry is 120°

The structure of phosgene is attached below.

7 0
3 years ago
According to the big bang theory, galaxies formed a billion years after the "bang" from matter that clumped together due to grav
faust18 [17]
This is FALSE.

In the Bible, God created the heavens and the earth.

God said "Let there be light!" and there was.

Answer: False

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7 0
4 years ago
1. What is the mass of 22.4 L of H2 at STP?
Fed [463]
1.
n = m/2.016 g/mol = V/22.4 l
V = 22.4 l
Hence,
m = 2.016 g ≈ 2.02 g
B.) 2.02 g

2.
Balancing the equation, we get,
Mg + 2HCl → MgCl2 + H2
PV = nRT
V = nRT/P
V = 1.5 mol × 8.314 atm/(mol.K) × 298 K/(0.96 atm)
V = 3871.206
V ≈ 38.2 l
6 0
3 years ago
Read 2 more answers
Please help fast! I will give Brainliest if correct!
Digiron [165]
It's A; decomposition reactions involve one reactant becoming 2 or more products.
7 0
3 years ago
Read 2 more answers
Lift up the glass in one bowl, and place an effervescent tablet in the water beneath it. Quickly place the inverted glass over t
Ugo [173]

The glass containing the effervescence tablet has a greater air space than the other.

<h3>What is effervescence?</h3>

The term effervescence refers to the evolution of a gas. An effervescence tablet is a tablet that is designed to release the gas called carbon dioxide.

When we add the effervescence tablet and compare the level of the water in the two bowls, we will see that the water in the glass containing the effervescence tablet has a greater air space than the other.

Learn more about carbon dioxide:brainly.com/question/14445045

6 0
3 years ago
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