because people didn't have the right equipment to find more... hope this helped
Answer:
1.54 moles of pure ethanol are present in 750mL of wine
Explanation:
The sort of concentration 12% by volume, means that in 100 mL of solution (wine) 12 mL are pure ethanol
We use the density of pure ethanol to determine the mass:
Ethanol density = Ethanol mass / Ethanol volume
Ethanol density . Ethanol volume = Ethanol mass
0.789 g/mL . 12 mL = 9.47 g of ethanol
Now we can determine the moles: 9.47 g . 1 mol / 46.06 g = 0.205 moles
Now we can make a rule of three:
In 100 mL of solution (wine) we have 0.205 moles of pure ethanol
Then, in 750 mL of solution we may have (750 mL . 0.205) / 100 = 1.54 moles
<span>Yes, the material will float because it has a lower density than that of water.
A material will float if it has a lower density than that of the liquid it's placed in. So let's first calculate the density of this new material.
Density is simply mass per volume, so doing the division.
2.0 g / 3.0 cm^3 = 0.67 g/cm^3
The density of water is 1.0 g/cm^3 and since the density of the new material is less at 0.67 g/cm^3 it will float.</span>
Answer:
MITOSIS
Explanation:
In order for your cells to reproduce they must be capable of dividing into new cells. This means they must be able to divide the nucleus. This occurs during a process called mitosis. Mitosis is the process of splitting the cell's genetic material into two new nuclei.
In covalent bonds, atoms share electrons, whereas in ionic bonds atoms transfer electrons. The reaction components of covalent bonds are electrically neutral, whereas for ionic bonds they are both charged. ... Covalent bonds are formed between two non-metals, whereas ionic bonds are formed between a metal and non-metal.
