What’s the independent and dependent variable?
Answers
Answer:
independent variable: a variable (often denoted by x ) whose variation does not depend on that of another.
dependent variable: a variable (often denoted by y ) whose value depends on that of another.
Explanation:
Related Questions
Stoichiometry problems which give a known amount of one reactant and solve for an amount of product frequently state that there is "an excess" or "plenty" of the reactant(s) not given. (For example, in the equation 2Na + 2H2O → 2NaOH + H2, how many grams of sodium hydroxide are produced from 3.0 mol of sodium with an excess of water?) Why is it necessary to know that there is an excess of these reactant(s)?
A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following solutions?0.0800 M Na2CO3 0.100 M NaCl 0.0750 M Na3PO4 0.0500 M NaOH
In the chemical equation Zn + 2HCl ZnCl2 + H2, the reactants are A. zinc and hydrochloric acid. B. zinc and hydrogen carbonate. C. zinc chloride and hydrogen. D. zinc chlorate and water.
How many moles of copper are formed when 3.8 moles of zinc are mixed with copper (II) sulfate?
Answers
Answer: The water is highly corrosive when the saturation index < - 0.5 and
> 0.5
Explanation:
If the saturation index for a pool measures the balance between the acid level and the amount of minerals in pool water. Considering its balanced water has an index value of 0.
The water is highly corrosive when the saturation index < - 0.5 and
> 0.5
The attachment below shows the calculations.
2H2O yields 2H2 + O2
H2 + Cl2 yields 2HCl
2Li + CaO yields Li2O + Ca
CH4 + 2O2 yields CO2 + 2H2O
Answers
H2+Cl2 yields 2HCl could be the answer, as it starts with 2 reactants and ends with one product, something found in synthesis reactions.
The third answer is incorrect because even though there are no decompositions of single products, the metal exchanges positions, something that only occurs in decomposition reactions.
In the fourth answer is also incorrect because the methane is oxidized. This only happens in decomposition reactions.
The correct answer, then, is B.
Answers
1 mole ------------------ 159.69 g
0.7891 moles ---------- ? g
mass = 0.7891 x 159.69 / 1
= 126.01 g
hope this helps!
a strong acid and a weak acid.
a strong base and a weak base.
an acid and water.
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The right answer is A (strong acid with strong base).
The reaction of an acid with a base to produce salt and water alone is called a neutralization reaction.
A salt is a compound formed following a replacement of the hydrogen ions (H +) of an acid with a basic radical during a reaction.
A normal salt is formed by the complete replacement of the H + of an acid (example Na2CO3).
while an acidic salt is formed by the incomplete replacement of the H + of an acid (eg NaHCO3).
(2) homogeneous mixture
(3) heterogeneous compound
(4) heterogeneous mixture
Answers
Dilute, aqueous potassium nitrate solution is best classified as a:
(2) homogeneous mixture
Explanation:
A homogeneous mixture may be a solid, liquid, or volatilized mixture that has a similar proportions of its parts throughout any given sample.
Conversely, a heterogeneous mixture has parts whose proportions vary throughout the sample.
Because it's a combination of water and nitrate and you cannot clearly see the separation within the mixture .
A dilute, aqueous potassium nitrate solution is classified as a homogeneous mixture due to its uniform composition and properties
A dilute, aqueous potassium nitrate solution is best classified as a homogeneous mixture. By definition, a homogeneous mixture is a mixture which has uniform composition and properties throughout. For instance, when potassium nitrate is dissolved in water, it spreads evenly throughout the solution, creating a consistent composition from one drop of solution to the next. Therefore, it's not a compound (homogeneous or heterogeneous) because it doesn't consist of two or more elements chemically bonded together, and it's not a heterogeneous mixture because its composition isn't varied or unequal.
Learn more about Homogeneous Mixture here:
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b. exothermic.
c. oxidation.
d. endothermic
Answers
Reason : - Reactions in which energy is absorbed are called endothermic reactions. In your provided question, 150 kcal energy is being absorbed, and thus, we can say that it is an endothermic reaction.