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3 years ago

An occluded front moves over farmland that has been experiencing drought conditions.

2 answers:

7 0

Drought means a shortage of water. The answer is either c or d. Since there is no water/rain during a drought those factors can instantly tell us that it’s not a or b. So it is c or d

cupoosta [38]3 years ago

6 0

Should be B. An extended period of rain

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Will BeCO3 Hydrolyze in aqueous medium?. If so how?... very urgent..

irinina [24]

Answer:

BeCO3 will hydrolyze in an aqueous medium, yielding a basic solution.

Explanation:

In accord with the rules of salt hydrolysis, the cation $Be^{2+}$ can hydrolyze. The anion $CO_{3} ^{2-}$ can also hydrolyze, given that the resulting conjugate acid is weak.

Given that both ions hydrolyze, the Ka (acid ionization constant) and Kb (Base ionization constant) of each reactant (or product [that is, the conjugate acid and base for each ion]) must be compared.

Using the web (hopefully some sort of reference table has been provided to you):

Ka (for Be^2+) = $3 * 10^{-7}$

Kb (for CO3^2-) = $\frac{Kw (water)}{Ka (HCO3)}$

= $\frac{1*10^{-14}}{4.7*10^{-11}}$

= $2.1 * 10^{-4}$

The Kb > Ka, so the solution will be basic.

Hope this helps! My apologies if this answer is incorrect, I have not done this type of problem in a while.

7 0

1 year ago

If you have 97 moles of pb (NO3)2 you can produce moles of KNO3

ladessa [460]

The given equation is already balanced. We can use the stoichiometric ratio given by the equation to find how many moles of KNO3 are produced. According to the equation, for every mole of Pb(NO3)2, 2 moles of KNO3 are produced.

$97molPb\left(NO_3\right)_2\cdot\frac{2molKNO_3}{1molPb\left(NO_3\right)_2}=194molKNO_3$

It means that 194moles of KNO3 are produced.

4 0

1 year ago

This gas law works only if temperature is recorded in ———— units

Vsevolod [243]

Answer:

Kelvin

Explanation:

Gas laws re the laws that relates properties of gases such as pressure, temperature and volume at different conditions.
Gas laws includes, Boyle's law, Charles law, grahams law and pressure law among others.
Temperature is one of the quantity of gases explained by gas laws. For gas laws to work, temperature should always be in Kelvin. Therefore, when given temperature in degrees, it is converted to Kelvin by adding 273, that is °C + 273 = K.

8 0

3 years ago

Which of the following is not a property of water? Hydrogen bonding causes a high surface tension. Hydrogen bonds exist only in

vlada-n [284]

Answer:

water can dissolve ionic and polar molecules.

6 0

3 years ago

Which of the following is true of liquids and solids?

gayaneshka [121]

The answer is D. This is because liquids take up the shape of the container they are in, so it is never definite. Where as solids stay the same shape.

3 0

4 years ago