Answer:
1192.54 J
Explanation:
Applying,
Q = cm(t₂-t₁)................ Equation 1
Where Q = Amount of heat lost, c = specific heat capacity of the iron, m = mass of the iron, t₁ = initial temperature, t₂ = final temperature.
From the question,
Given: m = 83 g = 0.083 kg, t₁ = 297 K, t₂ = 329 K
Constant: c = 449 J/kg.K
Substitute these values into equation 1
Q = 449(0.083)(329-297)
Q = 449(0.083)(32)
Q = 1192.54 J
What mass of methanol (CH3OH) is produced when 140.1 g of carbon
monoxide reacts with 12.12 g of hydrogen?
CO(g) + 2H2(g) → CH2OH()
A. 160.2g
B. 96.12 g
C. 6.06 g
D. 192.2g
Answer:
B. 96.12 g
Explanation:
To solve this question we must convert each reactant to moles. Using the balanced equation we can find limiting reactant. With moles of limiting reactant we can find the moles of methanol and its mass:
Moles CO -Molar mass: 28.01g/mol-
140.1g CO * (1mol / 28.01g) = 5.0 moles CO
Moles H2 -Molar mass: 2.01g/mol-
12.12g * (1mol / 2.01g) = 6.03 moles H2
For a complete reaction of 5.0 moles of CO are required:
5.0moles CO * (2mol H2 / 1mol CO) = 10.0 moles of H2 are required
As there are just 6.03 moles, H2 is limiting reactant.
The moles of methanol produced are:
6.03 moles H2 * (1mol CH3OH / 2mol H2) = 3.015 moles CH2OH
Mass CH3OH -Molar mass32.04g/mol-:
3.015 moles CH2OH * (32.04g/mol) =
96.6g CH3OH ≈ B. 96.12 g
A car reaches 80 km/hr, then suddenly crashed into a concrete wall. Without a seat
belt, the crash test dummy slams into the car's dashboard because
A the crash test dummy's kinetic energy drops to zero
B the dashboard is pushed backwards into the crash test dummy
C the crash test dummy continues its motion until acted upon by an unbalanced
force
D Gravity is pulling the crash test dummy in the direction the car is moving
Answer:
C
Explanation:
inertia
inertia is the reluctance of an object at rest or moving to change its state of rest or motion
because the car was moving, the dummy moves with the speed of the car..so when the crash happened the dummy continued to move..it was feeling reluctant to come to rest so was moving
What is the total number of atoms in the formula
Ca(ClO3)2?
Answer:
9 atoms
Explanation:
Ca=1
Cl=2
O=6
add them all
answer
cl atom is 2
ca atom is 1
o atom is 6
Which of the following is a redox reaction? (HELP ASAAAP)
A)
MgCO3 → MgO + CO2
B)
Mg(OH)2 + 2HCl → MgCl2 + H2O
C)
CuO + H2SO4 → CuSO4 + H2O
D)
3MnO2 + 4Al → 3Mn + 2Al2O3
Answer:
D
Explanation:
Al is a reducing agent because it removes Oxygen from another compound
Mno2 is an oxidizing agent
what is the first 30 elements in chemistry
Answer:
Hydrogen (H)
Helium (He)
Lithium (Li)
Beryllium (Be)
Boron (B)
Carbon (C)
Nitrogen (N)
Oxygen (O)
Explanation:
that's the main ones I know
Answer:
H,He,Li,Be,B,C,N,O,F,Ne,Na,Mg,Al,Si,P,S,Cl,Ar,K,Ca,Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn...
Explanation:
H stands for hydrogen
He stands for helium
Li stands for lithium
Be stands for beryllium
B stands for boron
C stands for carbon
N stands for nitrogen
O stands for oxygen
F stands for fluorine
Ne stands for neon
Na stands for sodium
Mg stands for magnesium
Al stands for aluminum
Si stands for silicon
P stands for phosphorus
S stands for sulfur
Cl stands for chlorine
Ar stands for argon
K stands for potassium
Ca stands for calcium
Sc stands for scandium
Ti stands for titanium
V stands for vanadium
Cr stands for chromium
Mn stands for manganese
Fe stands for iron
Co stands for cobalt
Ni stands for nickel
Cu stands for copper &
Zn stands for zinc
HOPE THIS ANSWER WILL HELP YOU!!!
If 4.03 x 102 mL of water vapor is at STP, then determine the mass, in grams, of the water vapor. Round your
answer to three significant figures.
Answer:
you me me
Explanation:
got me me
Can anyone please suggest me a good and easy project topic for physics and chemistry. For class nine or ten students.Please please please help me.
Are bonds ever truly 100 % ionic or 100 % covalent and why?
Vincent dissolves 6.5 g of bromic acid, HBrO3, to prepare 600.0 mL of solution. Calculate the concentration of the acid Vincent produced.
Answer: The concentration of the acid Vincent produced is 0.083 M.
Explanation:
Given: Mass = 6.5 g
Volume = 600.0 mL (1 mL = 0.001 L) = 0.6 L
Moles is the mass of substance divided by its molar mass. So, moles of bromic acid (molar mass = 128.91 g/mol) are calculated as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{6.5 g}{128.91 g/mol}\\= 0.05 mol[/tex]
Molarity is the number of moles of a substance present in liter of a solution.
Therefore, molarity (concentration) of the given solution is calculated as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.05 mol}{0.6 L}\\= 0.083 M[/tex]
Thus, we can conclude that the concentration of the acid Vincent produced is 0.083 M.
what is the total number of protons in carbonate, CO2/3- please help
Answer:
30 positive charged protons
What is the molar mass caci2
Answer:
Since the molar mass of Calcium is 40.08 g and the molar mass of Chlorine is 35.45, it would be 40.08g+35.45g+35.45g (with 2 Chlorines according to the subscript.) That leaves you with 110.98 g.
Explanation:
Hope it helps you
How much heat is absorbed if 75.4 g of CO2 reacts?
Answer:
6x
Explanation:
Answer:
Δ
H
=
−
389 kJ
The temperature of a 95.4 g piece of copper decreases from 48°C to 25°C when the copper releases - 849 J of heat. What is the specific heat of copper?
Which are characteristics of electromagnetic waves? Check all that apply.
Answer:
Electromagnetic waves are typically described by any of the following three physical properties: frequency (f), wavelength (λ), or intensity (I). Light quanta are typically described by frequency (f), wavelength (λ), or photon energy (E). The spectrum can be ordered according to frequency or wavelength.
Para el elemento de Z-56 b, que formula minima tiene el compuesto que forma con 17-cl¿ c, que tipo de union hay en dicho compuesto¿ d, cual es la estructura de lewis del compuesto formado¿
Answer:
ver explicacion
Explanation:
El elemento que tiene el número atómico 56 en la tabla periódica del bario. El bario es un elemento del grupo dos.
Se combina con el cloro para formar cloruro de bario. que tiene la fórmula BaCl2 de acuerdo con la valencia de ambos elementos.
El cloruro de bario es un compuesto iónico.
What is a conjugate acid-base pair?
Answer:
A
Explanation:
In the Brønsted-Lowry definition of acids and bases, a conjugate acid-base pair consists of two substances that differ only by the presence of a proton (H⁺).
Match each element or compound with the appropriate symbol or molecular formula. Carbon dioxide CO2 carbon o oxygen Н H water с hydrogen H2O
Answer:
Carbon dioxide ---> CO₂
Water ----> H₂O
Carbon ---> C
Oxygen ----> O₂
Hydrogen ----> H₂
Explanation:
The molecular formula of an element or compound is a formula which represents the composition of a molecule of that element or compound. It consists of the formula representing the atoms present as well as the number of atoms of each element innthe compound written as subscript innthe formula of the element or compound.
The molecular formula of the given elements and compounds are given below:
Carbon dioxide ---> CO₂
Water ----> H₂O
Carbon ---> C
Oxygen ----> O₂
Hydrogen ----> H₂
The molecular formula of carbon dioxide shows that in a molecule of carbon dioxide, there are two atoms of oxygen and one atom of carbon present in a molecule of carbon dioxide.
The molecular formula of water shows that are two atoms of hydrogen and one atom of oxygen present in a molecule of water.
The molecular formula of carbon shows that there are one carbon atoms in a molecule of carbon.
The molecular formula of oxygen shows that there are two oxygen atoms in a molecule of oxygen gas.
The molecular formula of hydrogen shows that there are two molecules of hydrogen in a molecule of hydrogen gas.
What is the net ionic equation for the following reactant?
Al (s) + HCl (aq) -->
Explanation:
hope the picture above helps u to understand:)
List some of the effects of the increased production of
greenhouse gases on the Earth
Answer:
See Explanation
Explanation:
Green house gases are those gases believed to be responsible for the trapping of infrared ray close to the surface of the earth. The effect of the buildup of such gases include;
1) Rise in global temperature; Greenhouse gases trap infrared rays close to the surface of the earth there by leading to a continuous rise in the temperature of the earth. This is known as global warming.
2)Climate Change; Increase in the concentration of greenhouse gases in the atmosphere leads to different patterns of climatic events. This gradual change in the pattern of climatic events is called climate change.
3)Melting of polar ice caps and flooding; Increase in the concentration of greenhouse gases and consequent increase in the earth's temperature leads to the melting of polar ice caps and subsequently flooding in various parts of the world.
Which represents the correst equilibrium constant expression for Cu(s) +2Ag<------> Cu^2 (aq) +2Ag(s)
Answer:
[tex]Kc=\frac{(Cu2)(Ag)^2}{(cu)(Ag)^2}[/tex]
Explanation:
because it is products / reactants
Hope this helps:)
Water is said to be a good solvent for polar solutes because it has a negative end and a positive end. This explains why (IONIC/COVALENT) compounds dissolve easily in water. Highlight one
Pollution is any waste product that damages an ecosystem
True or false?
Answer:
True!
Explanation:
Not only products cause pollution, but the smoke from factories, the gas from our cars. Hope this is helpful! ^^
A seais usually defined as A.A body of freshwater that is not connected to the ocean B. A body of freshwater that is connected to the ocean C. A body of salt water that is not connected to the ocean D. Body of salt water that is connected to the ocean
Answer:
D. Body of salt water that is connected to the ocean
Explanation:
An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;
1. The Pacific ocean.
2. The Artic ocean.
3. The Atlantic ocean.
4. The Indian ocean.
A sea is usually defined as a body of salt water that is connected to the ocean and are surrounded (enclosed) by land partially.
Basically, a sea is formed where a land and an ocean meet and as a result, an ocean is usually bigger than a sea.
Some examples of seas around the world are Red sea, Mediterranean sea, Sargasso sea, Caribbean sea, Baltic sea, Caspian sea, Chuckchi sea, etc.
Answer:
Yes The Anwer is D Hope This Help:)
3x +14y=5xy
21y - x =2xy
Answer:
456789
Explanation:
For each of the following sets of elements, state whether all of the elements are in the same group, the same period, or neither the same group or the same period.
a. Fe, Ru, Os
b. Rh, Pd, Ag
c. Sn, As, S
d. Se, Te, Po
Answer:
a. Same group, different period
b. Different group, same period
c. Different group, different period
d. Same group, different period
what is difference between pipette and flask
Answer:
Erlenmeyer flasks have a narrow neck over a conical base, while beakers are basically large open-mouthed glass jars with a lip and spout for pouring. Graduated cylinders are tall cylinders with a spout to pour liquids; they have hash marks on the side to measure the volume of their contents.
Explanation:
hope it helps you alot
2.00 liters of gas at 1.00 atm and conpresssed it to a pressure of 6.00 atm, what would the volume of the gas be
Answer:
[tex]V_2=0.5L[/tex]
Explanation:
From the question we are told that:
initial Volume [tex]V_1=2.00L[/tex]
initial Pressure [tex]P_1=1 atm[/tex]
Final Pressure [tex]P_2=6atm[/tex]
Generally the equation for Final Volume V_2 is mathematically given by
Since Boyle's law states
[tex]P_1V_1=P_2V_2[/tex]
[tex]V_2=\frac{P_1V_1}{P_2}[/tex]
[tex]V_2=\frac{2*1}{6}[/tex]
[tex]V_2=0.5L[/tex]
226 • Ra 4/2 He + 88 = ?
Answer: the answer for this question is in the pic
Explanation:
Where to connect the lines? Pls answer
Answer: The given factors are matched to the effect it would have on the reaction rate are as follows.
Increase reaction rate- Crushing the antacid tablet
- Using many antacid tables
- Adding a catalyst to the water
Decrease reaction rate- Cooling the water during the reaction
No effect on reaction rate- Adding food coloring to the water
Explanation:
When antacid tablet is crushed then there will be more number of particles available for reaction. Hence, more number of collisions will take place due to which rate of reaction increases.
Using many antacid tables will also increase the number of molecules due to which there will be more collisions. Hence, more will be it's rate of reaction.
A catalyst is defined as a substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
Therefore, adding catalyst to the water will also increase the rate of reaction.
When water is cooled during the reaction then kinetic energy between molecules decreases due to which there will be less number of collisions. Hence, rate of reaction will decrease.
Adding food coloring will have no effect on the rate of reaction as it is only changing the color of solution and does not participate in the chemical reaction.
Thus, we can conclude that given factors are matched to the effect it would have on the reaction rate are as follows.
Increase reaction rate- Crushing the antacid tablet
- Using many antacid tables
- Adding a catalyst to the water
Decrease reaction rate- Cooling the water during the reaction
No effect on reaction rate- Adding food coloring to the water
Solve the given problems showing all work for each. 1. Calculate the molar mass/formula mass of ammonium sulfate -- (NH4)2SO4 , The atomic mass of Nitrogen (N) = 14.0, Sulfur (S) = 32.1, Hydrogen (H) = 1.0, & Oxygen (O) = 16.0 *
Answer:
The molar mass of ammonium sulfate, (NH₄)₂SO₄ = 132.1 g
Explanation:
The molar mass of a compound is the mass of 1 mole of the given substance.
For a compound the molar mass of the compound is obtained by summing the product of the number of atoms and the atomic masses of the atoms present in the compound.
To calculate the molar mass of ammonium sulfate, (NH₄)₂SO₄:
Atomic masses of the elements are as follows; Nitrogen (N) = 14.0, Sulfur (S) = 32.1, Hydrogen (H) = 1.0, & Oxygen (O) = 16.0
Mass of Nitrogen present = 14.0 × 2 = 28.0 g
Mass of hydrogen present = 1.0 × 4 × 2 = 8.0 g
Mass of sulfur present = 32.1 × 1 = 32.1 g
Mass of oxygen present = 16.0 × 4 = 64.0 g
Molar mass of ammonium sulfate, (NH₄)₂SO₄ = (28.0 + 8.0 + 32.1 + 64.0) g = 132.1 g
Therefore, the molar mass of ammonium sulfate, (NH₄)₂SO₄ = 132.1 g