1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Varvara68 [4.7K]
4 years ago
5

How do i answer this can someone please help me i need it for tomorrow.

Chemistry
1 answer:
Zigmanuir [339]4 years ago
6 0
Just calculate the average
You might be interested in
7. The smallest representation of an lonic compound is
BlackZzzverrR [31]

Answer:

c Formula unit

hope this helped

3 0
3 years ago
Which of the following will lower the rate of reaction? (there are 2 answers to select)
miskamm [114]

Answer:

B. Adding an enzyme to the reaction

D. decreasing the concentration of a reactant.

5 0
3 years ago
Write the empirical formula for at least four ionic compounds ca2+.v5+,f-,s2
Vesna [10]
Using these Elements. Here would be the 4 ionic compounds.

CaF2
VF5
CaS
V2S5
8 0
4 years ago
Which of the following pairs of chemical reactions are inverses of each other? Answer options: a. Hydrogenation and alkylation b
mariarad [96]

Answer:

d. Oxidation and reduction

Explanation:

For this question we have to remember the definition of each type of reaction:

-) <u>Hydrogenation</u>

<u />

In this reaction, we have the addition of hydrogen to a molecule. Usually, an alkene or alkyne. In the example, molecular hydrogen is added to a double bond to produce an alkane.

-) <u>Alkylation</u>

<u />

In this reaction, we have the addition of a chain of carbon to another molecule. In the example, an ethyl group is added to a benzene ring.

<u />

-) <u>Hydrolysis</u>

<u />

In this reaction, we have the breaking of a bond by the action of water. In the example, a water molecule can break the C-O bond in the ester molecule.

-) <u>Halogenation</u>

<u />

In this reaction, we have the addition of a halogen (atoms on the VIIIA group). In the example, "Cl" is added to the butene.

-) <u>Ammoniation</u>

<u />

In this reaction, we have the addition of the ammonium ion (NH_4^+). In the example, the ammonium ion is added to an acid.

-) <u>Oxidation and reduction</u>

<u />

In this reaction, we have opposite reactions. The oxidation is the loss of electrons and the reduction is the gain of electrons. For example:

Ag^+~+~e^-~->~Ag Reduction

Al~->~Al^+^3~+~3e^- Oxidation

3 0
3 years ago
Propane fuel (C3H8) is burned with 30 percent excess air. Determine the mole fractions of each of the products. Also, calculate
elena-14-01-66 [18.8K]

Answer:mole fraction of carbon dioxide = 0.429;  

mole fraction of water= 0.571

Mass of water in the products = 1.635g

Explanation:

The process of burning an hydrocarbon(example:propane) in air is called combustion. This reactions yields carbon dioxide, water and heat. With this information, we can generate a balanced equation of reaction as below:

C₃H₈ + 5O₂ ↔ 3CO₂ + 4H₂O

Note that there is 30% excess air. This means that there is enough oxgen to burn all the propane available. Thus it is a complete combustion process.

Mole fraction = number of moles/ total number of moles of the solution

Number of moles of C0₂= 3

Number of moles of H₂O= 4

Mole fraction of CO₂= 3/3+4= 3/7= 0.429

Mole fraction of H₂O= 4/3+4=4/7= 0.571

To calculate the mass of water in the products

Molar mass of C₃H₈= (3*12.011)+ (8*15.999)=44.067g

1mole of C₃H₈= 44.067g

using a unit mass of the fuel(propane)= 1g,

Therefore 1g of C₃H₈= 1/44.067= 0.02269moles

Looking at the equation of reaction, 1mole of C₃H₈ yields 4moles of water,

Therefore 0.02269moles of C₃H₈ will yield:

0.02269*4= 1.635g of H₂O

6 0
4 years ago
Other questions:
  • Which of the following contains the smallest amount of matter? 30 g 3,000 cg 30 dg 0.30 kg
    7·2 answers
  • Fuels cell automobiles use__ gas as a fuel
    8·2 answers
  • What is the term for a group of atoms held together by covalent bonds and having an overall positive or negative charge?
    7·2 answers
  • In a science experiment, Which is the variable that the scientists are measuring or testing?
    12·1 answer
  • PLEASE PLEASE HELP!! A pipe drips at 155mL/day- convert this rate to gallons/day (1gal=3.785L)
    9·1 answer
  • I know the correct answer is either a or d. Can anyone explain which one it is and why? CH3C ≡ CCH2CH2Cl is named: a. 1-chloro-3
    15·1 answer
  • Potassium superoxide is a yellow paramagnetic solid that reacts with water according to the following balanced equation. Calcula
    9·1 answer
  • What amount if force need to be applied to a 20 kg bowling ball to give it an acceleration of 5m/s
    10·1 answer
  • Which formula represents a hydrocarbon with a double covalent bond?
    10·1 answer
  • Identify the force used on your arm when you walk a dog on a leash and it tries to chase something.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!