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What is meant by the term osmosis?

The net diffusion of water from an area of high concentration to low concentration across a partially-permeable membrane. 3 key elements to the definition1) Diffusion of water2) high conc to low conc3) pa...

Answered by Dominic I. • Biology tutor

2201 Views

The charge that flows through the shower in 300 seconds is 18000C. The electric shower has a power of 13.8 kW. Calculate the resistance of the heating element in the shower.

Firstly, we want to define what information we know from the question: ∆Q = 18000C; ∆t = 300s, P = 13.8kW
Therefore, to calculate the resistance we can use the power equation, P=I²R, and c...

Answered by Beth H. • Physics tutor

7068 Views

In Stage 2 of a reaction, 40 kg of titanium chloride was added to 20 kg of sodium. The equation for the reaction is: TiCl4 + 4Na -> Ti +4NaCl Relative atomic masses (Ar): Na = 23 Cl = 35.5 Ti = 48 Explain why titanium chloride is the limiting reactant.

To calculate which of titanium chloride or sodium is limiting, convert both into mol so they are directly comparable. You cannot compare in masses because in equations there is a conservation of moles and...

Answered by Simran L. • Chemistry tutor

13942 Views

Describe the lac operon, and it's transcriptional control when the concentration of glucose is low, and the concentration of lactose is high.

The lac operon is a section of DNA in E. Coli that consists of a promoter, operator and three genes encoding Beta-galactosidase, lactose permease and ano...

Answered by Albert T. • Biology tutor

2035 Views