1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maksim231197 [3]
3 years ago
15

Can someone plzzz help me with this numbers 1-13 plzz show work plzzz due tomorrow I need help I’ll give brainliest

Chemistry
1 answer:
ipn [44]3 years ago
7 0

Explanation:

Question 1:  

We have to use the aid of the periodic table to solve this problem and decipher some of the species.  

The number of protons is the number of positively charged particles. It the same as the atomic number.  

Number of electrons is the number of negatively charged particles.  

Neutrons do not carry any charges.  

Mass number = number of protons + number of neutrons

Solving:  

Symbol  #atomic #protons #electrons #neutrons mass# atomic mass

  Fe            26           26           26                  30         56              55.8  

  As³⁺         33            33          36                   42         75                74.9

   Ag            47           47          47                    61          108             107.9

    I¹⁻             53           53           54                   74          127             126.9

    K              19             19            19                  20           39               39.1

learn more:  

Atomic number brainly.com/question/2057656

Question 2:  

An ion is an atom that has either lost or gained electron.  

A positively charged ion is one that has lost electrons and the number of protons is now more. They are called cation

A negatively charged specie is one that has gained electrons and the number of electrons are now more. They are called anions.  

Mass number is the superscript = Number of protons + number of neutrons

Atomic number = number of protons = number of electrons for neutral atoms

Species:  

      ₇¹⁴N³⁻

Number of protons = 7

Number of electrons = 7 + charge = 7+ 3 = 10  

Number of neutrons = 14 - 7 = 7  

    ¹¹²₄₈Cd²⁺

Number of protons = 48

Number of electrons = 48 -2 = 46

Number of neutrons = 112 - 48 = 64

       ⁶⁴₂₉Cu

Number of protons = 29

Number of electrons = 29

Number of neutrons = 64 - 29 = 35

       

       ¹¹⁹₄₄Sn⁴⁺

Number of protons = 44

Number of electrons = 44 - 4 = 40

Number of neutrons = 119 - 44 = 75

         ¹⁹₉F⁻

Number of protons = 9

Number of electrons = 9+ 1 = 10

Number of neutrons = 19 - 9 = 10

learn more:

Number of protons, neutrons and electrons brainly.com/question/2757829

Question 3:

Mass number

The number 79 in Se - 79 specifies the mass number of the element. It suggests that Se is the number 34 element on the periodic table.

  • The periodic table arranges elements based on their atomic number.
  • The atomic number is the number of protons in an atom
  • Every atoms has a unique atomic number which makes them different from other atoms.
  • In neutral atoms, the atomic number is the same as the number of protons and the number of electrons in an atom.
  • The mass number is the number of protons plus neutrons of an atom.

learn more:

Mass of proton brainly.com/question/4999318

Question 4:

Number of protons = 14

Atomic structure:

                           ²⁸₁₄Si

  • In this atom designated above Si is the symbol of Silicon, the fourteenth element in the periodic table.
  • The superscript 28 is the mass number of the atom
  • The mass number is the number of protons and neutrons in the nucleus of the atom.
  • It is also called the nucleon number because protons and neutrons are nucleons.
  • The subscript 14 is the atomic number.
  • It is the number of protons in the atom.
  • For neutral atoms, it is also the number of electrons

learn more:

Number of protons, neutrons and electrons brainly.com/question/2757829

Question 5:

The total number of subatomic particles = 289

  Structure is ²⁰⁷₈₂Pb

  • The subatomic particles in an atom are protons, neutrons and electrons
  • Protons are the positively charged particles in an atom
  • Neutrons have no charge
  • Electrons carry negative charges

In the atom above, since it is neutral, the number of protons = number of electrons

    Number of protons = atomic number

This is the subscript;

    Number of protons = 82

   Number of electrons = 82

Number of neutrons = mass number - atomic number

Mass number is the superscript

Number of neutrons = 207 - 82 = 125

The total number of subatomic particles = number of protons + number of neutrons + number of electrons

  Total number of subatomic particles = 82 + 82 + 125 = 289

learn more:

protons, neutrons and electrons brainly.com/question/2757829

Question 6:

29

Given parameters :

Number of neutrons = 31

Mass number = 59

Unknown:

Atomic number = ?

Solution:

The mass number of an atom is the number of protons and neutrons it contains.

The mass of an atom is concentrated in the nucleus and this is where we derive the mass number from;

    Mass number = number of protons + number of neutrons

Number of protons = 59 - 31 = 28

 The number of protons in an atom is the same as the atomic number.

Atomic number = 28

learn more:

Atomic number brainly.com/question/2057656

Question 13 remainder;

When sodium loses an electron, the number of protons will be more than that of electrons

It then becomes an ion;

Number of protons = 11

Number of electrons = 11 - 1 = 10 Charge = 11 - 10 = 1+

With a loss of one electron, sodium will now resemble Ne more closely because it has a stable configuration.

learn more

lon brainly.com/question/4670413

#learnwithBrainly

You might be interested in
One method used commercially to peel potatoes is to soak them in a solution of NaOH for a short time and then remove them from t
sergij07 [2.7K]

Answer:

b. 2.28 M

Explanation:

The reaction of neutralization of NaOH with H2SO4 is:

2NaOH + H2SO4 → Na2SO4 + 2H2O

<em>Where 2 moles of NaOH react per mole of H2SO4</em>

<em />

To solve the concentration of NaOH we need to find the moles of H2SO4. Using the chemical equation we can find the moles of NaOH that react and with the volume the molar concentration as follows:

<em>Moles H2SO4:</em>

45.7mL = 0.0457L * (0.500mol/L) = 0.02285 moles H2SO4

<em>Moles NaOH:</em>

0.02285 moles H2SO4 * (2moles NaOH / 1 mol H2SO4) = 0.0457moles NaOH

<em>Molarity NaOH:</em>

0.0457moles NaOH / 0.020L =

2.28M

Right option:

<h3>b. 2.28 M</h3>
7 0
3 years ago
A piece of metal with a mass of 147g and a volume of 21ml. Calculate the density of the metal.
kipiarov [429]

Answer:

density of a piece of metal = 7 gr/ml

Explanation:

See the file please

3 0
3 years ago
Read 2 more answers
How many sulfur atoms are present in 100 grams of this compound? Report your answer to three significant figures.
kap26 [50]

Answer:

1.88 × 10²⁴ atoms

Explanation:

Step 1: Given data

Mass of sulfur: 100 g

Step 2: Calculate the moles corresponding to 100 g of sulfur

The molar mass of sulfur is 32.07 g/mol. The moles corresponding to 100 g of sulfur are:

100 g × (1 mol/32.07 g) = 3.12 mol

Step 3: Calculate the number of atoms in 3.12 moles of sulfur

We will use Avogadro's number: there are 6.02 × 10²³ atoms of sulfur in 1 mole of sulfur.

3.12 mol × (6.02 × 10²³ atoms/1 mol) = 1.88 × 10²⁴ atoms

7 0
3 years ago
Solve for Va<br><br>MaVa=MbVb​
PolarNik [594]

Answer:

Va = (MbVb)/Ma

Explanation:

Divide both sides by Ma and voila!

8 0
3 years ago
5 point<br> How many molecules are in 50g of CO2?
Alex73 [517]

Answer:

The answer is 44.0095 molecules

7 0
3 years ago
Read 2 more answers
Other questions:
  • What are small round structures in the cell that breaks down large food particles into smaller ones
    13·2 answers
  • Dalton’s atomic theory included which idea?
    14·1 answer
  • Consider the following balanced equation: SiO2(s)+3C(s)→SiC(s)+2CO(g) Complete the following table showing the appropriate numbe
    8·2 answers
  • Electrophiles for the electrophilic aromatic substitution reactions have to be very strong to react with the stable aromatic rin
    5·1 answer
  • Which of these examples is a water-conservation technique that also reduces water pollution
    11·2 answers
  • How many atoms of gold (Au) are equal to 212g of gold?
    7·1 answer
  • All I need is the answer I don’t need any work shown, what is the pH= ?
    15·1 answer
  • Copper sulfate is made of one copper (Cu) atom, one sulfur (S) atom, and four oxygen (O) atoms. Write the chemical formula corre
    12·1 answer
  • 5. The formula unit of calcium sulfide is :<br>(1 Point)<br>OCa, S,<br>o Ca₂S<br>O Ca23<br>O Cas​
    8·1 answer
  • Calculate the Molarity when 14.6 g Ethanol (C2H5OH) is dissolved in a 2.10 L solution.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!