4 years ago

A color change happens during an experiment mixing two liquids. Is this a

Chemistry

1 answer:

padilas [110]4 years ago

3 0

Answer:

Explanation:

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Reactant A contains 40 J of energy, and Reactant B contains 33.5 J of energy. The reactants combine to form product AB, which co

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Answer:

Explanation:

Energy is absorbed because the product has more energy than the reactants have.

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3 years ago

A student wants to prepare a solution of cobalt(II) fluoride with a known molarity.

swat32

Answer:

$\large \boxed{\text{1.52 g}}$

Explanation:

1. Calculate the moles of CoF₂ needed

$n = \text{0.100 L} \times \dfrac{\text{0.157 mol}}{\text{1 L}} = \text{0.0157 mol}$

2. Calculate the mass of CoF₂

$m = \text{0.0157 mol} \times \dfrac{\text{96.93 g}}{\text{1 mol}} = \text{1.52 g}\\\\\text{ The student must measure out $\large \boxed{\textbf{1.52 g}}$ of cobalt(II) fluoride}$

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4 years ago

How many molecules are in<br> 6.0 moles of methane (CH4)?

katen-ka-za [31]

Answer:

${ \tt{1 \: mole = 6.02 \times {10}^{23} \: molecules }} \\ { \tt{6.0 \: moles = (6 \times 6.02 \times {10}^{23}) \: molecules }} \\ = { \bf{3.612 \times {10}^{24} \: molecules}}$

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3 years ago

Which part of the electrochemical cell allows the back-and-forth passage of ions from the cathode to the anode? the half cell

olganol [36]

Answer is "The salt Bridge"

Explanation:
During the spontaneous reaction in Voltaic Cell, the balance of ions get disturb due to increase in concentration of negative charge in one half cell and positive charge in another. In order to keep balance the charges in cell, concentration of ions on both sides and overall neutrality of the system, a U-shape tube filled with inert electrolyte is connected to both half cells. The electrolyte migrates in such a way that the charges of solution in cells keep constant.

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3 years ago

Which is another word for 10 meters in the metric system?

kotegsom [21]

Answer:

Dekameter

Explanation:

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3 years ago