Answer:
[tex]\boxed {\boxed {\sf 110.98 \ g/mol}}[/tex]
Explanation:
The molar mass is the mass of a substance in grams per mole.
To find it, add the mass of each element in the compound. These masses can be found on the Periodic Table.
The compound given is:
[tex]CaCl_2[/tex]
The compound has 1 Ca (calcium) and 2 Cl (chlorine).
Mass of Calcium
The molar mass of calcium is 40.08 g/mol There is only one atom of Calcium in CaCl₂, so the number above is what we will use.Mass of Chlorine
The molar mass of chlorine is 35.45 g/mol There are two atoms of chlorine in CaCl₂, therefore we need to multiply the molar mass by 2. 35.45 * 2= 70.9 g/molMolar Mass of CaCl₂
Now, to find the molar mass, add the molar mass of 1 calcium and 2 chlorine. 40.08 g/mol + 70.9 g/mol =110.98 g/molThe molar mass of CaCl₂ is 110.98 grams per mole.
The __________ system is responsible for bringing oxygen into the lungs and releasing carbon dioxide from the body
Answer:￣ﾉﾞ(｡･∀･)ﾉﾞo(*￣▽￣*)ブ(*￣3￣)╭o(*￣▽￣*)ブ(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭•)>⌐)↖↗↘↙↜↚↯↟↝↖↔↕↙↘↙↘↘↞↴↯↚↨⇌⇋⇆⇉⇑↶⇋⇋↳¾⁷¼¼⁶⁴⁷⁰⁰⁰⁹⅕⅘⅓⅕⅓⅕⨊⨡⨔⨩⨦⨶⨼⨿⨷⨷⨻⨼⨹₴ The answer is resperitory
Explanation:
When using a light microscope, focus the specimen with the scanning objective
lens first.
Reasoning:
Answer:
The light microscope bends a beam of light at the specimen using a series of lenses to provide a clear image of the specimen to the observer.
what are the three things transported by global ocean circulation?
Answer:
The produce large circular currents in all the ocean basins. Currents, The North Equatorial Current, the Gulf Stream, the North Atlantic Current, and the Canary Current.
Explanation:
EMERGENCY!!! Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers
Answer:
A. the valence electrons
Explanation:
Answer:
The valence electrons
Explanation:
The valence electrons determine an element's properties because chemical properties of each element are determined by the element's electronic configuration and PARTICULARLY by its outermost valence electrons. I hope it helps!
~Good luck
Agl + Na25 yields Ag2S + Nal
Explanation:
Agl+hih+356bnh$&56DG hug zero cg hydh hod sir un bucks
Two substances in a mixture differ in density and particle size. theses properties can be used to
Answer:
option 1. Two substances in a mixture differ in density and particle size. These properties can be used to separate the substances. These properties can be manipulated in order to have a better separation between the two substances.
Explanation:
Answer:
Two substances in a mixture differ in density and particle size. These properties can be used to separate both of them using the separating funnel or using filtration (filter paper).
Explanation:
Since their densities are different, one substance should float above the other in the mixture which allows for the separating funnel to let the substance sinking below (with the heavier density) to flow out first before changing the beaker to let the lighter substance flow out.
The substance with a bigger particle size would not be able to pass through the filter paper unlike the substance with the smaller particle size as the filter paper's pores is not big enough for it to pass through, separating both substances (with one on the paper and the other outside the filter paper, preferably in the beaker placed below the paper).
A student heats a 2.5 g sample of calcium carbonate in a test tube. What mass of calcium oxide remains in the test tube when the reaction is complete?
CaCO3(s) = CaO(s) + CO2(g)
Select one:
a. 1.4 g CaO
b. 2.1 g CaO
c. 2.5 g CaO
d. 1.0 g CaO
Answer:
1.4 g CaO
Explanation:
Given data:
Mass of calcium carbonate = 2.5 g
Mass of Cao remain in tube = ?
Solution:
Chemical equation:
CaCO₃ → CaO + CO₂
Number of moles of CaO:
Number of moles = mass/molar mass
Number of moles = 2.5 g/ 100 g/mol
Number of moles = 0.025 mol
now we will compare the moles of CaO with CaCO₃.
CaCO₃ : CaO
1 : 1
0.025 : 0.025
Mass of CaO:
Mass = number of moles × molar mass
Mass = 0.025 mol × 56 g/mol
Mass = 1.4 g
Answer:
1.4g CaO
Explanation:
Did the exam and got it right. Hope this helps
For complete combustion of an organic compound needs 8 molecules of oxygen, what could the formula of this compound be?
Answer:
C5H12.
Explanation:
The compound will be C5H12.
Now consider the general formula for the combustion of an alkane;
CnH2n+2 + 3n+1/2O2-----> nCO2 + (n+1) H2O
If we substitute n=5, we have;
C5H12 + 8O2-----> 5CO2 + 6H2O
Hence the answer above.
what happens when exhaled air passes through clear lime water?
2CuO+2NH3------ 3Cu + 3H2O+ N2. Given that the relative molecular mass of copper oxide is 80, what volume of ammonia is required to completely reduce 120 g of Copper oxide? ( Cu=64, O=16, N=14)
Volume of Ammonia(NH₃) = 22.4 L
Further explanationGiven
Reaction
3CuO+2NH₃⇒ 3Cu + 3H₂O+ N₂
In the problem, the CuO coefficient should be 3 not 2
M CuO = 80
mass CuO = 120 g
Required
The volume of NH₃
Solution
mol CuO :
[tex]\tt mol=\dfrac{mass}{M}\\\\mol=\frac{120}{80}\\\\mol=1.5[/tex]
From the equation, mol ratio CuO : NH₃ = 3 : 2, so mol NH₃=
[tex]\tt \dfrac{2}{3}\times 1.5=1~mol[/tex]
Assume at STP(0 °C, 1 atm) ⇒1 mol = 22.4 L, then volume of NH₃=22.4 L
SOMEONE HELP ME PLEASE ILL GIVE BRAINLY
What is this called? it might be sideways but it show look like a Y
Answer:
I'm thinking it might be Element 39: Yttrium, as this is Chemistry.
Explanation:
help me i put max points
Answer:
D. Catastrophism
Explanation:
Answer:
Catastrophism is the answer :p lol
Explanation:
A local plant nursery uses large sprinklers to water the plants twice a day. The water contains phosphorus, which is a fertilizer that helps plants grow. Some of the water becomes runoff and ends up in nearby streams and lakes. This is an example of which type of short-term human-induced environmental change? eutrophication
Answer:
It’s eutrophication
Explanation:
There is no way it can be DEFORESTATION or NON SUSTAINABLE SPECIES
Non sustainable harvesting has something to do with animals and eutrophication means adding excessive nutrients
Answer:A.
Explanation: I took the test, sorry if this is incorrect
3. Calculate the number of moles and mass in
gram_of_1 x 10^20mdecules of Nz gas
.
Answer:
0.17×10⁻³ mol
Mass = 0.00476 g
Explanation:
Given data:
Number of molecules of N₂ = 1 ×10²⁰ molecules
Number of moles of N₂ = ?
Mass in gram of N₂ = ?
Solution:
1 mole of any substance contain 6.022×10²³ molecules
1 ×10²⁰ molecules× 1 mol /6.022×10²³ molecules
0.17×10⁻³ mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 0.17×10⁻³ mol × 28 g/mol
Mass = 4.76×10⁻³ g
Mass = 0.00476 g
A molecule contains 24.36 g of nitrogen and 62.64g of sliver
Answer:
This molecule is AgN3
Explanation:
Answer:
AgN3
Explanation:
Mass of nitrogen N is given as 24.36 g
Molar mass of nitrogen N= 14 g/mol.
amount of substance in mol of N = mass/molar mass
=24.36 g/ 14 g/mol.
=1.74 mol.
Given mass of silver= 62,64 g.
Molar mass of silver Ag=107.87 g/mol
Number of mols=62.64 g ÷ 107.87 g/mol.
=0.58 mol.
Ratio of number of mol of N and number of mols of Ag = 1.74 mol / 0.58 mol
=3:1
Hence, empirical formula is AgN₃.
PLEASE HELP
Fossil fuels are burnt in power plants to produce electricity. Which one of the
following sequences show the correct order of energy transformation?
Answer:
a
Explanation:
Chemical then thermal because the carbon emissions produce heat
Then kinetic because there is energy transfer then electric because that's the finished result
12.3 moles of sodium is what mass of Na?
Answer:
1 mole of Na = mass of 22.99 g, 1 mole of Si = mass of 28.09 g.
What is the name of each labeled part?
Answer:
A - dendrites
B - cell body
C - axon terminal
D - myelin sheath
E - nucleus
Hope that helps.
A-dendrite
B-cell body
C-axon terminal
D-axon
E-nucleus
What is it called when elements combine to form a chemical compound?
Explanation:
A compound is a unique substance that forms when two or more elements combine chemically.Compounds form as a result of chemical reactions. The elements in compounds are held together by chemical bonds. A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons.hope it helpful ✌️✌️
Find three examples of synthetic compounds that contain aromatic rings. Indicate their source or importance
Answer:
Viagra, Cialis, and Levitra each contain aromatic rings.
They are all ED pills and come from drug manufacturing laboratories (you said "synthetic").
Explanation:
Whic statements explain why rocks weather at different rates? Check all that apply
Explanation:
Weathering occurs one of three ways: through physical processes such as freezing and thawing, because of live organisms whose roots break rocks or through chemical processes that occur when carbon dioxide in the soil and air and mixes with water and specific minerals in rocks to form a weak acid that reduces rocks into silt, soil and sediment.
Chemical weathering typically increases as temperatures rise and rain falls, which means rocks in hot and wet climates experience faster rates of chemical weathering than do rocks in cold, dry climates.
Read all above and you may just find your answer!“True or False”
Unsaturated solution contains the maximum amount of solute dissolved by a given amount of solvent
ANSWER- True
EPLANATION
What is the minimum number of kiloJoules needed to change 40.0 grams of water at 100C to steam at the same temperature and pressure
Answer:
90.4Kg
Explanation:
The energy required= latent heat of vaporization
Latent heat of vaporization of water= 2260 KJ/Kg
Mass of water = 0.04 Kg
Heat required= 0.04Kg× 2260 KJ/Kg
Heat required= 90.4Kg
Answer: The minimum number of kilo Joules needed is 90.4KJ.
Explanation:
The energy required= latent heat of vaporization.
Latent heat of vaporization of water= 2260 KJ/Kg
Mass of water = 0.04 Kg
Heat required= 0.04Kg× 2260 KJ/Kg
Heat required= 90.4KJ.
Learn more: https://brainly.com/question/2477358
What is the rise in sea level between 1930 and 2003?
A)
About 20cm
B)
About 16cm
C
About 12cm
Answer:
about 16
Explanation:
its 20 - ( approximately 5)
= approximately 16
Answer:
It should be (C) about 12cm
i need to know what occupied vs full means for chemistry
A ______ square is a diagram used to predict all possible allele combinations from a genetic ______. Using this diagram, the phenotypes of offspring can be determined from the genotypes.
Answer:
A Punnet Square...the second I am not sure.
Explanation:
Unfortunately the second could be many things. You'd have to have more background information.
Answer:
PUNNETT....,MAKE SURE U HAVE 2 T,s
Explanation:
punnett and cross
What math is used to find density?
Answer:
[tex]\huge\mathtt{{\colorbox{silver}{ANSWER~~~↴}}}[/tex]
Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
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Methane(CH4) is a gas at room temperature, Methanol (CH3OH) is a liquid. Explain why using types of intermolecular forces present.
Explanation:
Methane is a gas at room temperature but methanol is a liquid because in methane there's London dispersion intermolecular force but in methanol there's H-bond and London dispersion force. H-bond is more stronger than London dispersion force. So, it increases the boiling point of methanol that's why methane is gas at room temperature due to weak attraction of London dispersion force and methanol is liquid.
Methanol has a higher boiling point than methane due to stronger intermolecular forces (IMFs), or attraction between individual molecules. This makes its molecules more difficult to separate, requiring more energy and resulting in a higher boiling point.
What are intermolecular forces?An intermolecular force is a force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of neighboring particles, such as atoms or ions.
Intermolecular forces are classified into five types namely,
Ion-dipole forces.Ion-induced dipole forces.Dipole-dipole forces.Dipole-induced dipole forces.Induced dipole forces.Between ions and polar dipole molecules, ion-dipole forces exist.
Since of stronger intermolecular forces (IMFs), or attraction between individual molecules, methanol has a higher boiling point than methane.
This makes it more difficult to separate its molecules, requiring more energy and resulting in a higher boiling point.
Thus, this is the reason of using types of intermolecular forces present.
For more details regarding intermolecular forces, visit:
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Order the following elements from Highest to Lowest Electronegativity.
K, Sc, Ca, Zn, Br
Sc, K, Br, Zn, Ca
OK, Ca, Sc, Zn, Br
O Br, Zn, Sc, Ca, K
Ca, Zn, Br, K, SC
Answer:
O, Ca, Zn, Br
Sc, K, Br,
Explanation:
The correct order of the chemical elements from highest to lowest electronegativity is: C. Br, Zn, Sc, Ca, K.
Electronegativity refers to a measure of the ability of an atom of a chemical element to attract any shared pair of electrons.
Generally, the electronegativity of a chemical element typically increases across the period from left to right.
In Chemistry, the electronegativity of some of the chemical element are:
Bromine (Br) = 2.96Calcium (Ca) = 1.0Zinc (Zn) = 1.65Potassium (k) = 0.82Scandium (Sc) = 1.36Hence, the order of the chemical elements from highest to lowest electronegativity is:
1. Bromine (Br) = 2.96
2. Zinc (Zn) = 1.65
3. Scandium (Sc) = 1.36
4. Calcium (Ca) = 1.0
5. Potassium (k) = 0.82
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