what is the molarity of a solution in which 65.3 NaNO3, are disssolved in enough water to make 1250 mL of solution?

Answers

Answer 1

Answer:

1242

Explanation:


Related Questions

What is the hydroxide ion concentration of an aqueous solution with a ph of 3. 45

Answers

the solution is an alkali

The hydroxide ion concentration of an aqueous solution with a ph of 3. 45 is  10⁻³·⁴⁵

What is pH?

PH is potential hydrogen. It helps in to determine the acidity and basicity of any solution.

To get the hydroxide ion concentration of an aqueous solution, the following formula will be used.

[tex]pH = -log^[^H^+^]\\pH=-log^[^H^3^O^+^]\\\\-log [^H^3^O^+^] - pH\\ 10 ^-pH = [H3O^+] \\\\H3O^+ = 10^-^3^.^4^5[/tex]

Thus, the hydroxide ion concentration is 10⁻³·⁴⁵

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Round the mmHg readings to the nearest whole number. Round the kPa readings to the nearest tenth. Round the atm readings to the nearest hundredth. Convert a pressure of 1.76 atm to _____ torr.

Answers

i love jesus and i love my mommy

Zinc reacts with iron (iii) chloride yielding zinc chloride plus iron

Answers

Answer:

I don't see a specific question, so I'll make a few comments and hope that answers the reason for the post.

Explanation:

Zinc(Zn) does react with iron chloride, since zinc is a more reactive metal than the iron.

When Zn is introduced to an iron (III) chloride solution, the Zn disoplaces the Fe atom in a displacement reaction.

The chemical equation of the reaction:

Zn + Fe(III)Cl3 → ZnCl3 + Fe

Energy is often realeased in this type of reaction, since the resulting chemical products have a lower energy that the reactants.

There are several metals more reactive than iron.  One of the more interesting examples of a highly exothermic reaction with iron chloride (rust) is the reaction of aluminum with iron chloride.  `This is highly exothermic and is labelled a thermite reaction.  It provides a spectacular flame that is not enough to weld railroad tracks together.

Consider the reaction 2NaN3 → 2Na + 3N2, which is the first reaction that occurs when an air bag expands in a car undergoing a collision. This reaction happens very quickly, as you might suspect.

A graph showing the amount of nitrogen gas (N2) could be best described as which sentence?

A.) The graph line’s general trend is decreasing from left to right.
B.) The graph line’s general trend is absolutely horizontal.
C.) The graph line’s general trend is nearly horizontal.
D.) The graph line’s general trend is increasing from left to right.

Answers

Answer:

D) The Graph line’s general trend is increasing from left to right.

Explanation:

N2, a product, will increase over time which means the line of the graph would go up over time. Time increases from left to right so the correct answer is D.

The graph that describes the reaction will have a trend in which the graph is decreasing from left to right.

What is a collision?

A collision occurs when two particle bump into each other. We know that a reaction takes place when there is an effective collision between the reacting particles.

In this case, the graph that describes the reaction will have a trend in which the graph is decreasing from left to right.

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Which shows that friction is undesirable?
a. Pushing furniture
b. Lighting a matchstick
c. Walking on wet floors
d. Approaching a spotlight

Answers

C. Walking on wet floors shows that Friction is undesirable

In a molecule of water (H2O), two hydrogen atoms are each bonded to one oxygen atom. What forms each of the two bonds?

Answers

the two bonds are formed with the help of covalent bonds

How to know if a single replacement reaction will occur

Answers

Answer:

To determine whether a given single replacement will occur, you must use an “Activity Series” table. If the metal or the halogen is above the element it will replace based on the activity series, a single displacement reaction will occur. The video below summarizes an experiment conducted to compare the activities of three metals ( Mg, Cu and Zn ).

Explanation:

Single replacement reaction will occur if any more active specie will add on the solution.

What is single displacement reaction?

Single displacement reactions are those reactions in which one element from the given molecule is displaced by some other element.

Generally displacement reactions are shown by metals when more reactive metal is added in the solution of any another metal. Then more reactive metal displaces the metal which is already present in the solution and reaction is taking place is shown by changing in color.

Hence single displacement reaction will occur when more reactive metal is added in any solution.

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A compound has a percent composition of 38.7% carbon, 9.76% hydrogen, 51.5% oxygen.
Laboratory data shows that the compound's molar mass is 62.0 g/mol. What is the
molecular formula of the compound?

Answers

The molecular formula of the compound that has a percent composition of 38.7% carbon, 9.76% hydrogen, 51.5% oxygen is C2H6O2.

How to calculate molecular formula?

The molecular formula can be calculated from the empirical formula. The empirical formula of the compound is calculated as follows:

C = 38.7% = 38.7gH = 9.76% = 9.76gO = 51.5% = 51.5g

Next, we convert the mass to moles by dividing by their atomic mass:

C = 38.7 ÷ 12 = 3.23molH = 9.76 ÷ 1 = 9.76molO = 51.5÷ 16 = 3.22mol

Next, we divide by the smallest (3.22)

C = 1H = 3O = 1

Hence, the empirical formula of the compound is CH3O

If the molar mass of the compound is 62g/mol;

(CH3O)n = 62

31n = 62

n = 2

(CH3O)2 = C2H6O2

Therefore, the molecular formula of the compound that has a percent composition of 38.7% carbon, 9.76% hydrogen, 51.5% oxygen is C2H6O2.

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correct answer is A
a detailed explaination would be appreciated

Answers

Answer:

yh correct answer is A

Explanation:

the reason is because

What is the percent composition of hydrogen in beryllium hydride, if 69.6g of beryllium with 15.6g of hydrogen to produce 85.2g of BeH2?

Answers

The percent composition of hydrogen is 18.3%.

What is percent composition?

The term percent composition refers to the percentage of a particular component in a compound. It is contained as the ratio of the mass of that component to the total mass multiplied by 100.

From the law of conservation of mass, total  mass of beryllium hydride(BeH2) =  85.2 g

Mass of hydrogen =  15.6 g

Percent composition of hydrogen =  15.6 g/ 85.2 g  × 100/1 = 18.3%

Why are flood plains desirable farm land in spite of the fact that they are prone to flooding?.

Answers

Flood plains are desirable farm land in spite of the fact that they are prone to flooding because of its high fertility.

Why are floodplains desirable farm land?

Floodplains are very fertile agricultural areas because the floods carry nutrient-rich silt and sediment and deposited it that plains. Floodplains are flat which make easier farming.

So we can conclude that flood plains are desirable farm land because of its high fertility.

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The periodic table is arranged in order by which classification?.

Answers

Answer:

Atomic weight and valence electrons

Explanation:

These variables allow Mendeleev to place each element in a certain row and column. The table comprises 7 rows and 18 columns.

Name an element in the third period (row) of the periodic table with a total of 4 3p electrons

Answers

Answer:

sulfur

Explanation:

sulfur has 4p electrons.

phosphorus has 3p electrons.

The question is asking which one has 4

The element in the third period (row) of the periodic table with a total of 4 3p electrons is sulfur (S).

What is sulfur?

Sulfur is a chemical element that is present in the third of the periodic table.

Its atomic number is 16.

The electronic configuration of sulfur is [tex]\rm [Ne]\; 3S_2\; 3P_4[/tex]

So, sulfur contains 4 electrons in its last orbital.

Thus, the element in the third period (row) of the periodic table with a total of 4 3p electrons is sulfur (S).

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Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is the
formula equation for this reaction?
+

1.F2(1) + Na(s) — NaF2(s)
2.F2(g) + Ca(s) — CaF20)
3 F2(g) + Na(s) — NaF 2(0)
4. F2(g) + Ca(s) __, CaF2(s)


Answers

Answer: B aka #2

Explanation:

The Chemical equation for this reaction is F[tex]_2[/tex](g) + Ca(s) → CaF[tex]_2[/tex]. Therefore, the correct option is option B.

Chemical equations are symbols or chemical formulas that depict a chemical reaction symbolically. With a plus sign separating the entities in the reactants and products, the reactant objects are listed on the left as well as the product objects are listed on the right.

The critical values of a stoichiometric values are shown as coefficients alongside the symbols or formulas of the various entities. Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. The formula equation for this reaction is

F[tex]_2[/tex](g) + Ca(s) → CaF[tex]_2[/tex]

Therefore, the correct option is option B.

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CH4 + 2 02 > CO2 + 2 H2O
A scientist wants to completely burn 25 L of methane.
How many molecules of oxygen will the scientist need to
complete this experiment?

Answers

Answer:

mf i was trying to

find out the same thing

Explanation:

The ph of a solution is 2. 0. Which statement is correct? useful formulas include startbracket upper h subscript 3 upper o superscript plus endbracket equals 10 superscript negative p h. , startbracket upper o upper h superscript minus endbracket equals 10 superscript negative p o h. , p h plus p o h equals 14. , and startbracket upper h subscript 3 upper o superscript plus endbracket startbracket upper o upper h superscript minus endbracket equals 10 to the negative 14 power. The poh of the solution is 12. 0. The concentration of oh– ions is 1. 0 mc021-5. Jpg 10–2 m. The concentration of upper h subscript 3 upper o superscript plus. Ions is 100. 0 m. The poh of the solution is 16. 0.

Answers

If the pH of the solution is 2.00. it follows that the pOH of the solution is 12.

What is pH?

The term pH refers to the hydrogen ion concentration of the solution. It shows the degree of acidity in the solution. We also know that the pOH can be obtained from the pH using; pOH = 14-pH.

Hence, if the pH of the solution is 2.00. it follows that the pOH of the solution is 12.

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Given the following reaction, what is the conjugate acid of ammonia?

Answers

The ammonium ion is formed when ammonia accepts a proton from an acid.

What is conjugate acid?

The term conjugate acid  refers to a specie that is formed when a base accepts a proton. The conjugate acid of ammonia is the ammonium ion.

This is because, the ammonium ion is formed when ammonia accepts a proton from an acid.

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Consider the equation for the formation of water. 2h2 o2 right arrow. 2h2o what is the theoretical yield of h2o if 130 g of h2o is produced from 18 g of h2 and an excess of o2? 18 g 81 g 130 g 160 g

Answers

The theoretical yield is the reaction yield that measures the product of the reaction from the conversion of the limiting reagent. The theoretical yield is 160 gm.

What is mass?

Mass or the theoretical yield is the result of the multiplication of mole and the molar mass of the compound.

The reaction between hydrogen and oxygen is shown as,

[tex]\rm 2H_{2} + O_{2} \rightarrow 2H_{2}O[/tex]

Moles of water is calculated as:

[tex]\begin{aligned}\rm moles &= \rm \dfrac{mass}{molar\; mass}\\\\&= \dfrac{18}{2}\\\\&= 9\;\rm moles\end{aligned}[/tex]

The theoretical yield of water is calculated as:

[tex]\begin{aligned}\rm \text{weight of water} &= \rm moles \times molar \; mass\\\\&= 9 \times 18\\\\&= 162 \;\rm gm\end{aligned}[/tex]

Therefore, option D. 160 gm is the theoretical yield of water.

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When the carbonator adds CO 2 to the solution, a ________ is added to the reaction, which pushes the reaction in the
________ direction.
a. product, forward
b. product, reverse
c. reactant, forward
d. reactant, reverse

(CO2 is added to H2CO3)

Answers

When the product is added to the solution, it will shift the reaction forward.

What is Carbonation?

Carbonation is a form of chemical reaction in which carbon dioxide is added to a solution to give carbonates, bicarbonates, and carbonic acid. In chemistry, the term is used in place of carboxylation to form carboxylic acids

When a product is added to a system, the equilibrium will shift to the left, so as to produce more reactants but if the reactants is remove from the system, equilibrium will also be shifted to the left.

Therefore, When the product is added to the solution, it will shift the reaction forward.

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The equilibrium for the reaction between (ch3)2nh a weak base

Answers

The equilibrium for the dissolution of the weak base is ;(CH3)2NH(aq) + H2O(l) ⇄ (CH3)2NH3^+(aq) + OH^-(aq)

What is a weak base?

A weak base is one that does not ionize completely in solution. As such, a weak base will have a very low base dissociation constant Kb reflecting its minimal dissociation in solution.

The question is incomplete hence we are are unable to work out the equilibrium but in solution it will look like this;

(CH3)2NH(aq) + H2O(l) ⇄ (CH3)2NH3^+(aq) + OH^-(aq)

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The equilibrium for the reaction between (Ch₃)2NH of the weak base is (CH₃)2NH(aq) + H₂O(l) ⇄ (CH₃)2NH₃⁺(aq) + OH⁻(aq).

What are weak bases?

A weak base is one that does not completely dissociate in water.

It leaves only a small proportion of hydroxide ions and the concerned basic radical in the resulting aqueous solution.

A large proportion of dissociated base molecules.

Thus, the equilibrium for the reaction is (CH₃)2NH(aq) + H₂O(l) ⇄ (CH₃)2NH₃⁺(aq) + OH⁻(aq).

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True or false: water is weird. Normally the solid form of a substance is more
dense/compact than the liquid form. When water freezes it forms
crystalline structures that make the molecules spread out causing ice to be
less dense than water and float. This is true of all substances.

Answers

Answer:

this would be true friend :)

Explanation:

for density, it generally goes solids, liquids, then gas in order from most dense, to least dense.

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Burning fossil fuels creates the ___________ gas carbon dioxide which increases global temperatures.

Question 4 options:

greenhouse


fossil


inert


poisonous

Answers

Greenhouse gas is your answer it is causing the greenhouse effect of trapping heat in the earth

Answer:

green house gas

Explanation:

when the concentration of NADH increases while the concentration of NAD+ decreases, will the electrochemical potential increase, decrease, or remain the same

Answers

When the concentration of NADH increases while the concentration of NAD+ decreases, the electrochemical potential however will increase

What is electrochemical potential?

Electrochemical potential can be defined as a measure of the difference between the average energy of the outermost electrons of the molecule or element in its two valence states.

What is NADP?

NADP is a coenzyme and simply has it full meaning as Nicotinamide Adenine Dinucleotide Phosphate

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Al2O3(s)+3CO(g)→2Al(s)+3CO2(g) Express your answer in kilojoules to one decimal place.

Answers

Based on the standard heat of formation of aluminium oxide, the heat of the reaction of the decomposition of aluminium oxide is +3339.6 kJ

What is the heat of reaction?

The heat or enthalpy of a reaction is the amount of heat evolved or absorbed when reactant molecules when reactants form products.

Considering the given reaction:

2 Al2O3(s) -> 2 Al(s) + 3 O2(g)

The heat of formation of aluminum oxide is -1669.8 kJ/mol.

The heat of the reaction of the decomposition of aluminium oxide is calculated as follows:

Heat of reaction = Heat of formation of products - Heat of formation of reactants

Heat of reaction = {3 × ΔHf°O2 (g) + 2 × ΔHf° Al(s)} - 2 × ΔHf° Al2O3 (s)

Since the standard enthalpy of formation,ΔHf°, of an element in its most stable form is equal to zero.

ΔH°rxn = (3 × 0 + 2 × 0) - 2 × -1669.8 kJ/

ΔH°rxn = +3339.6 kJ

Therefore, the heat of the reaction of the decomposition of aluminium oxide is +3339.6 kJ

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Which of the following is a pure substance?
O A. Milk
O B. Salt
O C. Blood
O D. Candy bar

Answers

Answer:

A. Milk

Explanation:

Cause is basics. It's proved by scientific I watched on TV and my teacher told me. I am a 100% sure.Go ask to your mother how many litres you drink her milk per day.

word equation for water​

Answers

Answer:

The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy. In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2). Energy will be released in the process.

Explanation:

Which electromagnetic wave does the student replace the question mark with in the table?
A
radio waves
B
gamma rays
C
infrared waves
D
visible light waves

Answers

Answer:

B) Gamma

Explanation:

Gamma is by far the most powerful, and only one that can produce this much energy

option c is your answer.

Write balanced equations and expressions for ksp for the dissolution of each of the following ionic compounds. Write a balanced equation for the dissolution of baso4

Answers

Based on the dissolution equation of BaSO4, the solubility product, Ksp, expression of BaSO4 is: [Ba^{2+}] × [SO4^{2-}]

What is solubility product Ksp of a solute?

The solubility product, Ksp, of a substance is an equilibrium constant which expresses the product of the concentration of ions produced by a solute.

The solubility of a solute depends on temperature, thus solubility product also depends on temperature.

The balanced equation for the dissolution of barium sulfate is given below:

BaSO4 ⇌ Ba^{2+} + SO4^{2-}

The solubility product for barium sulfate is given as;

Ksp = [Ba^{2+}] × [SO4^{2-}]

Therefore, the solubility product, Ksp, expression of BaSO4 is: [Ba^{2+}] × [SO4^{2-}]

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Animals burrow into soil is this mechanical weathering or chemical weathering

Answers

Answer:

Animals also contribute to mechanical weathering. Digging animals such as moles break apart rocks underground, while the movement of animals on surface rock can scratch the rock's surface or exert pressure that causes the rock to crack.

Explanation:

pls brainlist me, correct me if I'm wrong

Nitrogen is contained in which of the following?
a. adenine.
b. cytosine.
c. guanine.
d. thymine. d. uracil.

Answers

Answer:

DNA contains four nitrogen bases: adenine, thiamine, guanine and cytosine. Adenine and thymine pair, and guanine and cytosine pair.

Explanation:

In combination, nitrogen is found in the rain and soil as ammonia and ammonium salts and in seawater as ammonium (NH4+), nitrite (NO2−), and nitrate (NO3−) ions...

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