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3 years ago

1.) What are the chemical properties of matter?

Chemistry

1 answer:

denis23 [38]3 years ago

3 0

Answer:

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust. Reactivity is the ability of matter to react chemically with other substances.

Explanation:

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a solution was made by mixing sodium chloride () and water (). given that the mole fraction of water is 0.980 in the solution ob

Mnenie [13.5K]

The mass of sodium chloride used was 1.17 grams.

The mole fraction can be calculated by way of dividing the number of moles of 1 factor of an answer via the full variety of moles of all the additives of an answer. it is mentioned that the sum of the mole fraction of all the components inside the solution has to be the same as one.

mass of NaCl given = 64.9 g

mole = mass/molar mass

= 64.9 / 58.5

= 1.109

a mole fraction of water = 0.980

mole fraction of NaCl = 1 - 0.980

= 0.02

1 mole of NaCl = 58.5

mass of NaCl = 58.5 × 0.02

= 1.17 gram

Mole Fraction describes the range of molecules contained within one aspect divided through the whole range of molecules in a given combination. it's miles quite beneficial whilst two reactive-natured components are mixed collectively.

Learn more about mole fraction here:-brainly.com/question/29111190

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1 year ago

If an atom has the same equal amount of electron and proton is it charged or uncharged

Doss [256]

Answer:

Neutral or uncharged

Explanation:

The positive charge on a proton is equal in magnitude to the negative charge on an electron. As a result, a neutral atom must have an equal number of protons and electrons.

3 0

2 years ago

Read 2 more answers

Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The o

liberstina [14]

Answer: Molar concentration of the tree sap have to be 0.783 M

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iCRT$

where,

$\pi$ = osmotic pressure of the solution = 19.6 atm

i = Van't hoff factor = 1 (for non-electrolytes)

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $32^oC=[273+32]=305K$

Putting values in above equation, we get:

$19.6atm=1\times C\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 305K$

$C=0.783M$

Thus the molar concentration of the tree sap have to be 0.783 M to achieve this pressure on a day when the temperature is 32°C

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3 years ago

How many grams of o2(g) are needed to completely burn 70.2 g of C3H8(g)

Lubov Fominskaja [6]

First you must write a balanced chemical equation.

C3H8 + 5O2 --> 3CO2 + 4H2O

From there, we can set up the stoichiometry equation to solve.

g O2= 70.2 g C3H8 X (1 mol C3H8/44.0962g C3H8) X (5 mol O2/1 mol C3H8) X (31.998g O2/1 mol O2)

Now solve, and you should get 254.7 g O2. Hope this helped!

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3 years ago

What is special about the kelvin temperature scale

nalin [4]

Kelvin is a temperature scale designed so that zero degrees K is defined as absolute zero (at absolute zero, a hypothetical temperature, all molecular movement stops - all actual temperatures are above absolute zero) and the size of one unit is the same as the size of one degree Celsius.

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3 years ago