Directions.Perform the indicated calculations to find the molar mass of the following compounds.Item no.1 serves as an example 1.BaCO32.H2O3.Ag2SO4.NH4CI5.NaOH6.KMnO47.MfCl28.Be(NO3)2
1. Directions.Perform the indicated calculations to find the molar mass of the following compounds.Item no.1 serves as an example 1.BaCO32.H2O3.Ag2SO4.NH4CI5.NaOH6.KMnO47.MfCl28.Be(NO3)2
Molar Mass
Answer:
1.) BaCO3
Ba : 1 x 137.328 g/mol = 137.328 g/mol
C : 1 x 12.011 g/mol = 12.011 g/mol
O : 3 x 15.999 g/mol = 47.997 g/mol
197.336 g/mol
Molar Mass of BaCO3 = 197.336 g/mol
2.) H2O
H : 2 x 1.008 g/mol = 2.016 g/mol
O : 1 x 15.999 g/mol = 15.999 g/mol
18. 015 g/mol
Molar mass of H2O = 18.015 g/mol
3.) Ag2SO
Ag : 2 x 107.868 g/mol = 215.736 g/mol
S : 1 x 32.066 g/mol = 32. 066 g/mol
O : 1 x 15.999 g/mol = 15.999 g/mol
263. 801 g/mol
Molar Mass of Ag2SO = 263.801 g/mol
4.) NH4Cl
N : 1 x 14.007 g/mol = 14.007 g/mol
H : 4 x 1.008 g/mol = 4.032 g/mol
Cl : 1 x 35.453 g/mol = 35.453 g/mol
53.492 g/mol
Molar Mass of NH4Cl = 53.492 g/mol
5.) NaOH
Na : 1 x 22.990 g/mol = 22.990 g/mol
O : 1 x 15.999 g/mol = 15.999 g/mol
H : 1 x 1.008 g/mol = 1.008 g/mol
39.997 g/mol
Molar Mass of NaOH = 39. 997 g/mol
6.) KMnO4
K : 1 x 39.098 g/mol = 39.098 g/mol
Mn : 1 x 54.938 g/mol = 54.938 g/mol
O : 4 x 15.999 g/mol = 63.996 g/mol
158.032 g/mol
Molar Mass of KMnO4 = 158.032 g/mol
7.) MgCl2
Mg : 1 x 24.305 g/mol = 24.305 g/mol
Cl : 2 x 35.453 g/mol = 70.906 g/mol
95.211 g/mol
Molar Mass of MgCl2 = 95.211 g/mol
8.) Be (NO3)2
Be : 1 x 9.012 g/mol = 9.012 g/mol
N : 2 x 14.007 g/mol = 28. 014 g/mol
O : 6 x 15.999 g/mol = 95.994 g/mol
133. 02 g/mol
Molar Mass of Be (NO3)2 = 133.02 g/mol
Explanation:
Compounds are substances that are made up of more than one element. To find the molar mass, we follow the steps below:
1. Find the atomic masses of individual elements in the periodic table. These atomic masses can be found in the periodic table of elements.
Example: BaCO3 - the molar masses of the elements are:
Ba is 137.328 g/mol, C is 12.011 g/mol, and O is 15.999 g/mol.
2. Count how many atoms there are for each element. This is written as subscripts of the compound.
For Ba - 1, C - 1 and O - 3
3. Find the molar mass of each element by multiplying the molar mass of the element by the number of atoms present. Then, get the sum of the molar masses.
Ba : 1 x 137.328 g/mol = 137.328 g/mol
C : 1 x 12.011 g/mol = 12.011 g/mol
O : 3 x 15.999 g/mol = 47.997 g/mol
197.336 g/mol
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2. Is BaCO3 compound is organic or inorganic
Answer:
Inorganic
Explanation:
It only has one Carbon. In order to for a compound to be organic, it should have a carbon chain or atleast 2 carbons.
Answer: Inorganic
Explanation: Barium carbonate is inorganic compound
3. how many formula units are there in 2.71 mole of BaCO3
Answer:
532.8069300000001 grams
4. how many grams of h2o are present in 2.5 moles of h2o?
Answer:
40 grams.
Explanation:
correct me if im wrong:>
Answer:
45.0 g
Explanation:
Molar mass of H2o is 18.0 g/mol
. Mass of 2.50 moles of H2o is
2.50
moles
×
18.0g
mol
=
45.0 g
5. 4. How many molecules of H2O are in one mole H2O of molecules? *A. 3.01 x 10^23 H2O of moleculesB. 6.02 x 10^23 H2O of moleculesC. 3.34 x 10^24 H2O of moleculesD. 6.02 x 10^24 H O of molecules
Answer:
In one mole are 6.02×10^23 H2O molecules.
Explanation:
hopes it helps you a lot ..pabrainliwst na din
6. 27. What is the empirical formula of a compound that is composed of 69.58 % Barium, 6.090% Carbon, and 24.32 % Oxygen? *A. BaC2O4B. BaCO4C. BaCO2D. BaCO3
Solution:
Step 1: Assume that the mass of a compound is 100 g.
[tex]\text{mass Ba = 69.58 g}[/tex]
[tex]\text{mass C = 6.090 g}[/tex]
[tex]\text{mass O = 24.32 g}[/tex]
Step 2: Calculate the number of moles of each element.
[tex]n \: \text{Ba = 69.58 g} × \frac{\text{1 mol}}{\text{137.3 g}} = \text{0.5068 mol}[/tex]
[tex]n \: \text{C = 6.090 g} × \frac{\text{1 mol}}{\text{12.01 g}} = \text{0.5071 mol}[/tex]
[tex]n \: \text{O = 24.32 g} × \frac{\text{1 mol}}{\text{16.00 g}} = \text{1.520 mol}[/tex]
Step 3: Represent an empirical formula.
[tex]\text{empirical formula} = \text{Ba}_{x}\text{C}_{y}\text{O}_{z}[/tex]
Step 4: Divide the number of moles of each element by the least number of moles.
[tex]x = \frac{\text{0.5068 mol}}{\text{0.5068 mol}} = 1[/tex]
[tex]y = \frac{\text{0.5071 mol}}{\text{0.5068 mol}} = 1[/tex]
[tex]z = \frac{\text{1.520 mol}}{\text{0.5068 mol}} = 3[/tex]
Step 5: Write the empirical formula.
[tex]\boxed{\text{empirical formula} = \text{BaCO}_{3}}[/tex]
Answer:
D. BaCO₃
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7. A 0.1799g sample of an organic compound was burned in a stream of oxygen and the CO2 produced was collected in a solution of barium hydroxide. Calculate the percentage of carbon in the sample if 0.5613g of BaCO3 was formed
The percentage of carbon : = 18.95%
Further explanationA reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
CO₂ + Ba(OH)₂ ⇒ BaCO₃ + H₂O
mol BaCO₃(MW=197,34 g/mol) :
= 0.5613 : 197.34
= 0.002844
From the equation, mol ratio of CO₂ : BaCO₃ = 1 : 1, so mol CO₂=0.002844
Mass CO₂ :
= mol x MW
= 0.002844 x 44 g/mol
= 0.125 g
Mass C in CO₂ :
= (12 : 44) x 0.125
= 0.03409
%C in the sample :
= (mass C : mass sample) x 100%
= (0.03409 g : 0.1799) x 100%
= 18.95%
Learn more
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#LetsStudy
8. how many moles of h2o are there in 36.2 grams of h2o?
Answer:
n H2O = 2.01 mol
Explanation:
n H2O = 36.2 g H2O × (1 mol H2O / 18.015 g H2O)
n H2O = 2.01 mol
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9. How many molecules of h2o are there in 0.75 mol of h2o
Answer:
4.52 × 10²³ molecules
Explanation:
nasa pic yung explanation
10. What happens to the temperature of H2O while changing from ice to liquid H2O.?
it will increase because matutunaw kasi young ice tapos maginging tubig ulit
11. how many molecules of h2o are there in 2 moles of h2o
Just like the dozen and the gross, it is a name that stands for a number. There are therefore 6.02 × 10 ²³ water molecules in a mole of water molecules.
12. Which statement about the critical point of h2o and supercritical h2o is true?
Answer:
H2O is the chemical formula of water. It means that each molecule of water is made up of two hydrogen atoms, indicated by the letter H, and a single oxygen atom, represented by the letter O. Water is chemical substance with no smell, taste or color.
Explanation:
sandro marcos
13. What is the most important compound in human body? A. H2O and NaCl B. H2O and NAOH C. NH3 and H2O D. HCl and H20
Answer:
D HCI AND H20
Explanation:
Wala feel ko lang
14. How many molecules of h2o are there in 0.75 mol of h2o
Answer:
- the molecules of h2o are there in 0.75 mol of h2o is
4.52 x 10²³
15. How many molecules of H2O are there in 0.75 mol of H2O?
Explanation:
How many molecules are in 0.75 moles?
Part of a video titled Q21 What is the number of molecules in 0.75 moles of Nitrogen? - YouTube
0:32
0:59
Within 0.75 mole may I have a guide rows number multiplied by 0.75 J molecules only that is four point one four five and six five multiplied by 10 raised to the power 23. Molecules you.
16. A mixture of na2co3 and baco3 weighing 0.2000 g requires 30.0 ml of 0.1000n acid for complete neutralization. what is the percent of each component in the mixture
Answer:
Sodium carbonate reacts with hydrochloric acid:
N
a
2
C
O
3
(
s
)
+
2
H
C
l
(
a
q
)
→
2
N
a
C
l
(
a
q
)
+
C
O
2
(
g
)
+
H
2
O
(
l
)
We can find the number of moles of
HCl
before the reaction.
We then use the titration result to find the number of moles remaining after the reaction.
By subtracting the two we can get the number of moles of
HCl
which have reacted.
From the equation we can find the number of moles of
Na
2
CO
3
.
From this we get the mass of
Na
2
CO
3
.
We can then work out the percentage purity.
Concentration = moles of solute / volume of solution.
c
=
n
v
∴
n
=
c
×
v
∴
Initial moles of
H
C
l
=
0.1280
×
50.00
1000
=
6.400
×
10
−
3
The acid remaining is titrated with
NaOH
:
H
C
l
(
a
q
)
+
N
a
O
H
(
a
q
)
→
N
a
C
l
(
a
q
)
+
H
2
O
(
l
)
n
O
H
−
=
0.1220
×
30.10
1000
=
3.6722
×
10
−
3
Since they react in a 1:1 ratio the no. of moles of
HCl
must be the same:
n
H
C
l
=
3.6722
×
10
−
3
∴
The no. moles used up:
=
(
6.400
−
3.6722
)
×
10
−
3
=
2.7228
×
10
−
3
From the original equation you can see that the no. moles of
Na
2
CO
3
must be half of this.
∴
n
N
a
2
C
O
3
=
2.7228
×
10
−
3
2
=
1.3614
×
10
−
3
M
r
[
N
a
2
C
O
3
]
=
105.99
∴
m
a
s
s
N
a
2
C
O
3
=
1.3614
×
10
−
3
×
105.99
=
0.14429
g
∴
percentage purity
=
0.14429
0.3240
×
100
=
44.53
%
This technique is known as a "back titration".
17. Which of these is the correct equation for photosynthesis? a)O2 + C6H12O6 --> CO2 + H2O B)O2 + CO2 --> C6H12O6 + H2O c)CO2 + H2O --> O2 + C6H12O6 D)CO2 + H2O --> O2 + C6O12H6
Answer:
C. CO2+H2O > O2+C6H12O6
Explanation:
This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
18. How many molecules of H2O are there in 0.70 mol of H2O
Answer:
no. of H2O molecules = 4.2 × 10²³ molecules
Explanation:
no. of H2O molecules = 0.70 mol H2O × (6.022 × 10²³ H2O molecules / 1 mol H2O)
no. of H2O molecules = 4.2 × 10²³ molecules
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19. How many moles of water are present in 250g of ice?A. 13.9 mol H2OB. 14.9 mol H2OC. 15.9 mol H2OD. 16.9 mol H2O
Answer:
Ice is water, in solid form
# mols H2O in 250 g H2O(s) = 250 g H2O(1 mol H2O/18 g H2O)
[n = 250 grams ÷ 19.0 g/mol] = 13.9 moles.
So therefore the answer is A.
20. 8. C3H8 + 02 → CO2 + H2O + 9. Fe + H2O → H2+ Fe3O4
e calculator nyo po. thank you
21. how many molecules of h2o are there in 7.0 moles of h2o?
Answer:
omsim barabida omsim barabida omsim
22. balancing equal equations H2O +H2O +O2
inlove ako kase mahal ko sya
23. balance the equations1.SnO2 + H2 → Sn + H2O2.Na + H2O → NaOH + H2O
Answer:
1.) SnO2 + 2H2 → Sn + 2H2O
2.) 2Na + 2H2O → 2NaOH + H2
Explanation:
24. which is the correct representation of the reaction a.CaO+H2O-----Ca+H30 b. CaO+H2O-----Ca(OH)2 c. 2Cao+H2O------Cao d.Ca(OH)2----CaO+H2O
Answer
B. CaO+H2O=Ca(OH)2.
25. determine the number of h2o molecules in 56.12 g of h2o
Answer:
h2o means water h2o hydrogen and oxygen
26. identify the possible intermolecular force attraction of H2O-----H2O
Answer:
The H2O water molecule is polar with intermolecular dipole-dipole hydrogen bonds. As the water molecules attract each other and form bonds, water displays properties such as high surface tension and a high heat of vaporization.
HOPE IT HELPS ❤
27. How many molecules of h2o are there in 9.75 mol of h2o
Answer:
9.5 x 1023 / 6.02 x 1023 = 1.58 moles H2O.
Explanation:
Converting from number of molecules to moles is easy as long as you know that 1 mole = 6.02X1023 molecules. This is true for any substance. If we have 9.5 x 1023 water molecules, we divide that by 6.02 x 1023 to get the number of moles
Answer:
Converting from number of molecules to moles is easy as long as you know that 1 mole = 6.02X1023 molecules. This is true for any substance. If we have 9.5 x 1023 water molecules, we divide that by 6.02 x 1023 to get the number of moles: 9.5 x 1023 / 6.02 x 1023 = 1.58 moles H2O.
Explanation:
pa brainlest nalang po
28. Which of the following shows the balanced equation for the reaction that represents the decomposition of barium carbonate (baco3)?
QUESTION:
Which of the following shows the balanced equation for the reaction that represents the decomposition of barium carbonate (BaCO₃)?
ANSWER:BaCO₃ → BaO + CO₂
[tex]\\[/tex]
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29. 1.53g NaCI100 gH202.27gNaci100g H2O3.16g NaCI100g H2O4.7g NaCI100g H2O5.18g NaCI100g H2O
Answer:
anong oras magsisimula qng patimpalak
30. How many molecules are there in 1.5 moles of water? a. 9.03 x 1023 molecules H2O b. 9.03 x 1023 atoms H2O c. 0.90 x 1024 molecules H2O d. 90.3 x 1024 atoms H2O
Answer:
A. 9.03 ...
Explanation:
Sana makatulong
