4.0 g of sodium hydroxide in 250 cm³ of solution contains?

CRIMHAZ

3 years ago

OR

n=m/M
remembering naoh =
na=23
O=16 nd h=1
adding dem 2geda will giv. 40

so molar mass (M) =40
n=4/40
n=0.1

also n= cv/1000

0.1= 250C/1000
0.1*1000=250C
100=250C

C=100/250 :. C =0.4

Alisha101

2 years ago

replying to Excel, C is concentration in mol/ dm^3 that is molar concentration

biebele1

2 years ago

c is molar concenteration

Melody16

2 years ago

The solution clearly states 0.4moles per dm³ as the answer and the selected option is C

Ejikemebel

1 year ago

or
mole= mass/molarmass
4g/40g = 0.10mol
0.10 x 1000/250 = 0.4