Answer:
ch∪pαpi munαn0?
Explanation:
Question 2 (1 point)
An object's gravitational force depends primarily on the object's
a
density
mass
b
oc
momentum
Answer: An object's gravitational force depends primarily on the object's mass.
Explanation:
According to the Universal law of gravitation, every object whether is it is having large r small mass tends to exert a force on every other object, therefore this force is known as gravitational force.
Formula to calculate gravitational force is as follows.
[tex]F = \frac{G \times m_{1} \times m_{2}}{r^{2}}[/tex]
where,
F = Gravitational force
G = Gravitational constant = [tex]6.674 \times 10^{-11} m^{3}/kg s^{2}[/tex]
[tex]m_{1}[/tex] = mass of object 1
[tex]m_{2}[/tex] = mass of object 2
r = distance between the centers of the objects
Therefore, it means that gravitational force of an object primarily depends on an object's mass.
Thus, we can conclude that an object's gravitational force depends primarily on the object's mass.
If a particular ore contains 56.3 % % calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg k g of phosphorus?
Answer:
34.44 kg
Explanation:
First we convert 1.00 kg of phosphorus (P) into moles, using its molar mass:
1.00 kg ÷ 32 kg/kmol = 0.03125 kmol PThen we convert 0.03125 kmoles of P into kmoles of Ca₃(PO₄)₂:
0.03125 kmol P * [tex]\frac{2kmolCa_3(PO_4)_2}{2kmolP}[/tex] = 0.0625 kmol Ca₃(PO₄)₂Now we calculate the mass of 0.0625 kmoles of Ca₃(PO₄)₂:
0.0625 kmol Ca₃(PO₄)₂ * 310.18 kg/kmol = 19.39 kgFinally we calculate the required mass of the ore, using the definition of content percentage:
% content = Mass of calcium phosphate / mass of ore * 100 %56.3 % = 19.39 kg / mass of ore * 100%Mass of Ore = 34.44 kgWhich of these equations represent reactions that could be used in constructing an electrochemical c
Check all that apply
CH. +202 C02 +2H,0
Cr + Cu? → Cr?++ Cu
2 Ag*+Fe + 2Ag +Fe2
CI+Ag → AgCI
NH, *H* NH,
RETRY
Answer:
Cr+Cu2 -> Cr2+Cu
2Ag+Fe->2Ag+Fe2
Explanation: I did the assessment
An electric kettle uses electrical energy to boil water. Energy from the electricity is transferred to the water, heating it up. An electric ice maker also uses electrical energy, but it freezes water to form ice. Since energy can’t be created or destroyed, and water loses potential energy when it freezes to form ice, what happens to the energy put into the ice maker and the energy released by the water?
Answer:
Since energy can’t be created or destroyed, and water loses potential energy when it freezes to form ice. The energy remains electrical but then changes to kinetic when Enough energy is released.
Explanation:
The excess electrical energy gained by water during ice forming process is removed as potential energy to maintain law of conservation of energy.
According to the principle of conservation of energy, energy can neither be created nor destroyed but can transformed from one form to energy.
The electrical energy used by the ice maker to freeze water works on the same principle of conservation of energy.
The electrical energy absorbed the water is used to lower the temperature of the water in order to form ice by removing heat from the water in form of potential energy. This happens to maintain the principle of conservation of energy.Thus, the excess electrical energy gained by water during ice forming process is removed as potential energy to maintain law of conservation of energy.
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How many hydrogen atoms can be bonded to one carbon atom?
O A. 3
O B. 1
O C. 2.
O D. 4
Answer:
O D. 4
Explanation:
A carbon atom is an element that can be found in the atomic number 6th of the periodic table. It electronic configuration is 1s² 2s² 2p². It is a tetravalent and non metallic compound. In its outermost structure, Carbon needs four additional valence electrons to complete its octet structure. That is why hydrogen with only one electron can be bonded to one carbon atom in four different places making the carbon element obtain a tetrahedral shape.
Magnesium nitride, Mg3N, undergoes a thermo decomposition reaction to form magnesium metal and nitrogen gas.
a. True
b. False
Answer:
a. True
Explanation:
Magnesium nitride, Mg₃N, is a binary salt. Upon heating, it decomposes into magnesium metal and nitrogen gas. The unbalanced equation is:
Mg₃N(s) ⇒ Mg(s) + N₂(g)
We can balance it with the trial and error method. First, we will balance N atoms by multiplying Mg₃N by 2.
2 Mg₃N(s) ⇒ Mg(s) + N₂(g)
Then, we get the balanced equation by multiplying Mg by 6.
2 Mg₃N(s) ⇒ 6 Mg(s) + N₂(g)
240 g of water (specific heat = 4.186 J/g°C, initial temperature = 20°C) is mixed with an
unknown mass of iron (specific heat = 0.444 J/gºC, initial temperature 500°C). When
equilibrium is reached, the system has a temperature of 42°С. Find the mass of iron.
240 g of water (specific heat = 4.186 J/g°C, initial temperature = 20°C) is mixed with an unknown mass of iron (specific heat = 0.444 J/gºC, initial temperature 500°C). When equilibrium is reached,The answer for this would be 69.6
How do you find final temperature with specific heat?
You use q = mcΔT, but you assume aluminum = water and crack for This the final temperature.
We need to look up heat values (c) for aluminum and h20. This will uses 0.901 for aluminum and 4.18 use water
: (10)(130 - T)(0.901) = (200.0)(T - 25 (6)
Hence, The answer for this would be 69.6.
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pls help i need help help
Answer:
and is capillaries
Explanation:
hope it helps
to find the mass in g of 3 moles Al .
Answer:
81 gm
Explanation:
The mass of 1 mole is 27 gSo, Mass of 3 moles of Aluminium would be 3 × 27 = 81 gm
Thus mass of 3 Moles of Aluminium is 81 gm.
PLEASE HELP, DUE AT 12:00
If only 0.186 g of Ca(OH)2 dissolves in enough water to give 0.230 L of aqueous solution at a given temperature, what is the Ksp value for calcium hydroxide at this temperature?
Answer:
[tex]Ksp=5.20x10^{-6}[/tex]
Explanation:
Hello there!
In this case, according to the solubility equilibrium of calcium hydroxide:
[tex]Ca(OH)_2\rightleftharpoons Ca^{2+}+2OH^-[/tex]
Whereas the equilibrium expression is:
[tex]Ksp=[Ca^{2+}][OH^-]^2[/tex]
It is firstly necessary to calculate the molar solubility given the grams and volume of the dissolved solute:
[tex]s=\frac{0.186g/(74.09g/mol)}{0.230L}=0.0109M[/tex]
Now, according to the Ksp expression, we plug in s as the solubility to obtain:
[tex]Ksp=(s)(2s)^2\\\\Ksp=(0.109)(2*0.0109)^2\\\\Ksp=5.20x10^{-6}[/tex]
Regards!
According to the solution equilibrium,
[tex]Ca(OH)_2 \rightleftharpoons Ca^{2+}+2OH^-[/tex]Now,
The molar solubility will be:
→ [tex]s = \frac{\frac{0.186}{74.09} }{0.230}[/tex]
[tex]= 0.0109 \ M[/tex]
hence,
The Ksp value will be:
→ [tex]Ksp = (s)(2s)^2[/tex]
By substituting the values,
[tex]= (0.109)(2\times 0.0109)^2[/tex]
[tex]= 5.20\times 10^{-6}[/tex]
Thus the above approach is right.
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Kantahan moko sa lobby ml tayo babae 11 years old mayhem folow me 908723751 Mobile Legends Bang bang
Answer:
hi which language is this???
I can't understand
Answer:
Filipino hello pari omsim
Using the Lewis dot structures of magnesium and oxygen, predict the ionic formula
Answer:
(edit: nvm I figured it out, here is the answer)
Explanation:
Ions exists bound together in ionic formulae by electrostatic attraction then the ionic formula exists MgO.
What is meant by Lewis dot structures?The diagrams known as Lewis structures, also referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
A chemical compound comprehended as an ionic compound in chemistry exists one that contains ions bound together by the electrostatic forces named as ionic bonding. The molecule exists often neutral despite containing both positively and negatively charged ions, or cations and anions. Ions exists bound together in ionic formulae by electrostatic attraction.
Magnesium and oxygen:
Cation [tex]$=\mathrm{Mg}^{2+}$[/tex]
Anion [tex]$=\mathrm{O}^{2-}$[/tex]
Net charge = + 2 - 2 = 0
Formula = MgO
Therefore, the ionic formula exists MgO.
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According to the following reaction, how many grams of
hydrobromic acid are needed to form 24.7 grams of bromine?
hydrobromic acid (aq) —>hydrogen (g) + bromine (1)
…grams hydrobromic acid
Answer:
25.1 g
Explanation:
Step 1: Write the balanced decomposition reaction
2 HBr(aq) ⇒ H₂(g) + Br₂(l)
Step 2: Calculate the moles corresponding to 24.7 g of Br₂
The molar mass of Br₂ is 159.81 g/mol.
24.7 g × 1 mol/159.81 g = 0.155 mol
Step 3: Calculate the moles of HBr needed to produce 0.155 moles of Br₂
The molar ratio of HBr to Br₂ is 2:1. The moles of HBr needed are 2/1 × 0.155 mol = 0.310 mol.
Step 4: Calculate the mass corresponding to 0.310 moles of HBr
The molar mass of HBr is 80.91 g/mol.
0.310 mol × 80.91 g/mol = 25.1 g
Scientist use models of the solar system to
1 avoid the use of incorrect data
2 prevent duplication of their ideals
3 help explain their ideas
4 make theories non-testable
7
State two signification of melting?
Which image represents ether? Check all that apply.
Answer:
A) and D)
Explanation:
I just completed this assignment and these are the correct options!
In the given image, the compounds that represents ether are option 1 and 4, respectively.
Ether is a class of organic compounds that contain an oxygen atom bonded to two alkyl or aryl groups. The general formula for ethers is [tex]\rm R-O-R'[/tex], where R and R' are alkyl or aryl groups.
Compound 1 is 1-methoxypentane is an ether with the molecular formula [tex]\rm C_6H_{14}O[/tex]. It consists of a pentane chain (a straight chain of five carbon atoms) with a methoxy [tex]\rm (-OCH_3)[/tex] group attached to the first carbon atom. Compound 4 is methoxyethane. It is an ether with the chemical formula [tex]\rm C_3H_8O[/tex]. The structure of methoxyethane consists of a ethane chain (a straight chain of two carbon atoms) with a methoxy [tex]\rm (-OCH_3)[/tex] group attached to the first carbon atom.Therefore, compound 1 and compound 4 represents ether. The correct answer is option 1 and 4, respectively.
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match the molecular shapes to the correct Lewis structures
trigonal pyramid
trigonal planar
bent
tetrahedral
linear
Answer:
Match up correct answers:
1) trigonal planar
2) tetrahedral
3) trigonal pyramid
4) linear
Explanation:
(correct answers on portal and edmentum users)
Hope I was helpful, have a great day and good luck :)
AlH₃ - trigonal planar
CH₂F₂ - tetrahedral
PH₃ - trigonal pyramidal
O₃ - bent
What is a Lewis structure?The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms. Electrons are shown as dots or, in the case of a bond, as a line connecting the two atoms.
How do you determine the molecular shape?Depict the Lewis Structure.Determine if the electron groups are in bond pairs or are lone pairs by counting the number of electron groups. Keep in mind that lone pairs and bonds are both included in electron groups!The electron-group geometry is named. (Specify if it is octahedral, tetrahedral, trigonal-bipyramidal, or linear.)The molecular geometry is determined by examining the locations of the surrounding atomic nuclei. (Count the number of lone pairs)Learn more about molecular geometry here:
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what is a major crack in the earth's surface?
Answer:
A crack in earth's crust is called a fault also known as a "fracture"
a transverse wave moves a medium at an abtuse angle to the wave , true or false ?
Answer:
True! A transverse wave does move a medium at an obtuse angle to the wave!!
Answer:
False
Explanation:
what is chemical name of ghee
Answer. Chemical formula of ghee: (C17H33 Coo)3 C3H5 • Chemical Reaction: (C17H31Coo)3 C3H5 + 3H2 (C17H33 Coo)3 C3H5
The total pressure in a tank is filled with a mixture of gases : Oxygen, Helium, and Argon is 15.3 atm. The P(He) = 3.2 atm, P(O) = 7.4 atm, what is the P(Ar) in the tank?
Answer:
4.7 atm
Explanation:
From the question given above, the following data were obtained:
Total pressure (P) = 15.3 atm
Pressure of Helium, P(He) = 3.2 atm
Pressure of Oxygen, P(O) = 7.4 atm
Pressure of Argon, P(Ar) =?
The pressure of Argon, P(Ar) in the tank can be obtained as illustrated below:
P = P(He) + P(O) + P(Ar)
15.3 = 3.2 + 7.4 + P(Ar)
15.3 = 10.6 + P(Ar)
Collect like terms
15.3 – 10.6 = P(Ar)
4.7 = P(Ar)
P(Ar) = 4.7 atm
Therefore, the pressure of Argon, P(Ar) in the tank is 4.7 atm
Calculate the number of molecules in 14.3 mol H2O.
Answer:
I don't get it
Explanation:
please explain more about question
does the moon really change shape? why
1. How many grams of sodium carbonate must be weighed out in order to make 2.5 kg of a 35.0%
(w/w) solution?
Answer:
... x M x V. • Example: Prepare 800 mL of 2 M sodium chloride. ... solutions are indicated by w/v% and are defined as the grams of solute per ...
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Which of the following indicates that a chemical equation is balanced?
a. The numbers of atoms of each element are the same on both sides of the equation.
b. All of the coefficients are the same.
C. The numbers of molecules on each side of the equation are equal.
d. The sums of the coefficients on each side of the equation are equal.
Calculate the value of ΔG° at 25°C for the formation of POCl3 from its constituent elements,
P2 (g) + O2 (g) + 3Cl2 (g) --> 2POCl3 (g)
A. -606.2 kJ/molrxn
B. +1108.7 kJ/molrxn
C. -1108.7 kJ/molrxn
D. +606.2 kJ/molrxn
The correct answer is
C. -1108.7 kJ/mol rxn
From the table values, the standard Gibbs free energy change for the formation of POCl₃ is -1108.7 kJ/mol
What is Gibbs free energy ?We can calculate ΔG° for the reaction using the following formula:
ΔG° = ΣnΔG°f(products) - ΣnΔG°f(reactants)
where ΔG°f is the standard Gibbs free energy of formation for each compound and n is the stoichiometric coefficient of each compound in the balanced chemical equation.
We can look up the values of ΔG°f for each compound in tables of thermodynamic data. At standard conditions (25°C and 1 atm pressure), the values are:
ΔG°f (POCl₃) = -558.9 kJ/mol
ΔG°f (P₂) = 0 kJ/mol
ΔG°f (O₂) = 0 kJ/mol
ΔG°f (Cl₂) = 0 kJ/mol
Plugging these values into the formula, we get:
ΔG° = (2 mol)(-558.9 kJ/mol) - (1 mol)(0 kJ/mol) - (1 mol)(0 kJ/mol) - (3 mol)(0 kJ/mol)
ΔG° = -1117.8 kJ/mol
Therefore, the correct option is C. -1108.7 kJ/molrxn. Note that this answer differs slightly from the calculated value because the given choices are rounded to one decimal place.
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TRUE or FALSE: The only way to see a recessive trait is to inherit 2 recessive
alleles.
Answer:
false it's more than two
In a rush, a student only measured the mass of the empty beaker once before beginning
the experiment and one more time after the entire experiment was finished. The mass of
the empty beaker was found to be 0.123g less at the end of the experiment. What
happened?
Answer:
The student measured the cup and got an incorrect answer
Explanation:
because he was in a rush.
what type of sugar has the largest surface area
a) powered/icing
b) raw
c) cubed
d) granulated
Answer:
d.) granulated
Because the granulated sugar has a greater surface area.