Mass C₆H₈O₇ : 0.531484 g
Further explanationReaction
3NaHCO₃ (aq) + C₆H₈O₇ (aq) → 3 CO₂ (g) + 3 H₂O (l) + Na₃C₆H₅O₇ (aq)
MW NaHCO₃ : 84 g/mol
mass NaHCO₃ : 7.10² mg=0.7 g
mol NaHCO₃ :
[tex]\tt mol=\dfrac{0.7}{84}=0.0083[/tex]
mol C₆H₈O₇ :
[tex]\tt \dfrac{1}{3}\times 0.0083=0.00277[/tex]
MW C₆H₈O₇ : 192 g/mol
mass C₆H₈O₇ :
[tex]\tt mass=0.00277\times 192=0.53184[/tex]
Q2 A solution has a (OH-) = 4.0x10^-5 M. What are the [H30+) and the pH of the
solution?
Answer:
[H₃O⁺] = 2.5 × 10⁻¹⁰ M
pH = 9.6
Explanation:
Step 1: Given data
Concentration of OH⁻ in the solution ([OH⁻]): 4.0 × 10⁻⁵ M
Step 2: Calculate the concentration of H₃O⁺ in the solution
Let's consider the self-ionization of water.
2 H₂O(l) ⇄ H₃O⁺(aq) + OH⁻(aq)
The ion-product of water (Kw) is:
Kw = 1.0 × 10⁻¹⁴ = [H₃O⁺] × [OH⁻]
[H₃O⁺] = 1.0 × 10⁻¹⁴/[OH⁻]
[H₃O⁺] = 1.0 × 10⁻¹⁴/4.0 × 10⁻⁵
[H₃O⁺] = 2.5 × 10⁻¹⁰ M
Step 3: Calculate the pH of the solution
We will use the following expression.
pH = -log [H₃O⁺]
pH = -log 2.5 × 10⁻¹⁰
pH = 9.6
Taking into account the definition of pH and pOH, the pH and [H₃O⁺] of the solution is 9.602 and 2.5×10⁻¹⁰ M respectively.
First of all, pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:
pH= - log [H⁺]= - log [H₃O⁺]
Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
The following relationship can be established between pH and pOH:
pH + pOH= 14
In this case, you know that [OH⁻]= 4×10⁻⁵ M. For this concentration, the pOH is calculated as:
pOH= - log (4×10⁻⁵ M)
pOH= 4.398
Then, pH can be calculated as:
pH + 4.398= 14
pH= 14 - 4.398
pH= 9.602
So, the [H₃O⁺] is calculated as:
9.602= - log [H₃O⁺]
[H₃O⁺]= 10⁻⁹ ⁶⁰²
[H₃O⁺]= 2.5×10⁻¹⁰ M
Finally, the pH and [H₃O⁺] of the solution is 9.602 and 2.5×10⁻¹⁰ M respectively.
Learn more:
brainly.com/question/13557815?referrer=searchResultsIf the pressure on 36.0 mL of a gas at STP is changed to a pressure of 35.3 kPa at constant temperature, the new volume of the gas is:
The new volume of the gas : 103.334 ml
Further explanationBoyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied
[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
1 kPa = 0,00986923 atm
35.3 kPa = 0,3483839 atm
at STP ( 0°C, 1 atm) with volume 36 ml changed to 35.3 kPa :
P₁=1 atm
V₁=36 ml
P₂= 0,3483839 atm
The new volume(V₂) :
[tex]\tt V_2=\dfrac{P_1.V_1}{P_2}\\\\V_2=\dfrac{1\times 36}{0,3483839}=103.334~ml[/tex]
the earth is 24,901 miles. how many hours would it take to travel around the earth if traveling 100 meters per second?
Answer:
24,901 x 1609.34 = 40074275
40074275/100 equals
400742.75 s
divided by 3600
111.31
Explanation:
How many grams of water (H2O) are produced from 34 grams of oxygen (O2)? *
Answer:
Explanation:
complete combustion reaction of ethane is given by the reaction
2C2H6+7O2..............4CO2+6H2O
no of moles in 34 grams of O2=34/32=1.063
7mole of O2 produced 6 moles of H2O
therefore 1.063 moles of O2 produced=1.063*6/7=0.9 moles
now 0.9 moles of H2O contain how much grams=0.9*18=16.2 grams
who wants these points
Answer:
GRACIAS
Explanation:
Answer:
Thnx
Explanation:
Which statement describes a way electromagnetic waves are different from
mechanical waves?
A. Electromagnetic waves can travel only through matter.
B. Electromagnetic waves can carry energy over a distance,
0 0
C. Electromagnetic waves can transfer matter through empty space.
D. Electromagnetic waves can travel through empty space,
Answer:
D. Electromagnetic waves can travel through empty space.
Explanation:
Answer:
its drum roll please D.) Electromagnetic waves can travel through empty space
Explanation:
please wash your hands and stay safe 2021
Of the following, which element has the highest first ionization energy?
Li
Cs
At
F
H2SO4(aq)+NaOH(s)> (neutralization of both acidic protons)
H2SO4(aq)+NaOH(s)----->NA2SO4 + H20
When acid and base reaction takes place, it will form salt formation takes place. I.e., neutralization reaction. H₂SO₄+2NaOH→ Na₂SO₄+ 2H₂O.
What is neutralization reaction?A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products.
H₂SO₄ is an acid and NaOH is a base. Acid react with base to form salt and water. Salt will be neutral charge and net ionic charge is zero.
Neutralization takes place when, complete dissociation takes place. If any partial dissociation, it will form acidic salt or neutral salt.
Thus complete dissociation neutral reaction is
H₂SO₄+2NaOH→ Na₂SO₄+ 2H₂O.
To find more about acid and base, refer the link below:
brainly.com/question/3941445
#SPJ2
Which element is the most similar to calcium ca
Answer:
strontium
Explanation:
Answer:
Strontium
Explanation:
This is a earth metal, calcium is a reactive metal that forms a dark oxide nitride layer when exposed to air.
What kinds of things can we learn by studying atoms?
Answer:
how and why things react, like why something turns into a gas or why something explodes.
Explanation:
List the pros and cons of combustion.
Answer:
burny stuff
Explanation:
Answer:
Explanation:
Majority of fuels are comprised of hydrocarbons or compounds that contain carbon and hydrogen atoms. In a perfect setting, oxygen is supposed to convert all the hydrogen to water while the carbon is transformed to carbon dioxide.
Unfortunately, achieving a perfect combustion process is near impossible in reality. Fuels burn when they react with the amount of oxygen in the air. With insufficient air, the combustion doesn’t push through normally and ends up as an incomplete or partial combustion. Instead of just carbon dioxide, water, and nitrogen, an impartial combustion process produces harmful byproducts like partially burned hydrocarbons (VOCs) and Nitrogen oxides. A loss in fuel economy also occurs because not all of the fuel is properly processed to produce energy.
9. What are the advantages of using an indicator to inform pH measurements? What are the advantages of using a pH meter?
Answer:
The advantages of using an indicator to inform pH measurements:
It gives a mathematically result of the pH, in addition, it gives the precise pH of solvent, and it also gives an idea of the straight of the solution also.
Now, the advantage of using a pH meter:
It is a rapid method to characterize between acids, bases. However, this method does not show how strong acid or base actually are, plus it tends to gives a range of acidity or basicity not quite accurate as a result.
How many grams are in 1.50 moles of KMnO4?
A. 165.06
B. 660.24
C. 178.41
D. 237.06
E. 484.29
Explanation:
mole=mass/Molar mass
mass= mole×molar mass
m= 1.5 × (39+55+64)
m= 1.5 × 158
m= 237g
There are 237.06 grams in 1.50 moles of KMnO4.
HOW TO CALCULATE MASS:
The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass. That is;mass of KMnO4 = no. of moles × molar mass of KMnO4Molar mass of KMnO4 = 39 + 55 + 16(4)= 158g/mol
mass of KMnO4 = 158g/mol × 1.5molMass of KMnO4 = 237gTherefore, there are 237.06 grams in 1.50 moles of KMnO4.Learn more at: https://brainly.com/question/15743584?referrer=searchResults
Which structure could a scientist look for in a plant that would identify it as a club moss rather than a liverwort?
O phloem
O spores
O rhizoids
O flowers
Answer:
what e said
Explanation:
Why is Mg++ smaller than Mg atom?
Answer:
The magnesium ion is much smaller than the magnesium atom because magnesium atom contains more electrons as compared to magnesium ion. Explanation: ... Whereas when an atom tends to lose an electron then it acquires a positive charge and size of the atom tends to increase.
Answer:
Because it looses it two electrons to form a stable octet Ionic form..........
Networks can be made of bonded ____________________ or ____________________.
Regional Metamorphism occurs when great masses of rock are exposed to pressure. What does this typically form?
Answer:
Gneiss forms by regional metamorphism from both high temperature and pressure. Quartzite and marble are the most commonly used metamorphic rocks.
How many moles of carbondioxide are produced when 0.2mol of sodium carbonate react with excess hydrovhloric acid
Answer:
0.2 moles of CO₂ are produced
Explanation:
Given data:
Moles of CO₂ produced = ?
Moles of Na₂CO₃ react = 0.2 mol
Solution:
Chemical equation:
Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O
Now we will compare the moles of CO₂ with Na₂CO₃ .
Na₂CO₃ : CO₂
1 : 1
0.2 : 0.2
Thus, 0.2 moles of CO₂ are produced.
A chemistry graduate student is given 250.mL of a 1.60M chlorous acid HClO2 solution. Chlorous acid is a weak acid with =Ka×1.1 x 10^2. What mass of NaClO2 should the student dissolve in the HClO2 solution to turn it into a buffer with pH =1.45?
Answer:
28.04g of NaClO2 must be dissolved
Explanation:
When NaClO2 and HClO2 are mixed in a solution, a buffer is produced. The pH of this buffer is obtained using H-H equation:
pH = pKa + log [NaClO2] / [HClO2]
Where pKa is -log Ka = 1.9586
And [NaClO2] and [HClO2] could be taken as moles of each compound.
Moles of HClO2 are:
250mL = 0.250L * (1.60mol / L) = 0.40 moles HClO2.
Replacing:
pH = pKa + log [NaClO2] / [HClO2]
1.45 = 1.9586 + log [NaClO2] / [0.40mol]
0.31mol = [NaClO2]
To convert these moles to mass we need to use molar mass of NaClO2: 90.44g/mol:
0.31mol * (90.44g / mol) =
28.04g of NaClO2 must be dissolved
What is the pH value of distilled water?
Answer:
7
Explanation:
CH4+O2—-CO2+H2O what is the best classification for the unbalanced equations reaction and why
how many moles of nitroge are there in 50.0 g of nitrogen?
1.785714286 moles
The number of moles (n) for nitrogen is: [ n=50.0÷28.0 ] = 1.785714286 moles.
Who can do my chemistry? It's due tonight, please! It’s about solubility interactive
Answer:
I can, i love chemistry
Explanation:
How many electrons are in the nucleus of an atom with an atomic number of
16?
O None. Electrons are not in the nucleus
08
O 16
O 32
Answer:
None. Electrons are not in the nucleus.
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral .
The atom having atomic number 16 have 16 electrons and these electrons are present out side the nucleus.
The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. Which comparison is best supported by this information?
a. They are in the same group because they have similar atomic masses, but they are in different periods because they have different chemical properties.
b. They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.
c. They are in the same group because their atomic numbers are each multiples of four, but they are in different periods because they have different chemical properties.
d. They are in the same group because they have similar atomic masses, but they are in different periods because they have very different atomic numbers.
Answer:
B: They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.
Explanation:
I took the Unit test on EDG and I got it correct
Pls mark me brainliest
Which is an example of a effect of geotropism
Answer:
An example of geotropism is the movement of nutrients. minerals and water in a plant. This transport is accomplished by specialized parts of the plant, the xylem which is pronounced zylem and the phloem which is pronounced flowem are the straw like parts of a plant’s stem that move the stuff up and down.
Explanation:
What are valence electrons? How would you determine the valence electrons of Oxygen?
Answer:
Valence electrons are the electrons located on the outer shell of the atom. To determine valence electrons of oxygen you can count how many electrons ae on the last shell of it's bohr diagram.
Explanation:
Write the net ionic equation for the reaction that occurs when equal volumes of 0.080 M aqueous acetic acid and sodium nitrite are mixed. It is not necessary to include states such as (aq) or (s).
Answer:
CH₃COO⁻ + NaNO₂ → CH₃COONa + NO₂⁻
Explanation:
When equal volumes of 0.080 M aqueous acetic acid and sodium nitrite are mixed (1:1), we have:
Acetic acid = CH₃COOH
Sodium nitrite = NaNO₂
The molecular equation is:
CH₃COOH(aq) + NaNO₂(s) → CH₃COONa(s) + HNO₂(aq)
The ionic equation is:
CH₃COO⁻H⁺ + Na⁺NO₂⁻ → CH₃COO⁻Na⁺ + H⁺NO₂⁻
The net ionic equation is:
CH₃COO⁻ + NaNO₂ → CH₃COONa + NO₂⁻
I hope it helps you!
how many moles are present in 10.0g aspartame
Answer:
Here is the answer:
Explanation:
can someone help. posted this same question 3-4 times.
Alina wants to make some yummy sugar cookies. The recipe written in her book is: 2 3/4 cup flour + 1 cup butter + 1 1/2 cup sugar + 1 egg + 1 tsp baking soda + 1/2 tsp baking powder = 24 cookies But Alina has the following ingredients in her kitchen: 9 cups flour, 5 cups butter, 4.5 cups sugar, 8 eggs and a excess of baking soda and powder. 1. How many cookies can she make? 2. Which ingredient is her limiting reactant? 3. Besides, baking soda and powder, how many of each reactant will be left over in her kitchen?
(JSYK: this is all considering that only whole batches are included and fractional batches aren't)
Answer: 3 batches (72 cookies), her limiting reactant should be sugar since she only has enough to make three batches exactly, and she will also have 3/4 a cup of flour left over, 2 cups butter, and 5 eggs, in addition to the excess of baking soda and baking powder.
Hope this helps, if not, comment below please!!!
