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3 years ago

What happens when two negatively charged ions get closer together?

Chemistry

2 answers:

ad-work [718]3 years ago

5 0

Answer:

They repel

Explanation:

Opposites attract like repels due to dipoles

WINSTONCH [101]3 years ago

3 0

Answer:

They repel each other

Explanation:

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What is the difference between measured and accepted value? And how are these values used to determine the precision of these va

serg [7]

Measured values are verified and go under a series of experiments before being accepted as the norm. Accepted values are unanimously accepted values, seen as the norm by a qualified group of individuals (scientists or the people of the intellectual sphere).

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3 years ago

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What is the molality of the resulting solution when 15.0 g of Licl is combined with 105 g of water? 0/1 point 0 1.42 m 2.95 m 3.

xenn [34]

Answer:

3.37 m

Explanation:

Number of moles of solute present in 1 kg of solvent is termed as molality

It is represented by 'm'.

Thus,

$Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}$

Given that:

The mass of LiCl = 15.0 g

Molar mass of LiCl = 42.394 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{15.0\ g}{42.394\ g/mol}$

$Moles= 0.3538\ mol$

Mass of the solvent = 105 g

Also, 1 g = 0.001 g

So,

Mass of water (solvent) = 0.105 kg

Molality is:

$Molality\ (m)=\frac {0.3538}{0.105}\ m$

Molality = 3.37 m

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3 years ago

What negative impact did chemistry have on society through the production and use of chlorofluorocarbons (CFCs)?

andrey2020 [161]

The answer to your question is the 3rd option

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3 years ago

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On a small farm, the weights of eggs that young hens lay are normally distributed with a mean weight of 51.3 grams and a standar

Lelechka [254]

Answer:

83.85% of the population is between 46.5g and 65.7g

Explanation:

the 68-95-99.7 rule states that the probability that a random variable (X=Weights of the eggs) is found inside 1 standard deviation , 2 standard deviations and 3 standard deviations from the mean is 68% , 95% , 99.7% respectively

then calling Z to

Z= (X-μ)/σ

where μ= mean , σ = standard deviation , then

for X₁=46.5g

Z₁= (X₁-μ)/σ = (46.5g - 51.3g)/4.8 g= -1

1 standard deviation from both sides (±1) = 68%

then since the normal distribution is symmetrical

1 standard deviation from one side (±1) = 68%/2 = 34%

for X₂=46.5g

Z₂= (X₂-μ)/σ = (65.7 g - 51.3g)/4.8 g= +3

3 standard deviation from both sides (±1) = 99.7%

then since the normal distribution is symmetrical

3 standard deviation from one side (±1) = 99.7%/2 = 49.85%

then

between -1 standard deviation from the mean and +3 standard deviations from the mean there is= 34% + 49.85% = 83.85% of the population (since the regions do not overlap each other)

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What are cumulative pollutant examples?

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