Balance the following equations:
i. H2SO4 + ….NaHCO3 → Na2SO4 + ….H2O + ……CO2
ii. H2 + I2 → ….HI
iii. …..NaOH + H2SO4 → Na2SO4 + …..H2O
iv. ……FeSO4 → Fe2O3 + SO2 + SO3
v. C3H6O2 + …..O2 → ….CO2 + …..H2O
b) Calculate the molecular masses of the following:
i. H2SO4

ii. CH4

iii. NH3

c) 56g of iron reacts with 71g of chlorine. How many grams of iron react with 35.5g of chlorine? ​

Answers

Answer 1
Hey There!_____________________________________Answer:_____________________________________Balancing the following equations:

(I) [tex]H_2SO_4+ 2NaHCO_3--> Na_2SO_4 + 2 H_2O + 2CO_2[/tex]

(II) [tex]H_2+I_2 --> 2HI[/tex]

(III) [tex]2NaOH+H_2SO_4--> Na_2SO_4+ 2H_2O[/tex]

(IV) [tex]2FeSO_4--> Fe_2O_3+SO_2+SO_3[/tex]

(V) [tex]2C_3H_6O_2+7O_2-->6CO_2+6H_2O[/tex]

_____________________________________Molecular Masses of the following:

------------------------------------------------------------------------------------------------------------

(I) [tex]H_2SO_4[/tex]

(ANS) [tex]98 \frac{grams}{mol}[/tex]

__________________________________________________________

Solution:

Molecular mass of,

H = 1

S = 32

O = 16

Now,

There are 2 atoms of Hydrogen, 1 atoms of Sulfur and 4 atoms of Oxygen present, thus,

[tex]H_2SO_4 = (1x2)+32+(16x4)[/tex]

[tex]H_2SO_4 = 98 \frac{grams}{mol}[/tex]

_____________________________________

(II) [tex]CH_4[/tex]

(ANS) [tex]16 \frac{gram}{mol}[/tex]

_________________________________________________________

Solution:

Molecular Mass,

Carbon = 12

Hydrogen = 1

Now

There are 1 atom of Oxygen and 4 atoms of Hydrogen present, thus,

[tex]CH_4 = 12 + (1x4)[/tex]

[tex]CH_4 = 16\frac{grams}{mol}[/tex]

_____________________________________

(III) [tex]NH_3[/tex]

(ANS) [tex]17 \frac{grams}{mol}[/tex]

__________________________________________________________

Solution:

Molecular Mass,

Nitrogen = 14 grams

Hydrogen = 1

Now,

There are 1 atoms of Nitrogen and 3 atoms of Hydrogen present, thus,

[tex]NH_3 = 14 + (1x3)[/tex]

[tex]NH_3 = 17 \frac{grams}{mol}[/tex]

_____________________________________How many Grams of Iron(fe):[tex]Fe + Cl_2 --> FeCl_2[/tex]

56     71

x       35.5

_____________________________________

[tex]X = \frac{56 x 35.5}{71}[/tex]

Simplify the equation

X = 28 grams

__________________________________________________________

Answer:

28 grams of Iron(fe) will react with chlorine.

_____________________________________Best Regards,'Borz'

Related Questions

True or False: The only planet that has gravity is the Earth.
O True
False

Help please:)

Answers

Answer:

False.

Explanation:

all planets have gravity because if they didnt, the gasses and whatever makes up the planet wouldnt be pulled down to the core of the planet, and it would just be floating around in space.

When turgor pressure is high enough in a cell, the cell walls become _____

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Answer:

the answer is "Firm".

Explanation:


A diver's tank contains helium at 924 psi,
nitrogen at 1456 psi and oxygen. The total
pressure is 2803 psi. What partial pressure is
exerted by the oxygen?

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423 psi

Hope this helps and GOOD LUCKKK :)))

Which of the below elements will not likely form an ionic bond?
A.
Cs & O
B.
P & O
C.
Ne & Cl
D.
Li & Mg

Answers

Answer:

B

Explanation:

I think this is right

Matter is anything that takes up _______, has _______, and is made up of particles.

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Answer:

space,mass

Explanation:

RIGHT ANWSER WILL BE MARKED BRAINLIEST

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Answer:

11460

Explanation:

true or false, during a change of state, the thermal energy gained or lost by a material changes the kinetic energy of its particles

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Answer:

true..... not false okkkkk

The statement is true.

A compound is 39.97% carbon, 13.41% hydrogen, and 46.62% nitrogen. What is the empirical formula?

Answers

Answer:

CH4N

A compound is 39.97% carbon, 13.41% hydrogen, and 46.62% nitrogen.

Explanation:

Hope this helps.

Answer: CH4N is correct

Explanation:

39.97% carbon

13.41% hydrogen

46.62% nitrogen.

what happens if the temperature of a system at equilibrium is increased?

Answers

Increasing the temperature decreases the value of the equilibrium constant. ... If you increase the temperature, the position of equilibrium will move in such a way as to reduce the temperature again. It will do that by favouring the reaction which absorbs heat.
There are multiple answers:

1. The relative amount of products at equilibrium increases for an endothermic reaction
2. The relative amount of products at equilibrium decreases for an exothermic reaction
(Extra) If the temperature of a system at equilibrium is decreased

1. The relative amount of products at equilibrium decreases for an endothermic reaction
2. The relative amount of products at equilibrium increases for an exothermic reaction

Hope this helps!

A rocket will rotate about a single point called the _?

Answers

Answer:

Center of gravity.

Explanation:

The answer is center of gravity

Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!

Answers

It’s A or B but liquids take the shape of their container so I bet you it’s B

What would be one way to avoid static electricity? А) Dry cotton fabrics and synthetic fabrics separately. B) Run a metal clothes hanger across your dry hair. C Use a blow dryer to dry your hair. D Wear shoes with rubber soles.​

Answers

Answer: The answer would be A.

Explanation:

Answer: B

Explanation:

Steel has a density of 7.8 g/cm3. What is the volume of a 78-gram piece of steel?

Answers

Answer:

10 cm³

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question we have

[tex]volume = \frac{78}{7.8} \\ [/tex]

We have the final answer as

10 cm³

Hope this helps you

Observe: Look at the red lithium atom and the blue oxygen atom. Recall that most atoms are stable when their outermost ring has eight electrons. (Some atoms, such as lithium and beryllium, are stable when their outermost ring has two electrons.)

How many electrons will the lithium atom give up to become stable?

1. eight

2. seven

3. two

4. one

Answers

Answer:

4. one

Explanation:

Which of the following equations of CH4 + Cl2
-
CCl4+ HCl is balanced?
A. O CH4 + Cl2 - CC14+ HCI
B.
CH4 + Cl2 - CCl4 + 4HCI
С.
CH4 + 4Cl2 - CCl4 + 4HCI
D
CH4 + 2Cl2 - CCl4 +2HCI

Answers

Balanced equation : C. CH₄ + 4Cl₂⇒  CCl₄+ 4HCl

Further explanation  

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.  

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product  

3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

Reaction

CH₄ + Cl₂⇒  CCl₄+ HCl

Give coefficient :

aCH₄ + bCl₂⇒  CCl₄+ cHCl

Make equation :

C, left=a, right=1⇒a=1

H, left=4a, right=c⇒4a=c⇒4.1=c⇒c=4

Cl, left=2b, right=4+c⇒2b=4+c⇒2b=4+4⇒2b=8⇒b=4

The equation becomes :

CH₄ + 4Cl₂⇒  CCl₄+ 4HCl

What happens when the two atoms are Too close

Answers

the electrons of each atom will be attracted to both nuclii.

1. Which of the following substances is believed to be responsible for the hole in the ozone
layer?
A. Ammonia
B. Chlorofluorocarbons (CFCs)
C. Lead
D. Carbon monoxide

Answers

A. Ammonia because look it up

Which is an example of an exothermic reaction?

A. the rusting of iron
B. dissolving ammonium chloride in water C. photosynthesis
D. baking bread​

Answers

Answer:

the answer is b

Explanation:

D is the correct answer

PLEASE HELP I WILL GIVE BRAINLIEST!!! Its due tonight at 12:00

Answers

Answer:

c

Explanation:

we have only distance vs time graph so c is the right answer that cart is moving with constant speed of 0.5m/s

confirmed

first calculate distance which is from 2 to 5.5

5.5-2=3.5

apply the formula of velocity

v=s/t

v=3.5/7=0.5

Answer:

Answer is C

Explanation:

v= 3.5/7 = 0.5

what are the energy transformations taking place in your alarm clock

Answers

Answer:

Explanation:

The clock now has potential energy. When the alarm rings, the potential energy is converted into kinetic energy and sound energy.

Alarm clock runs due to the electrical energy. Due to the electric current, the electric motor rotates the blade. It means that the electrical energy is converted into mechanical energy.

The mechanical energy finally generates vibrations which cause sound.    

Thus, energy transformation which takes place in alarm clock will follow the order-

Electrical to mechanical to sound.

Which ion would represent the ion of an element from Group 2A?
A2+
Y3+
X2-
Z+

Answers

Answer:

A2+

..........

Explanation:

they lose 2 electrons to form an ion

Calculate the atomic mass of copper if copper-63 is 69.17% abundant and copper-65 is 30% abundant

Answers

Answer:List of isotopes

Nuclide Z Isotopic mass (Da)

Excitation energy

63Cu 29 62.9295975(6)

64Cu 29 63.9297642(6)

65Cu 29 64.9277895(7)

Explanation:

Composed of two flat pins or flat holes for the live and neutral wire, commonly found in the household here in the Philippines.
A.)Fuse
B.)circuit breaker
C.)Type A electrical plug or outlet
D.)Type B plug or outlet

Science subject

Answers

Answer:

C.)Type A electrical plug or outlet

Explanation:

Usually, there are two types of plugs or outlets commonly available in most countries. These are the type A and type B plugs or outlets.

The Plug type A or outlet has two flat parallel pins while plug type B or outlet has two flat parallel pins and a grounding pin.

One of these two is the live while the other is the neutral wire. When you connect it to power, current flows from the live to the neutral.

picture *** pls help

Answers

The volume of Oxygen at STP required : 251.25 L

Further explanation

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

Reaction(combustion) :

2C₂H₂(g)+5O₂(g)⇒4CO₂(g)+2H₂O(g)

mol C₂H₂ :

[tex]\tt \dfrac{100.5}{22.4}=4.49[/tex]

mol ratio C₂H₂ : O₂ = 2 : 5, so mol O₂ :

[tex]\tt \dfrac{5}{2}\times 4.49=11.23[/tex]

volume  O₂ at STP :

[tex]\tt 11.23\times 22.4=251.55~L[/tex]

Or you can use Avogadro's hypothesis :

In the same temperature and pressure, in the same volume conditions, the gas contains the same number of molecules  

So the ratio of gas volume will be equal to the ratio of gas moles  :

[tex]\tt \dfrac{V_1}{V_2}=\dfrac{n_1}{n_2}\\\\\dfrac{100.5}{V_2}=\dfrac{2}{5}\\\\V_2=\dfrac{100.5\times 5}{2}=251.25~L[/tex]

write the name of the first twenty elements with their symbols and their atomic number​

Answers

Answer:

1 Hydrogen H

2 Helium He

3 Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

7 Nitrogen N

8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

12 Magnesium Mg

13 Aluminium Al

14 Silicon Si

15 Phosphorus P

16 Sulfur S

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20. calcium Ca

Answer:

h - hydrogen (1)

he - helium (2)

li - lithium (3)

be - beryllium (4)

b - boron (5)

c - carbon (6)

n - nitrogen (7)

o - oxygen (8)

f - fluorine (9)

ne - neon (10)

na - sodium (11)

mg - magnesium (12)

al- aluminium (13)

si - silicon (14)

p - phosphorus (15)

s - sulfur (16)

cl - chlorine (17)

ar - argon (18)

k - potassium (19)

ca - calcium (20)

Please answer these. The tables needed for question 7 are in the picture. I got rid of some of the questions that you wouldn’t be able to answer without doing the lesson

Question 1: Electron Notation Example (2 points)

a. Give the electron configuration of vanadium (V), atomic number 23. (0.5 points)

b. Give the noble gas configuration of vanadium (V), atomic number 23. (0.5 points)

c. List the energy levels for the orbital configuration of vanadium (V), atomic number 23. (1 point)

Question 3: Trends on the Periodic Table (2 points)
a. How does the atomic radius change going down and across the periodic table? (0.5 points)

b. How does first ionization energy change going down and across the periodic table? (0.5 points)

c. How does electronegativity change going down and across the periodic table? (0.5 points)

d. How does the radius of a positive and negative ion compare to a neutral atom? (0.5 points)

Question 4: Chemical Bonds (1 point)
Match each chemical bond to its correct description. (1 point)
A. Ionic bond ___ Sharing of electrons
B. Covalent bond ___ Freely moving electrons
C. Metallic bond ___ Transfer of electrons
Question 5: Intermolecular Forces (3 points)

a. Describe the dipole-dipole force. (1 point)

b. Describe hydrogen bonding. (1 point)

c. Describe the Van der Waals forces. (1 point)

Question 6: Intermolecular Forces and You (2 points)
Imagine you need to take a medicine that the doctor has prescribed for you. Explain why scientists who developed that medicine would need to know whether or not the compound in that medicine is polar. How might a polar medicine behave differently within your body than a nonpolar medicine would? Answer in 1 to 2 paragraphs.

Question 7: Energy in Bonds (9 points)
Use these tables for reference for all parts of this question.

This table summarizes the average energies of single bonds between atom pairs in many different compounds.
a. According to Table 2, which is the strongest bond? Which is the weakest bond? Based on what you know about the atomic radii and electronegativity of the elements involved in the bonds, why do you think these two have the most extreme bond-energy values? (3 points)

b. How are the bond energies of each bond listed in Table 2 determined? (1 point)

c. Why do you think there aren't bond energy values given in Table 2 for N–S and S–I? (1 point)

d. Based on Tables 1 and 2, how would you describe the trend in bond strength of single, double, and triple bonds? (1 point)

e. Based on Table 2, how would you describe the trend in the strength of bonds formed by the elements carbon, nitrogen, and oxygen? Would you describe this trend as a periodic trend? Why or why not? (3 points)

Question 8: Causes of Molecular Shape (3 points)
a. What is the VSEPR theory? (1 point)

b. How does electron repulsion determine molecular shape? (1 point)

c. How do lone electron pairs affect molecular shape? (1 point)

Question 10: Lewis Structure (3 points)
a. Draw the Lewis structure for the Se and 2 H atoms. (1 point)

b. Draw the Lewis structure for the SeH2 molecule. (1 point)

c. What shape would SeH2 have? Draw the molecule. (1 point)

Question 11: Ionic and Covalent Compounds (5 points)
Identify each of the following as a covalent compound or ionic compound. Then provide either the formula for compounds identified by name or the name for those identified by formula. (1 point each)
a. Li2O:

b. Dinitrogen trioxide:

c. PCl3:

d. Manganese(III) oxide:

e. Calcium bromide:

Answers

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

What is element?

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of vanadium is 23. The electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³. The noble gas electronic configuration of vanadium is  [Ar]3d³4s². 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals.

Therefore, the electronic configuration of vanadium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³.

To know more about element, here:

brainly.com/question/8460633

#SPJ2

What do you think it means to "use safe cooking practices?"​

Answers

Using safe cooking practices means taking the proper precautions in the kitchen to avoid accidents and any injuries.

~theLocoCOco

Answer:

to be safe

Explanation:

just follow intructions and watch what u do

Make
a claim about why cells need ribosomes.
Summarize evidence to support the claim
and explain your reasoning.
ls?

Answers

Cells need ribosomes to make protein.

What quantity is needed to convert between the moles of a
given sample of a substance and its mass in grams?
a the molar mass of the substance
b the density of the substance
с
the physical state of the substance
d all of the above
Check it

Answers

Answer:

a

the molar mass of the substance

Answer: a

The molar mass of the substance

Explanation:

In the reaction 2AgI + Na2S → Ag2S +2NaI, calculate the number of moles of AgI needed to react with 85.0 g

Answers

Answer:

8.5gNaI × 1molNaI/78gNaI × 234.7g AgI / 1 MOL AgI × 2Mol Ag I / 1mol Na2S=51.2 g of AgI reacts with Na2 S

Explanation:

conversion factor is used to make sure that all the units cancels with the other units and we only remain with the mass of Ag I which is 51.2g but since the number of moles can be calculated by dividing with the relative molecular mass therefore 51.2g/234.7gmol=0.22mol

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