Answer : First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst
Explanation : Measuring the time taken for the liquid to become clear when X and Y were mixed together will give an assumption about the reaction time and the rate of reaction.
Then same measurement should be done when the substance A is added to the liquid of X and Y mixture. If there is a fast reaction that occurs when A is added to the reaction mixture then it can be concluded that A acts as an catalyst for mixing X with Y. Also, by comparing the reaction rates of both the reaction it can be easily concluded that A was a catalyst or not.
Answer: C - Organisms return water to the environment after they use it.
Explanation: The amount of water on earth will always remain the same. Water goes in and out of all organisms. It is not possible to be more or less.
HA and HB are present in concentrations of 0.182 M and 0.153 M, respectively.
<h3>What kind of acids are monoprotic?</h3>
Monoprotic acids include benzoic acid (C6H5CO2H), acetic acid (CH3CO2H or HOAc), nitric acid (HNO3), and hydrochloric acid (HCl).
<h3>How can you tell if a substance is monoprotic?</h3>
Any acid with only one hydrogen atom in its formula is called a monoprotic acid, while some acids with multiple hydrogen atoms may also fall under this category. In other words, while all monoprotic acids contain only one hydrogen, not all single-hydrogen acids are monoprotic.
<h3>Do monoprotic acids have a low acidity?</h3>
Because it easily loses its hydrogen ion in solution, the monoprotic acid HBr is regarded as being strong.
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Cu + 2NO₃⁻ + 4H⁺ → Cu⁺² + 2NO₂ + 2H₂O this is the balanced chemical equation in acidic medium.
<h3>What is Balanced Chemical Equation ?</h3>
The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now write the given equation
Cu + NO₃⁻ → Cu⁺² + NO₂
Here we can see that all atoms other than O and H are balanced.
In the given equation oxidation number of Cu changes from 0 to +2.
In the given equation oxidation number of N changes from 5 to 4.
Now multiply by 2 with NO₃⁻ and NO₂.
Cu + 2NO₃⁻ → Cu⁺² + 2NO₂
Now ad the water molecules in right hand side to balanced the O atoms.
Cu + 2NO₃⁻ → Cu⁺² + 2NO₂ + 2H₂O
Now add 4H⁺ on the left hand side to balance the H atoms.
Cu + 2NO₃⁻ + 4H⁺ → Cu⁺² + 2NO₂ + 2H₂O
Thus from the above conclusion we can say that Cu + 2NO₃⁻ + 4H⁺ → Cu⁺² + 2NO₂ + 2H₂O this is the balanced chemical equation in acidic medium.
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Answer:
BBB millipedes have two sets of legs on each segment.
Explanation:
