All categories

3 years ago

Choose ALL TRUE statements about calorimetry from the choices below:

Chemistry

1 answer:

Ostrovityanka [42]3 years ago

6 0

Answer:

True statment

2) Styrofoam would make a good calorimeter

3) Insulating material would make a good calorimeter

Explanation:

The calorimeter is one which is insulated that is which will not absorb or let the heat to escape from it. the calorimeter is used to measure the heat change during a process so if it will allow to exchange heat with surrounding it will deviate the readings or observence.

Copper is a good conductor of heat so we cannot use it make a calorimeter.

Hence

1) Copper would make a good calorimeter : False

2) Styrofoam would make a good calorimeter: True

Styrofoam is a bad conductor or insulator so it can be and it is used for calorimeter.

3) Insulating material would make a good calorimeter : True

4) A good calorimeter should easily absorb heat : false

You might be interested in

how many moles of potassium hydroxide are needed to completely react with 1.73 miles of aluminum sulfate according to the follow

Masteriza [31]

<h3>Answer; </h3>

=10.38 moles KOH

<h3>Explanation;</h3>

The balanced equation.

6KOH + Al2(SO4)3 --> 3K2SO4 + 2Al(OH)3

From the equation;

1 mole of aluminum sulfate requires 6 moles of potassium hydroxide.

Moles of Aluminium sulfate; 1.73 moles

Moles of KOH;

1 mol Al2(SO4)3 : 6 mol KOH = 1.73 mol Al2(SO4)3 : x mol KOH

Thus; x = (6 × 1.73)

=10.38 moles KOH

4 0

3 years ago

Read 2 more answers

which of the following parts of a circuit would be considered a load ? Justify your answer by explaining your choices • light •

QveST [7]

The answer to the question given above is letter A. Light

Light is considered a load of the parts of a circuit. The load in a circuit can be any electrical device that converts electrical energy into other usable forms of energy such as a light bulb.

>>Energy sources include batteries and generating stations
>>switch-is used in electric circuits to allow the circuit to be turned on and off.

6 0

3 years ago

How many grams of oxygen would be needed to completely react with 18 grams of methane (CH4)?

S_A_V [24]

Answer:

35.91 grams of oxygen

Explanation:

6 0

3 years ago

Choose the best statement of the octet rule from those listed below atoms lose 8 electrons to become valent atoms lose 8 electro

Mnenie [13.5K]

Answer:

atoms tend to react in order to gain 8 valence electrons

Explanation:

The octet rule describes the tendency of atoms of elements to react in order to have eight electrons in their valence shell. This is because having eight valence electrons confers stability to the atoms of these elements in the compounds they form.

The octet rule only does not apply to the transition elements or the inner transition elements as only the s and p electrons are involved. the electronic configuration in atoms having an octet is s²p⁶.

For example, sodium atom has one valence electron in its valence shell but a complete octet in the inner shell; it will react with chlorine atom which has seven valence electrons to form a stable compound, sodium chloride by donating its one valence electron in order to have an octet. Similarly, the chlorine atom will then have an octet by accepting the one electron from sodium atom.

7 0

3 years ago

Can someone help.? thanks :)

laila [671]

Answer:

1. Equation: 2x + 3 = 9x - 11

2. Each row has 2 chairs

Explanation:

The variable x represents the number of chairs in each row.

1. She can form 2 rows of a given length with 3 chairs left over.

Thus, she has:

number of rows number of chairs in chairs number of chairs

each row left over she has

2 x 3 2x + 3

2. She can form 9 rows of the same length if she gets 11 more chairs.

That means that she is short in 11 chairs to have 9x chairs, or that she has 11 less chairs than 9x chairs. Then she has:

9x - 11

3. Equation:

Then, number of chairs she has is 2x + 3 and, also, 9x - 11, which allows to set the equation:

2x + 3 = 9x -11

4. Solve the equation:

9x - 2x = 3 + 11

7x = 14

x = 2

Therefore, each row has 2 chairs, and she has 2x + 3 = 4 + 3 = 7 chairs.

4 0

3 years ago