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3 years ago

Which of the following has only one loop for a current to flow through A) parallel B)series

Chemistry

2 answers:

brilliants [131]3 years ago

6 0

Answer: Option (B) is the correct answer.

Explanation:

A circuit where current flows only in one path is known as a series circuit.

In series circuit current passing through each load or resistor is the same whereas total voltage is the sum of voltage passing through each load or resistor.

Thus, we can conclude that series circuit has only one loop for a current to flow through it.

MrRa [10]3 years ago

4 0

B) Series, because parallel is split into two making two loops for a current to flow.

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Which pattern in electronegativity do elements in the periodic table display?

jeka57 [31]

Answer:

Electronegativity increases from left to right within a row of the periodic table

Explanation:

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3 years ago

The combustion of liquid methanol has a change in enthalpy of -1278 kJ. How much energy will you get from burning 245.0 g of met

Nookie1986 [14]

Answer : 9773 kJ

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of methanol}=\frac{245.0g}{32.04/mol}=7.647moles$

Given : Change in enthalpy on combustion of 1 mole of methanol = -1278 kJ

According to stoichiometry :

1 mole of methanol produce energy = 1278 kJ

Thus 7.647 moles of methanol produce energy = $\frac{1278}{1}\times 7.647=9773kJ$

Thus 9773 kJ of energy is produced from burning 245.0 g of methanol in excess oxygen

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3 years ago

Why must living things rely on thousands of catalysts for chemical reactions necessary for life?

Murrr4er [49]

Well, you don't need enzymes (biological catalysts) if you're willing to wait a century or two to digest a burger.

Without catalysts, complex reactions like digestion would take too long and the organism could not extract energy from the nutrients it eats in a practical time frame.

In addition, speed is everything in the biological world.

Some reactions and their speed relative to other organisms reactions determines who survives and who doesn't, among other aspects of life.

If a plant is slow to photosynthesize and grow in a habitat high in competition for sunlight real estate, other autotrophs will surely take over.

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3 years ago

Read 2 more answers

What do you call the meetings of two planets/objects as seen from the earth? hurrry ASAP!!!!!

RoseWind [281]

Answer:

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3 years ago

Some one help me please I'm stuck Show using two conversion factors how you would convert from 0.020 kg into mg.

julia-pushkina [17]

Answer:

$=2.0x10^4mg$

Explanation:

Hello there!

In this case, when performing units conversions involving two proportional factors we need to make sure we first convert to the base unit and then to the target one; thus, since 1 kg = 1000 g and 1 g = 1000 mg, we set up the following expression:

$=0.020kg*\frac{1000g}{1kg} *\frac{1000mg}{1g} \\\\=2.0x10^4mg$

Best regards!

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3 years ago