Carbonate compounds have a negative valency (because they contain oxygen), so NaCO3 has a negative valency (it’s a negatively-charged ion) which makes it basic or alkaline.

8 0

4 years ago

What are the correct half reactions for the following reaction: Cu2+ + Mg -> Cu + Mg2+

Sunny_sXe [5.5K]

Answer:

Cu2 + 2Mg-> 2Cu+ Mg2

Explanation:

Balance the equation and make sure both the reactant and the products are the same

Hope it will be helpful

4 0

4 years ago

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Which term defines the following: moles of solute mass of solvent in kg?

kramer

The answer is B. molality

7 0

3 years ago

Consider the following chemical equilibrium: CaCO3 (s) Cao (s)+cO2 (g) Now write an equation below that shows how to calculate K

True [87]

Answer:

$Kc = Kp/(RT)$

Explanation:

Let's consider the following chemical equilibrium:

CaCO₃(s) ⇄ CaO(s) + CO₂(g)

Given the pressure equilibrium constant Kp = pCO₂

We can calculate the concentration equilibrium constant (Kc) using the following expression.

$Kc = Kp/(RT)^{\Delta n(g)}$

where,

R is the ideal gas constant

T is the absolute temperature

Δn(g) = moles of gaseous products - moles of gaseous reactants = 1 - 0 = 1

The expression for this reaction is:

$Kc = Kp/(RT)$

4 0

3 years ago