Answer:
48g of Magnesium.
Explanation:
We know that:
Mole=given mass/molar mass
Then, moles of aluminum = 54/27 = 2.
A/c to question ,
For 2 moles of magnesium it's mass is 2×24=48g.
Hence, the required mass for same number of magnesium atoms is 48g.
(Hope this helps can I pls have brainlist (crown)☺️)
Answer:
Yes and im usually sooooo happy to see it.
Answer:
THE FREEZING POINT OF A WATER SOLUTION OF FRUCTOSE MADE BY DISSOLVING 92 g OF FRUCTOSE IN 202g OF WATER IS -4.70 ◦C
Explanation:
To calculate the freezing point of a water solution of fructose,
1. calculate the molar mass of Fructose
( 12 * 6 + 1*12 + 16*6) =72 + 12 +96 = 180 g/mol
2. calculate the number of moles of fructose in the solution
number of moles = mass / molar mass
n = 92 g / 180 g/mol
n = 0.511 moles.
3. calculate the molarity of the solution
molarity = moles / mass of water in kg
molarity = 0.5111 / 202 g /1000 g
molarity = 0.5111 / 0.202
molarity = 2.529 M
4. calculate the change in the freezing point of pure solvent and solution ΔTf
ΔTf = Kf * molarity of the solute
Kf = 1.86 ◦C/m for water
ΔTf = 1.86 * 2.529
ΔTf = 4.70 C
5. the freezing point is therefore
0.00 ◦C - 4.70 ◦C = -4.70 ◦C
A water cycle is the process where water moves between the earth's surface and the atmosphere and vice versa.
There are four stages of water cycle and these are evaporation, condensation, sublimation, precipitation, transpiration, runoff and infiltration.
STAGE 1: EVAPORATION- This is when the warmth from the sun causes waters from different bodies of water like the oceans, lakes, rivers, streams and ice to rise into the air and transforms into gases or water vapor.
STAGE 2: CONDENSATION- The vaporized water would then rise up in the atmosphere. In areas of high altitude, the water vapor changes into very tiny particles of ice/water droplets. This is because the temperature is low in high altitudes. This is also when the particles come together and form into clouds and fogs in the sky.
STAGE 3: SUBLIMATION- This is the counterpart of evaporation. This is the process where ice is being converted directly into water vapor. This happens when the temperature is low or pressure is high.
STAGE 4: PRECIPITATION- The clouds (condensed water vapor) pours down as the precipitation, which is affected by the wind or temperature, changes. This occurs because the water droplets combine with one another to form bigger droplets.
STAGE 5: TRANSPIRATION- This process is similar to evaporation but it happens in plants. The roots of the plants absorb the water and push it towards the leaves where it is used in photosynthesis. The excess water is then being extracted out of the leaves through the pores of the leaves or the stomata.
STAGE 6: RUNOFF- This is the process where water literally runs or flows in the earth's surface. When snow melts into water it has the tendency to runoff.
STEP 7: INFILTRATION- This is when some of the water precipitates does not runoff into the rivers. Instead, they are absorbed by the plants or got evaporated and moves deep down into the soil.
