CHEMISTRY COLLEGE

Solve for x . 875 = 5 x 3 Express the answer to the hundredths place (i.e., two digits after the decimal point).

Answers

Answer 1

Answer:

Answer : The value of 'x' for this expression is, 5.59

Explanation :

The given expression is:

$875=5x^3$

Now we have to determine the value of 'x' by solving the above expression.

$875=5x^3$

$(875)/(5)=x^3$

$175=x^3$

$x=(175)^(1/3)$

$x=5.59$

Thus, the value of 'x' for this expression is, 5.59

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Describe how you would make 250 ml of a 3 M solution of sodium acetate (NaOAc = 82.03 g/mol). First figure out how much sodium acetate you would need, then describe how you would make the solution if you were given a bottle of solid sodium acetate, a volumetric flask, and DI water.

Answers

Answer:

You need to do the following conversion to pass from 3M in 250 mL to g of sodium acetate

$3 M (mol/L)*(1L/1000 mL)*(250 mL)*(82.03 g/1 mol)=61.52 g$

Explanation:

First, you need to dissolve 61.52 g of solid sodium acetate (MW 82.03 g/mol) in 200 ml of DI water. Then, using a volumetric flask add water to bring the total volume of the solution to 250 mL.

Cobalt chloride Select one: a. Forms a single hydrate which may be pink or blue
b. Is colorless in the presence of water
c. Does not exist as a hydrate
d. Forms different hydrates which have different colors

Answers

Answer:Forms different hydrates which have different colors

Explanation:

CoCl2 in its anhydrous form is blue in colour. This anhydrous compound could absorb moisture, first forming the purple dihydrate and absorbs more water molecules to form the hexahydrate. Hence various hydrates of cobalt II chloride have different colours as stated above. Equations of reaction for the formation of the two hydrates are attached.

lowly add a slight excess of concentrated (12 M) HCl to your aqueous solution until the pH of the solution is acidic as measured by pH paper.