Which is the best tool to find the volume of the base that she needs to neutralize the acid
Answers
Given:
12.0 M HCl
2.0 liters of a 3.0 M HCl
Required:
volume of concentrated hydrochloric acid
Solution:
M1V1 = M2V2
(12.0 M HCl)V1 = (3.0 M HCl)( 2.0 liters)
V1 = (3.0 M HCl)( 2.0 liters)/ (12.0 M HCl)
V1 = 0.5 liters
Related Questions
While testing amylase activity, John uses a buffer of pH 6 and substrate starch. He incubates them at 104ºF (40ºC). All the tubes show glucose formation, except one, which had no starch solution. Why did this happen?A) the optimum pH for enzyme amylase is not pH 6B) the optimum temputure for the enzyme amylase is not 104. F (40.)C) the substrate for amylase, starch, is not present
What is the molar mass of (NH₄)₃PO₄ in g/mol? A) 149.10 g/mol B) 113.01 g/mol C) 141.03 g/mol D) 61.99 g/mol
Polar winds are usually from the________ direction.
A scientist observes that after mixing a solid powder into water, the pH of the newly formed solution is 2.7. What can he infer from this observation?The solution contains an indicator that has a pH of 2.7. The solid powder contained hydrogen ions. The pH indicator was used incorrectly. The powder increased the hydrogen ion concentration of the solution.
Answers
Answer:Concentration is a measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.
Explanation:
b. Operating system
c. Random access memory
d. Monitor
Answers
Answer:
the answer is b and this how i know
Explanation:
i know that the answer is b because i just did this hope this helps tell me if its wrong it shouldnt be tho
Answers
1 Cu + 2 AgNO₃ -> 1 Cu (NO₃)₂ +2 Ag
63,546 -------- 2 * 169.87
? g Cu ------- 45.0
Mass ( Cu ) = 45.0 * 63,546 / 2 * 169.87
Mass ( Cu ) = 2859,57 / 339,74
Mass = 8.4169 g of Cu
hope this helps!
full valence shells
when they have satisfied the octet rule naturally or through bonding to obtain full valence shells
when their valence electrons have "fallen" back to ground state through bonding
Answers
Answer:
when they have satisfied the octet rule naturally or through bonding to obtain full valence shells
Explanation:
Generally, most atoms of an element are unstable because they have a void in their electron shell to fill, hence, they need to react with other elements to fulfil this task of octet.
Octet rule states that atoms of elements engage in reactions to form compounds so they can have eight (8) valence electrons in their shell. Noble gases e.g argon, neon etc. are elements that have naturally satisfied this octet rule by possession of 8 valence electrons in their shell. Other elements that do not have this naturally becomes reactive and enter bonding with other atoms to obtain full valence shells.
insoluble because most Na+1 compounds are insoluble in water
soluble because all S−2 compounds are soluble in water
insoluble because there are no water soluble S−2 compounds
Answers
Answer: Option (a) is the correct answer.
Explanation:
Atomic number of sodium is 11 and its electronic distribution is 2, 8, 1. Whereas atomic number of sulfur is 16 and its electronic distribution is 2, 8, 6.
So, when both sodium and sulfur chemically combine together then it results in the formation of an ionic bond due to transfer of an electron from sodium to sulfur atom.
Sodium changes into by losing an electron and sulfur changes into
by gain of two electrons from two sodium atoms.
As it is known that water is a polar solvent and all ionic substances will dissolve in water.
Therefore, we can conclude that when the compound, , is mixed with water, the
is soluble because all
compounds are soluble in water.
When the compound, Na2S, is mixed with water, the Na2S is soluble because all Na+1 compounds are soluble in water. The rest of the choices do not answer the question above.
Answers
The answer is: A) Yes, because the question is specific.
The scientific method is a process for experimentation that is used to explore observations (in this example color of snowshoe hares).
Steps of the scientific method:
1) ask a question about something that is observed.
2) do background research.
3) construct a hypothesis, an attempt to answer questions with an explanation that can be tested.
4) test of hypothesis.
5) analyze collected data and draw a conclusion.
The two main variables in an experiment are the independent and dependent variable.
Dependent variable is the variable being tested and measured in a scientific experiment, in this example lifespan of snowshoe hares.
Dependent variables depend on the values of independent variables. The dependent variables represent the output or outcome whose variation is being studied.