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3 years ago

HELP! How many kernel electrons are in Na+1??

Chemistry

1 answer:

Oksana_A [137]3 years ago

3 0

Answer:

So, sodium's 11 electrons are arranged this way: 2 electrons in the first "shell", 8 electrons in the second "shell"; and 1 electron (the valence electron) in the third "shell".

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PLEASE HELP MEEE I WILL MARK BRAINLIST FOR THIS ITS SUPER SIMPLE....BUT U MUST TYPE EVERYTHING

Alina [70]

Answer:

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Explanation:

7 0

3 years ago

Read 2 more answers

Consider the reaction I2O5(g) 5 CO(g) -------> 5 CO2(g) I2(g) a) 80.0 grams of iodine(V) oxide, I2O5, reacts with 28.0 grams

Allisa [31]

Answer:

Maximum mass of $I_2$ produces=50.8g;

Explanation:

Firstly balance the chemical reaction,

$I_2 O_5+5CO=5CO_2+I_2$

Molecular weight of $I_2 O_5$ =334g/mole;

Molecular weight of CO =28g/mole;

Number of mole of $I_2 O_5$ given=80g/(334g/mole)=0.239mole;

Number of mole of CO given=28g/(28g/mole)=1 mole

Moles are:

Number of mole of $I_2 O_5$ =0.239

Number of mole of CO=1;

From the balanced equation,

1 mole of $I_2 O_5$ reacts with 5 moles of CO;

Hence;

0.239 mole of $I_2 O_5$ will react with 5*0.239 moles of CO means

Moles of CO that reacts with $I_2 O_5$ =1.2 mole but we have given 1 mole therefore

$I_2 O_5$ Will be excess reagent and CO will be the limitting reagent

And mass of product depends on limiting reagent i.e. mass of CO.

5 mole of CO produces 1 mole $I_2$ of $I_2$ ;

1 mole of CO produces 1/5 mole of $I_2$ ;

Maximum mass of $I_2$ produces=mole*molecular weight;

Molecular weight of $I_2$ =254g/mole;

Maximum mass of produces $I_2$ = (1/5)*254=50.8g;

Maximum mass of $I_2$ produces=50.8g;

3 0

3 years ago

Breaking an object such as a mirror is an example of physical change, chemical change,physical reaction, chemical reaction

dangina [55]

Answer:

option A= Physical change

Explanation:

physical change:

" It is a change in which no new substance is formed"

Breaking of object like glass is the example of physical change because it is not change into another object. It effect the form of object but can not change the chemical composition.

Chemical changes:

" it is a change in which one substance is converted into new product through chemical reaction".

During the chemical changes the types and the number of atom remain same but their arrangement changed.

for example: burning of wood, baking of cake, digesting food, resting of iron etc.

Physical reaction:

" physical reaction occur during the molecular rearrangement. There is no chemical change occur"

In this type of changes no bonds are break to form new bonds, for example boiling point.

Chemical reaction:

" chemical reaction occur when molecules are chemically react with each others and bonds formation and breaking is also occur"

5 0

3 years ago

At STP what is the volume of 16.34 grams of nitrogen gas?

nika2105 [10]

Answer:

Volume = 13.06 L

Explanation:

We are given: mass of nitrogren gas = 16.34 g

We know: molar mass of nitrogen gas = 28.014 g/mol

: ideal gas law constant = 0.082 L.atm/K.mol

At STP: temperature = 273.15 K

: pressure = 1 atm

We first determine the number of moles of nitrogen gas:

n = m/M

= 16.34/28.014

= 0.58 mol

Using the ideal gas law:

$\begin{gathered} PV\text{ = nRT} \\ \\ \therefore V\text{ = }\frac{nRT}{P}\text{ = }\frac{0.58\times0.082\times273.15}{1}\text{ = 13.06 L} \end{gathered}$

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1 year ago

The energy stored in fossil fuels originated from ____. A) fusion B) lightning C) thermal energy D) electrical energy

Mariana [72]

Answer:I'm not completely sure but I think the energy stored in fossil fuels came from the sun and was captured through photosynthesis.

Explanation:

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3 years ago