The chemical equation below shows the photosynthesis reaction. 6CO2 + 6H2O mc010-1.jpg C6H12O6 + 6O2 The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?
Answers
Answer:
12 mol of water
Explanation:
First we must find the moles of CO2.
We know that 1 mole of co2 has a mass of 4.01 g so how many moles will there be in 528 g.
We apply a simple rule of three
By stoichiometry we know that for every 6 moles of carbon dioxide 6 moles of water are needed, now if we have 12 moles of carbon dioxide how many moles of water will be needed
We apply a simple rule of three
6CO2 + 6H2O -> C6H12O6 + 6O2
molar mass of carbon dioxide (CO2) is 44.01 g/mol
molar mass of water (H2O) is 18.01 g/mol
528 g of CO2
Required:
moles of water
Solution:
528 g of CO2/ (44.01 g/mol CO2) = 12 moles CO2
12 moles CO2 (6 moles H2O/ 6 moles CO2) = 12 moles H2O
12 moles H2O (18.01 g/mol H2O) = 216.12 grams H2O
Related Questions
The reactants in a chemical reaction contain 900 J of chemical energy. The products of the reaction contain 9000 J of chemical energy. Which statement best describes this chemical reaction? The reaction absorbs 9000 J of energy from the surroundings as it proceeds. The reaction releases 9000 J of energy to the surroundings as it proceeds. The reaction absorbs 8100 J of energy from the surroundings as it proceeds. The reaction releases 8100 J of energy to the surroundings as it proceeds. The answer is C
After taking a hot shower you may notice that the room gets steamy and the mirror is foggy you might also notice that there is moisture on the walls use these observations to come up with one reason why the temperature of the bathroom increases when you take a hot shower
The electron affinity of an atom typically depends on theA. mass of the atom's nucleus. B. number of electrons already present in the atom. C. number of neutrons in the nucleus of the atom. D. availability of an unfilled orbital in the atom.
A particle with 12 electrons has a -2 charge. How many protons does it have.
Answers
examples: the conjugate acid of Cl⁻ is HCl, the conjugate acid of PO₄³⁻ is HPO₄²⁻, the conjugate acid of NH₃ is NH₄⁺, the conjugate acid of HCO₃⁻ is H₂CO₃, and the conjugate acid of H₂O is H₃O⁺
To find the conjugate base of a chemical you just reverse that process (take away a hydrogen).
examples: the conjugate base of H₂SO₄ is HSO₄⁻, the conjugate base of CH₃COOH is CH₃COO⁻, the conjugate base of H₃PO₄ is H₂PO₄⁻, and the conjugate base of H₂O is OH⁻.
When you identify conjugate acids and bases in a reaction you look to see what lost a proton and what gained a proton. The chemical that gave up the proton acted as an acid and produced a conjugate base while the chemical that accepted a proton produced a conjugate acid.
Example: HCl+NaOH⇒NaCl+H₂O The acid is HCl and its conjugate base is Cl⁻ while NaOH was the base and H₂O is the conjugate acid. (you can ignore the sodium since it is a spectator ion).
11) When completing acid base reactions, need to identify the acid and the base since the acid will give a proton the base creating a conjugate base of the acid and conjugate acid of the base. (You need to balance the equation after you determine what the products will be)
example: H₂SO₄+2NaOH⇒Na₂SO₄+2H₂O (SO₄²⁻ is the conjugate base of HSO₄⁻ which is the conjugate base of H₂SO₄. HSO⁻ is created with the first NaOH molecule and then SO₄⁻ is created with the second NaOH.)
12) All acid base reaction form a salt consisting of the cation from the base and anion from the acid.
examples: NaCl could have come from NaOH reacting with HCl. K₃PO₄ could have come from KOH and H₃PO₄.
13) I don't really know how you are supposed to solve it with out knowing the Ka value of H₂S. H₂S is a weak acid and therefore will not dissociate completely in water so the only way of being able to find the concentration of H⁺ ions that dissociate is knowing the Ka value of H₂S and using ice tables. (Ka=[H⁺][A⁻]/[HA] and is basically the equilibrium constant for the acid when put into water where A⁻ is the conjugate base and HA is the acid).
14) Ca(OH)₂ is a strong base and will therefore dissociate completely in water. That means that when you find the concentration of OH⁻ in solution you can multiply that by the volume of the solution (in liters) to find the number of moles of OH⁻. Then you can divide that by 2 to find the number of moles of Ca(OH)₂ needed. pOH=14-pH which means that pOH=4.2. [OH⁻]=10^-pOH which means [OH⁻]=6.3x10^-5 M. 6.3x10^-5Mx3.00L=1.89x10^-4mol OH⁻ which means that (1.89x10^-4)/2=9.46x10^-5mol Ca(OH)₂.
I hope this helps. Let me know if anything is unclear.
Answers
Considering the definition of electronic configuration and valence shell, the number of core electrons is 1, because the valance shell is the third energy level.
The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level. Electrons with less energy will be spinning at level 1.
Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f.
Aufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits around the nucleus of the atom.
This principle states that the filling of these orbitals occurs in increasing order of energy, that is, from the orbitals of lower energy to those of higher energy.
The simplest of the sub-levels is 1s. If you fill the 1s you can start filling the 2s. After the 2s sub-level is satisfied, the 2p can begin to fill and so on.
The valence shell is the one where the outermost electrons are found, those electrons that are in the last level. Because it is the outermost shell, it is also the farthest from the atomic nucleus.
The valence shell is one whose electrons are responsible for the chemical properties of an element.
In this case, an atom has 2 electrons in the first energy level, 8 electrons in the second energy level, and 1 electron in the third energy level. So, the number of core electrons is 1, because the valance shell is the third energy level.
Learn more:
- brainly.com/question/25653224
- brainly.com/question/19710066?referrer=searchResults
- brainly.com/question/20985070?referrer=searchResults
- brainly.com/question/13980678?referrer=searchResults
- brainly.com/question/8140611?referrer=searchResults
- brainly.com/question/21267620?referrer=searchResults
- brainly.com/question/8001694?referrer=searchResults
Final answer:
The atom described has 10 core electrons. These are located in the first and second energy levels, which are filled from lowest to highest. The electron in the third energy level is a valence electron.
Explanation:
The question you asked involves understanding the structure of atomic energy levels (or shells). In an atom, electrons fill in the energy levels from lowest to highest. The core electrons are those in the inner energy levels.
In your case, the atom has 2 electrons in the first energy level and 8 in the second energy level, making a total of 10 core electrons. The one electron in the third energy level would be considered a valence electron, not a core electron, because it's located in the outermost energy level of the atom.
Learn more about Core Electrons here:
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how many moles are in 9.8 grams of calcium?
Answers
and we can get the molar mass of Ca, it is = 40 g/mol
and we have already the mass of Ca (given) = 9.8 g
so, by substitution: the moles Ca = 9.8 g / 40 g/mol
= 0.245 moles
According to mole concept, there are 0.245 moles in 9.8 grams of calcium.
Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Number of moles=mass/molar mass=9.8/40=0.245 moles.
Learn more about moles,here:
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Answers
1 Cu + 2 AgNO₃ -> 1 Cu (NO₃)₂ +2 Ag
63,546 -------- 2 * 169.87
? g Cu ------- 45.0
Mass ( Cu ) = 45.0 * 63,546 / 2 * 169.87
Mass ( Cu ) = 2859,57 / 339,74
Mass = 8.4169 g of Cu
hope this helps!
blue end of the spectrum
middle of the spectrum
The light-gathering capacity of a telescope is dependent upon the:
magnification
focal length
size of human iris
area of aperture
Answers
Answer:
1) blue end of the spectrum
2) area of aperture
Explanation:
1) The electromagnetic spectrum encompases a wide range of frequency (ν) and wavelength (λ) that includes gamma rays, x-rays, ultra violet(UV), visible, infra red (IR), microwaves and radiowaves. The wavelength increases from gamma rays to radio waves.
The wavelength perceivable by human eyes lies in the UV-visible region which extends from 380 nm in the blue to 740 nm in the red.The shortest wavelengths occur in the blue end of the spectrum which also have the highest energy. In contrast, longer wavelengths occur on the red which have lower energy.
2) The light gathering capacity of a telescope is dependent upon its area of aperture. Larger the area, greater is the light gathering power which implies that the telescope has the capability of detecting weak or faint objects.
The area of the aperture is essentially the area of the objective of the telescopic lens which is given as:
where D = diameter of the lens
1) blue end of the spectrum
2) area of aperture