Which phenomena does wind cause?

How can I do single replacement equations? For example, Silver metal immersed in potassium nitrate solution to yield. . .

Darina [25.2K]

Single replacement means only 1 will bond. Ag + KNO3 --> AgNO3 + K
Just a rough sketch

5 0

3 years ago

6. How many moles of water would require 92.048 kJ of heat to raise its temperature from 34.0 °C to 100.0 °C? (3 marks)

scoray [572]

Taking into account the definition of calorimetry, 0.0185 moles of water are required.

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

<h3>Mass of water required</h3>

In this case, you know:

Heat= 92.048 kJ
Mass of water = ?
Initial temperature of water= 34 ºC
Final temperature of water= 100 ºC
Specific heat of water = 4.186 $\frac{J}{gC}$

Replacing in the expression to calculate heat exchanges:

92.048 kJ = 4.186 $\frac{J}{gC}$ × m× (100 °C -34 °C)

92.048 kJ = 4.186 $\frac{J}{gC}$ × m× 66 °C

m= 92.048 kJ ÷ (4.186 $\frac{J}{gC}$ × 66 °C)

<u><em>m= 0.333 grams</em></u>

<h3>Moles of water required</h3>

Being the molar mass of water 18 $\frac{g}{mole}$ , that is, the amount of mass that a substance contains in one mole, the moles of water required can be calculated as:

$amount of moles=0.333 gramsx\frac{1 mole}{18 grams}$

<u><em>amount of moles= 0.0185 moles</em></u>

Finally, 0.0185 moles of water are required.

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8 0

3 years ago

Why is a changing ocean temperature of only one or 2 degrees so concerning?

gregori [183]

<span>One degree Celsius indicates the same temperature change as one </span>

7 0

4 years ago

a company has designed a new product and tested the porotype which is the next step in product development

Masja [62]

I’d say market and distribution would be the next step

6 0

3 years ago

2.3 × 10^6 - 1.8 × 10^4

kykrilka [37]

2.282* $10^{6}$

4 0

3 years ago