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
timofeeve [1]
2 years ago
10

Please help ASAP Will give brainliest

Chemistry
1 answer:
Leni [432]2 years ago
8 0

Answer:  457.8

Explanation:

345.8*225/703.55

You might be interested in
Which of the examples below is a chemical agent? Select one:
Sergeu [11.5K]
Chlorine, Anthax is a biological agent, and uranium is a radioactive agent, and dynamite is just a no. Chlorine is a chemical gas.
6 0
3 years ago
What other product occurs when ac-222 releases an alpha particle?
irga5000 [103]
There is fr-218

hope this did the job, have a nice rest of your day!!

3 0
3 years ago
An unknown compound contains only C , H , and O . Combustion of 4.20 g of this compound produced 10.3 g CO 2 and 4.20 g H 2 O .
vodomira [7]

Answer:

C4H8O

Explanation:

We can get the answer through calculations as follows.

From the mass of carbon iv oxide produced, we can get the number of moles of carbon produced. We first divide the mass by the molar mass of carbon iv oxide. The molar mass of carbon iv oxide is 44g/mol

The number of moles of carbon iv oxide is 10.3/44 = 0.2341

Since there is only one carbon atom in CO2, the number of moles of carbon is same as above

The mass of carbon in the compound is simply the number of moles multiplied by the atomic mass unit. The atomic mass unit of carbon is 12. The mass of carbon in the compound is thus 12 * 0.2341= 2.8091

From the number of moles of water, we can get the number of moles of hydrogen. To get the number of moles of water, we need to divide the mass of water by its molar mass. Its molar mass is 18g/mol. The number of moles here is thus 4.2/18 = 0.2333

But there are 2 atoms of hydrogen in 1 mole of water and thus, the number of moles of hydrogen is 2 * 0.2333 = 0.4667 moles

The mass of hydrogen is thus 0.4667* 1 = 0.4667

The mass of oxygen equals the mass of the compound minus that of hydrogen and that of carbon.

= 4.2 - 0.4667 - 2.8091 = 0.9242

The number of moles of oxygen is the mass of oxygen divided by its atomic mass unit.

That equals 0.9242/16 = 0.0577625 moles

The empirical formula can be obtained by dividing the number of moles of each by the smallest which is that of oxygen

H = 0.4667/0.0577625 = 8

O = 0.0577625/0.0577625 = 1

C = 0.2341/0.0577625 = 4

The empirical formula is thus C4H8O

5 0
3 years ago
Based on the information provided here, crude oil is:
Vikentia [17]

Answer: option C, a mixture

Explanation:

Crude oil is a mixture of hydrocarbons and different organic materials. It is refined into useful materials like petrol,diesel and various petrochemicals.

8 0
3 years ago
Read 2 more answers
A gram of gold has the same _____ as a kilogram of gold.
aivan3 [116]
I believe it is density but i'm not for certain try looking it up somewhere else
5 0
3 years ago
Other questions:
  • how do the properties of compounds compare to the properties of the elements from which they are composed
    13·1 answer
  • Consider the reversible reaction.
    11·1 answer
  • What is the difference between electron configuration and valence electron configuration?
    14·1 answer
  • What goes in the blank?
    7·1 answer
  • How can endothermic and exothermic reactions help others (society)
    9·1 answer
  • What is 25 m rounded to one significant figure
    14·2 answers
  • Three mixtures were prepared from three very narrow molar mass distribution polystyrene samples with molar masses of 10,000, 30,
    14·1 answer
  • Which element does not like to bond with other atoms?
    6·2 answers
  • Which of these options is the odd one out?<br>Molecule <br>Atom<br>Compound<br>Mixture​
    15·1 answer
  • I need help w this..
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!