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3 years ago

Review the poster.

Chemistry

2 answers:

nataly862011 [7]3 years ago

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Please mark Brainliest!!! have a good day/night!

weeeeeb [17]3 years ago

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A. A poster that features brief sentences conveys urgency and simplifies content.

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Spectator ions when FeSO4 and PbNO32 react

sweet [91]

Sorry I thought I had the answer!

Explanation:

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3 years ago

commercial cold packs consist of solid NH4NO3 and water. In a coffee-cup calorimeter, 5.60g NH4NO3 is dissolved in 100g of water

fgiga [73]

Answer:

-1.37 kJ/mol

Explanation:

The expression for the calculation of the enthalpy of dissolution of [tex[NH_4NO_3[/tex] is shown below as:-

$\Delta H=m\times C\times \Delta T$

Where,

$\Delta H$ is the enthalpy of dissolution of [tex[NH_4NO_3[/tex]

m is the mass

C is the specific heat capacity

$\Delta T$ is the temperature change

Thus, given that:-

Mass of ammonium nitrate = 5.60 g

Specific heat = 4.18 J/g°C

$\Delta T=17.9-22.0\ ^0C=-4.1\ ^0C$

So,

$\Delta H=-1.25\times 4.18\times 3.9\ J=-95.9728\ J$

Negative sign signifies loss of heat.

Also, 1 J = 0.001 kJ

So,

$\Delta H=-0.096\ kJ$

Also,

Molar mass of [tex[NH_4NO_3[/tex] = 80.043 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{5.60\ g}{80.043 \ g/mol}$

$Moles= 0.06996\ mol$

Thus, $\Delta H=-\frac{0.096}{0.06996}\ kJ/mol=-1.37\ kJ/mol$

6 0

4 years ago

As the depth of the ocean increases the amount of sunlight and water temperature will..

Harlamova29_29 [7]

Answer:

Decrease

Explanation:

The lower you go, the colder because the sun can't reach lower levels of the ocean.

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3 years ago

Read 2 more answers

How many chlorine atoms will correctly complete the data table ?

Elina [12.6K]

Answer:

B. 2

Explanation:

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3 years ago

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Give the complete balanced equation for the reaction that occurs when lithium carbonate (LiCO3) is heated

Eva8 [605]

LiCO3-> LiO+ CO2
It is already balanced as there is one Li on each side, one C on each side and three Os on each side.

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3 years ago