esratfarin1733 esratfarin1733
  • 12-07-2017
  • Chemistry
contestada

What mass of chromium (cr) is contained in 35.8 g of (nh4)2cr2o7 ?

Respuesta :

dec77cat dec77cat
  • 12-07-2017
M{(NH₄)₂Cr₂O₇}=2A(N)+8A(H)+2A(Cr)+7A(O)

M{(NH₄)₂Cr₂O₇}=252.065 g/mol

M(Cr)=51.996 g/mol

m{(NH₄)₂Cr₂O₇}/M{(NH₄)₂Cr₂O₇}=m(Cr)/2M(Cr)

m(Cr)=2M(Cr)m{(NH₄)₂Cr₂O₇}/M{(NH₄)₂Cr₂O₇}

m(Cr)=2*51.996*35.8/252.065=14.770 g

m(Cr)=14.770 g
Answer Link

Otras preguntas

Please help me to solve these question. Thank you ​
FIRST CORRECT ANSWER PROVIDING AN EXPLANATION WILL GET BRAINLIEST!!! Solve the triangle. Round your answers to the nearest tenth. A. m∠C=63, b=31, c=25.1 B. m∠C
35. The circumference of a circle is 67 inches. What is the area of the circle? A=2
Do you know this it is for social studies
express rational number in standard form: -216/144​
find the value proportion :x : 35:98:60​
Write the interval notation represented by each description below: 1. The set of all numbers less than negative ten. 2. The set of all positive real numbers. 3
Do you know this it is social studies
Explain Macbeth's metaphor about murder
K is between J and M. L is between K and M. M is between K and N. If JN = 14, KM = 4, and JK = KL = LM, what is NL? (do step-by-step fully pls)