Solution 1
Solution 2
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Answer:
Answer is B
Explanation:
2. If 3 molecules of iron react, then 4 molecules of water are needed (coefficients).
3. The mole ratio of iron to water is 3:4 (coefficients).
4. If 3 molecules of iron react, then 4 molecules of H2 are produced, and therefore are involved in the reaction (coefficients).
that is
= 2C4H6 + 11O2 = 8 CO2 + 6H2O
C4H6 reacted with oxygen (O2 )through the process of combustion to form carbon iv oxide (CO2) and water (H2O) . 11 infront of O2 is to make sure the molecules of O2 is balanced in both reactant side and the product side
In current context, hydrogen bonding exist if hydrogen atom in a molecule is attached to electronegative elements like O, F or N. Classic example of the system exhibiting hydrogen bonding is pure water. In pure water, water molecules are held together by hydrogen bonding.
Answer:
Phosphate group.
Explanation:
One of the form of lipids is triglycerides.
Triglycerides are the lipids which have one glycerol molecule bonded with three fatty acid chains, so it is a triester of glycerol hence known as triglycerides.
In case of phospholipids also there is a glycerol molecule to which two fatty acids are bonded and in place of third fatty acid it has a phosphate group which makes it different from other lipids or triglycerides.
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That was for the character limit thing!
Answer:
Geiger counter and scintillation counter
Explanation:
The Geiger counter was invented by Hans Geiger in 1908 to measure the levels of radiation in bodies and the environment, so it is one of the indispensable equipment for the inspector to detect radiation leaks in a nuclear power plant. It contains a tube with argon, which ionizes by being crossed by alpha and beta particles of radiation, closing the electric circuit and triggering the counter.
Similarly, a scintillation detector is an apparatus used to detect ionizing radiation. When something in the environment has been reached by radiation, this detector emits a small ray of light, indicating the radiation contamination.
Answer:
A. Geiger counter and scintillation counter
Explanation:
Answer: Option (a) is the correct answer.
Explanation:
Rate of reaction is defined as the rate at which a chemical reaction occurs. That is, it tells how rapidly or slowly the products are formed.
Mathematically, Rate =
It also tells the number of successful collisions taking place.
Thus, we can conclude that the speed at which products form is measured by the reaction rate.
find the moles of O2 used = mass/molar mass
= 40 g/32g/mol = 1.25 moles
write the reacting equation
4Na+ O2 = 2Na2O
by use of mole ratio between Na to O2 which is 4 :1
the moles of Na = 1.25 x 4 = 5 moles
mass of Na = mass x molar mass
= 5 moles x 23 g /mol= 115 moles