Mass of Calcium Carbonate = 500 grams
The required reaction would be:
CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl
Number of moles of CaCO₃:
Number of moles = given mass / molar mass
Number of moles = 500 / 100 [molar mass of CaCO₃ = 100g/mol]
Number of moles = 5 moles
Using the power of stoichiometry!!!
CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl
from the balanced reaction listed above, we can see that one mole of CaCl₂ and one mole of Na₂CO₃ produces one mole of CaCO₃
Moles of CaCl₂ = Moles of Na₂CO₃ = Moles of CaCO₃
we just solved for the number of moles of CaCO₃, which gives us
Moles of CaCl₂ = Moles of Na₂CO₃ = 5 moles
Hence, 5 moles of CaCl₂ and Na₂CO₃ each is required
NEED HELP ASAP PLEASE!
4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)
You need 16 moles of NO(g). How many moles of O2 do you need to start with?
Answer:
20 moles of o2
5 moles=4moles
?moles=16moles
Which of the following is the BEST description of a budget? *
10
Answer:
A budget is an estimation of revenue and expenses over a specified future period of time and is usually compiled and re-evaluated on a periodic basis. Budgets can be made for a person, a group of people, a business, a government, or just about anything else that makes and spends money.
Someone please help anyone who steals points will be reported
Answer:
ecosystem i think
The elements in the periodic table are not always represented by
the first one or two letters in their names. What are some examples of
this (list three)?
Unnillium (101)
Unnilbium (102)
Unniltrium (103)
Unnilquadium (104)
Unnilpentium (105)
Unnilhexium (106)
Unnilseptium (107)
Unniloctium (108)
Unnilennium (109)
Ununnillium (110)
Give an example to illustrate the difference between "paying more in taxes ” and paying a higher tax rate .
9.When two protons combine to form one nucleus, the result is one proton and one
neutron. How did the one proton become a neutron?
Answer:
josephmelichar
Explanation:
In the first step, 2 protons combine. In doing so one of the protons will convert into a neutron by losing a positron (positive electron) and a neutrino; this is also known as beta decay. This changes one of the protons (positive charge) into a neutron (neutral charge) and allows the two particles to combine.
How much energy is contained in the six-cookie serving size recommended on the label?
Monounsaturated Fat 1g
Please help I need the answer now!!!
Answer:
The answer is A: (more below)
Liquid A: Neutral
Liquid B: Acid
Liquid C: Base
Explanation:
Ph scale: 1 - 6 are acids, 7 is neutral, 8 - 14 are bases.
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Civic participation is best described as the act of
avoiding harming other community members.
meeting one's legal responsibilities.
voting in every type of election.
going above and beyond one's legal duties.
Which is one of Edwin Hubble’s findings that supports the big bang theory?
Answer:
meeting ones legal responsibility
How much energy (in J) is lost when a sample of iron with a mass of 28.3 g cools from 66.0 degrees celsius to 24.0 degrees celsius.
Answer:
Q = -535 J.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the lost energy according to the following and generic heat equation:
[tex]Q=mC(T_F-T_i)[/tex]
Thus, since the specific heat of iron is 0.450 in the SI units, we can plug in the mass and temperatures to obtain:
[tex]Q=28.3g*0.450\frac{J}{g\°C} (24.0\°C-66.0\°C)\\\\Q=-535J[/tex]
Regards
How many grams of NiNi are formed from 55.3 g of Ni2O3?
2Ni2O3(s)⟶4Ni(s)+3O2(g)
Answer:
39.2 g
Explanation:
2Ni₂O₃(s) ⟶ 4Ni(s) + 3O₂(g)
First we convert 55.3 g of Ni₂O₃ into moles, using its molar mass:
55.3 g ÷ 165.39 g/mol = 0.334 mol Ni₂O₃
Then we convert 0.334 Ni₂O₃ moles into Ni moles, using the stoichiometric coefficients of the balanced reaction:
0.334 mol Ni₂O₃ * [tex]\frac{4molNi}{2molNi_2O_3}[/tex] = 0.668 mol Ni
Finally we convert 0.668 Ni moles into grams, using its molar mass:
0.668 mol * 58.69 g/mol = 39.2 g
A gas mixture contains each of the following gases at the indicated partial pressures: N2, 231 torr ; O2, 101 torr; and He, 155 torr .
What is the total pressure of the mixture?
What mass of each gas is present in a 1.00 -L sample of this mixture at 25.0 degrees Celsius?
Enter your answers numerically separated by commas.
Answer:
P = 487 Torr
mN₂ = 0.347 g
mO₂ = 0.174 g
mHe = 0.0333 g
Explanation:
Step 1: Calculate the total pressure of the mixture
The total pressure of the mixture (P) is equal to the sum of the partial pressures of the gases.
P = pN₂ + pO₂ + pHe
P = 231 Torr + 101 Torr + 155 Torr = 487 Torr
Step 2: Calculate the moles of each gas
We have 3 gases in a 1.00 L container at 25.0 °C (298.2 K). We can calculate the number of moles using the ideal gas equation: P × V = n × R × T.
nN₂ = pN₂ × V / R × T
nN₂ = 231 Torr × 1.00 L / (62.4 Torr.L/mol.K) × 298.2 K = 0.0124 mol
nO₂ = pO₂ × V / R × T
nO₂ = 101 Torr × 1.00 L / (62.4 Torr.L/mol.K) × 298.2 K = 0.00543 mol
nHe = pHe × V / R × T
nHe = 155 Torr × 1.00 L / (62.4 Torr.L/mol.K) × 298.2 K = 0.00833 mol
Step 3: Calculate the mass of each gas
The molar mass of N₂ is 28.01 g/mol.
mN₂ = 0.0124 mol × 28.01 g/mol = 0.347 g
The molar mass of O₂ is 32.00 g/mol.
mO₂ = 0.00543 mol × 32.00 g/mol = 0.174 g
The molar mass of He is 4.00 g/mol.
mHe = 0.00833 mol × 4.00 g/mol = 0.0333 g
What is matter?
O A. Anything that has energy and motion
B. Anything that takes up space and has mass
C. Anything that can be seen
D. Anything that can be measured
Answer:
B.Anything that takes up space and has mass
Calculate the mass of sucrose needed to prepare a 2000 grams of 2.5% sucrose solution.
Answer:
50 g Sucrose
Explanation:
Step 1: Given data
Mass of solution: 2000 gConcentration of the solution: 2.5%Step 2: Calculate the mass of sucrose needed to prepare the solution
The concentration of the solution is 2.5%, that is, there are 2.5 g of sucrose (solute) every 100 g of solution. The mass of sucrose needed to prepare 2000 g of solution is:
2000 g Solution × 2.5 g Sucrose/100 g Solution = 50 g Sucrose
What element in group 1 is not considered an alkali metal?
A. Hydrogen (H)
B. Lithium (Li)
C. Potassium (K)
D. Cesium (Cs)
Answer:
A
Explanation:
Hydrogen isn't an alkali metal
Answer:
hydrogen
Explanation:
hydrogen is a gas not a metal
when aluminium and chlorine compared , which has smaller atomic size ? Why ?
aluminium has bigger atomic size than chlorine
because atomic radii decreases across the period and increases down the group
this law would hold owing to the fact that chlorine and aluminum are on the same period
What is sound? it is a form of energy produced by ____________.
A. conduction C. convection
B. radiation D. vibration
Answer:
D
Explanation:
sound is produced when the matter vibrates
Answer:
D
Explanation:
the sound that is made is basically energy. This energy we call it vibration
Which is the best description of a cyclone?
a dust storm
rapidly changing weather in an area
a type of tornado
an area of low air pressure
What does a velocity measurement include that a speed measurement does not?
time
direction
distance
acceleration
pls help i will mark brainliest Part D
Look back at your answer to part A. So far, you haven't added anything to the flask or removed
anything from it. Also, the contents of the flask have returned to the same temperature that they
were in part A. Considering the appearance of the solution in the flask, is the solution unsaturated,
saturated, or supersaturated? Explain your reasoning.
Answer:
Hello, Im Mack. Hope you're doing well. :)
Here is my Correct, custom answer for the lab Question, (I also took the same assignment and got a 100% score)
Explanation:
The heating of the sodium acetate solution made it change from super-saturated to un-saturated. Yet now that it cooled back to room temperature Im sure it is saturated. it wasn't able to disolve the excess sodium acetate left over at room temperature and had to be heated so now that it is back to room temperature I Think it will not disolve the sodium acetate left in the solution until it is heated again.
Hope this helped you out,
Please feel free to comment for further help, and I'll reply asap.
Have a great day my friend :)
If a medicine ball in a gym has a mass of 4.0 Kg, what is its weight?
Answer:
Weight = 0.4Explanation:
Given Information :
Mass = 4.0kg
Acceleration due to gravity = 10 m/s
Weight= ?
[tex]Weight = \frac{mass}{acceleration\: due \:to \:gravity} \\\\W= \frac{4.0}{10} \\\\W= \frac{2}{5} \\\\W=0.4[/tex]
In volcanic areas, groundwater heated by magma is a source of
a.
lava flows.
b.
silica.
c.
geothermal energy.
d.
pyroclastic flows.
Answer:I believe it is c.
Explanation:
Answer:
C., or "geothermal energy."
What is the mass of a sample of NH3 containing 7.20 x 1024 molecules of NH3? (5 points) Group of answer choices 203 grams 161 grams 214 grams 187 grams
Answer:
203 grams
Explanation:
The no. of moles of (6.3 x 10²⁴ molecules--Avagadros number) of NH₃ = (1.0 mol)(7.2 x 10²⁴ molecules)/(6.022 x 10²³ molecules) = 11.96 mol.
The no. of grams of NH₃ present = no. of moles x molar mass = (11.96 mol)(17.0 g/mol) = 203.3 g ≅ 203.0 g.
The answer is the mass of a sample of NH3 containing 7.20 x 1024 molecules of NH3 is 203 grams.
What is a molecule ?A molecule is a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.
6.02214076 × 10²³ molecules constitutes 1 mole of NH₃
7.20 x 10²⁴ molecules constitutes of
[tex]\rm\dfrac{7.20 \times 10^{24}}{6.02\times 10^{23}}\\[/tex]
=11.19 moles
1 mole of NH₃ = 17 gm
11.19 mole will be = 17 * 11.19
= 203 grams
Therefore the mass of a sample of NH3 containing 7.20 x 1024 molecules of NH3 is 203 grams.
To know more about molecule
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Mixed Practice:
For questions 6-9, you may not have to use your entire flow chart. Decide where to start and end using your flow chart.
4NH3 + 5O2 → 4NO + 6H2O
MM NH3 = 17.04 g/mol; MM O2 = 32 g/mol; MM NO = 30.01 g/mol; MM H2O = 18.02 g/mol
In the above reaction, how many moles of NO are formed if 824 g of NH3 react?
27.5 mol
3510 mol
48.4 mol
774 mol
Given
Mass of NO - 824 g
Molar mass of NO - 30.01g/mol
No of moles of NO = Given mass/Molar mass
No of moles of NO = 824/30.01= 27.45 mole
Hence 27.5 moles of NO are formed!
A blacksmith is in the process of making iron horse shoes. Each shoe, mass of 255.15g, is heated to a bright red (816c), hammered into shape, and then dropped into water to cool. If the bucket contains 4L of water (4000g) initially at room temperature (23c) what will the final temperature of the iron be? Specific heat of cast iron: 0.461 J/gC. Specific heat of water: 4.18 J/gC
Answer:
Explain
The Akautski is now assembled
The final temperature of the system can be calculated using calorimetric equation. The heat gained by water is equal to the heat lost by iron. Hence, the final temperature is 28 °C.
What is calorimetry ?Calorimetry is an analytical tool used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the heat energy q with mass m, specific heat capacity c and temperature difference ΔT is given as:
q = m c ΔT
Here, the heat lost by iron = heat gained by water
m of iron = 255.15 g
initial temperature = 816 °C
c = 0.461 J/°C g.
Mass of water = 4000 g
c = 4.18 J/°C g
initial temperature = 23 °C
Let T be the final temperature of the system.
then,
0.461 J/°C g × 255.15 g × (816 - T) = 4.18J/°C g × 4000 g × (T - 23)
117.62 J(816 - T) = 16720 (T - 23)
T = 28°C.
Therefore, the final temperature of the system will be 28°C.
Find more on calorimetry:
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Which 2 minerals are present in mafic igneous rock but not found
in felsic igneous rocks?
Answer: Mafic rocks are dominated by plagioclase and pyroxene (even if you can't see them with the naked eye) and smaller amounts of olivine. Intermediate rocks are roughly even mixtures of felsic minerals (mainly plagioclase) and mafic minerals (mainly hornblende, pyroxene, and/or biotite). There is little or no quartz.
HOPE THIS HELPS
A pure substance is:___.
a. composed of two or more different types of atoms or molecules combined in variable proportions.
b. composed of two or more regions with different compositions.
c. composed of only one type of atom or molecule.
d. composed of two or more different types of atoms or molecules that has constant composition.
e. none of the above.
Answer:
c. composed of only one type of atom or molecule.
Explanation:
Pure substances are the substances that could be made up of only one type of particles and also it contains fixed structure. They would be further categorized as the elements & compounds. It is an elements that only consist of only one type of atom or molecule
Therefore as per the given situation, the option c is the answer
Answer: correct answer is C
Explanation:
What is the mass of 564 liters of oxygen in kilograms?
A particle that has the electron configuration 1s²2s²2p³ would:
Have 2 filled orbitals and 3 partially filled orbitals.
Be able to bond with 2 hydrogens.
Have an electron configuration of a noble gas.
Have the electron configuration of an alkali earth metal.
Answer:
Have 2 filled orbitals and 3 partially filled orbitals.
Explanation:
Hello there!
In this case, according to the given information of the electron configuration for that particle; it is possible for us to infer it has 5 valence electrons, as the electrons on its outermost shell (2). Moreover, we undertand this particle needs three bonds, does not have neither the electron configuration of a noble gas which ends by p⁶ nor that of an alkali earth metal as it ends by s².
Therefore, we infer the correct answer is Have 2 filled orbitals and 3 partially filled orbitals because according to the Hund's rule, the s orbital is fulfilled and the p orbital has 1 electron orbital fulfilled and two partially filled orbitals.
Regards!
A sample of gas has an initial pressure of 1.5 atm, an initial volume of 3.0 L, and an initial temperature of 293K. If the final pressure is 2.5 atm and the final
temperature is 303K, what will the final volume be?
Answer:
1.9 L
Explanation:
Step 1: Given data
Initial pressure (P₁): 1.5 atmInitial volume (V₁): 3.0 LInitial temperature (T₁): 293 KFinal pressure (P₂): 2.5 atmFinal volume (V₂): ?Final temperature (T₂): 303 KStep 2: Calculate the final volume of the gas
If we assume ideal behavior, we can calculate the final volume of the gas using the combined gas law.
P₁ × V₁ / T₁ = P₂ × V₂ / T₂
V₂ = P₁ × V₁ × T₂ / T₁ × P₂
V₂ = 1.5 atm × 3.0 L × 303 K / 293 K × 2.5 atm = 1.9 L