At STP, which of these substances is most soluble in H2O?(1) CCl4 (3) HCl
(2) CO2 (4) N2
Answers
Answer: Option (3) is the correct answer.
Explanation:
It is known that like dissolves like that is, a polar solvent will dissolve only polar compounds. Whereas a non-polar solvent will dissolve only non-polar compound.
Substances whose atoms have large difference in electronegativities are polar in nature. Water is a polar solvent and it is able to dissolve polar molecules.
For example, HCl is a polar or ionic compound so it is soluble in water.
On the other hand, ,
, and
are all non-polar as bond between them is formed due to sharing of electrons.
Hence, we can conclude that at STP, HCl is the substance that is most soluble in .
Related Questions
Pentane, C5H12, will react as shown below:____C5H12(l) + ____O2 --- ______CO2 +_______ H2OH20(g)1. Balance the equation above by putting coefficients into each blank space.1C5H12+ 8O2----- 5CO2+ 6 H2O (this is what I got)2. How many atoms of oxygen are in 144 grams of pentane?step 1: 144g of C5H12*(1mole/72.17)= 1.995moles of C5H12step 2: 1.995moles of C5H12*(8moles of O2/1mole of C5H12)= 15.962 moles of O2step 3: 15.962 moles of O2*(6.02*10^23 atoms of O2/1mole of O2)= 9.609*10^24 atoms of O2 (I don't know if I did this right)3. How many atoms of oxygen are in 192 grams of carbon dioxide gas?step 1: 192 grams of CO2 *(1mole of CO2/44.01grams of CO2)= 4.363 moles of CO2step two: 4.36moles of CO2* ( 1 mole of O2/1mole of CO2)= step 3: 4.363* (6.02*10^23) = 2.627*10^24 atoms of O2 (I don't know if this is correct.4. A) CIRCLE ONE: True or False:reactant you begin with fewer grams of is your limiting reactant.B) If 32 g of oxygen gas and 32 g of pentane are combined, how much water will be produced, in moles? (Use your reaction from the top of the first page)NEED HELP ASAP THANK YOU!!!
When a nucleus of ^235 U undergoes fission, it breaks into two smaller, more tightly bound fragments.1) Calculate the binding energy per nucleon for ^235U? (Express with appropriate units)2) Calculate the binding energy per nucleon for the fission product ^137 Cs? (Express in appropriate units)
Fe2O3 is the major component in rust. How many atoms are in one molecule of rust? A. 1 B. 2 C. 3 D. 5
Arrange the following elements in order of increasing atomic radius : Rb , K , Na , Li
Answers
A₀=the initial amount of sample
A(t)=the amount of sample after t years
t=time
k=rate constant
First you need to solve for the rate constant (k) to get the equation
-((lnA(t)-lnA(0))/t=k which can simplify into k=-ln(A(t)/A₀)/t which can then be simplified further to ln(A₀/A(t))/t=k. I think the half life of strontium-90 is 28.8 years which means that when t=28.8 years, A(t) is going to equal 1/2 of A₀ and you can make the equation k=ln2/28.8 to get k=0.02408.
Now you need to solve for A(t) in the equation ln(A(t))=-kt+lnA₀ to get A(t)=e^(-kt+lnA₀) which simplifies to A(t)=A₀e^-kt. When you plug t=87, A₀=5g, and k=0.02408 into that equation you should get 0.616g.
Therefore after 87 years you will have 0.616g of strontium-90 if you started with a 5g sample.
I hope this helps. Let me know in the comments if anything is unclear.
4.00 cm x 4.00 cm, calculate the third dimension of the block.
Answers
Answer:
y = 2.77 cm
Answer: The third dimension is 2.77 cm
Final answer:
The question deals with density in physics, specifically regarding the densest metal, osmium. The dimensions of an osmium block are partially given, and the task is to find the third dimension. However, without the mass of the block, it is impossible to give a complete solution.
Explanation:
The subject of the question involves understanding the concept of density, which is the mass of an object divided by its volume. The density of osmium is given as 22.57 g/cm³. The student is also given the dimensions of the osmium block, which forms a rectangular prism with known length and width (4.00 cm x 4.00 cm), but unknown height. D = m/v or v = m/D can be used to find the third dimension of the block (height).
However, to use this formula to get a complete solution, the mass of the block must be known, which is not provided in the question. Without this crucial information, we can't solve this problem correctly.
Learn more about Density here:
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(2) lose electrons and have an increase in oxidation number
(3) gain electrons and have a decrease in oxidation number
(4) gain electrons and have an increase in oxidation number
Answers
redox reactions deal with the transfer of electrons from one species to another species
redox reactions are made of reduction reactions and oxidation reactions
reduction reactions are when electrons take in electrons and results in a decrease in the oxidation number
oxidation reactions are when electrons give out electrons resulting in an increase in the oxidation number
therefore correct answer for reduction reactions are
(3) gain electrons and have a decrease in oxidation number
Answers
I'm Osei George the answer is interference
Answer:deferehug
Explanation:
B. In a chemical change, a substance changes its phase
C. In a chemical change, the molecular structure of a substance changes
D. In a chemical change, one substance dissolves into another
Answers
Answer : The correct option is C.
Explanation :
Chemical change : It is defined as a change in which a new compounds are formed by the chemical reaction. Changes occurs in their chemical composition and properties.
The molecular structure of a substance changes in a chemical reaction is a chemical change.
- Change in molecular structure means that there is a breaking and formation of bonds in a molecule.
The example of chemical change in terms of change in molecular structure is the reaction of hydrogen with oxygen.
The reaction of hydrogen with oxygen is,
In this reaction, the H-H bond is break and O-H bond is form.
Answers
Chemists have identified 118 elements. These elements have been organized by their size and property into a chart called the periodic table. All matter is created from these elements which include solid, liquid, and gas. Some elements naturally combine into compounds.