Answer:
Silver
Explanation:
Given parameters:
Mass = 116g
Energy = 511J
Initial temperature = 21.6°C
Final temperature = 40.5°C
Unknown:
Specific heat capacity and the type of metal = ?
Solution:
To solve this problem, we need to find the specific heat capacity of the metal given,
H = m x c x Ф
H is the energy
m is the mass
c is the specific heat capacity
Ф is the change in temperature
511 = 116 x c x (40.5 - 21.6)
511 = 2192.4c
c = 0.233J/g°C
The specific heat capacity of silver is similar to this.
Answer:
READ THE EXPLAINATION
Explanation:
It says show your work.
40.5°C – 21.6°C = 18.9°C
So, the metal was raised 18.9 deg Celsius.
It took 511 J of energy to raise the metal 18.9 deg Celsius.
511/ 18.9 = 27.03
It takes 27.03 J to raise 116 g of the metal 1 degree.
27.03/116 = .233
It takes .233 J to raise 1 gram of the metal 1 degree.
Therefore, the specific heat capacity of the metal is .233 J
According to the Specific heat values table, Silver has a specific heat capacity of .233.
The metal is silver.
Name the type of chemical reaction that occurs when magnesium chloride solution reacts with sodium carbonate solution
Answer:
precipitation reaction
The replacement reaction occurs when magnesium chloride solution reacts with sodium carbonate solution and form [tex]MgCO_{3}[/tex] white precipitate.
What is replacement reaction?The reaction in which cation of one molecule is replace or substitute by cation of another molecule or anion of one molecule is replace or substitute by another molecule.Example : [tex]MgCl + NaCO_{3}[/tex] → [tex]MgCO_{3} + NaCl[/tex]What is precipitate?The insoluble substance accumulate at the bottom of the surface is called precipitate.Example : [tex]MgCl + NaCO_{3}[/tex] → [tex]MgCO_{3} + NaCl[/tex]In the above reaction [tex]MgCO_{3}[/tex] white precipitate.Learn about replacement reaction.
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A gas has a boiling point of 175 celsius. At what kelvin temperature would this gas boil
Answer:
448
Explanation:
K =273+°c
K=273+175
K=448
How many moles are in 4.3 x 10 ^22 molecules of Na3PO4
Answer:
0.071 moles of Na₃PO₄ .
Explanation:
Given data:
Number of molecules of Na₃PO₄ = 4.3× 10²² molecules
Number of moles = ?
Solution:
1 mole contain 6.022 × 10²³ molecules
4.3× 10²² molecules × 1 mol / 6.022 × 10²³ molecules
0.71× 10⁻¹ mol
0.071 mol
The number 6.022 × 10²³ is called Avogadro number.
"It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance"
How many grams of Fe will be produced if 705.0g of H20 are produced?
Fe3O4 + 4H2
-->
3 Fe + 4H2O
2265 g Fe₃O₄
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] Fe₃O₄ + 4H₂ → 3Fe + 4H₂O
[Given] 705.0 g H₂O
Step 2: Identify Conversions
[RxN] 4 mol H₂O → 1 mol Fe₃O₄
Molar Mass of H - 1.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Fe - 55.85 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
Molar Mass of Fe₃O₄ - 3(55.85) + 4(16.00) = 231.55 g/mol
Step 3: Convert
Set up stoich: [tex]\displaystyle 705.0 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})(\frac{1 \ mol \ Fe_3O_4}{4 \ mol \ H_2O})(\frac{231.55 \ g \ Fe_3O_4}{1 \ mol \ Fe_3O_4})[/tex]Multiply/Divide/Cancel units: [tex]\displaystyle 2264.74 \ g \ Fe_3O_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
2264.74 g Fe₃O₄ ≈ 2265 g Fe₃O₄
Which compound has the greatest molecular mass?
CO2
H2O
Pb2
NH4
We can draw three inequivalent Lewis structures for the sulfite ion , SO32- . The concepts of formal charge and electronegativity can help us choose the structure that is the best representation. 1. Assign formal charges to the elements in each of the structures below. Note: Count oxygen atoms starting from the left for each structure. A B C Formal Charge S O1 O2 O3 2. The best Lewis structure for SO32- is
Answer:
1. The Lewis structure for SO32- is structure B.
Note: See attachment for complete question and for formal charges of the atoms in each structure.
Explanation:
The formal charge of an atom in a molecule is the assumed charge the atom would have if the electrons in the bonds were evenly distributed between the atoms.
Formal charge can be calculated as follows:
Formal charge = number of valence electrons - ( number of non-bonding electrons + ½ bonding electrons)
Formal charges are used to determine the best possible Lewis structure of a molecule or ion. The following rules are applied:
1. A structure in which all formal charges are zero is preferable to one in which some formal charges are not zero.
2. If non-zero formal charges must exist in the structure , the arrangement with the smallest non-zero formal charges is most preferred.
3. Lewis structures are preferable when adjacent formal charges are zero or of the opposite sign.
4. The structure with the negative formal charges on the more electronegative atoms is preferred among other structures of the molecule or ion.
From the above rules, structure B has negative charges on the more electronegative oxygen atoms and has more zero formal charges on the atoms. The central atom, sulfur also has a zero formal charge.
Which change of state involves a release of energy?
Answer: CONDENSATION When steam is cooled, it releases thermal energy and turns into its liquid state. This process is called condensation. reversed if the liquid is cooled. The change from the liquid state to the solid state is called freezing
PLZ HELP IT BEING TIMED!!!!!! PLZ ANSWER!!!!!
Answer:
YIKES. a bit late. Answers include 1, 2, 3
Explanation:
What happens to water when it changes to ice
Answer:The atoms cool down and become slower and their bonds become close and they move less.
Explanation:I took science
GIVING 100 PTS EASY SCIENCE PLS HELP
Answer:
Hello there!
I believe the answer you are looking for is A!
Explanation:
It makes sense to me more than the other answer choices.
have a nice day
What type of crust is colliding?
Japan Trench
Eurasian Plate
Pacific Plate
Answer: The Eurasian Plate or both the Eurasian and Pacific Plate.
Explanation:
To convert between units, you need to know the relationship between units. For example, one mile equals 5280 feet. This relationship can now be used as a conversion factor, set up as required by the question. For each conversion, choose the correct arrangement of the conversion factor and complete the calculation 1. Convert 7860 feet to miles 7860 feet x (A)
A: 1 mile
B: 5280 feet 7860 feet miles 2. Co 0.5 miles to feet 0.565 miles x (C) TD
C: Choose...
D: Choose 0.565 miles feet
Answer:
1. 7860 Feet = 1.488 miles
A= 1
B= 5280
2. 0.565 miles = 2983.2 feet
C= 0.565
D= 1
Explanation:
1. Convert 7860 feet to miles
1 miles= 5280 feet
1 Feet= 1/ 5280 miles
7860 Feet= 7860 ( 1/ 5280) miles
7860 Feet = 1.488 miles
A= 1
B= 5280
2. Convert 0.565 miles to feet
1 mile= 5280 feet
0.565 miles = 5280 feet * (0.565/1)
0.565 miles = 2983.2 feet
C= 0.565
D= 1
We see that when we have to convert feet into miles we divide the number by 5280 because feet are smaller than miles. Similarly when we have to convert miles into feet we multiply by the given number because miles are greater than feet.
The above method used is called the unitary method but we should always keep in mind that conversion from smaller to bigger units require divsion and from bigger to smaller units require multiplication.
uses of photosynthesis products
what are the uses for the photosynthesis products
Answer:
uses of photosynthesies:
Explanation:
In photosynthesis ENERGY from light is used to convert CARBONDIOXDE and water into glucose and oxygen for 6 carbon and 6 water molecules, 1 glucosed and 6 oxygen molecules are produced.
What is photosynthesis?
____________________Answer :-The process by which green plants and some other organisms use sunlight to synthesize nutrients for their nourishment is called Photosynthesis.
Some requirements of photosynthesis to take place :-
Presence of carbon dioxide.Presence of water. In plants, in photosynthesis, require a green coloured pigment named 'Chlorophyll'.Presence of Sunlight.A temperature of 25°C to 40°C is needed.Result ( product ) of photosynthesis :-
When the process of photosynthesis is completed, it releases Oxygen as a by-product.
Chemical Equation for Photosynthesis :-
[tex] \sf6CO_2 + 6H_2O \binom{sunlight \: and \: chorophyll}{ \rightarrow} C_6H _ {12} {O _6 + 6O_2} \uparrow[/tex]
____________________Note :-Scroll from right to left to see the whole solution.
Dribbling a basketball harder into the floor makes it bounce higher is an example of what newton's law?
please help me please help me
What is the only way to be certain that a chemical change has occurred
Answer:
New kinds of products forms and the reaction is not easily reversible.
Explanation:
The only way to be certain that a chemical change has occurred is by finding out if new kinds of products have been formed.
A chemical change is a change in which new kinds of matter is formed. It is always accompanied by energy changes.
The process is not easily reversible.
Examples of chemical changes are combustion, rusting of iron, precipitation and souring of milk.
Question 10
What volume is occupied by 1.64 x 1019 atoms of Helium gas at STP?
O 1.22 x 10-6 L He
O 2.21 x 1044 L He
0.000610 L He
O 4.41 x 1041 L He
Answer:0.00061L He
Explanation:Avogadro constant, N = 6.02214076*10^23 per mole
at STP 1 mole = 22.71L
1.64*10^19 He = ( 1.64*10^19/N)*22.71 = 1.64*10^19*[3.77*10^-23] = 6.18*10^-4L
000610 L volume is occupied by 1.64 x 1019 atoms of Helium gas at STP. Therefore, option C is correct.
What do you mean by STP ?The nominal conditions in the atmosphere at sea level are referred to as standard temperature and pressure (STP). These are the conditions: 0 degrees Celsius and 1 atmosphere (atm).
It is written as V = nRT/P. "P" stands for pressure, "V" stands for volume, n stands for the number of moles of a gas, "R" stands for the molar gas constant, and "T" stands for temperature.
The International Union of Pure and Applied Chemistry (IUPAC) utilized to define STP as 0 ᵒC (273.15 K, or 32 ᵒF) and 1 atm (101.325 kPa = 760 Torr) .
Avogadro constant, N = 6.023 × 10^23 per mole
At STP 1 mole = 22.71L
1.64 × 10^19 He = ( 1.64 × 10^19/N) × 22.71
= 1.64 × 10^19 × [3.77 × 10^-23]
= 6.18 × 10^-4L
= 000610 L He
Thus, option C is correct.
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7.
Use the reaction below for the reaction of dicyanoacetylene with
ozone to produce carbon monoxide and nitrogen.
3C4N2(8) + 403(g) → 1200(8) + 3N2(g).
What volume of CO is produced when 1.20 L of C4N2 reacts?
a 0.300 L CO
b 3.60 L CO
C 14.4 L CO
d 4.80 L CO
Answer:
D
Explanation:
The volume of carbon monoxide is produced when 1.20 L of dicyanoacetylene reacts is
What is stoichiometry?Stoichiometry of any reaction tells about rhe relative amount of substance present before and after the completion of any chemical reaction.
Given balanced chemical reaction between dicyanoacetylene and ozone to produce carbon monoxide and nitrogen is:
3C₄N₂ + 4O₃ → 12CO + 3N₂
From the stoichiometry of the reaction it is clear that:
3 liters of C₄N₂ = produces 12 liters of CO
1.20 liters of C₄N₂ = produces 12/3×1.20=4.8 liters of CO
Hence option (d) is correct i.e. 4.8 liters.
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Importance of Science and Technology in Contemporary world
Answer:
Technology, science and knowledge are important in modern contemporary society. The understanding of how social, cultural and material elements influence the production of new practices, new ways of understanding and new institutions is vital in our understanding of contemporary postmodern society.
Explanation:
1. impact of technological development on everyday life, 2. debates about the cultural significance of science and technology
Hope this helped! Brainlist?
Answer:
The importance of Science and Technology is so that if your tryin to prove your point with science you have to be educated on that in order to actually prove it. and for technology if we didn't have that we will not be able to know what is going on in society.
Explanation:
What is the density of motor oil in g/mL if 1.25 quart (qt) weighs 2.25 pounds (lb)?
Answer:
0.86 g/mL
Explanation:
In order to solve the problem, you have to know the formula for "Density." Density refers to "mass per unit volume." It's formula is:
Density (ρ) = [tex]\frac{mass}{Volume}[/tex]Next, we have to convert the units of measurement in accordance to what is being asked in the problem. It is asking for "g/mL," which means we have to convert 1.25 quarts (qt.) to mL and 2.25 pounds (lbs.) to grams.
Let's solve.
1 quart = 946.35 mL1.25 qt. x [tex]\frac{946.35 mL}{1 qt.}[/tex] = 1,182.94 mL
1 pound = 453.592 grams2.25 pounds x [tex]\frac{453.592 grams}{1 pound}[/tex] = 1,020.58 grams
Now that we converted them to their appropriate units of measurement, we can now solve for density.
ρ = [tex]\frac{mass}{Volume}[/tex]ρ = [tex]\frac{1,020.58 grams}{1,182.94 mL}[/tex]ρ = 0.86 g/mLThe density of the motor oil is 0.86 g/mL
How much drug should be used in preparing 50mL of solution such that 5 mL diluted 500mL will yield 1:1000 solution?
Stock solutions contain a standardized concentration of the solute in a solution. To prepare 50 mL of solution with a ratio of 1:1000 solution, 5 gms of the drug will be required.
What is dilution?Dilution is the property of the solution with a less amount of solute concentration than the stock solution. A dilute solution is prepared by the addition of more solvent.
The addition of the solvent in a solution decreases the molar concentration which leads to dilution.
The ratio of 1:1000 means that 1 gm of the drug is present in 1000 mL (1L) of solution.
1000 mL = 1 gm × 500 mL × X gm
Here, the X represents the 0.5 gm of drug dissolved in 500 mL.
The amount of drug used is calculated as,
5 mL ÷ 50 ml = 0.5 g ÷ X g
X = 0.5 × 50 ÷ 5
= 5 gm
Therefore, 5 gm of the drug is required to prepare 50 mL of solution.
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Why do different places on Earth have different climates?
Answer:
cause of the sun rotation
Explanation:
Answer:
The world is tilting on an edge that creates seasons.
Explanation:
And that's why different parts of the have different climates.
which of the following is NOT a function of the skeletal system?
A. supports the body
B. gives shape to the body
C. enables the body to move
D. yransports nlood throughout the body
Answer:
A yan hehehehe
salamat puso ma ah
What is the coefficient, subscript for V, and subscript for O in V2O5
Answer: Coefficient 0
subscript for V 2
subscript for O 5
Explanation: yes
There is no coefficient in V₂O₅ and the subscript of vanadium V is 2 and the subscript of oxygen is 5.
What is vanadium pentoxide ?Vanadium pentoxide is an ionic compound formed by donating electrons from the vanadium metal to oxygen. The chemical formula of vanadium pentoxide is V₂O₅.
The chemical formula of a compound is written in terms of the chemical symbol of each constituent elements and the number of their atoms. The number of atoms is written as subscript for the chemical symbols.
In V₂O₅, there are are 2 vanadium atoms and 5 oxygen atoms. Coefficients are numbers prior to the formula in reaction. Here there is no coefficient and the subscript for V is 2 and that of O is 5.
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What is the SI unit for force?
Answer: The SI unit of force is the newton, symbol N.
Explanation:
Answer:
the SI unit of force is newton
What is CaF2(aq) + Rb
Answer:
RbF2 + Ca
Explanation:
Since Rb is located in IIA as well as Ca, Rb has ion form Rb2+
Hence CaF2 + Rb → RbF2 +Ca
Please be reminded, this answer may not be 100% correct
According to Image 2, which tectonic plate is composed of the largest percentage of oceanic lithosphere?
A. African Plate
B. Eurasian Plate
C. Indian Plate
D. Nazca Plate
Answer:
I think the answer is A the Afracan plate
Explanation:
hope this helps:)
HELP!!! The chemical formula is different from the empirical formula in
A) H2O2
B) CO2
C) CO.
OD) H20.
Answer:
the Ans is H2O2
Explanation:
THANKS.............
how an object accelerates when it changes direction?
Answer:
An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate - the direction of the velocity changes.
Explanation:
Answer:
An object which experiences either a change in the magnitude.
Explanation:
the direction of the velocity changes.
Hope that helps :)
Have a good day
The density of molasses is 2.28g/mL. What volume of molasses would have a mass of 392.8g?
Answer:
V = 172.28 mL
Explanation:
density is mass divided by volume
p = density
m = mass
V = volume
p = m/v
V = m/p
V = 392.8/2.28
V = 172.28 mL