Suppose you begin with 1.50~g of the hydrate copper(II)sulfate · x-hydrate (CuSO4· x H2O), where x is an integer. After dehydration you find that you are left with 0.96~g of the an-hydrate CuSO4. What is the unknown integer x? Round your answer to the nearest integer, enter only an integer. Suppose you begin with of the hydrate KAl(SO4)2 · 12H2O. After dehydration you find that you are left with 3.0~g of the an-hydrate KAl(SO4)2. How many grams did you start with? Write the value to the correct number of significance figures.

Question

22-07-2016
Chemistry

contestada

Suppose you begin with 1.50~g of the hydrate copper(II)sulfate · x-hydrate (CuSO4· x H2O), where x is an integer. After dehydration you find that you are left with 0.96~g of the an-hydrate CuSO4. What is the unknown integer x? Round your answer to the nearest integer, enter only an integer. Suppose you begin with of the hydrate KAl(SO4)2 · 12H2O. After dehydration you find that you are left with 3.0~g of the an-hydrate KAl(SO4)2. How many grams did you start with? Write the value to the correct number of significance figures.

Respuesta :

Otras preguntas

At which temperature would it take the longest for the smell of cologne that someone is wearing to reach you? A. 50oC B. –10oC C. 100oC D. 0oC

graph equation by plotting 3 points. 2y=-3x+2

Which logarithmic graph can be used to approximate the value of y in the equation 4^y = 5? The graph of function f of x equals negative log base 4 of x The g

In applying the high-low method, what is the fixed cost? month miles total cost january 80,000 $144,000 february 50,000 120,000 march 70,000 141,000 april 90,00

Mrs. Habib has 46.25 feet of border for a bulletin board for her classroom. the board is 37.5 feet tall and 8.3 feet wide. how many feet of border will Mrs habi

Read Emily Dickinson’s “’Twas Later When the Summer Went.” Which two lines contain examples of alliteration?

PLZ HELP ME IM GONN FAIL ITS LATE how did southerners view slavery differently after the vesey plot and the turner revolt? a. southerners became less willing t

Predict which species of finch would be most likely to survive if the weather on the galapagos islands gradually chamged and the seeds

Please solve ASAP. 30PTS + Brainliest

A snack cart sells lemonade for$2 and hot dogs for $5. The vendor sold 86 items today for a total of $330. Which equation is true?

meerkat18 meerkat18 · Answer 1 · 2016-07-26T09:24:00+02:00

1. The molar mass of CuSO4 is 159.61 g/mol. Given that there is only 0.96 g left after dehydration, the number of moles CuSO4.xH2O is,
m = 0.96 g / 159.61 g/mol = 6.014 x 10^-3
Thus,
(6.014 x 10^-3 moles)(156.61 + x(18)) = 1.50
The value of x is 5.15. For whole numbers, x is 5.

2. The number of moles of KAl(SO4) is 0.0116 moles. The molar mass of the given hydrate is 474.388 g/mol. Thus, the initial mass is 0.0116 moles x 474.388 g/mol which is equal to 5.51 g.