Answer:
Explanation:
it assigns a color for various temps, frequencies, and wave lengths. basically if you have a temprature of something you can use the electromagnetic spectrum to find the color of the object, the frequencies, and wave lengths, etc.
what type of reaction occurs between sodium and calcium fluoride
1. How much heat does 23.0 g of water absorb as its temperature increases from 25.4 °C to 42.8 °C?
2. A sample of unknown metal has a mass of 120.7 g. As the sample cools from 90.5 °C to 25.7 °C, it releases 7020 J of energy. What is the specific heat of the sample?
Answer:
Q = 1672.84 j
c = 0.898 J/g.°C
Explanation:
1) Given data:
Mass of water = 23.0 g
Initial temperature = 25.4°C
Final temperature = 42.8° C
Heat absorbed = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Specific heat capacity of water is 4.18 J/g°C
ΔT = 42.8°C - 25.4°C
ΔT = 17.4°C
Q = 23.0 g × × 4.18 J/g°C × 17.4°C
Q = 1672.84 j
2) Given data:
Mass of metal = 120.7 g
Initial temperature = 90.5°C
Final temperature = 25.7 ° C
Heat released = 7020 J
Specific heat capacity of metal = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 25.7°C - 90.5°C
ΔT = -64.8°C
7020 J = 120.7 g × c × -64.8°C (Negative sign shows heat is released)
7020 J = 7821.36 g.°C × c
c = 7020 J / 7821.36 g.°C
c = 0.898 J/g.°C
Finn is investigating how energy affects objects. He adds energy to an object as shown.
Will the energy he has added cause the object to move?
no, because the light energy from the battery will change its mass
no, because heat energy from the battery will change its temperature
yes, because the battery’s mechanical energy will make the motor run
yes, because the battery’s electrical energy will make its wheels turn
Answer:
Yes because
Explanation:
Answer:yes because the battery's electrical energy will make the wheels turn.
cual es el simbolo quimico que tiene 55 protones ?
Answer:
The answer for this question is Cs
What is CO2?????????
Answer: carbon dioxide
Explanation: because it is 1 carbon and 2 oxygen, and two means di-.
Aluminum metal reacts with hydrochloric acid to produce solid aluminum chloride and hydrogen gas. how many moles of aluminum are needed to produce 1.2 moles of hydrogen gas?
Moles of Aluminum needed : 0.8
Further explanationGiven
1.2 moles H₂
Required
moles of aluminum
Solution
The reaction coefficient in a chemical equation shows the mole ratio of the components of the compounds involved in the reaction (reactants and products)
Reaction(balanced equation)
2Al + 6 HCl = 2AlCl₃ + 3H₂
From the equation, mol ratio of Al : H₂ = 2 : 3, so mol Al :
= 2/3 x mol H₂
= 2/3 x 1.2
= 0.8 moles
help i just need some help with thos
The balanced equation below shows the products that are formed when butane (C4H10) is combusted.
2C4H10 + 1302 ——>8CO2 +10H20
What is the mole ratio of butane to carbon dioxide?
2:8
1:5
13:8
13.:10
Answer:
2:8
Explanation:
The reaction equation is a given as:
2C₄H₁₀ + 130₂ → 8CO₂ + 10H₂O
From the reaction equation, the mole ratio is 2:8
Butane is C₄H₁₀
Carbon dioxide CO₂
From the reaction;
2 moles of butane will produce 8 moles of carbon dioxide
Answer:
A) 2:8
Explanation:
Took the quiz and was right
Sort the resources into the correct category based on whether they are renewable or nonrenewable.
wnd
power
Renewable Resources
Nonrenewable Resources
steel
apple trees
hydroelectric powwer
coal and oil
gemstones
Wind power and hydroelectric power are renewable resources whereas, steel, gemstones, apple tress coal and oil etc. are non- renewable sources. Hence, they cannot be regenerated when exhausted.
What are renewable sources ?Renewable sources are resources that can used for longer period or eternal. They can be regenerated and reused even after consumption of the existing amount. Wind power, solar power, hydroelectric power etc. are renewable sources and they are nature genuine.
Non- renewable sources are those which cannot be regenerated once they are exhausted. For example, petroleum, coal, oil, diesel etc. are non-renewable because, once they completed from the earth, they cannot be regenerated or excavated.
Non-renewable sources are creating pollution by the production of toxic hydrocarbon gases as well. Gemstones are non renewable because, once they consumed, they cannot be generated.
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16.
Magnesium reacts with hydrochloric acid according to the equation below.
Magnesium bertindak balas dengan asid hidroklorik mengikut persamaan berikut.
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
What is the volume of hydrogen gas produced at room condition if 0.6 g of
magnesium is added to the excess of sulphuric acid?
[Relative atomic mass : Mg = 24 : molar volume = 24 dmº mol' at room condition]
Berapakah isipadu gas hidrogen yang dihasilkan pada keadaan bilik jika 0.6 g
magnesium ditambahkan kepada asid hidroklorik berlebihan."
[Jisim atom relative:Mg = 24 : isipadu molar = 24 dm mol! pada keadaan bilik]
A 0.6 cm
B 6.0 cm
C 60.0 cm
D 600 cm
How many lone pairs of electrons should the nitrogen have?
Answer:
Nitrogen has one lone pair of electrons
Explanation:
The above two dots in picture are lone pair
Tungsten fits best into which category?
A. molecule
B. element
C. compound
D. mixture
Tungsten is an element. It is located in the d -block of periodic table. Thus it is a transition metal. Hence, option B is correct.
What is tungsten ?Tungsten is 74th element in periodic table. It is a transition metal thus, located in the d-block of periodic table. Tungsten has the chemical symbol W. Tungsten was first identified as an element in 1781.
The maximum melting temperature of any known element other than carbon, 3,422 °C, is reached by the unbound element, making its resistance all the more remarkable (which sublimes at atmospheric pressure). Tungsten has a boiling point of around 5930°C.
A few of the many alloys that contain tungsten and have many applications include radiation shielding, X-ray tubes, electrodes in gas tungsten arc welding, superalloys, and incandescent light bulb filaments.
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Why it is necessary for plants to have chloroplasts?
In your own words, please
Chloroplasts is an important part in the process of photosynthesis in some organisms. The chloroplast absorbs the energy in sunlight and uses it to produce sugars.
The main function of chloroplast in plants is to convert light energy into chemical energy via the photosynthesis process.
What is the role of chloroplasts in plants?Photosynthetic chlorophyll is found in chloroplasts, which catch sunlight and converts it into chemical energy, releasing oxygen from water. All green plants and algae have chloroplasts. Chloroplasts help plants in the formation of food.
Chloroplasts are found in the leaves of the plant's guard cells. Chloroplasts contain a lot of chlorophyll, which helps to trap sunlight. The chloroplast is capable of reproducing without any help from the rest of the cell.
The primary job of chloroplast is to produce food through the photosynthesis process. Chloroplast has a component called chlorophyll, which traps sunlight and is used for food synthesis or sugar and other organic molecules in all green plants. They also form lipid components and amino acids that are required for chloroplast membranes.
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One of Newton's laws uses the equation F= ma. Which statement describes the meaning of this equation?
Answer:
Newton's second law of motion describes the relationship between an object's mass and the amount of force needed to accelerate it.
Explanation:
Ca(OH) =CaO + H2O
2.
MgO + H2O Mg(OH)
3.
CH4 + 202 - CO2 + 2H20
4.
2KCIO3 -- 2KCI+ 302
5.
NH3 + H20 NH OH
6.
Zn + 2HCI ZnCl2 + H2
7.
Add page
acer
Answer:
2 combustion
3 combustion
4 decomposition
5 replacement
6 Decomposition
Note:
Im not really sure if those r right.
It may be right actually.
To solve such this we must know the concept of chemical reaction. Therefore, the type of reaction can be given as below. To know the type of reaction we must balance the reaction first.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
balanced equation types of chemical reaction.
Ca(OH)[tex]_2[/tex] [tex]\rightarrow[/tex]CaO + H[tex]_2[/tex]O decomposition
MgO + H2O [tex]\rightarrow[/tex] Mg(OH)[tex]_2[/tex] combination
CH[tex]_4[/tex]+ 2O[tex]_2[/tex] [tex]\rightarrow[/tex]CO[tex]_2[/tex] + 2H[tex]_2[/tex]O combustion
KCIO[tex]_3[/tex] [tex]\rightarrow[/tex]2KCI+ 3O[tex]_2[/tex] decomposition
NH[tex]_3[/tex] + H[tex]_2[/tex]O[tex]\rightarrow[/tex] NH [tex]_4[/tex]OH combination
Zn + 2HCI [tex]\rightarrow[/tex]ZnCl[tex]_2[/tex] + H[tex]_2[/tex] displacement
Therefore, the type of reaction can be given as above.
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What Elements that have an atomic number less than 37 and atomic mass greater than 78.4u?
Answer:
krypton
bromine
selenium
The __ increases by 1 as you go left to right across the periodic table.
A. Atomic mass
B. Atomic number
C. Number of neutrons
D. Number of ions
The __ increases by 1 as you go left to right across the periodic table.
A. Atomic mass
B. Atomic number
C. Number of neutrons
D. Number of ions
Answer C
what is the smallest atomic radius
Answer:
Helium
Explanation:
Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus.
Please help: A 0.200 M NaOH solution was used to titrate a 18.25 mL HF
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
The molar concentration of the original HF solution : 0.342 M
Further explanation
Given
31.2 ml of 0.200 M NaOH
18.2 ml of HF
Required
The molar concentration of HF
Solution
Titration formula
M₁V₁n₁=M₂V₂n₂
n=acid/base valence (amount of H⁺/OH⁻, for NaOH and HF n =1)
Titrant = NaOH(1)
Titrate = HF(2)
Input the value :
[tex]\tt 0.2\times 31.2\times 1=M_2\times 18.25\times 1\\\\M_2=0.342[/tex]
18. How far does Larry move if traveling at 2m/s for 100s?
Answer:
200 m
Explanation:
Given data:
Speed of larry = 2 m/s
Time taken = 100 s
Distance travelled = ?
Solution:
Formula:
d = st
d = distance
s = speed
t = time
by putting values,
d = 2 m/s× 100 s
d = 200 m
Please Help! Thank You
That would be 1.0033 meters, hope this helps ^^
Answer:
39.5 in = 1.0033 meter
Explanation:
What is the probability of parents with allele combinations Ff and FF having an offspring that is FF?
What is the percent composition of C3H8?
Answer: Hydrogen - 18.286%( mass present)
Carbon - 81.714%(mass present)
Explanation:
Mass percentage does not have any unit as numerator and denominator contains the same unit. Therefore, the percent composition of C and H in C[tex]_3[/tex]H[tex]_8[/tex] is 81.8% and 18% respectively.
What is percentage by mass?Mass percentage represents the the percentage of each element that is making a particular compound.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
Atomic weight of different element of calcium phosphate
C= 12g/mol , H=1g/mol
Total mass of Carbon element in C[tex]_3[/tex]H[tex]_8[/tex] = 12 × 3 = 36
Total mass of hydrogen atom in C[tex]_3[/tex]H[tex]_8[/tex] = 1 × 8 = 8
Total molar mass of C[tex]_3[/tex]H[tex]_8[/tex] =36 + 8 =44 g/mole
Percentage of carbon in C[tex]_3[/tex]H[tex]_8[/tex] =36/44× 100 =81.8%
Percentage of hydrogen in C[tex]_3[/tex]H[tex]_8[/tex] =(8÷44)×=18%
Therefore, the percent composition of C and H in C[tex]_3[/tex]H[tex]_8[/tex] is 81.8% and 18% respectively.
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Scientific Notation and Significant Figures Problem:
Answer:
84130.44698 and 8.413044698*10^4
Explanation:
Using the phase diagram for CO2, what phase is carbon dioxide in at 20°C
and 25 atm pressure?
A. It is at its melting point.
B. It is at its boiling point.
C. It is in the gas phase.
D. It is in the liquid phase.
Answer:
since the temperature is approximate to room temperature at a small pressure of 25atm, carbon dioxide is in gas phase.
Answer:
Explanation:
C. It is in the gas phase.
model and Schrodinger's atom model?
Explanation:
the model assumes that the electron is a wave and tries to describe the regions in space orb orbitals where most likely to be found
How many grams of K2SO4 are in:
Answer:
174.2 grams
Explanation:
This compound is also known as Potassium Sulfate.
The SI base unit for amount of substance is the mole.
1 mole is equal to 1 moles K2SO4, or 174.25 grams.
please help ASAP and show work will make brianlist answer 1-3
Answer:
#1. single replacement 2 1 2 1
#2. synthesis 1 3 1
#3. combustion 1 5 3 4
Two atoms of the same element cannot have different numbers of _____.
a. particles c. protons
b. neutrons d. electrons.
Answer:
c. protons
Explanation:
A "proton" is a subatomic particle that is stable and is positively-charged. You will identify the number of protons that is present in the nucleus of a chemical element by its "atomic number." It gives us an identity of the element, therefore, every atom of the same element have the "same" number of protons. For example, the number of protons for "Hydrogen" is 1. This means that even if you have two atoms of Hydrogen, each of them has "1" as the number of proton.
What happen when? sodium oxide reacts with HCL
Answer:
Sodium oxide reacts exothermically with cold water to produce sodium hydroxide solution. A concentrated solution of sodium oxide in water will have pH 14. ... For example, it reacts with dilute hydrochloric acid to produce sodium chloride solution.
