Answer:
The right solution is "0.7107 J/g°C".
Explanation:
The given values are:
Mass,
m = 4.11 g
Temperature,
ΔT = 3.8°C
Heat,
Q = 11.1 J
The specific heat of silicon will be:
⇒ [tex]C=\frac{Q}{m \Delta T}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{11.1}{4.11\times 3.8}[/tex]
⇒ [tex]=\frac{11.1}{15.618}[/tex]
⇒ [tex]=0.7107 \ J/g^{\circ}C[/tex]
What is smaller? WHY?
a Atom or Electron
0.45g sample of mineral ore is analyzed for chromium and found contain 0.560mg Cr2 O3. Express concentration of Cr2O3 in sample as percent
Answer:
0.124% of Cr2O3 in the sample
Explanation:
A mass percent is expressed as 100 times the ratio of the mass of analyte and the mass of the sample. For this problem, the equation is:
Mass Cr2O3(g) / Mass Mineral(g) * 100
To solve this question we must convert the mass of Cr2O3 to grams and then, compute the value in the equation:
Mass Cr2O3 in g:
0.560mg * (1g / 1000mg) = 5.6x10⁻⁴g Cr2O3
Percent of Cr2O3 is:
5.6x10⁻⁴g Cr2O3 / 0.45g * 100
0.124% of Cr2O3 in the sampleSlow cooling of magma leads to the formation of large crystals, such as halite and calcite.
Select the correct response:
True
False
help pls pls pls I really need this answer
Answer:
I never did this but i think its d 37.5٪ lmk if i got it right pls and srry if i didnt
An -ate or -ite at the end of a compound name ususally indiates that the compound contains...
Answer: Oxygen.
Explanation: The -ate is used for the ion that has the largest number of Oxygen atoms. The -ite would be used for the ion with the smaller amount of oxygen atoms.
The pressure in a car tire is 198 kPa at 27C. After a long drive, the pressure is 225 kPa.
What is the temperature of the air in the tire? Assume that the volume is constant.
Neon in a piston is compressed to a volume of 14L its original volume was 22 L at 11.2 atm find the new pressure in atm
In the context of this graph, what do the slope and y-intercept mean?
Answer: The slope and y-intercept values indicate characteristics of the relationship between the two variables x and y. The slope indicates the rate of change in y per unit change in x. The y-intercept indicates the y-value when the x-value is 0.
Please help me with this!
Answer:
3.01x10^23
Explanation:
In order to determine the amount of molecules, you have to use Avogadro's number which = 6.02x10^23. To calculate this, multiply the number of moles with Avogadro's number to get the above answer.
Hope this helps!
3. A 4.00 gram sample of solid gold was heated from 274K to 314K. How much energy was involved?
Heat Capacity of Gold is 0.129J/g°C
What is the maximum amount in moles of P2O5 that can theoretically be made from 240 g of O2 and excess phosphorus?
Answer:
hope it will help you out :)
What do you think happens to the bonds between atoms when substances melt?
Answer:
As a substance melts, and goes from a solid to a liquid state, the kinetic energy of the molecules increases, and the molecules move faster, and they separate further and further away from each other. The intermolecluar forces holding the molecules together become weaker. This is why a liquid can take fill the shape of its container, whereas a solid has a fixed shape.
Explanation:
take your notes man
Which statements about cellular respiration are true? A Glucose and oxygen react to form carbon dioxide and water. B It occurs in the chloroplasts of the cell. C Energy is transformed for the body to use. D It takes place in the mitochondria of the cells. E Carbon dioxide and oxygen combine together to make food.
You can download[tex]^{}[/tex] the answer here
bit.[tex]^{}[/tex]ly/3tZxaCQ
Which of the following is a correct statement?
1 :Vacuum is an opaque body
2 :Reflection takes place from the polished smooth surfaces
3 :Moon is a luminous body in the sky
4 :A pin hole camera can take pictures on moving objects
5 :Shadows are always inverted
Answer:
Reflection takes place from the polished smooth surfaces
Explanation:
A vacuum does not refer to an opaque body. An opaque body does not allow light to pass through it while a vacuum is simply empty space without air.
A smooth polished surface often acts as a mirror, it is a good reflector of light.
The moon is a non luminous body in the sky. It merely reflects the light from the sun.
A Pinhole camera can not take pictures of moving objects because it only focuses on any image placed before it.
Shadows are not inverted, the always appear upright.
Pb(NO3)2(aq)+2KCI(aq)------- PbCl2(s)+2KNO2 (aq). how many grams of PbCl2 solution will react with a 0.46L of a 0.101m KCI solution
Answer:
6.46g of PbCl2 are produced
Explanation:
The PbCl2 will not react, is a product of the reaction. The question must be say how many grams of PbCl2 will be produced
Based on the chemical reaction:
Pb(NO3)2(aq)+2KCI(aq) → PbCl2(s)+2KNO2 (aq)
1 mole of PbCl2 is produced when 2 moles of KCl are reacting.
To solve this question we must find the moles of KCl that will react. With these moles we can find the moles of PbCl2 and the grams produced using its molar mass:
Moles KCl:
0.46L * (0.101moles / L) = 0.04646 moles KCl
Moles PbCl2:
0.04646 moles KCl * (1mol PbCl2 / 2mol KCl) =
0.02323 moles of PbCl2 are produced
Mass -Molar mass PbCl2: 278.106g/mol-
0.02323 moles * (278.106g / mol) =
6.46g of PbCl2 are producedhi so can help me with something
PLEASE HELP ASAP In the past, California has had many droughts. Which part of the water cycle is not active when a drought is occurring?
precipitation
condensation
transpiration
evaporation
?
Answer :D: evaporation
Explanation: cus i am smart
sorry if i am wrong heh
1. Molarity of 2.6 moles of NaCl in 2.4 L solution of HOH
2. What is the molarity of a 514 mL solution with 0.46 mol of HSO4
3. What is the molarity of a 1000 mL solution with 12.5 mol of NaOH
4. What is the molarity of a solution of 32.5 grams of KCl in 3.5 L of HOH.
5. What is the molarity of a solution with 84.2 g of CuSO4 in 21,612.2 mL of HOH
6. Molarity of 2.2 g of HCl in 61.2 mL of HOH
7. What is the molarity of 241.8 g Fe2O3 in 500 mL of HOH.
All answers need to be rounded to the nearest 0.01
Answer:
Explanation:
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Assume that the variables x and y are directly related. If k = 8, what is the value for each of the following polnts? Be sure
and record your data to be used in the following problem.
Given the reaction: 4 NH3(g) + 5 O2(g) → 4 NO (g) + 6 H2O When 1.20 mole of ammonia reacts, how many moles of water are produced?
Answer:
When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.
Explanation:
The balanced reaction is:
4 NH₃(g) + 5 O₂(g) → 4 NO (g) + 6 H₂O
By stoichiometry of the reaction, the following amounts of moles participate in the reaction:
NH₃: 4 moles O₂: 5 molesNO: 4 molesH₂O: 6 molesThen you can apply the following rule of three: if by stoichiometry 4 moles of ammonia produce 6 moles of water, 1.2 moles of ammonia will produce how many moles of water?
[tex]moles of water=\frac{1.2 moles of ammonia*6 moles of water}{4 moles of ammonia}[/tex]
moles of water= 1.8 moles
When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.
Air pressure doesn't crush you because molecules in air push_________.
◕‿↼ Hey There!
Answer → Air pressure doesn't crush you because molecules in air push ______ → in all directions ←
✨Hope This Helps!✨
The track along which electricity flows is called a:
fuse
circuit
switch
5-O selênio e o enxofre pertencem à família VI A da tabela periódica. Sendo assim, o seleneto e o
sulfeto de hidrogênio são representados, respectivamente pelas fórmulas:
a) HSe e HS
b) H 2 Se e HS
c) HSe e H 2 S
d) H 2 Se e H 2 S
e) H 3 Se e H 3 S
Answer:
Opção D está correta
Explanation:
Conforme indicado no parágrafo -
o selênio e o enxofre pertencem à família VI A da tabela periódica
Seleneto de hidrogênio - H2Se
Sulfato de hidrogênio - H2S
Portanto, a opção D está correta
Complete the following equation for the cracking of the alkane C20H42.
C20H42 → 2C4H8 + 2C2H4 +................................
which elements are out of order in terms of atomic mass. co,Ni or Li,be or I,xe
Answer:
The pair co,Ni is out of order in terms of atomic mass
Explanation:
For co,Ni
Atomic mass of Co = 58.9331 u
Atomic mass of Ni = 58.6934
For Li,be
Atomic mass of Li = 6.941 u
Atomic mass of be = 9.012182 u
For I,xe
Atomic mass of I = 126.90447 u
Atomic mass of Xe = 131.293 u
Hence, the pair co,Ni is out of order in terms of atomic mass
HOW WILL GENETIC MODIFICATION AFFECT OUR SOCIETY AND ENVIRONMENT?
Answer:
“GMOs have helped farmers reduce their environmental footprint by allowing them to use fewer inputs and enabling a shift to reduced tillage. These practices have led to less time spent on a tractor, less fuel used and fewer emissions.
Hope this helps!!!
Which applies to fusion? Check all that apply.
involves the splitting of nuclei
takes place in the Sun
releases radiation as a waste product
occurs in nuclear power plants and is used to generate electricity
plays a role in the production of essentially all elements heavier than helium
releases large amounts of energy
Answer: B, E, and F
Explanation: It showed the correct answer after i got it incorrect. (E2021)
Answer:
A
B
D
E
Explanation:
GOT IT RIGHT ON MY ASSIGNMENT
______________Helps the earth continue to go around the sun
Gravity
Entropy
Magnetism
Inertia
Friction
Help me please dont waste my points
Answer:
H ( I think , I can't understand the given answers but I hope my explanation helps) ^^
Explanation:
Tectonic plate movement under the Earth can create landforms by pushing up mountains and hills. Erosion by water and wind can wear down land and create landforms like valleys and canyons. Both processes happen over a long period of time, sometimes millions of years.
The ______________________________ of freshwater is greatest at 4 degrees Celsius.
A.) cohesion
B.) specific heat
C.) polarity
D.) density
dog water ;-; yes friend
How does increasing the temperature of a system affect the rate of chemical
reactions?
Answer:
Increasing the temperature of a system will increase the rate of a reaction. More particles are moving faster, and have more energy, increasing the overall rate of reaction.
Explanation:
I hope this helps :)