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4 years ago

What is the role of a fuse?

Chemistry

2 answers:

maksim [4K]4 years ago

5 0

B. A fuse is used to break a circuit when there is too much current.

umka21 [38]4 years ago

4 0

The correct answer is B. A fuse is used to break a circuit when there is too much current.
I hope this helps :)

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Compare 1 mole of H2, 1 mole of O2 and 1 mole of F2

likoan [24]

Explanation:

(a) As per the mole concept, one mole of any atom contains $6.022 \times 10^{23}$ atoms or molecules, that is, Avogadro's number of atoms.

Therefore, 1 mole of $H_{2}$ = $2 \times 6.022 \times 10^{23}$ molecules

= $1.2044 \times 10^{23}$ molecules

1 mole of $O_{2}$ = $2 \times 6.022 \times 10^{23}$ molecules

= $1.2044 \times 10^{23}$ molecules

1 mole of $F_{2}$ = $2 \times 6.022 \times 10^{23}$ molecules

= $1.2044 \times 10^{23}$ molecules

Hence, there are equal number of molecules present in the given atoms.

(b) Mass of each given atom will be calculated as follows.

Mass = no. of moles × molar mass

As one molecule of $H_{2}$ contains 2 atoms of hydrogen.

So, mass of 1 mole of $H_{2}$ = $2 mol \times 1.008 g/mol$

= 2.016 g

mass of 1 mole of $O_{2}$ = $2 mol \times 15.999 g/mol$

= 31.996 g

mass of 1 mole of $F_{2}$ = $2 mol \times 18.998 g/mol$

= 37.996 g

Thus, we can conclude that $F_{2}$ has the greatest mass.

8 0

4 years ago

What are the effects of convection currents in our surroundings?

miskamm [114]

Land breeze sea breeze,ventilation,etc

8 0

4 years ago

What law of motion is a small car is eaiser to start than moving a larger car

ASHA 777 [7]

Answer:

Second Law

Explanation:

5 0

3 years ago

Given the NaOH density =1.0698g mL^-1, How many mL of .71M HCl would be required to neutralize 11.33g of 2.03 M NaOH?

SSSSS [86.1K]

The volume in ml of 0.71 M HCl that would be required to neutralize 11.33 g of 2.03 M NaOH is 30.3 ml

calculation

Step 1 : write equation for reaction

NaOH + HCl →NaCl +H₂O

Step 2:find the volume of NaOH

volume=mass/ density

= 11.33 g/ 1.0698 g/ml =10.59 ml

Step 3: find the moles of NaOH

moles = molarity x volume in liters

molarity= 2.03 M=2.03 mol/l

volume in liters =10.59/1000 =0.0106 L

moles = 2.03 M x 0.0106 L =0.0215 moles

step 4: use the mole ratio to determine the moles of HCl

from equation in step 1 , NaOH:HCl is 1:1 therefore the moles of HCl is also 0.0215 moles

Step 5: find volume of HCl

volume= moles/ molarity

molarity =0.71 M =0.71 mol/l

=0.0215 moles /0.71 mol/l=0.0303 L

into ml =0.0303 x 1000=30.3 ml

3 0

3 years ago

What type of reaction is FeS + 2 HCl > FeCl2 + H2S?

schepotkina [342]

Double replacement means a reaction that includes two molecules that each have two different ions. After the reaction, the ions pairs have switched, which is what is shown in the above equation. A single replacement would be a very simple reactions such as: 2Fe(II)S + Ov2^2- -> 2Fe(II)O + 2S^2- A decomposition reaction would be shown as this: 2NaCl -(dissolve in water)> 2Na^+ + Clv2^- A synthesis reaction could be the exact opposite: 2Na^1+ + Clv2^1- -> 2NaCl

8 0

3 years ago