The combustion of a hydrocarbon X (30 cm3) with 350 cm3 of oxygen at STP resulted in the formation of 440 cm3 of gaseous products. The volume of gases was reduced to 360 cm3 when the excess O2 was removed and then reduced by half when bubbled through NaOH.

QUESTION POSTED AT 14/02/2020 - 12:43 PM

Related questions

Classify this statement as always true, AT; sometimes true, ST; or never true, NT. To obtain a value for the number of moles using the ideal gas law, one uses the conditions of STP.

AT, STP in chemistry is the abbreviation for Standard Temperature and Pressure. STP most commonly is used when performing calculations on gases, such as gas density

ANSWERED AT 28/02/2020 - 05:11 PM


QUESTION POSTED AT 28/02/2020 - 05:11 PM

Which piece of equipment would be most useful for measuring the volume of some water?

A graduated cylinder. :)

ANSWERED AT 28/02/2020 - 05:00 PM


QUESTION POSTED AT 28/02/2020 - 05:00 PM

Acid mine drainage is formed when water flows past exposed rocks that leach out ______________________ that react with water and oxygen to form

Acid mine drainage is formed when water flows past exposed rocks that leaches out sulfates that react with water and oxygen to form. Sulfate is the answer which means that a salt or it is sulfuric acid. This polyatomic anion is part of our everyday life.

ANSWERED AT 28/02/2020 - 04:42 PM


QUESTION POSTED AT 28/02/2020 - 04:42 PM

At what temperature is the average speed of oxygen molecules equal to 1.12×104m/s?

 we will use the root mean squared speed of oxygen formula
v= (3RT) / M
T= vM/3R
where
v =1.12x104 m/s; velocity
R=  (8.31447 kg m2 s-2 K-1 mol-1) gas constant

M = 0.0319988 kg/mol; molar mass of oxygen

substituting the given values, we will get 

T(K)= 14.37K or -258.78 C

Oxygen molecules speed of 1.12x104 m/s is at temperature -258.78C.



ANSWERED AT 28/02/2020 - 04:33 PM


QUESTION POSTED AT 28/02/2020 - 04:33 PM

A sample of hydrogen has an initial temperature of 50.° c. when the temperature is lowered to -5.0° c, the volume of hydrogen becomes 212 cm3 . what was the initial volume of the hydrogen in dm3?

Using the 
V1/T1=V2/T2
where
T1=50C= 323.15K
T2= -5C=268.15 K
V2= 212m^3
substitute the given values, we will get the initial volume
V1=V2T1/T2
V1= 255.48m^3

The initial volume is 255.48m^3




ANSWERED AT 28/02/2020 - 04:31 PM


QUESTION POSTED AT 28/02/2020 - 04:31 PM

The solubility product constant for mg(oh2(s is 1.2x10^-11 calculate solubility of magnesium hydroxide in mol/l

27,632 would be the answer

ANSWERED AT 28/02/2020 - 04:29 PM


QUESTION POSTED AT 28/02/2020 - 04:29 PM

What is the chemical symbol for nitrogen and oxygen?

N2 and O2

hope it helps

ANSWERED AT 28/02/2020 - 04:26 PM


QUESTION POSTED AT 28/02/2020 - 04:26 PM

When you use the claw of a hammer to remove a nail , what type of simple machine are you using

You'd be using a wedge.

ANSWERED AT 28/02/2020 - 03:29 PM


QUESTION POSTED AT 28/02/2020 - 03:29 PM

What is relief and how does it affect soil formation

S is for soil,cl (sometimes c) represents climate,o organisms including humans,r relief,p parent material, or lithology, andt time.

ANSWERED AT 28/02/2020 - 03:24 PM


QUESTION POSTED AT 28/02/2020 - 03:24 PM

Classify this chemical equation as a combination/synthesis , decomposition, single replacement, double replacement, or combustion. Pb(s) + Hg2SO4(s) --> PbSO4(s) +2 Hg(l)

S is for soil,cl (sometimes c) represents climate,o organisms including humans,r relief,p parent material, or lithology, andt time.

ANSWERED AT 28/02/2020 - 03:10 PM


QUESTION POSTED AT 28/02/2020 - 03:10 PM

What is the amount of product that you get when you perform an experiment called

It's called a reactant.

ANSWERED AT 28/02/2020 - 03:04 PM


QUESTION POSTED AT 28/02/2020 - 03:04 PM

It is necessary for a scientist to communicate her procedures results and explanation so the other scientists can repeat them vestigation check the work for errors understand investigation all of these

Yes of course! Scientists need to communicate clearly, else no one would understand each other. Hope this helped. :D
Best Regards, 
-RussianChicken

ANSWERED AT 28/02/2020 - 02:45 PM


QUESTION POSTED AT 28/02/2020 - 02:45 PM

How manyy grams of h2 are needed to react with 20 grams of o2. please show work

Would it be 10, you know 1h for every 2o, H2O


ANSWERED AT 28/02/2020 - 02:28 PM


QUESTION POSTED AT 28/02/2020 - 02:28 PM

A scuba tank has a pressure of 195 atm at a temperature of 10 degree Celsius. The volume of the tank is 350 L. How many moles of air are in the tank?

Answer:

The answer is 2939 moles.

Explanation:

To obtain the moles from these values yo should apply the ideal gas formula because in a scuba tank all gas that you have inside is air:

PV= nRT. (1)

Thus the moles number, n, is:

n = PV/ RT (2)

Where:

P is pressure: 195 atm;

V is volume: 350 L,

R is gas constant: 0,082 atm×L / mol×K

And T is temperature: 10°C, that must be converted in k, thus:

10°C + 273,15 = 283,15 K

Replacing these values in (2) the moles number, n, is:

2939 moles of air

ANSWERED AT 28/02/2020 - 02:08 PM


QUESTION POSTED AT 28/02/2020 - 02:08 PM

Causes rocks to change composite when reacting with oxygen

The steel in nail contains iron. Oxygen and water react with the iron to form rust. (oxidation i believe. i may be wrong) 
Minerals in rocks undergo chemical changes when they react with water and air. is the breakdown of rocks by chemical reactions that change the rocks' makeup, or composition.

ANSWERED AT 28/02/2020 - 01:29 PM


QUESTION POSTED AT 28/02/2020 - 01:29 PM

Volume is a measurement of how fast particles of a substance are moving. true or false.

Answer:  The answer is False.

Explanation:  Volume is defined as the whole space covered or occupied by the object.

It has an SI unit of meter cube (m3).

Thus kinetic energy is the measurement of how fast particles of a substance are moving.

ANSWERED AT 28/02/2020 - 01:25 PM


QUESTION POSTED AT 28/02/2020 - 01:25 PM

How many grams of oxygen gas must react to give 2.10g of ZnO?

The chemical reaction is written as:

2Zn + O2 = 2ZnO

We are given the amount of the product to be produced from the reaction. We use this value and the relation of the substances in the reaction to calculate what is asked. We do as follows:

2.10 g ZnO ( 1 mol / 81.408 g ) ( 1  mol O2 / 2 mol ZnO ) ( 32 g / 1 mol ) = 0.414 g O2 is needed

ANSWERED AT 28/02/2020 - 12:46 PM


QUESTION POSTED AT 28/02/2020 - 12:46 PM

What were the three popular explanations for the moon's formation

The Earth was rotating very quickly when it was first formed, (about the same age as the conditions for the first theory,) and the Moon spun off the Earth due to .... There are three different kinds of rocks, depending on how they were formed. does this help?

ANSWERED AT 28/02/2020 - 12:25 PM


QUESTION POSTED AT 28/02/2020 - 12:25 PM

How many moles of oxygen are required to produce 37.15 g CO2? 37.15 g CO2 =_______ mol O2

As you have stated, the chemical equation for the reaction of plentiful oxygen with propane is:
C3H8 + 5O2 → 3CO2 + 4H2O
Therefore the molar ratio of oxygen to CO2 is 5:3. The moles of CO2 produced can be calculated using the equation:
moles = mass/RMM = 37.15 g / 44.0 g/mol = 0.844 mol
For every one mole of CO2 produced, 5/3 moles of O2 are consumed, therefore the moles of O2 required is:
0.844 mol * (5/3) = 1.41 mol
Hope this helps!

ANSWERED AT 28/02/2020 - 11:47 AM


QUESTION POSTED AT 28/02/2020 - 11:47 AM

5. In this lab, you continued to add Reagent D to each solution until it turned blue. The purpose was to remove the oxygen to measure how much was left. The more drops you had to add to acquire the blue color, the more oxygen was present in the tube. In which phase(s) did the solution turn blue before you added Reagent D? What do you think that means? NO FALSE ANSWERS

A solution is turning blue means, it is turning it's behavior to Basic from Acidic. Reagent D must be a Basic component so it is increasing the pH of the solution. As reaction does not depend on the phase of the component, it could be anything i.e., Solid, Liquid or gas.

Hope this helps!

ANSWERED AT 28/02/2020 - 11:42 AM


QUESTION POSTED AT 28/02/2020 - 11:42 AM

How fast a reactant is used up to how fast a product is formed is _____. A.)the equilibrium B.)the rate of reaction C.)solution concentration D.)the catalyst

Answer: Option (B) is the correct answer.

Explanation:

The rate of a reaction is defined as how rapidly the reactants convert into products.

There are various factors which can help in increasing the rate of a reaction like addition of a catalyst, temperature, change in concentration etc.

Thus, we can conclude that out of the given options how fast a reactant is used up to how fast a product is formed is the rate of reaction.

ANSWERED AT 28/02/2020 - 11:32 AM


QUESTION POSTED AT 28/02/2020 - 11:32 AM

A gas occupies a volume of 34.5 L at 87.5 kPa and 23.5 C. The container can expand to the volume of 45.5 L. If conditions change to 59.7 kPa and 33.6 C will the container be able to contain the resulting gas volume?

The answer is no because if you use the combined gas law the volume would come out to be 52.3 liters.

ANSWERED AT 28/02/2020 - 11:18 AM


QUESTION POSTED AT 28/02/2020 - 11:18 AM