Answer:
The potential energy the apple had due to its height is converted to kinetic energy
Explanation:
When an apple falls from the tree to the ground, its <u>energy of position stored as gravitational potential energy is converted to kinetic energy</u>, the energy of motion, as it falls. When the apple hits the ground, kinetic energy is transformed into heat energy.
Answer:
1...option B
2... peroids
3..group
4.. metals
5...7
6...dmitri mendeleev
7.. xenon
8... compound can be broken down by physical means
9... they can be broken down into simpler substance
sry if its wrong
last two 8th and 9th i do t think ots correct
number of moles of HI = 1.7 mol
number of moles of ZnBr2 = 3.43 mol
2HI + ZnBr2 → 2HBr + ZnI2
every 2 mole of HI will require 1 mole of ZnBr2
mole of ZnBr2 that will react = 1.7 / 2 = 0.85 mol
Therefore HI is the limiting reactant and not all ZnBr2 will be reacted
For every 2 mole of HI will form one mole ZnI2
1.7/2 = 0.85 mol of ZnI2 formed
Answer:
The molar mass of carbon
Explanation:
Before the mass (in grams) of two moles of carbon can be determined, <u>the molar mass of the element would be needed.</u>
<em>This is because the number of mole of an element is the ratio of its mass and the molar mass</em>. That is,
number of mole = mass/molar mass
Hence, the mass of elements can be obtained by making it the subject of the formular;
mass = number of mole x molar mass
<em>Therefore, the molar mass of carbon would be needed before the mass of 2 moles of the element can be determined.</em>