Answer:
4.5moles
Explanation:
Given parameters:
Mass of Na₃P = ?
Unknown:
Number of moles = ?
Solution;
The number of moles in a given substance can be derived from the expression below;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Na₃P = 3(23) + 31 = 100g/mol
Number of moles = [tex]\frac{450}{100}[/tex] = 4.5moles
a024
Object
Yepop (yp)
copper wire
132 yp
copper spoon 240 yp
glass jar
wooden spoon 240 yp
89 yp
1 point
8. A student believes she has measured a new property of matter that she
did not learn about in class. She calls her new property "Yepop". Above is a
table of Yepop measurements for different objects: Based on her results,
do you think "Yepop" is a property of matter?
A. No, because the copper objects have different measurements.
B. No, because the same substances have the same measurements.
C. Yes, because the spoons have the same measurements.
DESPERATE WILL GIVE BRAILIST AND THANKXS
Which statement is true about a rock layer deposited on top of another rock layer?
A- It is younger than the rock layer below.
B- It is older than the rock layer below.
C- It is the same age as the rock layer below.
D- It is no different than the rock layer below
Hello there!
Your answer is C.
Answer:
The right option is; A. It is younger than the rock layer below.
Explanation:
A rock layer deposited on top of another rock layer is younger than the rock layer below. This is based on the law of superposition which states that in any undeformed sequence of rocks that are laid down in layers, the youngest layer of rock will be on top of the sequence, while the oldest layer will be at the bottom of the sequence.
Complete each of these
The heat of fusion of a metal is 7.62 J/g at its freezing point of 592°F. How much energy is required to melt 257 g of this metal (already in 592°F)?
Answer:
7.62 plug into the equation for freezing
0= 592/7.62x x 90
0 = 77.69x x 90
x=0
therefore according to balton's law, it is required to have 0 + 27.222222222 (balton's number) to get the energy required.
answer is 27.222222 rounded 27. cheers.
Explain in your own words what the law of conservation of mass means
Answer:
Mass can neither be created nor destroyed in a chemical equation, it transfer from one to another form.
Explanation:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
DOING STUDY ISLAND, NEED HELP
Thermal energy is a form of... A. kinetic energy. B. electrical energy. C. potential energy. D. chemical energy.
Answer:
A. Kinetic Energy
Explanation:
Thermal energy is when the molecules and atoms are vibrating faster due to higher temperatures.
Kinetic energy fits this because the meaning of it is the energy of a moving object.
Since thermal energy comes from moving molecules and atoms, it is therefore a for of kinetic energy.
how are compounds Similar to elements and how are they different
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.
How do isotopes affect the average atomic mass of an element?
Answer:
The versions of an element with different neutrons have different masses and are called isotopes. The average atomic mass for an element is calculated by summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth.
Explanation:
What volume of oxygen will react with 50cm^3 of nitrogen monoxide?
Answer:
GIVE BRAINLIEST PLEASE!!! Answer - 50cm^3 of oxygen
Explanation:
They need (almost) equal amounts of substance to react
hope this helps <3
Someone please help will mark as brainliest
Answer: no you need a balance skall to make it the correct balance that you want. yes the hypothesis is correct because you change the balance with your balance scale so obviously it's going to make your hypothesis higher.
Explanation: I HOPE THAT HELPED.
Rank these elements from smallest to largest atomic radii: zinc, calcium, radium, and bromine.
Select one:
O a. calcium, radium, zinc, bromine
O b. calcium, zinc, bromine, radium
c. bromine, zinc, calcium, radium
d. bromine, zinc, radium, calcium
Answer:
The correct option is;
c. Bromine, zinc, calcium, radium
Explanation:
The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups
The location of each of the elements are;
Zinc: Period 4, Group 12
Calcium: Period 4, Group 2
Radium: Period 7, Group 2
Bromine: Period 4, Group 17
Therefore, the element with the largest atomic radius = Radium
The element with the smallest atomic radius = Bromine
Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc
The rank of the elements from smallest to largest atomic radius is therefore;
Bromine, zinc, calcium, radium.
how many moles of hydrogen are in 4.70 moles of C12H22O11
Answer:
103.4 moles of hydrogen
Explanation:
Given data:
Moles of C₁₂H₂₂O₁₁ = 4.70 mol
Number of moles of hydrogen present = ?
Solution:
one mole of C₁₂H₂₂O₁₁ contain 22 moles of hydrogen. Thus in order to determine total number of moles in 4.70 moles of C₁₂H₂₂O₁₁ we will multiply the 22 moles of hydrogen with 4.70 moles of C₁₂H₂₂O₁₁.
1 mole of C₁₂H₂₂O₁₁ = 22 moles of Hydrogen
4.70 × 22 moles
103.4 moles of hydrogen
This committee, known as the International Union of Chemistry (IUC), developed a specific set of rules for
chemists to follow. What were these rules called?
O
The nomenclature rules
O
The IUC rules
The Geneva rules
The Paris rules
Answer:
Nomenclature Rules
Explanation:
Answer: Its actually the geneva rules
Explanation:
Is this tinder like my guy
calculate the atomic mass of lead, if the mass of 0.2 mol of it equals 41.4 grams
The atomic mass of lead : 207 g/mol
Further explanationThe mass of this basic particle is expressed in atomic mass units
This atomic unit uses the standard atomic mass, that is, the C-12 isotope
1 atom C-12 = 12 atomic mass units
The atomic mass of an element (amu = u = g/mol) = the mass in grams of one mole of an element.
The mass of 0.2 mol of Lead equals 41.4 grams, so the atomic mass :
[tex]\tt \dfrac{41.4}{0.2}=207~g/mol[/tex]
Ung number three po plssssssssssss.
Answer:
For #3 I believe it's A
Explanation:
It can't be changed INTO a solid because it already is one.
Hope this helps!
How many moles of tungsten atoms are in 4.8x10^23 atoms of tungsten?
A. 1.3 x 10^-1 moles
B. 8.0 x 10^2 moles
C. 1.3 x 10^-2 moles
D. 8.0 x 10^1 moles
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.8 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.8}{6.02} \\ = 0.797342192 \\ [/tex]
We have the final answer as
8.0 × 10-¹ molesHope this helps you
Answer: D. 8.0 x 10^-1 moles
Explanation:
Why is soap mixed with water?
A. The soap becomes chemically active when mixed with water.
B. The soap turns the water molecules into a nonpolar solvent.
C. It covalently bonds to the water so it can be washed away.
D. Its polar end mixes with the water so it can be washed away.
The polar end of soap can be bonded with the polar end of water. Hence it can be mixed with water and can be washed away. Hence, option D is correct.
What is the action of soap in water?Soap is acting as a surfactant in water and oily surface of dirt. A lengthy chain of fatty acids is saltified with sodium or potassium to form a soap molecule. Soap is made up of two components: an ionic component and a long carbon chain.
The characteristics of the two molecules that make up soap are highly dissimilar. These two pieces are referred to as soap's hydrophobic tail dissolves in oils and is naturally water-repellent. It has an ionic makeup.
The second part hydrophilic head, or water-loving portion of the soap molecule, dissolves in water. It is composed of a very long hydrocarbon chain. Therefore, the hydrophilic head of soap molecule easily binds with water and can be washed away.
Find more on action of soaps:
https://brainly.com/question/27660538
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what is physical change?
Answer:
A physical change is any change in matter that involves the substance going from one physical state to another. The reference to a physical state involves solids, liquids, and gases.
Explanation:
what is the half life?
HELP BRAINLIEST
Answer:
the time taken for the radioactivity of a specified isotope to fall to half its original value.
What is the mass of 1.34x10^24molecules of Iron? *
Answer:
Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane
Explanation:
why estuaries are an important habitat for many marine organisms in comparison to the open ocean?
Answer:
There are more nutrients available in estuaries. There are more nutrients available in estuaries.
Explanation:
Oxygen in liquid form can be separated from air by
Chromatography
Simple distillation
Fractional distillation
Centrifugation
Answer:
Explanation:
Fractional distillation uses the different boiling points of the main elements of air. As the liquid air is heated, the elements change from liquid to gas and separate from one another. At this point, the carbon dioxide will become solid and drop from the cooled air, leaving nitrogen, oxygen and argon in the air.
Answer:
Fractional distillation
Explanation:
When you add so much solute that no more dissolves you have a(n)
Answer:
When you add so much solute that no more dissolves you have a SATURATED SOLUTION.
Answer:
iIt is called as point of saturation or saturated solution
In covalent bonding, electrons are shared within molecules. This is because..
A.) sharing allows them to achieve a noble gas configuration (octet).
B.) it allows them to become ions.
C.) it allows them to become more polar.
Answer:
You're answer is B.
Explanation:
Covalent Bonds share a negative and positive ion.
In covalent bonding, electrons are shared because sharing allows them to achieve a noble gas configuration. Therefore, option (A) is correct.
What is a covalent bond?A covalent bond is created by the equal sharing of electrons from both bonded atoms. The pair of electrons contributing to this type of bonding is known as shared pair.
Covalent bonds are also known as molecular bonds. Sharing of bonding pairs will make sure that the atoms attain stability in their outer shell as the atoms of noble gases.
Elements with very high ionization energies are not capable of transferring electrons and elements with very low electron affinity cannot accept electrons. Such atoms tend to share their electrons with the other atoms of the same element in a way that both atoms can achieve octet configuration in their valence shell.
This type of association through sharing of electrons between different or the same kinds is called Covalent Bond. Covalent bonds rarely dissociate spontaneously after formation.
Learn more about the covalent bond, here:
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Jaime calculates the density of a slab of aluminum (Al) metal.
What information does Jaime need to evaluate the accuracy of his calculation?
the accepted value for the density of aluminum
the dimensions of the slab of aluminum that he used
a bar graph that shows the densities of different slabs of aluminum
a line graph that shows how the density of aluminum varies with temperature
Answer: the accepted value for the density of aluminum
Explanation:
took the test
1 of 20
0 0%
In what form (solid, liquid or gas) is crude
oil found?
Enter your answer
Answer:
Gas
Explanation:
Because Crude oil can usually be found in the ground as a liquid and in the air is gas can be kerosene.
Calculate the new volume if in a container there is a mass of gas that occupies a volume of 1.3L at a temperature of 280K. Calculate the volume when reaching a temperature of 303K.
Answer:
1.4 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V1) = 1.3 L
Initial temperature (T1) = 280 K
Final temperature (T2) = 303 K
Final volume (V2) =?
With the above data, we can obtain the new volume of the gas by using the Charles' law equation as shown below:
V1 /T1 = V2 /T2
1.3/280 = V2 /303
Cross multiply
280 × V2 = 1.3 × 303
280 × V2 = 393.9
Divide both side by 280
V2 = 393.9/280
V2 = 1.4 L
Thus, the new volume of the gas is 1.4 L
Which of the following Best describes how a compound naturally occurs
Answer:for my ap3x test the answer was the molecular formula
Explanation:
Ap3x
Answer:
the molecular formula
a p e x
When electricity is passed through a common salt solution. Sodium hydroxide is
produced along with the liberation of the two gases X and Y. X burns with pop
sound whereas Y is used for disinfecting drinking water.
a) Identify X and Y
b) Give the chemical equation for the reaction stated above
c) State the reaction of Y with dry slaked lime,
Answer:
a)oxygen and chlorine
b) H20+NaCl= NaOH + O+ Cl
c) Cl2+ Ca(OH)2=CaOCl2+CaCl2 +HCL
Explanation:
electricity splits up the molecules for water and hydrogen displaces chlorine because its is more reactive.
