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3 years ago

What is the answer of number 3

Chemistry

2 answers:

Butoxors [25]3 years ago

5 0

Answer:

TRUE!!!

Explanation:

The transfer of thermal energy is called heat. Therefore, a heating system is a system for the transfer of thermal energy. Regardless of the type of heating system in a home, the basic function is the same: to produce thermal energy and transfer it to air throughout the house.

ipn [44]3 years ago

4 0

Answer:

true

Explanation:

because the thermal energy itself is heating. that's why we use thermal energy to transfer heat.

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When H2SO4 is added to PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If

Nookie1986 [14]

Answer:

$n_{I^-}=3.11x10^{-4}molI^-$

Explanation:

Hello,

In this case, the undergoing chemical reaction is shown below:

$H_2SO_4(aq)+PbI_2(aq)\rightarrow PbSO_4(s)+2HI(aq)$

Thus, we obtain 0.0471 g of lead (II) sulfate, the iodide ions in the original solution are computed below by stoichiometry, taking into account that into 1 mole of lead (II) iodide there are 2 moles of iodide ions:

$n_{I^-}=0.0471gPbSO_4*\frac{1molPbSO_4}{303.26gPbSO_4}*\frac{1molPbI_2}{1molPbSO_4}*\frac{2molI^-}{1molPbI_2} \\n_{I^-}=3.11x10^{-4}molI^-$

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3 0

3 years ago

Help please. ASAP

Stella [2.4K]

Answer:

COol

Explanation:

Answer A

7 0

3 years ago

A mass of one centigram is a mass of A 100g B 10 g C .01 g D 1000 g

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Mass of 1 centigram is equal to 0.01 grams
So, option C is your answer!

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How are acids and bases defined by arrhenius?

Lilit [14]

As defined by Arrhenius: An Arrhenius acid is a substance that dissociates in water to form hydrogen ions (H+). ... An Arrhenius base is a substance that dissociates in water to form hydroxide (OH–) ions. In other words, a base increases the concentration of OH– ions in an aqueous solution.

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tino4ka555 [31]

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