Answer:
1.76 x 10²²molecucles
Explanation:
Given parameters:
Mass of the sugar C₁₂H₂₂O₁₁ = 10g
Unknown:
Number of molecules = ?
Solution:
The number of molecules can be determined if we find the number of moles first.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of C₁₂H₂₂O₁₁ = 12(12) + 22(1) + 11(16) = 342g/mol
Number of moles = [tex]\frac{10}{342}[/tex] = 0.029mole
1 mole of C₁₂H₂₂O₁₁ will contain 6.02 x 10²³
0.029 mole of C₁₂H₂₂O₁₁ will be made up of 0.029 x 6.02 x 10²³
= 1.76 x 10²²molecucles
The net ionic equation for the dissolution of zinc metal in aqueous hydrobromic acid is ________.
Answer:
[tex]Zn(s)+2H^+(aq)\rightarrow Zn^{2+}(aq)+H_2(g)[/tex]
Explanation:
Hello!
In this case, since writing the net ionic equation implies the complete molecular equation, we should start by:
[tex]Zn(s)+2HBr(aq)\rightarrow ZnBr_2(aq)+H_2(g)[/tex]
Next, we represent the ionization of the aqueous species:
[tex]Zn(s)+2H^+(aq)+2Br^-(aq)\rightarrow Zn^{2+}(aq)+2Br^-(aq)+H_2(g)[/tex]
Whereas the spectator ions, those at both reactants and products are cancelled out so the net ionic equation is obtained:
[tex]Zn(s)+2H^+(aq)\rightarrow Zn^{2+}(aq)+H_2(g)[/tex]
Best regards!
Which of the following statements is true for a scientific theory?
It is a tentative explanation.
It is tested by multiple scientists.
It is based on only one experiment.
It is investigated over a short period.
Answer:
It is tested by multiple scientist
Explanation:
just took the test, B is correct
Which of the following is the highest level in the organization of living things?
Organ system
Organism
Tissue
Compound
Answer: The correct answer is Organism.
Explanation:
because.....
that is the part that control the rest.
*Hopefully this helps!!!
Answer:
organism or organ system
Explanation:
i forgot what that dude said up there
How are alloys made?
what is meant by votalite in chemistry
Answer: This may help you
https://ay.live/BNNBhX
Explanation:
What is the condensed structural formula of C7H8N4O2
Answer:
C7H8N4O. The molecular formula C7H8N4O2 (molar mass: 180.16 g/mol) may refer to: Paraxanthine. Theobromine.
On the periodic table, Nitrogen has 7 what?
Answer:
[tex]\boxed {\boxed {\sf 7 \ protons}}[/tex]
Explanation:
On the Periodic Table, Nitrogen is:
A nonmetalIn group 15 and period 2 With an atomic mass of 14.007 amu With the atomic number 7In elements, their atomic number is also equal to the number of protons. As the number of protons in an atom change, so does the identity of the atom.
Since nitrogen has an atomic number of 7, it must always have 7 protons
Calculate the mass percent of hydrogen in CH3OCH3. Answer in 2 decimal places without unit.
The answer will be 13.02 % of hydrogen.
Mass Percentage : It is used to estimate the mass % of an element in a compound.
CH3OCH3 - chemical name is dimethyl ether also known by the name of methoxymethane.
It is an organic compound.
Also is an isomer of an ethanol.
There are 6 molecules of Hydrogen present in CH3OCH3
So, mass percent of hydrogen = Total number of molecules present in the compound *100 / Molecular weight of the compound
= 6 *100 / Molar mass of CH3OCH3
= 600 / 46.07 = 13.02 %
So, the mass percentage of hydrogen in C2H6O will be 13.02 %
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There’s bots who create questions and then suddenly get a response and there’s me who waits hours for a response. Lol really nice
If anyone can answer this I will make you brainiest.
The____ of a gas solute determines whether or not that gas will dissolve in a solvent.
This feature of a volcano is called an____________________which releases heated ash and Tephra through its column generating its own lightning.
Fill in the blank!
Answer:
Volcanic Eruption releases heated ash and Tephra through its column generating its own lightning.
Hope it helps!<3
Calculate the pHpH of a 0.10 MM solution of HClHCl . Express your answer numerically using two decimal places.
Answer: The pH 0f 0.10 solution of HCl is 1.00
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]HCl\rightarrow H^++Cl^{-}[/tex]
According to stoichiometry,
1 mole of [tex]HCl[/tex] gives 1 mole of [tex]H^+[/tex]
Thus [tex]0.10[/tex] moles of [tex]HCl[/tex] gives =[tex]\frac{1}{1}\times 0.10=0.10[/tex] moles of [tex]H^+[/tex]
Putting in the values:
[tex]pH=-\log[0.10][/tex]
[tex]pH=1.00[/tex]
Thus pH 0f 0.10 solution of HCl is 1.00
Anyone knows the answer?
Answer:
No I do not but did you know that you can save 15 or more on car insurance by switching to geico?
Explanation:
The bond angles increase steadily in the series PF3, PCl3, PBr3, and PI3. Using the concepts that you have learned in chapters 7-10, explain this observation.
Answer:
See explanation
Explanation:
Electronegativity is the ability of an atom in a molecule to attract the shared electrons of a covalent bond towards itself. Electronegativity is a trend that increases across the period and decreases down the group in the periodic table.
All the compounds listed are halides of phosphorus. The electronegativity of halogens decrease in the order; F> Cl> Br > I. Hence F has the greatest electronegativity in the group. It decreases as atomic and ionic radius increases.
As the electronegativity of the halogen atom decreases, the electron pair on the halogen atom lie closer to the central phosphorus atom hence the repulsion between electrons increases and so does the bond angle increase likewise.
A 60.0 mL sample of nitrogen is warmed from 350 K to 400 K. Find its new volume if the pressure remains constant.
0.0145 ml
52.50 ml
0.0191 ml
68.57 ml
yes
Answer:68.57
Explanation:
HelapPPPpPPPPpThe three states of matter that may change during a physical change are O atoms, molecules, electrons O color, shape, size O solid, liquid, gas
Answer:
Solid liquid and gas
Explanation:
Every neutral atom of a given element has the same number of what two subatomic particles?
A. Protons and neutrons
B. Protons and electrons
Answer:
protons and electrons
Explanation:
because two atoms of the same elements have different(mass)isotope so the answer is B
What makes a solution saturated?
Answer:
maximum amount of solute that is capable of being dissolved
Answer: A solution that contains a maximum amount if solute that is capable of being dissolved
Explanation:
A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved.
A gas mixture contains 0.800 mol of N2, 0.200 mol of H2, and 0.150 mol of CH4. What is the mole fraction of H2 in the mixture?
Answer:
0.1739
Explanation:
0.800 mol of N2
0.200 mol of H2
0.150 mol of CH4
Total moles of the mixture = 0.8 + 0.2 + 0.150 = 1.150 mol
Mole fraction of H2 = Number of moles of H2 / Total moles
Mole Fraction = 0.2 / 1.150 = 0.1739
What is the relationship between KMT and Sea Level Rise?
Relationship between KMT and Sea Level Rise because sea level rise in KMT with distance of 760nm
KMT is described as the behavior of gases and also it is used to explain macroscopic properties of a gas such a pressure and temperature and sea level rise is an increase in the level of the world oceans due to the effects of global warming and burning fossil fuels is one of the causes of global warming because it releases carbon dioxide and other heat-trapped gasses into the atmosphere so here the relationship between kinetic molecular theory and sea level rise is distance between sea level and KMT is 760nm sea level is rise because gas level is is increases.
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Answered
A student wants to measure the temperature of a solution. The student
takes 10 measurements and determines that the temperature is about 24.6 degrees celsius. If the true temperature is 24.3 degrees celsius, what is the absolute error in the measurement?
Answer:
0.3 or 0.30
Explanation:
The discrepancy between a quantity's measured or inferred value and its actual value is known as the absolute error. The absolute error is insufficient because it provides no information about the significance of the error. The absolute error is -0.3.
An important component of scientific calculations is measurement. Results from measurements that are entirely correct are incredibly unusual. Small mistakes are frequent while monitoring various metrics. Different kinds of errors result in variations in measurement. Mathematical equations can be used to express all faults.
The difference between a quantity's measured value and actual value is used to compute the absolute error. The absolute error is written as, if the measured value is x and the actual value is x₀.
∆x = x₀- x
∆x = 24.3 - 24.6
∆x = -0.3
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When 35.0 mL of 0.400 M hydrochloric acid and 35.0 mL of 0.400 M sodium hypochlorite are combined, the pH of the resulting solution will be :
Answer:
pH = 7.49
Explanation:
This is a buffer solution. We can apply Henderson Hasselbach equation:
pH = pKa + log ((total mmoles - mmoles HCl) / mmoles HCl)
We have the same amount of mmoles.
35 mL . 0.400 M = 14 mmoles HCl
35 mL . 0.400 M = 14 mmoles NaClO
Total moles are 28 mmoles.
We replace data:
pH = pKa + log ((28 mmoles -14 mmoles) / 14 mmoles)
Notice that the relation in log = 1. So pH = pKa
pKa for HClO is 7.49
When pH = pKa we have the same amount of base and acid. Notice, that we have the same mmoles of HCl and NaClO.
Remember that a buffer can be prepared with:
a) A weak acid and its conjugate base (acetic /acetate)
A weak base and its conjugate acid (ammonia/ammonium)
b) A weak acid with a strong base, where the acid can be in excess.
c) A conjugate base (salt from weak acid) with a strong acid, where the base can be in excess. (This case but, the base is not in excess, that's why ph = pKa)
What is the standard cell potential for a voltaic cell using the Pb2 /Pb and Mg2 /Mg half-reactions and which metal is the cathode
Answer:The standard cell potential, E˚cell =2.234 V, Pb metal is the cathode.
Explanation:
The Half cell reactions are
Pb2+(aq) + 2e– > Pb(s) ------E˚ = –0.136 V
Mg2+(aq) + 2e–>Mg(s)------- E˚ = –2.37 V
In a voltaic cell, reduction occurs at the cathode and oxidation occurs at the anode
Mg(s)---->Mg2+(aq) + 2e– ( anodic oxidation)
Pb2+(aq) + 2e----> Pb(s) ( Cathodic reduction)
We can see that Mg has a more negative reduction potential value leading to having a low reduction potential and therefore will occur at the anode since it will be oxidized. On the other hand Pb2+ has a less negative reduction potential and therefore will have a high reduction making it to occur at the cathode and be reduced
Using The standard cell potential, E˚cell = E˚cathode – E˚anode
E˚cell = –0.136 - (–2.37)
E˚cell=2.234 V
A minority of elements on the right side of the periodic table that tend to form the negative charges
Answer:
Wrong
Explanation:
Because they are non metals and tends to form negative charged ions
Which form of asexual reproduction describes the process of a cell dividing to
produce a copy?
A. Binary fission
B. Budding
C. Fragmentation. PLS I NEED HELP
D. Amputation
PLS I NEED HELP
Answer:A
Explanation:Binary Fission, meaning ‘getting divided into half’ is a type of asexual reproduction where a single living cell grows twice its size and then splits to form two identical daughter cells, each carrying a copy of the parent cell’s genetic material. Examples of cells that use binary fission for division
Answer:
i think its a
Explanation:
how do you do stoichiometry
suppose we have a reaction as follows :
nA + mB ---> pC + qD
where n,m,p,q are natural numbers
these natural numbers are called stoichiometric coefficients .
Eg:
2P + 3Br2 ---> 2PBr3
here, 2, 3 from reactant side and 2 from product side are called stoichiometric coefficients
hope this helps...
Which of Earth’s spheres do humans impact and how?
You will get a free foot if you answer this
Answer:
humans have a huge impact on all spheres. if you negatively impact the spheres, such as burning fossil fuels, it'll pollute the atmosphere.
Explanation:
All four spheres of Earth are susceptible to human influence. Burning fossil fuels can cause pollution to be released into the atmosphere. Garbage accumulated by humans in landfills has an impact on the geosphere. Human waste enters waterways and has an effect on the hydrosphere.
What is geosphere ?Different definitions of the geosphere have conflicting uses. It can be used to refer to the atmosphere, lithosphere, hydrosphere, and cryosphere as a whole. Different mass and/or energy flows can be exchanged between the various geosphere collectives.
Land erosion and soil movement currently result from human activity more frequently than from any natural mechanism. Human-caused air and water pollution has a negative impact on the environment, rivers, and lakes, harming both other animals and people's health.
According to some scientists, humans have their own sphere, the "anthrosphere." But for the purposes of this module, people will also be considered a component of the biosphere.
Thus, Garbage accumulated by humans in landfills has an impact on the geosphere.
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Drag the text elements below into the gray boxes to create an equation that calculates the mass of CH, required to create 24.0 g of H₂O.
The mass of CH₄ required to create 24.0 g of H₂O is 10.67 g
Balanced equationCH₄ + 2O₂ -> CO₂ + 2H₂O
The following were obtained from the balanced equation:
Molar mass of CH₄ = 12 + (1 × 4) = 16 g/mol Mass of CH₄ from the balanced equation = 1 × 16 = 16 gMolar mass of H₂O = (2 × 1) + 16 = 18 g/mol Mass of H₂O from the balanced equation = 2 × 18 = 36 gFrom the balanced equation above,
36 g of H₂O were produced from 16 g of CH₄
How to determine the mass of CH₄ requiredFrom the balanced equation above,
36 g of H₂O were produced from 16 g of CH₄
Therefore,
24 g of H₂O will be produced from = (24 × 16) / 36 = 10.67 g of CH₄
Thus, 10.67 g of CH₄ is needed for the reaction
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Complete question:
See attached photo
A formula that relates the amount of a substance to a mass?
Explanation:
A formula mass of substance is a sum of the average atomics masses of each atom represented in the chemical formula and is expressed in atomic mass units.the formula mass of covalent compound is also called the molecular mass
I need help with this question
Answer:
kajjajjanwjsjjsjsjsjsjjsjsj
Explanation:
jqqjjqj
Why is Hydrogen-2 a heavier isotope than Hydrogen-1?
A. Hydrogen-2 has one more proton
B. Hydrogen-2 has one more neutron
Answer:
It is A. hydrogen -2 has one more proton