All categories

2 years ago

(just want to check my answer)

1 answer:

6 0

<span>The answer is B) A precipitate is formed. In the reaction Ni(No3)2)aq) + K2S(aq) -> NiS(s) + 2KNO3(aq), nickel(II) sulfide (NiS) is solid substance as indexed (s) while KNO3 is dissolved in water presented as index (aq). Therefore, if the reaction is successful, a precipitate (the solid substance NiS) will be formed,</span>

You might be interested in

Fe + O2 + H₂O- & Fe2O3 + H₂O. balance por el método de tanteo

AveGali [126]

Answer:

Fe + O2 + H₂O___ Fe2O3 + H₂O.

6Fe+302+H2O______2fe 203+H2O

5 0

2 years ago

How much CaCO3 would have to be decomposed to produce 247 g of CaO

vovangra [49]

441 g CaCO₃ would have to be decomposed to produce 247 g of CaO

<h3>Further explanation</h3>

Reaction

Decomposition of CaCO₃

CaCO₃ ⇒ CaO + CO₂

mass CaO = 247 g

mol of CaO(MW=56 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{247}{56}\\\\mol=4.41$

From equation, mol ratio CaCO₃ : CaO = 1 : 1, so mol CaO :

$\tt \dfrac{1}{1}\times 4.41=4.41$

mass CaCO₃(MW=100 g/mol) :

$\tt mass=mol\times MW\\\\mass=4.41\times 100\\\\mass=441~g$

6 0

2 years ago

Which Two process is it Giving brainliest

Masja [62]

Answer:

C and D!

Explanation:

Don't listen to the other dude above me.

8 0

3 years ago

Laws differ from theories because laws do not provide

o-na [289]

Answer:

C. An explanation

7 0

2 years ago

Which of the following represents the velocity of a light wave?

Softa [21]

Answer:

Explanation:

c = fλ

where" c "is the speed of light ,

• "f" is the frequency of the electromagnetic waves,

• " λ" is its wavelength.

3 0

2 years ago