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G-12 ဓာတုဗေဒဘာသာရပ် စစ်ဆေးအကဲဖြတ်ခြင်း (Official)

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An aqueous solution of NH4CN is _____.

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Which statements describe properties of transition elements?

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The Ka and pH values of four acids are given in the following:

HA (Ka = 2.0 x 10-5 pH = 2.1)

HB (Ka = 4.0 x 10-5, pH = 2.3)

HC (Ka = 1.0 x 10-5, pH = 2.2)

HD (Ka = 1.3 x 10-5, pH = 2.4)

Based on this data, the strongest acid is:

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Which of the following is not an amphiprotic species?

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When using the Arrhenius model, what types of ions indicate that a compound is a base?

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Predict the effect of decreasing concentration of CH4 on the following equilibrium.

C(s) + 2H2(g) CH4(g)

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What is the value of Kw at 298 K?

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If an acid is split on the laboratory bench, which of the following substances should be added to it in order to neutralize it?

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A reaction is given by aA + bB  cC + dD. How do you represent an equilibrium constant?

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The pressure of a gas mixture at a given temperature is determined by __________ in a given volume.

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