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3 years ago

Help me!!!!!!! A. 2 B. 3 C.4 D.6

Chemistry

1 answer:

riadik2000 [5.3K]3 years ago

3 0

Answer:

A. 2

Explanation:

You need to balance the other side so the reactants and products are equal.

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As a car moves, the engine converts energy. The system consists of: the car (including engine and fuel), Earth, and surface of t

katen-ka-za [31]

Answer:

I believe your answer will be 3--

As the fuel burns, chemical reactions occur within the fuel, breaking up molecules, forming new molecules, and releasing energy. The energy is released as heat, and allows parts of the engine to move. The chemical energy is transformed into thermal energy.

Explanation:

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7 0

3 years ago

Iron is found in Earth's crust as several iron compounds. Calculate the mass in kilograms of the amount of each of the following

notka56 [123]

The mass of hematite that contains 8.0×10³ kg of iron is 2.29 × 10⁴ kg.

Iron ores refers to minerals in which iron occur in combined form found in the earth's crust.

Some ores of iron include:

hematite,
magnetite,
limonite, and
siderite.

Molar mass of hematite, Fe₂O₃ = 160 g/mol

Molar mass iron = 56 g/mol

Percent mass of iron in hematite = 56/160 = 35%

The mass of hematite that contains 8.0×10³ kg of iron = 8.0 × 10³kg/0.35 = 2.29 × 10⁴ kg.

Therefore, the mass of hematite that contains 8.0×10³ kg of iron is 2.29 × 10⁴ kg.

Learn more about iron ores at: brainly.com/question/4693242

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3 0

2 years ago

In the chemical stockroom, there is a 0.500 L bottle filled with 2.30 M CuSO4 solution. How many moles of CuSO4 are in the bottl

Maru [420]

Mfffffffffffffff the answer is b

7 0

2 years ago

Determine how many grams of silver would be produced, if 12.83 x 10^23 atoms of copper react with an excess of silver nitrate. G

likoan [24]

<u>Answer:</u> The amount of silver produced in the given reaction is 459.63 g.

<u>Explanation:</u>

According to mole concept:

1 mole of an atom contains $6.022\times 10^{23}$ number of atoms.

For the given chemical equation:

$Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag$

By Stoichiometry of the reaction:

1 mole of copper produces 2 moles of silver.

This means that, $6.022\times 10^{23}$ number of atoms of copper produces $2\times 6.022\times 10^{23}$ number of atoms of silver.

So, $12.83\times 10^{23}$ number of atoms of copper will produce = $\frac{2\times 6.022\times 10^{23}}\times 12.83\times 10^{23}=25.66\times 10^{23}$ number of atoms of silver.