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4 years ago

What is electrical conductivity? Make it simple

2 answers:

6 0

Answer: Electrical resistivity and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current. A low resistivity indicates a material that readily allows electric current.

Alenkasestr [34]4 years ago

3 0

Answer: Explanation:

Conductivity of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is Siemens per meter.

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Which example shows an interaction between the urinary system and the circulatory system?

belka [17]

C. A bee stinging the skin flowing to the kidneys (:

4 0

3 years ago

Read 2 more answers

Which statement explains the energy term in this reaction

lana66690 [7]

Answer:

Mass is lost due to the conversion of mass to energy

Explanation:

The question is not complete, the complete question is given as:

$^{235}_{72}U +^{1}_{0}n$ ⇒ $^{140}_{56}Ba+^{93}_{36}Kr+3^{1}_{0}n+energy$

total mass equals 236.053 u total mass equals 235.868 u

Which statement explains the energy term in this reaction? (1) Mass is gained due to the conversion of mass to energy. (2) Mass is gained due to the conversion of energy to mass. (3) Mass is lost due to the conversion of mass to energy. (4) Mass is lost due to the conversion of energy to mass.

Answer: From Einstein’s equation E = mc², when a radioisotope element undergoes fission or fusion in a nuclear reaction, it loses a tiny amount of mass.This mass lost is converted to energy.

The law of conservation of energy holds for this type of reaction (i.e the sum of mass and energy is remains the same in a nuclear reaction). Mass changes to energy, but the total amount of mass and energy combined remains the same before and after a nuclear reaction.

From the reaction above, the total decrease in mass = 236.053 - 235.868 = 0.185 u

4 0

3 years ago

How many atoms are present in 0.529 moles of Li?

nirvana33 [79]

Answer:

<h2>3.18 × 10²³ atoms</h2>

Explanation:

The number of atoms can be found by using the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 0.529 × 6.02 × 10²³

We have the final answer as

<h3>3.18 × 10²³ atoms</h3>

Hope this helps you

6 0

3 years ago

Need help asap!!! (SCIENCE)

balu736 [363]

<h3><u>Answer;</u></h3>

10 percent

<h3><u>Explanation;</u></h3>

Probability is a number that describes how likely it is that an event will occur.

In this case; If each of 10 events is equally likely to occur, the probability of each individual event occurring is 1/10.

Therefore; as a percentage;

1/10 × 100 = 10 percent

Hence; The probability of each individual event occurring is 10 percent

6 0

3 years ago

Please help! Consider the following reaction: 3H2S (g) + 3O2 (g)  2 SO2 (g) + 2H2O (g) If O2 was the excess reagent, 4.15 mol o

iren [92.7K]

Answer:

91.8 %

Explanation:

Data given:

Amount of H₂S = 4.15 mol

Amount of water (H₂O) = 68.55 g

Amount of oxygen O₂ = in excess

Percent yield of reaction water (H₂O) of water = ?

Reaction Given:

2H₂S (g) + 3O₂ (g) ----------> 2SO₂ (g) + 2H₂O (g)

Solution:

First we look for the theoretical yield by looking in the reaction

2H₂S (g) + 3O₂ (g) ----------> 2SO₂ (g) + 2H₂O (g)

As oxygen is in the excess so only H₂S amount act as limiting reagent.

2H₂S (g) + 3O₂ (g) ----------> 2SO₂ (g) + 2H₂O (g)

2 mol 2 mol

to convert amount of H₂O from moles to grams

mass in grams = no. of moles x molar mass

Molar Mass of H₂O = 2(1) + 16 = 18 g/mol

Put values in above equation

mass in grams = 2 mol x 18 g/mol

mass in grams = 36 g

So,

3H₂S (g) + 3O₂ (g) ----------> 2SO₂ (g) + 2H₂O (g)

2 mol 36 g

As from the reaction it is clear that 2 mole of H₂S gives 36g H₂O then 4.15 mole will give how many grams of water

Apply unity formula

2 mol of H₂S ≅ 36 g of H₂O

4.15 mol of H₂S ≅ X g of H₂O

Do cross multiplication

X g of H₂O = 36 g x 4.15 mol / 2 mol

X g of H₂O = 74.7 g

So theoretical yield = 74.7 g of H₂O

Formula used for percent yield

percent yield = actual yield / theoretical yield x 100

Put values in above equation

percent yield = 68.55 g / 74.7 g x 100

percent yield = 91.8 %

***Note

For SO₂ it is important to have actual yield. and implement same work.

6 0

4 years ago