For a (unbalanced) reaction: NaOH +CO2-Na2CO3 + H2O, the moles of NaOH and moles of each product are formed are mathematically given as
a) Moles of NaOH =44.05
b) Moles of Na2CO3=21.0
Moles of H2O= 21.0What is the moles of NaOH and what moles of each product are formed?
Generally, the equation for the Chemical reaction is mathematically given as
2 NaOH(aq)+ CO2(g)------> Na2CO3(aq)+ H2O(l)
Therefore
Moles of CO2= 925/44
Moles of CO2=21.0
Hence
Moles of NaOH = 2 x Moles of CO2
Moles of NaOH = 2x925/44
Moles of NaOH =44.05
In conclusion
Moles of Na2CO3 925/44
Moles of Na2CO3=21.0
And
Moles of H2O= 925/44
Moles of H2O= 21.0
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(ii) Explain why magnalium is harder than aluminium.
Answer:
Magnalium is stronger than aluminium alone but still has a low density.
Explanation:
How many particles are there in 3 moles of Ag?
Answer:
6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules
Explanation:
6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules
Hi
Can someone explain the second marking point?
Why is it bubbles of air and not C02?
What are renewable resources?
Answer:
Renewable sources are something that can be renewed like
Plants
Trees
etc
uh
Explanation:
Non-renewable for example is you cant renew them at all
there built by the earth themselfs
Like
cole
gemstone
Steel
Metal
etc
How to pay taxes I MEAN
Before balancing this equation, how many oxygen atoms are present on the product side of the following equation:
Answer:
3
Explanation:
co2 has 2 and h2o has 1
product is right side
An atom of lead has a mass of 17.6 times greater than the mass of an atom of carbon-12. What is the molar mass of this isotope of lead?
Answer:
211.2g/mol
Explanation:
[tex]mass \: of \: carbon = 12 \\ mass \: of \: lead = 12(17.6) \\ = 211.2gmol {}^{ - 1} [/tex]
Why can’t sodium metal be manufactured by the electrolysis of brine?
Answer:
Explanation:
The quick and short answer to this question is that the moment it is made into Na (the atom) the moment that happens, Na will react with water to become NaOH. Sodium is very responsive to water.
Equation
2Na + 2HOH ====> 2NaOH + H2
Use the molar volume to calculate the number of moles of CO2 in 4.00L of CO2 gas at STP.
The number of moles will be 0.178 moles. It can be calculated by ideal gas law.
What is ideal gas law?The ideal gas law gave the relationship between pressure, volume as well as temperature. It can be expressed as:
PV =nRT
Where, P is pressure, V is volume and T is temperature.
Calculation of number of moles by using ideal gas law.
Put the value of given data in above ideal gas law formula.
n = PV / RT
n = (1 atom × 4 L)/ (0.0821 × 273 K
n = 0.178 moles.
Therefore, the number of moles will be 0.178 moles.
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What is the numbers of molecules for 65.8g of CO2?
Answer:
8.98*10^23 molecules CO2
Explanation:
The molar mass of CO2 is 44.0 grams/mol. If we convert 65.8 grams of CO2 into moles, 65.8g CO2 / 44.0g CO2 then we get about 1.49 moles of CO2. We know there are 6.02*10^23 molecules in a mole, so we would just multiply 1.49 mol CO2 * 6.02*10^23 = 8.98*10^23
Balance the following equation.
( ? )NaCl + ( ? ) AgNO3 → ( ? ) AgCl + ( ? ) NaNO3
Balanced equation:
NaCl + ( 1 ) AgNO₃ → ( 1 ) AgCl + ( 1 ) NaNO₃
(aq) (aq) (s) (aq)
Both the sides are already balanced
One-fourth of a gaseous mixture is Argon and 3/4 of the gas is Oxygen. The total pressure in the container
is 8 atmospheres. What is the partial pressure of the Argon?
Answer:
nose
Explanation:
xde
MATH AND SCIENCE
Out of around 260,000 known species of angiosperms, approximately 195,000 are dicots. what percentage of angio sperms are dicots
Answer:
Explanation:
Formula
% = (dicots/angiosperms) * 100
Givens
angiosperms (total) = 260000
Dicots = 195000
Solution
% = (195000/260000) * 100
% = 0.75 * 100
Answer: % = 75% are dicots
Which type of stars have the highest luminosity?
A. main sequence
B. blue giants
C. red super giants
D. BOTH blue giants and red super giants
Answer: Red supergiant.
Explanation:
The stars in group C are even more luminous than the giants. These are super giants, the largest of stars with extremely high luminosisties. A red supergiant such as Betelguese would extend beyond the orbit.
Choose the answer that describes the hierarchy among these three body regions.
A. The oral region is part of the facial region, and the facial region is part of the cephalic region.
B. The cephalic region is part of the facial region, and the facial region is part of the oral region.
C. The cephalic region is part of the facial region, and the facial region is part of the manual region.
D. The oral region is part of the cephalic region, and the cephalic region is part of the facial region.
Answer:
letter: B
Explanation:
thats is the true answer.
pleas heart my heart my answer
12)
What are the products of photosynthesis?
A)
glucose and oxygen
B)
carbon dioxide and water
C)
carbon dioxide and oxygen
D)
glucose and carbon dioxide
Calculate the volume that 3.
60g H2 gas will occupy at stp
Answer:
mass over molarmass ×volume
90
What is the scientific word used to describe the process of the protein in the eggs changing form?
Answer:
Denaturation
Explanation:
HELP PLS ASAP
how many liters of CO2 are produced when 32.6 liters of propane gas C3H8 reacts with excess oxygen at STP?
C3H8 + 5O2 > 4H2O + 3CO2
▲ Two general chemistry students working together in the lab weigh out 0.832 g of CaCl2 2 H2O into a crucible. After heating the sample for a short time and allowing the crucible to cool, the students determine that the sample has a mass of 0.739 g. They then do a quick calculation. On the basis of this calculation, what should they do next? (a) Congratulate themselves on a job well done. (b) Assume the bottle of CaCl2 2 H2O was mislabeled; it actually contained something different. (c) Heat the crucible again, and then reweigh it.
After heating the crucible, cooling, and weighing the sample as 0.739 g, the students should have heated the crucible again and then reweigh the sample until a constant weight is obtained.
Drying samples with cruciblesThe sample being heated, CaCl2 2 H2O, contains water of hydration.
In order to arrive at an anhydrous sample of the salt, all the water molecules must be completely evaporated off by heating.
To do so, the sample should have been heated to constant weight by repeated heating and weighing until there is no longer a change in the weight of the sample.
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given scientific reason for Nacl dissolves in water
Answer:
Matter is made-up of minute particles. Minute particles of matter have space between them.
So, when common salt is added to water, the particles of salt get into the space between particles of water.
Hence, common salt (Table salt) dissolves in water.
Consider the nuclear equation below.
Na-
22Ne +98
0
10
Which is the missing value that will balance the equation?
O-1
O 0
O +1
O +2
Answer:
+1
Explanation:
Titanium is a transition metal used as pins and plates to support badly broken bones. Titanium is extracted from an ore that
contains the mineral titanium oxide. This oxide is converted into titanium chloride. Titanium chloride is heated with sodium to
form titanium metal. This reaction takes place in an atmosphere of a noble gas, such as argon
4Na(s) + TICIO
Ti(s) + 4NaCl(s)
Calculate the mass of titanium that can be extracted from 570 kg of titanium chloride.
Relative atomic masses:
CI 35.5
Ti 48
What is the Mass of titanium (g)
Using the stoichiometry of the balanced chemical reaction, the mass of the Ti is 144Kg.
What is a chemical reaction?The term chemical reaction refers to the combination of two or more substances to yiled one or more products.
The reaction equation here is; 4Na(s) + TICI4---->Ti(s) + 4NaCl(s)
Number of moles of TiCl4 = 570 * 10^3g/190 g/mol = 3000 moles
If 1 mole TiCl4 produces 1 mole of Ti
3000 moles of TiCl4 produces 300o moles of Ti
Mass of Ti produced = 3000 moles * 48 g/mol = 144Kg
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Use the periodic table to answer the questions below.
Which diagram shows the correct electron
configuration for nitrogen (N)?
atomic mass for N = 7
electron configuration: 1s²2s²2p³
orbital diagram:
↑↓ ↑↓ ↑ ↑ ↑
1s² 2s² 2p³
Laura sees a horse pulling a buggy.
Which statement best describes the forces acting on the horse and buggy?
The net forces exerted on the horse and cart are the same, but the action force is larger.
The net forces exerted on the horse and cart are the same, but they are in the same direction.
The net forces exerted on the horse and cart are not the same, so the two forces cancel out.
The net forces exerted on the horse and cart are not the same, so they are not balanced forces.
Answer:
B
Explanation:
I think that the anserw is B.
How many moles of water are produced from the decomposition of 3.4g of hydrogen peroxide, H2O2
Answer:
0.1 moles
Explanation:
3.4 g * (1 mol/34 g) = 0.1 moles
Write the full electron configuration for phosphorus, atomic symbol P
Answer:
The electronic configuration for Phosphorus(P) is 1s2,2s2 2p6, 3s2 3p3
Which one of the following pairs of atoms would form a non-polar covalent bond?
a. Cl and C1
b. Na and Cl
C. C.and o
d. N and O
What do these 2 changes have in common?
Both are only physical changes.
Both are caused by heating.
Both are chemical changes.
Both are caused by cooling.
Answer:
Both are caused by heating. Both are Chemical changes.
Explanation:
Water evaporates from the Sun's heat and is transformed into a gas. Sediment is the particles of an object. When heat hits it, it starts breaking up, or in dry cases, heating and cracking.
Based on the following data, what is the I-I bond energy?
[tex]\frac{1}{2}[/tex]H2(g) + [tex]\frac{1}{2}[/tex]I2(g) → HI(g); ΔH = 26.36 kJ
Bond Bond Energy (kJ/mol)
H-H 435
H-I 295
A) 208 kJ/mol
B) 155 kJ/mol
C) 365 kJ/mol
D) -208 kJ/mol
E) -155 kJ/mol
Answer:
please you left that of I2 gas
Finally, examine the atomic spectrum below. Estimate the wavelength
of each spectral line, then use that collection of wavelengths to try and
determine the identity of the element using the internet. This is the
kind of work a graduate student in chemistry might be assigned to do.
400
450
500
650
700
750
550 600
wavelength (nm)
Identity of the element
The estimated wavelengths and identities of the elements of spectral line in the given atomic spectrum is:
blue spectral line - 470 nm; Iron green spectral line - 490 nm; Magnesium yellow spectral line - 610 nm; Sodiumred spectral line - 660 nm; HydrogenWhat is an atomic spectrum?Atomic spectrum is the spectrum of frequencies or wavelengths of radiations absorbed or emitted when electrons transitions between on energyblevel to another.
The estimated wavelengths as well as identities of the elements of spectral lines shown above are as follows
blue spectral line - 470 nm; green spectral line - 490 nm; Ironyellow spectral line - 610 nm; Sodiumred spectral line - 660 nm; HydrogenTherefore, the wavelengths and colors of the spectral line in an atomic spectrum is useful in identifying elements.
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