The atomic mass of the metal.(M) = 51 g/mol
Further explanationGiven
32% of oxygen
Required
the atomic mass of the metal.
Solution
An oxide of trivalent metal : M₂O₃(Ar O = 16 g/mol)
The molar mass of metal oxide = 2M+16.3=2M+48
32% of oxygen, then :
32% x 2M+48 = 48
0.32(2M+48)=48
0.64M+15.36=48
0.64M=32.64
M=51
How much heat is required to melt 20 g of gold at 1064.18 °C with a heat of fusion of 64 J/g *
Answer:
1280J are required.
Explanation:
Heat of fusion is defined as the amount of heat required to change its state from liquid to solid at its melting point at constant pressure.
As heat of fusion of gold is 64J/g, there are required 64J to melt 1g of gold at its melting point. The energy required to melt 20g is:
20g * (64J/g) =
1280J are required
What is the definition chemical property of matter?
Answer:
Describes its potential to undergo some chemical change or reaction by virtue of its composition
PLEASE HELP ME WILL DO ANYTHING ‼️‼️
A fluorine atom has 9 electrons. Draw the Bohr model for fluorine using the pattern you observe for the Bohr models for hydrogen helium, oxygen and neon
Answer:
In first shell 2 electrons are present and 7 electrons are present in last shell
Explanation:
Which best describes a semiconductor?
a.)Semiconductors are more conductive than a nonmetal and less conductive than a metal.
b.)Semiconductors are more conductive than a nonmetal and less conductive than a metalloid.
c.)Semiconductors have a high electrical conductivity.
d.)Semiconductors have a no electrical conductivity.
Answer:
a.)Semiconductors are more conductive than a nonmetal and less conductive than a metal.
Explanation:
Answer: A is your answer
Explanation: yor welcome =]=]=]=]
1 Na2CO3(aq) + 1 CaCl2(aq) → 1 CaCO3(s) + 2 NaCl(aq) 4. Use the balanced chemical equation from the last question to solve this situation: You combine 0.5 grams of Na2CO3 with excess CaCl2. How many grams of NaCl would you expect this reaction to produce? Show all work below.
0.6 g NaCl
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] Na₂CO₃ (aq) + CaCl₂ (aq) → CaCO₃ (s) + 2NaCl (aq)
[Given] 0.5 g Na₂CO₃ reacted with excess CaCl₂
Step 2: Identify Conversions
[RxN] Na₂CO₃ → 2NaCl
Molar Mass of Na - 22.99 g/mol
Molar Mass of C - 12.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of Na₂CO₃ - 2(22.99) + 12.01 + 3(16.00) = 105.99 g/mol
Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 0.5 \ g \ Na_2CO_3(\frac{1 \ mol \ Na_2CO_3}{105.99 \ g \ Na_2CO_3})(\frac{2 \ mol \ NaCl}{1 \ mol \ Na_2CO_3})(\frac{58.44 \ g \ NaCl}{1 \ mol \ NaCl})[/tex]Multiply/Divide: [tex]\displaystyle 0.551373 \ g \ NaCl[/tex]Step 4: Check
Follow sig fig rules and round. We are given 1 sig fig.
0.551373 g NaCl ≈ 0.6 g NaCl
Need Help On this one two anybody !! pls
Answer:
26. Single Displacement
27. Synthesis
28. Decomposition
29. Combustion
30. Double Displacement
31. Combustion
32. Double Displacement
33. Decomposition
Explanation:
Hope it helped!
Magnetism is always present when electric charges ___________.
Answer:
begin to move
Explanation:
When electric charges begin to move, this is when magnetism takes place.
Hope this helped!
The comparison of distance and time can be defined as
Answer:
velocity
Explanation:
"Speed is a measure of the distance an object travels per unit of time."
*The diagram has to do with the question*
Pls help
The staff members working in Radiology department in hospitals, wear shoes with special soles. Justify
Answer:
Radiology departments in hospitals use x-rays, MRIs, CT scans, etc. on a daily basis, meaning they are heavily exposed to radiation without protective equipment, and said exposure can cause cancer down the line and shorten their life significantly. To prevent this from happening, they give the radiologist (and the patient) with equipment with lead (and other materials) which reflects or absorbs the radiation from these scans, including shoes with special soles. These shoes are most likely worn due to the radiation left in the scanning room floors after scans. Radiologists also go to a special room with heavy radiation protection where they can activate and monitor the scan.
Which feature forms as a result of conduction between magma and water?
Answer:
h
Explanation:
get into
Please help!! I'll mark brainliest! (see the picture below)
Explanation:
Why brunojg driftwood makes colored fire... Burning driftwood, especially from the ocean gets a fire with blue and lavender flames. The colored fire comes from excitation of the metal salts that have soaked I to the wood. While the flames arepretty, the smoke give off of the fire is toxic
state the difference between isotopes and isobars
Answer:
Isotopes:- these are those elements in which atoms are same but mass number is different. for eg:- 12^C 6.____________________________________________________________________________
Isobars:- these are those elements in which mass number is same but atoms are different. for example:- 2^Ca 18.Are all cells the same? Give examples
Answer:
nooo all cells are not same
Explanation:
like heart cell, muscles cell
100% no.
Blood cells and white cells, for example, have different colors.
White cells are larger with not much of them while blood cells are opposite.
They are in our body
QUICKKKK How much of the protein consumed by humans around the world is fish? 5 percent 20 percent 40 percent 50 percent
Answer:
20%
Explanation:
I HOPE THIS HELPS YOUUUU
Answer:
20%
Explanation:
Water flowed out of a tank at a steady rate. A total of 18 and one-half gallons flowed out of the tank in 4 and one-fourth hours. Which expression determines the quantity of water leaving the tank per hour?
StartFraction 17 over 4 EndFraction divided by StartFraction 36 over 2 EndFraction
StartFraction 36 over 2 EndFraction divided by StartFraction 17 over 4 EndFraction
StartFraction 17 over 4 EndFraction divided by StartFraction 37 over 2 EndFraction
StartFraction 37 over 2 EndFraction divided by StartFraction 17 over 4 EndFraction
Answer:
StartFraction 37 over 2 EndFraction divided by StartFraction 17 over 4 EndFraction
Explanation:
This problem deals with solving and find the rate at which water flowed out of the tank.
Quantity of water that flowed out of the tank = 18[tex]\frac{1}{2}[/tex] gallons = [tex]\frac{37}{2}[/tex]gallons
Time taken = 4[tex]\frac{1}{4}[/tex]hr = [tex]\frac{17}{4}[/tex]hr
Now to find the rate;
Rate of water flow = [tex]\frac{Quantity of water }{Time taken}[/tex]
Rate of water flow = [tex]\frac{37}{2}[/tex] / [tex]\frac{17}{4}[/tex]
= [tex]\frac{37}{2}[/tex] x [tex]\frac{4}{17}[/tex]
= [tex]\frac{74}{17}[/tex]gallons/hr
Answer:
D
37/2 divided by 17/4
Explanation:
edge 2020
Who is the father of Modern Periodic Table of Elements?
A. Lavoisier
B.Mendeleev
C.Priestly
D.Roentgen
Answer:
B.Mendeleev
Explanation:
I think this is right
The balanced equation for the combustion of ethanol (ethyl alcohol) is: C2H5OH(l) + 3O2(g) ---> 2CO2(g) + 3H2O(g) How many mol of O2 will react with 7 mol of ethanol?
Answer:
21 mol of O₂ will react
Explanation:
Based on the combustion of ethanol:
C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(g)
1 mole of ethanol, C₂H₅OH reacts with 3 moles of O₂
With this ratio of 1 mol C₂H₅OH / 3 moles O₂ we can solve the moles of O₂ that react with 7mol of ethanol:
7 mol C₂H₅OH * (3mol O₂ / 1 mol C₂H₅OH) =
21 mol of O₂ will reactMagnesium metal reacts with a solution of silver nitrate in a single-replacement reaction, producing aqueous magnesium nitrate and silver metal. Write the balanced equation for the reaction. If a reaction starts with 0.480 mol Mg, how many moles of silver are produced?
Answer:
0.96 mol AG
Explanation:
To see the number of atoms of an element, we need to multiply stoichiometry of that molecule to the number that is written on the foot of element. Thus the balanced reaction is
[tex]\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+2Ag[/tex]
And the mole of silver produced from 0.480 mol is 0.96 mol
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side.
The unbalanced equation is
[tex]\rm Mg+AgNO_{3}\rightarrow Mg(NO_{3})_{2}+Ag[/tex]
Magnesium atoms on reactant and product side is 1.
Nitrogen atoms on reactant side is 1 and on product side it is 2 so, multiply [tex]AgNO_{3}[/tex] by 2, now the reaction becomes
[tex]\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+Ag[/tex]
Silver atom on reactant side is 2 while on product side it is 1 so, multiply Ag by 2, now the balanced equation is
[tex]\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+2Ag[/tex]
The mole ratio of Mg to silver is 1:2
1mole of Mg produce=2 mole of Silver
0.480 mol of magnesium produce= 2×0.480=0.96 mol fo silver
Thus the balanced reaction is
[tex]\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+2Ag[/tex]
And the mole of silver produced from 0.480 mol is 0.96 mol
Learn more about the balanced equation, here:
https://brainly.com/question/7181548
#SPJ6
The amount of kinetic energy something has depends on its...
A) mass and speed
B) mass and height
C) mass and weight
Answer:
it depends on mass and speed
A team of geologists is surveying on a mountain. They come across a newly formed stream. The stream is flowing at an average rate of 420 cubic meters per minute. At the average rate of flow the stream will produce 14,700cubic meters of water in
Answer:
35 minutes
Explanation:
The flow rate of the stream is the rate of volume of water with respect to time. It expresses the volume of water flowing per unit time.
Flow rate = [tex]\frac{volume}{time}[/tex]
From the given question,
average flow rate of the stream = 420 cubic meters per minute, and the required volume = 14700 cubic meters.
So that;
time = [tex]\frac{volume}{flow rate}[/tex]
= [tex]\frac{14700}{420}[/tex]
= 35
time = 35 minutes
Therefore, with the given average flow rate, the steam will produce 14,700 cubic meters of water in 35 minutes.
How do you separate a mixture of sodium chloride and potassium trioxonitrateV
Answer:
See explanation
Explanation:
We separate substances based on their important properties such as reaction to heat, solubility in water, magnetic properties, etc.
To separate sodium chloride and potassium trioxonitrateV, we need to heat the solution. KNO3 dissolves at a high temperature and crystallizes out as the solution is cooled.
Hence when we heat the solution, KNO3 dissolves, as we cool the solution, solid KNO3 crystals are obtained while NaCl remains in solution. We have now separated the two salts in the solution.
Note that the solubility of NaCl is almost independent of temperature.
What is the molarity of a 800. mL solution of magnesium bromide if 57.42 g of MgBr2 is dissolved in water?
If F1 = 500 N, what does F equal? PLEASE HELP
Which reagent is the limiting reagent in a reaction?
A. The one with the largest molar mass
B. The one with the largest coefficient
C. The one with the smallest coefficient D. The one that runs out first in the reaction
Answer:
D. The one that runs out first in the reaction
Explanation:
Limiting reagent is the one that limit the yield of product because of its lower amount and run out first. Lets take an example,
Mass of calcium carbonate = 25 g
Mass of hydrochloric acid = 13.0 g
Mass of calcium chloride produced = ?
Chemical equation:
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
Number of moles of CaCO₃:
Number of moles of CaCO₃ = Mass /molar mass
Number of moles of CaCO₃= 25.0 g / 100.1 g/mol
Number of moles of CaCO₃ = 0.25 mol
Number of moles of HCl:
Number of moles of HCl = Mass /molar mass
Number of moles of HCl = 13.0 g / 36.5 g/mol
Number of moles of HCl = 0.36 mol
Now we will compare the moles of CaCl₂ with HCl and CaCO₃ .
CaCO₃ : CaCl₂
1 : 1
0.25 : 0.25
HCl : CaCl₂
2 : 1
0.36 : 1/2 × 0.36 = 0.18 mol
The number of moles of CaCl₂ produced by HCl are less it will be limiting reactant.
Answer:
D. The one that runs out first in the reaction
Explanation:
it was right
Calculate the mass in grams of 9.06 times 10^24 of nickel || phosphate
The mass of Nickel(II) phosphate = 5508.646 g
Further explanationGiven
9.06 x 10²⁴ of Nickel(II) phosphate
Required
The mass
Solution
1 mol = 6.02 x 10²³ particles(molecules,ions, atoms)⇒Avogadro's number
So mol Nickel(II) phosphate :
n = N : No
n = 9.06 x 10²⁴ : 6.02 x 10²³
n = 15.05
mass of Nickel(II) phosphate(Ni₃(PO₄)₂ , MW=366.023 g/mol) :
mass = mol x MW
mass = 15.05 x 366.023
mass = 5508.646 g
1- The element sodium has an atomic number of 11 and a
mass number of 12.
How many protons does sodium have?
Answer and Explanation:
Sodium has 11 protons.
To know how many protons are in an element on the periodic table, all you have to do is look at the atomic number. The atomic number is the same as the amount of protons.
The amount of protons defines the element, which is why it appears on the element description as the atomic number.
Hope this helps!
#teamtrees #WAP (Water And Plant)
1. When a liquid becomes vapor, its gas particles begin to exert...
a. air pressure.
c. vapor pressure.
b. equilibrium pressure.
d. no pressure
Answer:
vapor pressure.
Explanation:
Answer:
I think it is vapor pressure or air pressure
Which statement about London dispersion forces is TRUE?
а
London dispersion forces are the primary force
holding water molecules together.
b London dispersion forces are the strongest
intermolecular forces.
C London Dispersion forces are temporary in nature.
d London dispersion forces are permanent dipoles
between polar molecules.
Answer: Option (C) is the correct answer.
Explanation:
When electrons between two combining adjacent atoms attain positions which leads to the formation of temporary charges over the atoms then there exists a temporary adjacent force called London dispersion force.
This force is also known as induced dipole-induced dipole attraction.
When the temperature is lowered to a certain point then London forces causes the non-polar substances to condense to liquid and then they freeze into solids.
A coiled spring with coils that are closely spaced then widely then closely then widely then closely, ending with a yellow line labeled 1 second. What is the frequency of this wave?
Answer:
The frequency of the wave is 2Hz.
Explanation:
The frequency of a wave is the number of waves that pass a fixed point in a given amount of time. It can be measured by counting the number of crests that pass the point in a given time period. The higher the number is, the greater is the frequency of the wave.
So, by counting the number of times the coils in the spring are widely spaced, which is 2 times in 1 second, we get the frequency of the wave.
Answer:
The answer is 2.
Explanation:
Hope this helps ;)