The correct answer is A. The magnetic field is strongest at the north pole and the south pole of a bar magnet. At the poles, the magnetic field is equally strong while the force is weaker at the middle of the bar. The field lines are closely packed at each pole and it gets wider as the lines get further from the pole.

4 0

3 years ago

!!!Need answer for chem homework ASAP PLS !!!!

stealth61 [152]

Answer:

The answer to your question is: kc = 6.48

Explanation:

Data

Given Molecular weight

CaO = 44.6 g 56 g

CO₂ = 26 g 44 g

CaCO₃ = 42.3 g 100 g

Find moles

CaO 56 g ---------------- 1 mol

44.6 g -------------- x

x = (44.6 x 1) / 56 = 0.8 mol

CO₂ 44 g ----------------- 1 mol

26 g ---------------- x

x = (26 x 1 ) / 44 = 0.6 moles

CaCO₃ 100 g --------------- 1 mol

42.3g -------------- x

x = (42.3 x 1) / 100 = 0.423 moles

Concentrations

CaO = 0.8 / 6.5 = 0.12 M

CO₂ = 0.6 / 6.5 = 0.09 M

CaCO₃ = 0.423 / 6.5 = 0.07 M

Equilibrium constant = $\frac{[products]}{[reactants]}$

Kc = [0.07] / [[0.12][0.09]

Kc = 0.07 / 0.0108

kc = 6.48

7 0

3 years ago

A double replacement reaction is a reaction in which one element replaces a similar element within a compound. (2 points)

emmainna [20.7K]

Answer:

False

Explanation:

youre welcome

3 0

3 years ago