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3 years ago

Select all the correct answers.

Chemistry

1 answer:

Alborosie3 years ago

8 0

Answer:

3) The amount of matter within the system remains the same

5) The cycle has a well-defined starting and stopping point.

Explanation:

A closed system is a system that the boundaries of a system cannot be passed by either matter or energy.

Hence, generalisations can be made based on a closed system and the law of conservation of mass which states that matter can neither be created nor destroyed but can only change form.

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A factory produces 5,000,000 Ibuprofen tablets to fill an order. The bottle chosen for packaging holds 250 tablets. If the activ

vivado [14]

Answer:2,204 pounds Ibuprofen must the factory use to fill this order

Explanation:

Amount of Ibuprofen in 1 tablet = 200 mg

Amount of Ibuprofen in 5,000,000 tablet = $5,000,000\times 200mg=10^9 mg$

1 g = 1000 mg

Grams of Ibuprofen = $10^{6} g$

1 g = 0.002204 pounds

Pounds of Ibuprofen required to fulfill the order:

$10^6\times 0.002204 pounds=2,204 pounds$

2,204 pounds Ibuprofen must the factory use to fill this order

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3 years ago

Explain how science can help people save resources such as coal

klio [65]

Science can create new forms of energy that dont use coal for example; hydroelectricity, wind power, solar power, steam power, fusion, fission, etc.
Or science can create more efficient ways to use the resources.

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4 years ago

Read 2 more answers

A substance is composed of only one kind of Adam and can't be separated into simpler substances are converted into it another su

Zarrin [17]

Answer:

Element

Explanation:

An element is substance that is composed of only one kind of atom and can not be separated into simpler substances or converted into another substance by chemical processes.

Chemical elements are found in the periodic table. Examples of chemical elements include; sodium potassium, phosphorus, hydrogen etc.

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3 years ago

Please help with this question

mixas84 [53]

Answer:this Covalent bond

Explanation:Covalent bond involves a pair of electrons being shared between atoms.

Hope this helps!

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3 years ago

NH4NO3 + Na3PO4 → (NH4)3PO4 + NaNO3

Papessa [141]

Based on the equation of the reaction and the data provided,

NH4NO3 is the limiting reactant
mass of Na3PO4 left is 29.375 g
18.75 g of (NH4)3PO4 is produced
31.875 g of NaNO3 is produced

<h3>What are limiting reactants?</h3>

A limiting reactant is a reactant which is used up in a reaction after which the reaction stops.

In the given reaction:

3 NH4NO3 + Na3PO4 → (NH4)3PO4 + 3 NaNO3

The limiting reactant is determined from the stoichiometry of the eqaution.

Moles of reactant = mass/molar mass

Molar mass of NH4NO3 = 80 g/mol

Molar mass of Na3PO4 = 165 g/mol

Molar mass of (NH4)3PO4 = 150 g/mol

Molar mass of NaNO3 = 85 g/mol

From the equation of the reaction, 240 g (3 × 80) of NH4NO3 is required to react with 165 g of Na3PO4

There are only 30.0 g of NH4NO3 reacting with 50.0 g of Na3PO4

30 g of Na3PO4 will react with 30 × 165/240 = 20.625 g of Na3PO4

Therefore, NH4NO3 is the limiting reactant

Na3PO4 is the excess reactant

mass of Na3PO4 left = 50 - 20.625

mass of excess reactant left = 29.375 g

moles of NH4NO3 in 30 g = 30/80 = 0.375 moles

3 moles of NH4NO3 produces 1 mole of (NH4)3PO4

0.375 moles of NH4NO3 will produce 0.375 × 1/3 = 0.125 moles of (NH4)3PO4

mass of 0.125 moles of (NH4)3PO4 = 0.125 × 150

mass of (NH4)3PO4 produced = 18.75 g of (NH4)3PO4

3 moles of NH4NO3 produces 3 moles of NaNO3

0.375 moles of NH4NO3 will produce 0.375 moles of NaNO3

mass of 0.375 moles of NaNO3 = 0.375 × 85

mass of NaNO3 produced = 31.875 g of NaNO3

Learn more about limiting reactant at: brainly.com/question/24945784

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2 years ago