2 years ago

What is the first element in the periodic table?

Chemistry

2 answers:

horsena [70]2 years ago

6 0

Answer:

the first element on the table is Hydrogen

Over [174]2 years ago

5 0

Hydrogen is the first element in the periodic table level 1. Can be found on the top left

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andrew-mc [135]

Potassium is the answer

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2 years ago

What are the units of molality? A. mol/kg B. g/mol C. mol/L D. kg/mol

mezya [45]

Answer:

A. mol/kg

Explanation:

hope it helps .

4 0

3 years ago

Read 2 more answers

What do repeated trials in an experiment allow a scientist to do?

Oksana_A [137]

Answer:

Learn from their experiment and know the possible results from trial and error

8 0

3 years ago

You have a friend who has decided to start a facility that generates

uranmaximum [27]

Answer:

should be Anaerobic Digestion

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2 years ago

Determine the electrical work required to produce one mole of hydrogen in the electrolysis of liquid water at 298°K and 1 atm. T

Ostrovityanka [42]

Explanation:

The given data is as follows.

$\Delta H$ = 286 kJ = $286 kJ \times \frac{1000 J}{1 kJ}$

= 286000 J

$S_{H_{2}O} = 70 J/^{o}K$ , $S_{H_{2}} = 131 J/^{o}K$

$S_{O_{2}} = 205 J/^{o}K$

Hence, formula to calculate entropy change of the reaction is as follows.

$\Delta S_{rxn} = \sum \nu_{i}S_{i}_(products) - \sum \nu_{i}S_{i}_(reactants)$

= $[(\frac{1}{2} \times S_{O_{2}}) - (1 \times S_{H_{2}})] - [1 \times S_{H_{2}O}]$

= $[(\frac{1}{2} \times 205) + (1 \times 131)] - [(1 \times 70)]$

= 163.5 J/K

Therefore, formula to calculate electric work energy required is as follows.

$\Delta G_{rxn} = \Delta H_{rxn} - T \Delta S_{rxn}$

= $286000 J - (163.5 J/K \times 298 K)$

= 237.277 kJ

Thus, we can conclude that the electrical work required for given situation is 237.277 kJ.

6 0

3 years ago