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JulijaS [17]
3 years ago
8

An electric current can be best conducted by

Chemistry
1 answer:
Licemer1 [7]3 years ago
7 0

Answer:

a metal

Explanation:

metals are good conductors of electricity.

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What mass of solute is contained in 25.4 ml of a 1.56 m potassium bromide solution?
mash [69]
Answer is: mass of <span>potassium bromide is 4.71 grams.
V(KBr) = 25.4 mL </span>÷ 1000 mL/L = 0.0254 L, volume of solution.
c(KBr) = 1.56 mol/L.
n(KBr) = c(KBr) · V(KBr).
n(KBr) = 1.56 mol/L  0.054 L.
n(KBr) = 0.0396 mol, amount of substance.
m(KBr) = n(KBr) · M(KBr).
m(KBr) = 0.0396 mol · 119 g/mol.
m(KBr) = 4.71 g.
M - molar mass.
3 0
3 years ago
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According to the following position vs. Time graph the bicyclist was
julia-pushkina [17]

Answer:

According to the following position vs. Time graph the bicyclist was : D

D. Not moving for the first two seconds, then begin moving at the constant speed.​

Explanation:

Speed = \frac{Distance}{time}

Along Y-axis = Distance in meters

Along X-axis = Time taken in second

  • For first 2 seconds the The object has not changed its position.There is Zero distance covered.So , Speed = 0
  • After 2 second,The Object changed the distance by equal amount in equal interval of time.(Uniform Speed).Hence at each point after 2 second, there is same value speed
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Which of the following molecules contains six bonding electrons?
cestrela7 [59]

Answer:

c2h4 (etthane........

bexcuse it has 6 bond of hydrogen

8 0
3 years ago
For the following nuclear reaction, what was the beginning radionuclide (X)? X → 86Rn222 + 2He4
BigorU [14]
The original radioisotope underwent double-alpha decay, where the original nucleus lost a total of 4 protons and 4 neutrons.

The original radioisotope would have an atomic number of 86+4 (protons), and would have an atomic mass of 222+8 (protons + neutrons). This would make the element Thorium-230, or 90Th230.
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3 years ago
What is the molecular formula for CHON with a molar mass between 165-170
Drupady [299]
Mass for carbon = 12 Mass for hydrogen = 1 Mass for oxygen = 16 Mass for nitrogen = 14 12+1+14+16 = 33 165g / 33g = 5 times all the atoms by 5 C5H5O5N5
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3 years ago
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