The order of the reaction with respect to X is 2.
The statements given ;
1. As Concentration of X is in the rate law equation , changing X will have an effect on the rate of the equation.
2. Rate is proportional to X^2
So if concentration of X is doubled, then rate proportional to (2X)^2 = 4X^2
Rate therefore quadruples when X is doubled
This statement is correct
3. If we divide X/2 then the effect to the rate is (X/2)^2 = X/4 . This will reduce the rate by quarter not half . This statement is wrong.
4. If we multiply by 3
Then rate proportional to (3X)^2 = 9X^2
Rate increases by 9 times. This statement is wrong
The answer is <span>magnets.
Pseudoscience is a belief and not a scientific method. Diet, drugs, and exercise cannot be examples of pseudoscience since it is known they can improve the condition of arthritis. But, on the other side, magnets are not scientifically confirmed as useful in arthritis treatment. There is only a belief that magnets can cure arthritis. Therefore, magnets are the exaple of pseudoscience.</span>
Answer:
0.00015dm³
Explanation:
the equation gives
C + O2 — CO2
40min × 60s/1min = 2400s
0.70g/s ÷ 2400s =0.00029g
no of mole = mass/molar mass
molar mass of Co2 = 44g/mol
no of mole = 0.00029/44 = 6.59×10^-6mol
volume at STP since its a gas
1 mol — 22.4dm³
6.59×10^-6 — 22.4×6.59×10^-6/1 = 0.00015dm³
*this is the only way i could think of so am not 100% sure
Answer:
Shape
Explanation:
Two factors that determine wether a molecule is polar are the types of atoms in the molecule and the <u>shape</u> of molecule.
Shape and polarity determine which type of compounds is.
if the shape of molecule is symmetric it will non polar. And it will dissolve in non polar solvent. The polar molecules are trigonal in shape.
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion and compound is polar.
The compound having ionic bonds generally have moderate to high boiling points and melting point because of greater electrostatic interaction. Their electrical conductivity are high and these minerals tend to dissolve in water.
Covalent bond:
It is formed by the sharing of electron pair between bonded atoms.
The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive and compound will polar.
For example:
In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive.
If the ectronegativity difference is 0.4 or less than this the compound will be non polar covalent compound and will behave different from polar compound.
