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What two number have a sum of 645 and a difference of 151 the larger number is somewhere between the range of 392 to 402?
Let the two numbers be represented by 'a' and 'b'. Then, a + b = 645 And a - b = 151............adding these two eqations together gives :- 2a = 796 : a = 398..........and b = 645 - 398 = 247 (or b = 398 - 151 = 247).
Balanced chemical equations imply what a. Numbers of molecules are conserved b. Numbers of atoms are conserved c. Volume is conserved d. a and b or e. b and c?
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How do you find a torsion angle?
A torsion angle, also known as dihedral angle, is determined by the rotation around a bond connecting two atoms in a molecule. It is calculated using the positions of four atoms, typically labeled as A, B, C, and D, where A and D are the terminal atoms and B and C are the central atoms. The angle can be found using the vector cross product method or by applying the formula involving the scalar triple product of the vectors formed by these atoms. Tools like molecular modeling software or computational chemistry methods can also be used to visualize and calculate torsion angles.
How many rectangles have the perimeter of 24cm?
Infinitely many. Let B be any number less than 6 cm, and let L = 12-B cm. Then the perimeter of the rectangle, with length L and breadth B, is 2*[L+B] = 2*[(12-B)+B] = 2*12 = 24 cm. There are infinitely many possible values for B, between 0 and 6 and so there are infinitely many possible rectangles.
How many different rectangles have a perimeter of 24 gronks?
There are infinitely many such rectangles.Consider any positive number, B which is less than 6 gronks. Let L be 12-B gronnks. Then L > 6 and so no ordered pairs (L, B) will be equal to a (B, L).Any rectangle with length L gronks and breadth B gronks will have a perimeter of 2*(L+B) = 2*12 = 24 gronks.Since the choice of B was arbitrary there are infinitely many choices for B and since each value of B gives a unique rectangle, there are infinitely many rectangles.As many as you want.
How many atoms are in 15.8 moles of boron?
To calculate the number of atoms in 15.8 moles of boron, you can use Avogadro's number, which is 6.022 x 10^23 atoms/mole. Multiply 15.8 moles by Avogadro's number to get approximately 9.5 x 10^24 atoms of boron.
Calculate the number of moles in 5.34 10 21 atoms of boron?
To calculate the number of moles, first calculate the molar mass of boron (B), which is approximately 10.81 g/mol. Then use the Avogadro's number (6.022 x 10^23) to convert the number of atoms to moles. So, moles = number of atoms / Avogadro's number = 5.34 x 10^21 / 6.022 x 10^23 ≈ 0.089 moles of boron.
What is the mole ratio that can convert from moles of a to moles of b?
The mole ratio to convert from moles of a to moles of b is determined by the coefficients of a and b in the balanced chemical equation. For example, if the balanced equation is 2A + 3B -> 4C, the mole ratio would be 3 moles of B for every 2 moles of A.
How many moles of B in 20g of borax?
To calculate the number of moles in 20g of borax (Na2B4O7), we first need to find the molar mass of borax. By adding the atomic masses of all the elements in borax, we get a molar mass of approximately 201.22 g/mol. Then, we use the formula: moles = mass / molar mass. Substituting in the values, we find that there are approximately 0.10 moles of borax in 20g. Since there are four boron atoms in one molecule of borax, the number of moles of B (boron) would be 0.10 moles * 4 = 0.40 moles.
How many moles are in CF2Cl2?
Well, there are 140 grams of 2Cl2 in one mole of it. You take the atomic mass and find how many atoms and multiply them together. Chlorine has an atomic mass of about 35, so multiply by four b/c there are four Cl atoms in 2Cl2 .
How many atoms of oxygen are contained in each what How many oxygen atoms in 21 g of O2 How many oxygen atoms in 0.812 moles MgO How many oxygen atoms in 3.2 x 1022 molecules of C6H12O6?
a. number of atoms = mass / molar mass x avagadros number 21/16x6.02x1023=7.9x1023 atoms b. number of atoms = moles x avagadros number 0.812x6.02x1023=4.89x1023 atoms as there is 1 O atom in each molecule of MgO, there are 4.89x1023 atoms of Oxygen. c. if there are 3.2x1022 molecules and 6 oxygen atoms in each molecule then: (3.2x1022)x6=1.92x1023 Oxygen atoms.
Consider the hypothetical reaction 3A2 2B-----C 2D How many moles of D can be formed from 5.00 moles of A2 and excess B?
From the balanced reaction, 3 moles of A2 produce 2 moles of D. Therefore, 5 moles of A2 will produce (5/3) x 2 moles of D, which is approximately 3.33 moles of D. Excess B indicates that there is more than enough B to completely react with the 5.00 moles of A2.
How many moles of fluorine in 3 moles of borontrifluoride?
Boron trifluoride is BF3. So each mole of BF3 contains 1 moles of boron (B) and 3 moles of fluorine (F). Thus, 3 moles of BF3 contains NINE moles of fluorine.
What is the mass of a boron sample which contains 585 moles of b atoms?
Each mole of boron atoms has a mass of 10.811 grams, as indicated by the gram atomic mass or weight of boron. Therefore, 585 moles has a mass of about 6.32 X 103 grams, to the same number of significant digits as 585.
Calculate the number of atoms in 13.2 mol copper.?
b. 7.95 ´ 1024 atoms
How many moles of tungsten atoms are in 4.8x10 25 atoms of tungsten?
The answer is B, 8.0 x 10^1 There are 6.023 x 10^23 atoms in one mole, of any substance. So simply divide 4.8 x 10^25 by 6.023 x 10^23, to get about 79.69 which if you convert into scientific notation, is about 8.0 x 10^1 the answer for me was A but that's on novanet
What would you multiply atoms of boron by to get the units grams of boron?
There is no direct relationship between atoms of boronand grams of boron. Use Avogadro's number to convert atoms to moles, and the atomic mass to convert moles to grams.Since you are converting from atoms B, this goes in the denominator (on the bottom) of the first factor. You want to end up in units of grams of B, so this goes in the numerator (on the top) of the last factor.atoms B1.00 mole B10.8 gram = g B6.02E+23 atom B1.00 mole BNote that the units atoms boron "cancel out" in the first factor and you are left in units of moles. Moles cancel outin the second factor and the final units are grams boron.
