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3 years ago

2 which amoung

Chemistry

2 answers:

Korvikt [17]3 years ago

7 0

It’s d because it says the highest measurement

Zanzabum3 years ago

6 0

Answer:

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Iron atoms have been detected in the sun's outer atmosphere, some with many of their electrons stripped away. what is the net el

shtirl [24]

For a proton, the charge is represented by +e
For an electron, the charge is represented by -e
The charge of an electron [e] is equal to the - 1.602 * 10^-19 Coulombs
For an ionized atom, the net charge is equal to the sum of charges in the proton and the electron in that atom.
From the question, we are told that, the iron atom has 26 protons and 7 electrons.
The net charge Q = 26 [ +e] + 7 [- e] = +19 e
+19 e = + 19 [1.602 * 10^-19 C] = + 3.04 * 10^-18 C.

3 0

3 years ago

Fabric A is used to rub a wooden rod. A second piece of Fabric A is used to rub an ebonite rod. It is observed that the wooden r

stepladder [879]

<h2>Answer:</h2>

<h3>What I think is : The protons are present at the centre of the atom with rotating electrons around it so when it is rubbed by fur the electrons get passed from the ebonite rod to the fur leaving the rod negatively charged</h3>

<h2>Hope this helps you ❤️</h2>

<h2>Mark me as brainliest ❤️</h2>

6 0

3 years ago

What is the mole fraction of each component in a solution made by mixing 300 g of ethanol(C2H5OH) and 500 g of water?

Snowcat [4.5K]

Answer:

The mole fraction of ethanol and water in the solution are 0.19 and 0.81 respectively.

Explanation:

The Molar Fraction is a way of measuring the concentration that expresses the proportion in which a substance is found with respect to the total moles of the solution, which are calculated by adding the moles of solute (s) and solvent.

It is calculated by dividing the number of moles of one of the components by the total number of moles of the solution.

The sum of all the molar fractions of the substances present in a solution is equal to 1.

So, the expression to calculate the mole fraction is:

$Molar fraction (Xi)=\frac{moles of sudstance}{total moles of the solution}$

Being the molar mass of the compounds:

Ethanol 46 $\frac{g}{mol}$

Water 18 $\frac{g}{mol}$

the number of moles that represent the mass quantities is calculated as:

Moles of ethanol: 300 grams* $\frac{1 mol}{46 grams}$ = 6.52 moles
Moles of water: 500 grams* $\frac{1 mol}{18 grams}$ = 27.78 moles

So the total moles in solution are 6.52 moles + 27.78 moles = 34.3 moles

The mole fraction of ethanol in the solution is calculated as:

$mole fraction of ethanol=x_{ethanol} =\frac{6.52 moles}{34.3 moles}$

$x_{ethanol} =0.19$

The mole fraction of water in the solution is calculated as:

$mole fraction of water=x_{water} =\frac{27.78 moles}{34.3 moles}$

$x_{water} =0.81$

Then:

$x_{water} +x_{ethanol} = 0.81 + 0.19$

$x_{water} +x_{ethanol} =1$

The mole fraction of ethanol and water in the solution are 0.19 and 0.81 respectively.

8 0

3 years ago

There are three different digits that make up the melting point of a compound. Describe these and detail what the sample looks l

Setler [38]

Answer:The three states of matter are the three distinct physical forms that matter can take in most environments: solid, liquid, and gas. In extreme environments, other states may be present, such as plasma, Bose-Einstein condensates, and neutron stars.

Explanation:

I'm pretty positive that's the right answer.........

4 0

3 years ago

Number 2 plssssssssssssssssssssssssssssssss

34kurt

Answer:

Its located on North America

7 0

3 years ago