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3 years ago

What instruments can be used to measure volumes of liquids?

Chemistry

2 answers:

TiliK225 [7]3 years ago

8 0

Graduated cylinders or beakers.

alexandr1967 [171]3 years ago

5 0

Graduated Cylinders, Measuring Cups, Measuring Spoons, Beakers, Flasks

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4.41 g of propane gas (C3H8) is injected into a bomb calorimeter and ignited with excess oxygen, according to the reaction below

gayaneshka [121]

Answer : The heat of the reaction is -221.6 kJ

Explanation :

Heat released by the reaction = Heat absorbed by the calorimeter

$q_{rxn}=-q_{cal}$

$q_{cal}=c_{cal}\times \Delta T$

where,

$q_{rxn}$ = heat released by the reaction = ?

$q_{cal}$ = heat absorbed by the calorimeter

$c_{cal}$ = specific heat of calorimeter = $97.1kJ/^oC=97100J/^oC$

$\Delta T$ = change in temperature = $(T_{final}-T_{initial})=(27.282-25.000)=2.282^oC$

Now put all the given values in the above formula, we get:

$q_{cal}=(97100J/^oC)\times (2.282^oC)$

$q_{cal}=221582.2J=221.6kJ$

As, $q_{rxn}=-q_{cal}$

So, $q_{rxn}=-221.6kJ$

Thus, the heat of the reaction is -221.6 kJ

6 0

3 years ago

Look at the picture below. Name the isotope.

Aleks [24]

Answer:

carbon-13

Explanation:

6 0

3 years ago

Cuantos miles de sulfato de calcio están en 60 gramos de sustancia

seropon [69]

No hay suficiente informacion.

8 0

3 years ago

What process is the method by which a neutral object obtains an electrical charge? A) convection B) discharge C) induction D) ra

Afina-wow [57]

The answer is C.) induction

3 0

3 years ago

Read 2 more answers

What mass of silver chloride can be produced from 1.30 L of a 0.245 M solution of silver nitrate? The reaction described in Part

Gnoma [55]

Answer:

Explanation:

Given parameters:

Volume of AgNO₃ = 1.3L

Molarity or concentration AgNO₃ = 0.245M

Unknown:

Mass of AgCl produced = ?

Solution:

To solve this problem, we have to work from the known compound to the unknown one using the mole concept.

The known compound is the one that we can obtain the value of the number of moles from. Here it is the given AgNO₃ that can furnish us with this piece of information;

Now let us establish the balanced reaction equation;

2AgNO₃ + CaCl₂ → 2AgCl + Ca(NO₃)₂

Now;

Find the number of moles of AgNO₃;

Number of moles of AgNO₃ = concentration x volume

= 1.3 x 0.245

= 0.32moles

From the balanced reaction equation;

2 mole of AgNO₃ produced 2 moles of AgCl

0.32 moles of AgNO₃ will produce 0.32moles of AgCl

Now that we know the number of moles of the AgCl, we can find the mass;

Mass of AgCl = number of moles x molar mass

Molar mass of AgCl = 107.9 + 35.5 = 143.4g/mol

Mass of AgCl = 0.32 x 143.4 = 45.89g

5 0

3 years ago