What is the difference between a solid piece of armor and a liquid pool of armor metal?

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Which base is the strongest for the given [H+]? 10-9 10-11 10-10 10-12

Answers

Answer:The strongest base with $H^+]$ concentration is $[H^+]=10^(-12) M$ .

Explanation:

$pH=-\log[H^+]$

Higher the pH value less will be the concentration of $[H^+]$ ion concentration and stronger will be the base.

1. $[H^+]=10^(-9) M$

$pH=-\log[10^(-9)]=9$

2. $[H^+]=10^(-11) M$

$pH=-\log[10^(-11)]=11$

3. $[H^+]=10^(-10) M$

$pH=-\log[10^(-10)]=10$

4. $[H^+]=10^(-12) M$

$pH=-\log[10^(-12)]=12$

The strongest base with $H^+$ concentration is $[H^+]=10^(-12) M$ .

The answer is 10-12. The relationship of pH and [H+] is pH = -lg[H+]. And the higher pH, the stronger base is. So the strongest base has the lowest concentration of H+.

Doubling the number of particles of gas in an inflated tire will double the pressure of the gas in the tire.a. True
b. False

Answers

True - more particles will be able to hit off the tire wall, therefore higher pressure

True, I got it right on the test

List three possible results of a double replacement reaction

Answers

1. two compounds form
2. precipitate forms
3. ions exchanged between the two reactants

An analysis of an oxide of nitrogen with a molecular weight of 92.02 amu gave 69.57% oxygen and 30.43% nitrogen. What are the empirical and molecular formulas for this nitrogen oxide? Complete and balance the equation for its formation from the elements nitrogen and oxygen.

Answers

The empirical formula is No2 and molecular formula is N2O4

empirical formula calculation

find the moles of each reactant

=% composition/molar mass

molar mass of oxygen=16 g/mol ,while hat of nitrogen= 14 g/mol from periodic table

moles is therefore=

nitrogen= 30.43/14=2.174 moles

oxygen= 69.57/1 6=4.348 moles

find the mole ratio by dividing each moles with smallest number of mole( 2.174)

nitrogen = 2.174/2.174= 1

oxygen = 4.348/2.174=2

The balanced equation for its formation from the element nitrogen and oxygen is as below

N2 +2 O2 → N2O4

therefore the empirical formula= NO2

molecular formula calculation

[NO2] n= 92.02 amu

[(14) + (16x2)]n = 92.02 amu

46n= 92.02

divide both side by 46

n=2

therefore the molecular formula is gotten by multiplying the empirical formula by 2= [NO2]2= N2O4

Which of the following is a heterogeneous mixture?A. Oil and Vinegar
B. Air
C. Milk
D. Vinegar in water

Answers

Answer:

Explanation:

b/c air is not seen by eye

Select the correct answer. Which statement describes the acid found in vinegar (acetic acid)? A. It tastes bitter. B. It feels slippery. C. It changes red litmus paper to blue. D. It reacts with Mg to produce H2. E. It releases OH- in a solution.

Answers

Answer: Option (D) is the correct answer.

Explanation:

The acetic acid, $(CH_(3)COOH)$ present in vinegar reacts wit magnesium and therefore, it releases hydrogen gas and magnesium acetate.

The chemical reaction will be as follows.

$2CH_(3)COOH + 2Mg \rightarrow 2Mg(CH_(3)COO) + H_(2)$

An acid is a substance which has pH less than 7 and changes blue litmus red. Acids taste sour as they are acidic in nature and releases hydrogen ions.

Whereas bases have pH greater than 7 and changes red litmus into blue.Bases taste bitter and releases hydroxide ions.

Thus, we can conclude that the statement it reacts with Mg to produce $H_(2)$ best describes the acid found in vinegar (acetic acid).

Answer:

D. It reacts with Mg to produce H2.

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