Answer:
B: Since 1979, the sun's output has decreased while the Earth has warmed more rapidly than in any 30-year period for centuries.
Explanation:
What does temperature surround when the kinetic energy is moving fast ?
When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.
In chemistry, we define the temperature of a substance as the average kinetic energy of all the atoms or molecules of that substance. Not all of the particles of a substance have the same kinetic energy. At any given time, the kinetic energy of the particles can be represented by a distribution.
In physics, temperature is defined as the average kinetic energy of the particles in an object. ... When particles move more quickly, temperature is higher and an object feels warmer. When particles move more slowly, temperature is lower and an object feels cooler.
乁(ᵔヮᵔ)ㄏ
Consider the Hertzsprung Russell diagram seen here. We can use this diagram to classify stars and determine their characteristics.
The color of a star is determined by its temperature: the hottest stars are blue and the coolest are red. The Sun has a surface
temperature of 5,500°C and it appears yellow. The diagram also indicates that temperature coincides with luminosity: the hotter the
star, the higher the luminosity. You can also tell the size of each star from the graph as the larger the radius, the higher the
temperature and luminosity. Regardless of a star's position in the diagram, the energy that results in high temperatures and the stars
luminosity is generated by what process?
W
A)
nuclear fusion
B)
nuclear fission
gravitational forces of swirling gases
D)
friction generated by gravitational force
Answer:
Explanation:
A- nuclear fusion
What type of reaction does this illustration represent?
A. synthesis
B. decomposition
C.single-replacement
D.double replacement
Answer: IS B
Explanation:
Decomposition
Drag each tile to the correct box,
Arrange the processes of the water cycle in the correct order, starting with the heat from the Sun.
Answer:
4
3
2
6
1
5
I hope this helped!
ILL GIVE YOU BRAINLIEST!!The type of biome that we live in here in Knightdale, NC is what? *
1 point
A Tundra
A Savannah
A Tropical Rainforest
A Temperate Deciduous Forest
A Temperate Rainforest
A Boreal Forest
Answer:
Temperate Deciduous Forest
Explanation:
How is the AHfusion used to calculate the energy needed to melt a mass of
solid?
O A. Grams solid x mol/g < 1/AHfusion
B. Grams solid x mol/g < AHfusion
C. Grams solid x g/mol * A Hfusion
D. Grams solid g/mol < 1/AHfusion
Answer:
C I think from what I did to solve!!
Answer: Grams solid x mol/g x AHfusion
Explanation:
A 5.00 L sample of gas at 1.00 atm and 20 degrees Celsius is compressed to 2.00 L at 2.00 atm. What is the temperature of the gas?
Answer:
234.4 K
Explanation:
Using the combined gas law equation as follows;
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the provided information,
P1 = 1.00atm
P2 = 2.00 atm
V1 = 5.00L
V2 = 2.00L
T1 = 20°C = 20 + 273 = 293K
T2 = ?
Using P1V1/T1 = P2V2/T2
1 × 5/293 = 2 × 2/T2
5/293 = 4/T2
Cross multiply
293 × 4 = 5 × T2
1172 = 5 T2
T2 = 1172 ÷ 5
T2 = 234.4 K
What is the molarity of a 9.13 L soda that contains 13.83 of sugar?
Answer:
1.52 M
Explanation:
Molarity of a solution is calculated as follows:
Molarity = number of moles (n) ÷ volume (V)
Based on the information given in this question,
Volume of soda (V) = 9.13 L
number of moles = 13.83 mol
Molarity = 13.83 ÷ 9.13
Molarity = 1.52 M
When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas write the balanved equation
Answer: When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].
Explanation:
The word equation is given as maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas.
Now, in terms of chemical formulae this reaction equation will be as follows.
[tex]MnO_{2} + HCl \rightarrow H_{2}O + MnCl_{2} + Cl_{2}[/tex]
Here, number of atoms on reactant side are as follows.
Mn = 1O = 2H = 1Cl = 1Number of atoms on product side are as follows.
Mn = 1O = 1H = 2Cl = 4To balance this equation, multiply HCl by 4 on reactant side and multiply [tex]H_{2}O[/tex] by 2 on product side. Therefore, the equation can be rewritten as follows.
[tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex]
Hence, number of atoms on reactant side are as follows.
Mn = 1O = 2H = 4Cl = 4Number of atoms on product side are as follows.
Mn = 1O = 2H = 4Cl = 4Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.
Thus, we can conclude that when maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].
Can someone please check my answer?
yes correctly ☺️☺️
Explanation:
thank you ❣️
NEED ANSWER FAST
Using the following equation
Pb(SO4)2 + 4 LiNO3 à Pb(NO3)4 + 2 Li2SO4
How many grams of lithium nitrate, LiNO3, will be needed to make 7.14 grams of lithium sulfate, Li2SO4, assuming that you have an adequate amount of lead (IV) sulfate, Pb(SO4)2, to do the reaction?
Answer: _____ rams LiNO3 (Round your answer to the nearest hundreths)
Answer:
.-.
Explanation:
Which two planets are the largest? Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
Answer:
Jupiter and Saturn are the two biggest planets
When the head of a match burns, chemical reaction is taking place. But a certain amount of energy is required to get this reaction started. This is the reactions activation energy. Describe where this energy comes from. What provides this energy?
Answer:
Rubbing the match against a rough surface
The activation energy is provided by friction between surfaces
Explanation:
Activation energy is the energy required to start a chemical reaction. It is the minimum energy that must be supplied for a reaction to proceed.
When we strike a match against a rough surface, what we are trying to do is to supply the required activation energy in the form of friction in order to get the combustion reaction started.
Hence, the activation energy for the combustion of a match head is supplied by friction when the match head is struck against a rough surface.
What is the volume if 1.5 mol of gas has a pressure of 700 torr at 15°C?
Answer:
V = 38.48 L
Explanation:
Given that,
No. of moles = 1.5 mol
Pressure, P = 700 torr
Temperature, T = 15°C = 288 K
We need to find the volume of the gas. The ideal gas equation is given by :
[tex]PV=nRT\\\\V=\dfrac{nRT}{P}\\\\V=\dfrac{1.5\times 62.36\times 288}{700}\\\\V=38.48\ L[/tex], R = L.Torr.K⁻¹.mol⁻¹
So, the required volume is equal to 38.48 L.
3. If a gas has a pressure of 32.1 psi at a temperature of 25°C, then what is the new pressure if the temperature is increased to 75°C?
Answer:
baho kag bilat sige ka ug palubut
Explanation:
sige ka ug eyut
2
Which of the following equations is not balanced?
A Fe +S → FeS
B
KOH + HCl → KCI + H2O
2Mg + O2 + 2Mgo
D
NaCl + H2SO4 → Na2SO4 + HCI
Answer:
equation (D) is not balanced
balanced
2NaCl + H2SO4 —> Na2SO4 + 2HCl
The chemical equation not balanced is:
NaCl + H₂SO₄ → Na₂SO₄ + HCI
What is the balanced chemical equation?A chemical equation can be described as the reactants involved in the reaction, products produced, and an arrow denoting the direction of the chemical reaction. The chemical equation is a way to represent the chemical reaction in a short way.
A balanced equation in which the number of atoms of each element is equal on both sides of the chemical equation.
The law of conservation of mass is needed to follow while balancing the equation. The total mass of the elements on both sides (reactant and product side) in a balanced chemical equation.
NaCl + H₂SO₄ → Na₂SO₄ + HCI is not a balanced chemical equation as the number of hydrogen and sodium on both sides. The balanced chemical equation will be:
2 NaCl + H₂SO₄ → Na₂SO₄ + 2 HCI
Learn more about the balanced chemical equation, here:
brainly.com/question/28294176
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Es un cambio natural o provocado, donde se produce energía para agua y dióxido de carbono: a)Precipitación. b)Fermentación c) Efervecencia. d) Combustión.
Answer:
d) Combustión.
Explanation:
¡Hola!
En este caso, dado que estamos enfocados en el concepto de cambio químico, el cual se caracteriza por exhibir un cambio en la composición e identidad de las sustancias iniciales (reactivos) a otras finales (productos).
Ahora bien, como se nos dice que los productos de este cambio químico son energía, agua y dióxido de carbono, inferimos que el nombre de este proceso es d) Combustión, por ejemplo la combustion del gas natural para calentar nuestras comidas en la cocina.
¡Saludos!
HELP PLEASE !!!!
Which of the following statements is correct?
A. plastics are never used in hip replacement because they wear out quickly
B. genetically modified corn requires more pesticides that the non-modified plant
C. plastic tubing has been successfully used to repair diseased blood vessels
D. drugs do not affect any chemical processes in the body
How many moles of helium are needed to fill a balloon to a volume of 5.3 L at 22 ℃ and 632 mmHg?
Answer:
0.18 moles
Explanation:
Applying,
PV = nRT................... Equation 1
Where P = pressure, V = volume, n = number of moles, R = molar gas constant, T = temperature.
make n the subject of the equation
n = PV/RT............... Equation 2
Given: V = 5.3 L, T = 22 °C = (22+272) K = 295 K, P = 632 mmHg = (0.00131579×632) = 0.8316 atm, R = 0.083 L.atm/K.mol
Substitute these values into equation 2
n = (0.8316×5.3)/(0.083×295)
n = 0.18 moles
what are radioactive tracers used for
Answer:
Radioactive tracers are widely used to diagnose industrial reactors, for instance by measuring the flow rate of liquids, gases and solids.
Explanation:
Radioactive tracers are widely used to diagnose industrial reactors, for instance by measuring the flow rate of liquids, gases and solids. A radioactive tracer is a chemical compound in which one or more atoms have been replaced by a radioisotope.
heres the link for more information
https://www.iaea.org/topics/radiotracers#:~:text=Radioactive%20tracers%20are%20widely%20used,been%20replaced%20by%20a%20radioisotope
.
!!!!!!!!!!!HELPPPP!!!!!!!!!!! IT'S A TEST!
A forest fire began when lightning struck a tree.
A. Describe this type of reaction as either a chemical or physical reaction? Why?
B. Is the reaction endothermic of exothermic? Why?
All of the following are empirical formulas except:
C2H3O2
C6H6
CHO2
CH2O
What is the molarity of a strong acid solution with a pH of 3?
Answer:
Since HCl is a strong acid, it completely ionizes, and the pH of HCl in solution can be found from the concentration (molarity) of the H+ ions, by definition equal to 0.100 M. (The conjugate base of the acid, which is the chloride ion Cl–, would also have a concentration of 0.100 M.) The pH is thus –log(0.100) = 1.000.
Explanation:
1. If 80.0 ml of 3.00 M HCl is used to make a 100. ml of dilute acid, what is the molarity
of new dilute HCl solution?
We are given:
M1 = 3 Molar V1 = 80 mL
M2 = x Molar V2 = 100 mL
Finding the molarity:
We know that:
M₁V₁ = M₂V₂
where V can be in any units
(3)(80) = (x)(100)
x = 240/100 [dividing both sides by 100]
x = 2.4 Molar
2. If a gas at 500 mL has a temperature of 45°C, then what is the new volume when the temperature is increased to 65°C? Show your work.
Answer:
531.45 mL
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 500 mL
Initial temperature (T₁) = 45 °C
Final temperature (T₂) = 65 °C
Final volume (V₂) =?
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 45 °C
Initial temperature (T₁) = 45 °C + 273
Initial temperature (T₁) = 318 K
Final temperature (T₂) = 65 °C
Final temperature (T₂) = 65 °C + 273
Final temperature (T₂) = 338 K
Finally, we shall determine the final volume of the gas. This can be obtained as follow:
Initial volume (V₁) = 500 mL
Initial temperature (T₁) = 318 K
Final temperature (T₂) = 338 K
Final volume (V₂) =?
V₁/T₁ = V₂/T₂
500 / 318 = V₂ / 338
Cross multiply
318 × V₂ = 500 × 338
318 × V₂ = 169000
Divide both side by 318
V₂ = 169000 / 318
V₂ = 531.45 mL
Therefore, the new volume of the gas is 531.45 mL
In which type of chemical reaction would two reactants join together and form one product
Answer:
Synthesis Reaction
Explanation:
A synthesis reaction occurs when two or more reactants combine to form a single product. In a decomposition reaction, one reactant breaks down into two or more products. This is the reverse of a synthesis reaction. Replacement reactions occur when elements switch places in compounds.
Which property is shared by both acids and bases?
1. changes red litmus paper to blue
2. feels slippery
3. conducts electricity in aqueous solution
4. tastes sour
O 1
2
4
3
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
3. Conducts electricity in aqueous solution.
ThanksHope it helps.Li + HCl → H2 + Lici
How can you use the periodic table to determine the charge of an ion?
Answer:
memorise them
Explanation:
1, 2, skip metals, 3, 0, -3, -2, -1
please help!!
a motorcycle that travels north 201m in 7s d= t= v=
Answer:
d=0.4cm
t=0.25km
v=7s of 100m
i hope it helps you
this is my asnwer
correct me if im wrong
#carryonlearning
