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fomenos
3 years ago
9

How does the law of conservation of mass apply to this reaction C2H4+4O2-->4H2O+2CO2 .Only the oxygen needs to be balanced B.

The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydrogen and carbon C.The law of conservation of mass has already been applied D. Each element needs to be balanced
Chemistry
2 answers:
r-ruslan [8.4K]3 years ago
6 0
C2H4+4O2-->4H2O+2CO2

the answer is C
Novosadov [1.4K]3 years ago
5 0
The answer would be c.
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PLZZZZ NEED ANSWERS ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️​
Wewaii [24]

Answer:

okay so, 20 Ca goes to group 2A and the chemical group family is alkaline earth metal family

54 Xe goes to group 8A the chemical group family is the noble gas family

37 Rb goes to group 1A the chemical group family is alkali metal family

17 Cl goes to group 7A the chemical group family is the halogen family

Explanation:

5 0
3 years ago
Identify each of the following mixtures as either homogeneous or heterogeneous and as a solution, a suspension, or a colloid.
MrRissso [65]
<h2>Answers to the rest of the assignment:</h2>

**Check for proof photos at the bottom.**

__________________________________________________________

Identify each of the following mixtures as either homogeneous or heterogeneous and as a solution, a suspension, or a colloid.  

Cranberry juice at the store

A. homogeneous

C. solution

Smoke  

B. heterogeneous  

D. colloid

__________________________________________________________

Identify each of the following mixtures as either homogeneous or heterogeneous and as a solution, a suspension, or a colloid.  

Blood

B. heterogeneous  

E. suspension

Salad dressing

B. heterogeneous  

E. suspension

__________________________________________________________

Shown here is a person shaving.  Under magnification, the shaving foam might look like the image above the shaver. What type of mixture does the foam demonstrate? Give your reasoning.

Foam is a colloid. Colloids includes gas dispersed in a liquid and it also includes gas dispersed in a solid

On the next slide, you can select any answers you want, or you can select nothing. There's no wrong answer.  

__________________________________________________________

A student squeezes several oranges to make a glass of orange juice. The juice contains pieces of orange pulp mixed with the juice. Explain why this drink can be considered a combination of a suspension and a solution.

The juice contains sugars, plant pigments, and other chemicals dissolved in water. This is a solution. The pieces of orange pulp will rise to the top or settle to the bottom of the juice if it is allowed to sit. The pieces of pulp mixed with the juice form a suspension

On the right side, you can also select any answers or none at all. There is no wrong answer.

__________________________________________________________

<h2>Explanation:</h2>

There are two main types of mixtures, homogeneous mixtures and heterogeneous mixtures. The components of a homogeneous mixture are evenly distributed throughout the mixture. The properties of a mixture are the same everywhere. The components of a heterogeneous mixture are not evenly distributed. Different regions of this mixture have different   properties.

Particles in a homogeneous mixture do not settle down or separate when left alone. Particles in a heterogeneous mixture eventually separate or settle when left alone.

  • Colloids are a type of heterogeneous mixture that do not naturally settle out quickly, and can be separated with different methods.
  • A suspension is another type of heterogeneous mixtures in which the components of the mixture will quickly settle out or can be filtered or separated.

Here are photos of Edge just incase.

6 0
3 years ago
Consider the following equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover.
disa [49]

Answer:

a) 4869 kJ will be released

b) 43.86 g of octane

Explanation:

The heat of combustion is the amount of heat released when 1 mol of a substance reacts with enough oxygen .

Since the heat of combustion  is per mol of combustible  substance what we are required to do in  this problem is calculate number moles in the reactions although in a different manner.

a) MW C3H6O = 158 g/mol

mol C3H6O = 158 g x 1 mol/58.08 g = 2.72

-1790 kJ/ mol x 2.72 mol = 4869 kJ

b) Here we are asked the mass of octane to produce 1950 kJ of heat knowing that per mol of octane we get 5074.1 kJ, then

1 mol / 5074.1 kJ   x  1950 kJ = 0.384 mol

mass C8H18 = 0.384 mol x 114.23 g/mol = 43.86 g

4 0
4 years ago
How to make a volcano lamp fuse
lakkis [162]

Answer:

with water

water water water water water water water water 6

3 0
3 years ago
Why is the C-H bond length and strength different for ethyne, ethene and ethane?
stepan [7]

Answer:

The length and strength of the C-H bond are different for ethine, ethylene and ethane due to the difference between the s characters (sp 3, sp 2, sp) in each chemical structure, which gives stronger bonds. For example, the length of the C-H bond in ethino is 1.06Å, which is also less than in ethane (1.09Å) or ethylene (1.08Å).

Explanation:

6 0
4 years ago
Read 2 more answers
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