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4 years ago

What are middle-latitude cyclones?

Chemistry

1 answer:

dedylja [7]4 years ago

8 0

your answer is B low-pressure systems that cause stormy weather

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What is the mass-action expression Qc for the following chemical reaction:Zn(s)+2Ag+(aq) â‡Œ Zn+2(aq)+2Ag(s) a. [Zn-2]/[Ag-]b. [

sattari [20]

Answer : The expression for reaction quotient will be :

$Q_c=\frac{[Zn^{2+}]}{[Ag^{+}]^2}$

Explanation :

Reaction quotient (Qc) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.

The given redox reaction is :

$2Ag^{+}(aq)+Zn(s)\rightarrow 2Ag(s)+Zn^{2+}(aq)$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

The expression for reaction quotient will be :

$Q_c=\frac{[Zn^{2+}]}{[Ag^{+}]^2}$

7 0

3 years ago

The coinage metals (Group 1B) copper, silver, and gold have specific heats of 0.385, 0.233, and 0.129 J/g-K, respectively. Among

gladu [14]

Answer:

Explanation:

The specific heat capacity is the heat required to raise the temperature of 1kg of a substance by 1oC. Molar heat capacity of a substance is the heat requiredto raise the temperature of 1mole of a substance by 1oC. Molar heat capacity and specific heat capacity both decreases with increase in atomic weight. Increase in atomic weight also means increase in density of the substance.

7 0

4 years ago

Read 2 more answers

If you needed a 1.5 x 1 0-4 M solution of a compound that has a molar mass of 760 g/mol, what would it concentration be in part

motikmotik

Answer:

114 ppm

Explanation:

Data obtained from the question include:

Conc. of compound in mol/L = 1.5×10¯⁴ mol/L

Molar mass of compound = 760 g/mol

Conc. in ppm =..?

Next, we shall determine the concentration of the compound in grams per litre (g/L) . This is illustrated below:

Conc. in mol/L = conc. in g/L / Molar mass

1.5×10¯⁴ = conc. In g/L / 760

Cross multiply

Conc. in g/L = 1.5×10¯⁴ x 760

Conc. in g/L = 0.114 g/L

Next, we shall convert 0.114 g/L to milligrams per litre (mg/L). This is illustrated below:

1 g/L = 1000 mg/L

Therefore, 0.114 g/L = 0.114 x 1000 = 114 mg/L

Finally, we shall convert 114 mg/L to parts per million (ppm). This is illustrated below:

1 mg/L = 1 ppm

Therefore, 114 mg/L = 114 ppm

From the calculations made above,

1.5×10¯⁴ mol/L Is equivalent to 114 ppm.

6 0

3 years ago

How are scented candles made?

marysya [2.9K]

Answer:

The aroma from a lighted scented candle is released through the evaporation of the fragrance from the hot wax pool and from the solid candle itself. Like unscented candles, properly-formulated scented candles will primarily produce water vapor and carbon dioxide when burned

Explanation:

7 0

3 years ago

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Which picture accurately represents the type of orbital occupied by the electrons in a beryllium atom

shtirl [24]

Answer:

i need a picture

Explanation:

..............

6 0

3 years ago