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3 years ago

What element in the second period has the largest atomic radius?

Chemistry

1 answer:

madreJ [45]3 years ago

3 0

Answer:

b. lithium

Explanation:

furthest to the left in second period

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Thermal decomposition of magnesium nitrate and magnesium hydroxide <br><br>

iragen [17]

Explanation:

hope it will help you. Wishing a nice day. enjoy with your answer

8 0

2 years ago

How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909

makkiz [27]

Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atmosphere respectively.

1 mole of every gas occupy volume at STP = 22.4 L

The balanced chemical reaction is:

$2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)$

3909.9 kJ of of energy is produced by = $15\times 22.4=336L$

100 kJ of oxygen gas are needed to produce = $\frac{336}{3909.9}\times 100=8.59L$

7 0

3 years ago

Due to the fact that ionic compounds have strong intermolecular forces they are __________ at room temperature.

MrMuchimi

The correct answer should be solids

3 0

2 years ago

If someone consumes 22 g of sodium chloride per day, what mass (in grams) of sodium does that person consume? Sodium chloride is

kompoz [17]

Answer:

Mass of sodium, the person daily consume = 8.58 g

Explanation:

Given that:-

sodium chloride is 39% sodium by mass which means that:-

100 g of sodium chloride contains 39 g of sodium

Also,

1 g of sodium chloride contains 0.39 g of sodium

So, Given mass = 22 g

22 g of sodium chloride contains $0.39\times 22$ g of sodium

<u>Mass of sodium, the person daily consume = 8.58 g</u>

4 0

3 years ago

Anouk does 150 J of work using a hammer to pull a nail out of a piece of wood, and the hammer does 105 J of work on the nail. Wh

astraxan [27]

The efficiency of any machine is given by:

efficiency = output obtained / input given

Substituting the values,
Efficiency = 105 / 150
Efficiency = 0.7

Converting this to a percentage, the efficiency of the hammer is 70%.
This is a fairly high efficiency, and this is due to the fact that the hammer is a simpler machine. The more complex a machine is, the greater are the losses in it due to friction, meaning there is a lower efficiency.

6 0

3 years ago

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