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a sample of hard water is found to contain 40mg of Ca2+ ions/lit d amount of washing soda [Na2 CO3 ] required to soften 5 lit of sample is [in mg ]

K2 Cr2 O7 is isomorphous to K2SO4 it is found to contain 26.78% Cr cal d atomic mass of Cr
[K=39.10]

d %of H in H2O & H2O2 r resply 11.2% & 5.94% dis llustrates __ law

hope ull ans

7 Answers

1
kamalendu ghosh ·

for q 1 find how much Na2CO3 is required to form CaCO3

1
jb6098 swathi ·

den 4 2nd sum

1
Manas ·

hey for isoamorphos compounds.

atomic wt of compoung A/atomic wt of compound B=ratio of their weights

using that u can get the answer

1
Manas ·

for the third one...... Multiple Proportions law

1
brinda laxmi ·

but d ans given was conservation of mass even i got ur ans by d by wats ur marks in AIEEE

1357
Manish Shankar ·

Third one is law of multiple proportions only

first one can be done as kamalendu said

1
Manas ·

is my method for the 2nd question correct.????????

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