Aseries stack of alkaline cells produces 6 kw of power. if each cell contributes 14.5 w, how many cells are in the stack? (round to the nearest whole number.) a) 2 b) 21 c) 87 d) 414

- The correct answer is D)414.

Solution:- From given information, one cell contributes 14.5 W. We need to calculate the number of cells that would produce 6 kW of power.

We know that, 1 kW = 1000 W

Convert Given kW to W and divide by the power of one cell to calculate the number of cells required. The set is made as:

= 414 cells

So, 414 cells need to be there in the stack to produce 6kW of power.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.