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:
The answer is B
Explanation:
Just did the test and got it right
3.28 x 10³ mol of water has a mass of 59.1156 kg. This is the accurate answer to the given question.
We can use the molar mass of water, which is 18.02 g/mol, to calculate the mass of 3.28 x 10³ moles of H2O. The following equation can be used to translate the quantity of moles into grams:
mass is determined by multiplying the number of moles by the molar mass.
Inputting the values provided yields:
18.02 g/mol times 3.28 x 10 3 moles of mass equals 59,115.6 g.
Lastly, by dividing by 1000, we can change the mass from grams to kilograms:
mass is 59,115.6 grams per kilogram (59.1156 kg).
As a result, 3.28 x 10³ moles of H2O have a mass of 59.1156 kg.
To learn more about moles visit:
#SPJ1
The symbol of an isotope that atom of its element contains 50 electrons and 70 neutrons is Tin (Sn).
The Isotope may be characterized as one of two or more types of atoms of a chemical element that significantly have the same number of protons but with different numbers of neutrons and therefore different atomic masses.
In a more simple sense, an isotope may be defined as an atom that has the same atomic number but different atomic mass and physical properties.
According to the question,
The number of electrons an atom possesses = 50.
The number of neutrons = 70.
Since, the number of electrons = the number of protons = the atomic mass of an atom = 50.
∴ According to the periodic table, an element having an atomic number of 50 is known as Tin (Sn).
Its atomic mass = the number of protons + the number of neutrons.
= 50 + 70 = 120 amu.
Therefore, the symbol of an isotope that the atom of its element contains 50 electrons and 70 neutrons is Tin (Sn).
To learn more about Isotopes, refer to the link:
#SPJ2
b. The different kinds of compounds included within the chemical formula
c. The types of molecules present in a formula
d. The correct amounts of substances to mix together to make a formula