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Finger [1]
3 years ago
8

Giovanni created this chart to study for an exam.

Chemistry
2 answers:
FinnZ [79.3K]3 years ago
4 0

Answer:

The correct answer is "Swap the uses for iron oxide and calcium carbonate".

Explanation:

Giovanni's chart can be summarized as follows:

- Sodium Hydroxide (NaOH): Plastic, soap, and paper production

- Iron oxide (FeO): Toothpastes and antacids

- Calcium chloride (caCl2): Snow removal

- Calcium carbonate (CaCO3): Dark pigment in makeup

It is false to affirm that Iron oxide is used to produce toothpastes and antacids, and that calcium carbonate is used to produce dark pigment in makeup. This chart can be corrected by swapping the uses for iron oxide and calcium carbonate. For its black color, iron oxide is often used to produce dark pigments, while calcium carbonate is used in antacids and its abrasive properties are used in toothpastes.

I am Lyosha [343]3 years ago
3 0

Answer:

b- swap the uses for iron oxide and calcium carbonate.

Explanation:

just took the test. good luck!

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Object A at 40.°C and object B at 80.°C are placed in contact with each other. Which statement describes the heat flow between t
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Answer: The correct option is 2.

Explanation: Heat flow is defined as the transfer of energy from hotter object to cooler object when two objects are kept together at different temperatures. As the energy remains conserved, so the heat flow will take place until the equilibrium is attained.

In the above asked question, Object A is at 40° C and Object B is at 80° C.

Object B is at higher temperature, so the heat flow will take place from Object B to Object A.

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4 years ago
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3 years ago
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A mole of oxygen and a mole of hydrogen (at STP) have all of the following in common EXCEPT
Drupady [299]

Answer:

Root mean squared velocity is different.

Explanation:

Hello!

In this case, since we have a mixture of oxygen and nitrogen at STP, which is defined as a condition whereas T = 298 K and P = 1 atm, we can infer that these gases have the same temperature, pressure, volume and moles but a different root mean squared velocity according to the following formula:

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Mrrafil [7]

Answer:

The law of conservation of mass was obeyed since some of the mass evaporated while the cookies were baking.

Explanation:

Maria mixes water, flour, sugar, baking powder, butter and chocolate chips and then measures the mass of her ingredients.

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Final mass = 845 g

All these information are not of any great help.

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In this process of baking, considering the cookies as our system, they never formed a closed system. Hence were free for evaporation.

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4 years ago
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