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2 years ago

What ions are formed when naoh is dissolved in water?.

Chemistry

1 answer:

valentina_108 [34]2 years ago

7 0

Answer:

When sodium hydroxide (NaOH) dissolves in water, it separates into positively - charged sodium ions (cations) and negatively - charged hydroxide ions (anions).

Hope this helped.

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A hypothesis is made before the experiment is conducted. <br> True or fasle

Viefleur [7K]

It should be at beginning. A hypothesis is called an educated guess of what might happen in the experiment.

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2 years ago

Connie was making sodium chloride by adding an acid to an alkali. She followed the progress of the reaction with a pH sensor. At

Misha Larkins [42]

⇒Answer:

When the pH sensor hits pH=7.

⇒Explanation:

Because pH=7 is the indicator that the acid and alkali have been neutralized.

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2 years ago

Type the correct answer in the box. Use numerals instead of words.

Murrr4er [49]

Answer:

The amount of energy transferred to the coin is 28.5 joules.

Explanation:

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2 years ago

Read 2 more answers

1. An electric power plant uses energy from burning coal to generate steam at 450 °C. The plant is cooled by 20 °C water

kap26 [50]

Answer:

Explanation:

Efficiency of the electric power plant is $e=1-\frac{T_{2}}{T_{1}}$

Here Temperature of hot source $T_{1} = 450^{o}C=450+273=723 K$

and Temperature of sink $T_{1} = 20^{o}C=20+273=293 K$

Hence the efficiency is $e=1-\frac{293}{723}=0.5947=59.47%$

Now another formula for thermal efficiency Is

$e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

Here QI is the of heat taken from source 100 MJ ; Q2 of heat transferred to the sink (river) to be found

W is the of work done and W = QI -Q2

Hence From $e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

$W=e(Q_{1})=(0.5947)(100)=59.47MJ$

Hence the of heat transferred to the river Is $Q_{2} -W = (100 -59.47=40.53$

6 0

3 years ago

I don't know which one it is!

ch4aika [34]

It's what you put :)
ΔH is the distance from the reactants (which would be E), to the products (which would be G or D)

4 0

3 years ago