Answer: Form/State/Space of the substance and the mass of the substance.
Explanation:
Explanations:- As per the significant figures rule, In multiplication and division, we go with least number of sig figs.
4.03 has three sig figs where as 0.0000035 has two sig figs only, The zeros in this number are not sig figs as they are just holding the place values. As the least number of sig figs here is two, the answer needs to be reported with two sig figs only.
![\frac{4.03}{0.0000035}=1.2*10^6](https://tex.z-dn.net/?f=%5Cfrac%7B4.03%7D%7B0.0000035%7D%3D1.2%2A10%5E6)
Answer:
It connects the two half‑reactions.
Explanation:
A salt bridge is a laboratory device used to connect the oxidation and reduction of half-cells of a galvanic cell. It prevents the cell from rapidly running its reaction to equilibrium.
Salt bridge or a porous plate connects the solutions of the half-cells that allow ions to pass from one solution to the other. This process balances the charges of the solutions and allows the reaction to continue.
Answer:
Mass, m = 19466.7 kg
Explanation:
Given that,
Portland cement concrete (PCC) has a density of 150 lb/ft³
We need to find how many kilograms of PCC are required to cast a cylindrical column 1.15 m in diameter and 7.8 m in height.
Since, 1 kg = 2.205 lb
1 lb/ft³ = 16.018 kg/m³
150 lb/ft³ = 2402.77 kg/m³
Density, ![d=\dfrac{m}{V}](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7Bm%7D%7BV%7D)
m is mass of PCC in kg and V is volume of cylinder
![m=d\times V](https://tex.z-dn.net/?f=m%3Dd%5Ctimes%20V)
![m=d\times \pi r^2 h\\\\m=2402.77\times \pi \times (1.15/2)^2\times 7.8\\\\m=19466.70\ kg](https://tex.z-dn.net/?f=m%3Dd%5Ctimes%20%5Cpi%20r%5E2%20h%5C%5C%5C%5Cm%3D2402.77%5Ctimes%20%5Cpi%20%5Ctimes%20%281.15%2F2%29%5E2%5Ctimes%207.8%5C%5C%5C%5Cm%3D19466.70%5C%20kg)
So, the mass of PCC required is 19466.7 kg.