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
1200cm³ of gas
Explanation:
From the analogy provided in this problem,
we know that;
three tablets will produce 600cm³ of gas
This implies that;
1 tablet of the antacid will produce 
= 200cm³
If 1 tablet of the antacid produces 200cm³ of gas,
under the same condition;
6 tablets will produce = 6 x 200 = 1200cm³ of gas
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Boyle's law brainly.com/question/8928288
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Rate = k[A] = first order reaction
<h3>Further explanation</h3>
Given
Rate law
Required
A first-order reaction
Solution
The rate law : equation for the rate of chemical reaction
For reaction
aA + bB ⇒ C
The rate : r = k[A]ᵃ[B]ᵇ
The sum of exponents(a+b) is the reaction order
From the choice :
a. a+b = 2, second order reaction
b. a+b = 3, third order reaction
c. a+b = 4, fourth order reaction
d a+0 = 1, first order reaction
Answer:
Na+Cl2-----NaCl
Explanation:
it's the chemical formula of common salt.
