<span>I think D. shift the equilibrium reaction to favor the endothermic process. </span>
Answer:
Mitosis takes place in four stages: prophase (sometimes divided into early prophase and prometaphase), metaphase, anaphase, and telophase. You can learn more about these stages in the video on mitosis. In cytokinesis, the cytoplasm of the cell is split in two, making two new cells.
Carbon has 4 electrons in its outermost shell.it shows tetravalency and catination property hence forms long chain of carbon .
Answer:
The correct answer is 1.194 J/g.ºC
Explanation:
The heat released by the material is absorbed by the water. We put a minus sign (-) for a released heat and a plus sign (+) for an absorbed heat.
We know the mass of the material (mass mat= 25.0 g) and the mass of water (mass H20= 100.0 g) and the specific heat capacity of water is known (Shw=4.18 J/g.ºC), so we can equal the heat released by the material and the heat absorbed by water y calculate the specific heat capacity of the material (Shm) as follows:
heat released by material = heat absorbed by water
-(mass material x Shm x ΔT)= mass water x Shw x ΔT
-(25.0 g x Shm x (24ºC - 80ºC)= 100.0 g x 4.18 J/g.ºC x (24ºC-20ºC)
25.0 g x Shm x (56ºC) = 100.0 g x 4.18 J/g.ºC x 4ºC
⇒Shm= (100.0 g x 4.18 J/g.ºC x 4ºC)/(25.0 g x 56ºC)
Shm= 1.194 J/g.ºC
1) k2O = 2K(1+) + O(2-)
This is, every molecule of K2O consists of three ions (2 of K 1+, and one of O 2-)
2) Caluclate the number of moles of K2O
- molar mass of K2O = 2*39 + 16 = 94 g/mol
- n = mass / molar-mass = 9.4g / 94 g/mol = 0.1 mol
3) Multiply by 3 to have the number of moles of ions: 3 *0.1 mol = 0.3 mol of ions.
4) Multiply by Avogadro's number to obtain the number of ions"
0.3 mol * 6.0*10^23 =1.8 * 10^23 ions.
Answer: 1.8*10^23 ions
