During the phosphatase experiment you will use a 1% w/v of phenolphthalein di-phosphate (PPP). How much PPP do you need to make 750ml of the solution if you only have 25g and you know that the MW of PPP is 478 g/mole

Explanation:

1 % w/v of  phenolphthalein di-phosphate (PPP)

will contain 1 gram of  phenolphthalein di-phosphate (PPP) in 100 mL of solution

750 mL solution will contain 7.5 g of PPP

750 mL solution will contain 7.5 / 478 moles  of PPP

750 mL solution will contain .0157 moles  of PPP

So 7.5 g of PPP or .0157 mole of PPP will be needed .

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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