Answer:
![\boxed {\tt 376.83 \ grams}](https://tex.z-dn.net/?f=%5Cboxed%20%7B%5Ctt%20376.83%20%5C%20grams%7D)
Explanation:
The density formula is
![d=\frac{m}{v}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7Bm%7D%7Bv%7D)
Rearrange the formula for mass, m, by multiplying both sides of the equation by v.
![d*v=\frac{m}{v}*v](https://tex.z-dn.net/?f=d%2Av%3D%5Cfrac%7Bm%7D%7Bv%7D%2Av)
![d*v=m](https://tex.z-dn.net/?f=d%2Av%3Dm)
The mass can be found by multiplying density and volume.
The density of the sugar is 1.59 grams per milliliter. The volume is 237 milliliters.
![d= 1.59 \ g/mL \\v= 237 \ mL](https://tex.z-dn.net/?f=d%3D%201.59%20%5C%20g%2FmL%20%5C%5Cv%3D%20237%20%5C%20mL)
Substitute the values into the formula.
![m= 1.59 \ g/mL * 237 \ mL](https://tex.z-dn.net/?f=m%3D%201.59%20%5C%20g%2FmL%20%2A%20237%20%5C%20mL)
Multiply. Note that the milliliters, or mL will cancel each other out.
![m=1.59 \ g * 237](https://tex.z-dn.net/?f=m%3D1.59%20%5C%20g%20%2A%20237)
![m=376.83 \ g](https://tex.z-dn.net/?f=m%3D376.83%20%5C%20g)
The mass is 376.83 grams.
Answer:
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- <u><em>pOH = 0.36</em></u>
Explanation:
Both <em>potassium hydroxide</em> and <em>lithium hydroxide </em>solutions are strong bases, so you assume 100% dissociation.
<u>1. Potassium hydroxide solution, KOH</u>
- Volume, V = 304 mL = 0.304 liter
- number of moles, n = M × V = 0.36M × 0.304 liter = 0.10944 mol
- 1 mole of KOH produces 1 mol of OH⁻ ion, thus the number of moles of OH⁻ is 0.10944
<u>2. LIthium hydroxide, LiOH</u>
- Volume, V = 341 mL = 0.341 liter
- number of moles, n = M × V = 0.341 liter × 0.51 M = 0.17391 mol
- 1mole of LiOH produces 1 mol of OH⁻ ion, thus the number of moles of OH⁻ is 0.17391
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<u>3. Resulting solution</u>
- Number of moles of OH⁻ ions = 0.10944 mol + 0.17391 mol = 0.28335 mol
- Volume of solution = 0.304 liter + 0.341 liter = 0.645 liter
- Molar concentration = 0.28335 mol / 0.645 liter = 0.4393 M
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<u>4. </u><em><u>pOH</u></em>
← answer
5.6 atm
In a container, the sum of partial pressures equals the total pressure. If the sun is 9.8 atm and the partial pressure of oxygen is 4.2 atm, the rest of the gases must account for the other 5.6 atm.
Answer:
The rubbing of certain materials against one another can transfer negative charges, or electrons. ... Remember, objects with the same charge repel each other. Because they have the same charge, your hair will stand on end. Your hairs are simply trying to get as far away from each other as possible!
Answer:
800 lb of pure solvent , 1700 lb of 20% solution and 500 lb of 10% solution will be mixed to form 3000 lb of 13 % solution .
Explanation:
3000 lb of 13% solution is required .
Total adhesive in weight = 3000 x .13 = 390 lb of adhesive
Available = 500 lb of 10% solution = 50 lb of adhesive
Rest = 390 - 50 = 340 lb required .
rest mass of solution = 3000 - 500 = 2500 lb
mass of adhesive required = 340 lb
Let the mass of 20% required be V
mass of adhesive = .20 V
.20 V = 340
V = 1700
rest of the volume = 2500 - 1700 = 800 lb which will be of pure solvent
So 800 lb of pure solvent , 1700 lb of 20% solution and 500 lb of 10% solution will be mixed to form 3000 lb of 13 % solution .