Answer:
This happened because of evaporation, the sun evaporated the water.
Answer:
Because if you place the plate filled with water in the sun then a small amount of water will be dried up by the sun's heat.
Name one star from the diagram that is fusing hydrogen into helium
How do solar panels create an electric force field and generate an electric current?
Answer:
Sunlight hits the solar panels, and creates an electric field. The electricity generated flows to the edge of the panel, and into a conductive wire. The conductive wire brings the electricity to the inverter, where it is transformed from DC electricity to AC, which is used to power buildings.
Answer:
Sunlight hits the solar panels, and creates an electric field. The electricity generated flows to the edge of the panel, and into a conductive wire. The conductive wire brings the electricity to the inverter, where it is transformed from DC electricity to AC, which is used to power buildings.
Explanation:
hope this help
brainliest please!!!!
If a decrease in temperature accompanies a reaction, what occurred?
Energy was released.
Energy was destroyed.
Energy was created.
Energy was absorbed.
Surely, when there is a decrease in temperature accompanying a chemical reaction, this indicates that: energy was absorbed.
The correct answer choice is option d.
How energy is absorbed by decreasing temperature in a chemical reaction.In happens that in a chemical reaction which leads to the absorption of energy due to decrease in temperature, this results as a result of the fact that bonds in the reactants of the reaction are broken than it is released
So therefore, we can now deduce and confirm from the explanation given above that it is an endothermic reaction when energy is absorbed by the system.
Read more on reactions:
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3. A student measured 15.0 grams of ice in a beaker. The beaker was then
placed on a hot plate where it was heated uniformly for a certain amount
of time. During the melting process of the ice, the student noted that the
temperature was at O degree Celsius. When all the ice converted to water,
the final temperature was also at 0 degree Celsius. How much heat was
used to melt the ice?
Please help me !
Answer:
The heat that was used to melt the 15.0 grams of ice at 0°C is 4,950 Joules
Explanation:
The mass of ice in the beaker = 15.0 grams
The initial temperature of the ice = 0°C
The final temperature of the ice = 0°C
The latent heat of fusion of ice = 330 J/g
The heat required to melt a given mass of ice = The mass of the ice to be melted × The latent heat of fusion of ice
Therefore, the heat, Q, required to melt 15.0 g of ice = 15.0 g × 330 J/g = 4,950 J
The heat that was used to melt the 15.0 grams of ice = 4,950 Joules.
Plants use a process called photosynthesis to survive. What
evidence proves this process is a chemical change?
A. They turn green and change space
B. They get taller and change size
C. Water is needed
Glucose is created in the chloroplasts
Answer:
D
Explanation:
Glucose is produced through a process powered by sunlight that consumes Carbon Dioxide and produces oxygen as a waste product. In order for glucose to be produced, Carbon dioxide (a compound) must be, in essence, converted into a completely different chemical: dioxygen.
Photosynthesis is biochemical process by which green plants produce energy and release oxygen. Glucose is produced in this reaction and thus it is a chemical change. Thus, option D is correct.
What is a chemical change?The change in a substance if involves any bond making or bond breaking then it is called a chemical change. Whereas, if the substance just changes from one phase or state to the other it is called a physical change.
All chemical reactions are chemical changes involving bond making or breaking or both. Photosynthesis is a biochemical reaction takes place in plant leaves with the aid of light energy.
Photosynthesis involves several stages where an electron transport chain, various oxidising and reducing agents are performing significant roles.
The net reaction in photosynthesis is the combination of water and carbon monoxide to form molecular oxygen and glucose. Therefore, there occurs bond making and breaking. Thus option D is correct.
To find more about photosynthesis, refer the link below:
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How many grams of sugar must be dissolved in 150 ML of water to make a solution that has a concern traction of .6 g/ml
Hey there!:
Density = 0.6 g/mL
Volume = 150 mL
Mass = ?
therefore:
D = m / V
0.6 = m / 150
m = 0.6 x 150
m = 90.0 g of sugar
Hope this helps!
what trends can you see in the melting point and the boiling point of the halogens?
Answer:
The boiling points increase down the group.
Explanation:
The melting and boiling points increase down the group because of the van der Waals forces. The size of the molecules increases down the group. This increase in size means an increase in the strength of the van der Waals forces.
Answer:
Melting and Boiling Points (increases down the group)
The melting and boiling points increase down the group because of the van der Waals forces. The size of the molecules increases down the group. This increase in size means an increase in the strength of the van der Waals forces.
Explanation:
Physical weathering caused by the action of freezing water
Answer:
Frost action involves the ~weathering~ processes caused by repeated cycles of freezing and thawing.
Explanation:
Answer: Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.
Explanation:
A 10.3 L cylinder contains 10.67 moles of Cl2 at 21.2 C. What is the pressure (atm)
Answer:
Explanation:
we know that ideal gas equation is
PV=nRT
P=nRT/V
V=10.3L
n=10.67
T=21.2+273=294
R=0.0821
P=10.67*0.0821*294/10.3
P=25.00atm
Answer:
P = 25.0 atm
Explanation:
Given data:
Volume of gas = 10.3 L
Number of moles of Cl₂ = 10.67 mol
Temperature = 21.2 °C
Pressure of gas = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
21.2+273 = 294.2 K
10.3 L × P = 10.67 mol × 0.0821 atm.L/ mol.K × 294.2 K
P = 257.72 atm.L / 10.3 L
P = 25.0 atm
28. Which statement is INCORRECT regarding radiation?
a. Thicker materials offer better shielding against radiation
b. Gamma radiation is the only type that can cause health effects
c. Traveling further away from a source of radiation reduces your exposure
d. Each type of radiation can be detected by a device called a Geiger counter
Answer:
Radiation is energy. It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects.
Related information in Spanish (Información relacionada en español)
On this page:
Ionizing and non-ionizing radiation
Electromagnetic spectrum
Types of ionizing radiation
Periodic Table
Non-Ionizing and Ionizing Radiation
There are two kinds of radiation: non-ionizing radiation and ionizing radiation.
Non-ionizing radiation has enough energy to move atoms in a molecule around or cause them to vibrate, but not enough to remove electrons from atoms. Examples of this kind of radiation are radio waves, visible light and microwaves.
Ionizing radiation has so much energy it can knock electrons out of atoms, a process known as ionization. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes. Ionizing radiation comes from x-ray machines, cosmic particles from outer space and radioactive elements. Radioactive elements emit ionizing radiation as their atoms undergo radioactive decay.
Radioactive decay is the emission of energy in the form of ionizing radiationHelpionizing radiationRadiation with so much energy it can knock electrons out of atoms. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes.. The ionizing radiation that is emitted can include alpha particles, beta particles and/or gamma raysHelpgamma raysA form of ionizing radiation that is made up of weightless packets of energy called photons. Gamma rays can pass completely through the human body; as they pass through, they can cause damage to tissue and DNA.. Radioactive decay occurs in unstable atoms called radionuclides.
Explanation:
HELP PLS , CHEMISTRY
Answer:
N2H4
Explanation:
Find the mass of the empirical formula, which is 16.03 Take the formula mass and divide it by the empirical mass. This should give you an answer of 2 (well, 1.99 but it is close enough to a whole number to where you can just use 2). Multiply the subscripts of NH2. N has a subscript of 1, so now it will have a subscript of 2. H has a subscript of 2, so it will now have a subscript of 4. Therefore, your answer is N2H4.Which of the following substances contains a covalent bond?
a. NaCl
b. SO2
C. CaO
d. MgCl2
Answer:
B. SO2
Explanation:
An Ionic bond transfurs electrons and occurs with metals and nonmetals
Covalent is the sharing of electrons and occurs with nonmetals only.
what is at the anode and cathode for Silver carbonate(Ag2CO3)
Answer:
bla bla bla bla hahahhaa jokers
can anyone tell me what the +1 in a nuclear symbol stands for?
PLEASE HELP! THIS IS A TIMED QUIZ!!!
Which category do you think this mystery solar system object fits best in?
Made of: Spherical gas
Size: 12x as big as Earth
Orbit time: 152 years
A. Outer Planet
B. Inner Planet
C. Asteroid
D. Dwarf Planet in Kuiper Belt
Answer:
This is an outer planet!
Question 8 helpppppp
Answer:
Explanation:
This is lechatlier's principle, which basically talks about how adding or taking away things will disrupt equilibrium and the system will act a certain way to restore equilibrium
1. adding NH3 causes the equilibrium to shift left - produce more reactants
2. removing N2 causes the equilibrium to shift left - produce more reactants
3. same as number 2
4. decreasing pressure causes equilbrium to shift to the side with more moles so it shifts left and produces more reactants
5. catalyst doesn't change anything about equlibrium, it only affects the reaction's rate
Le Chatelier's principle is a principle which predicts the effect of change in condition on a the position of a equilibrium.
Change could be in Temperature, Moles(Concentration), Pressure.
-------------------------------------------------------------------------------------------------------------
EFFECTS ON EQUILIBRIUM__________________________________________________Temperature:We could change the temperature by increasing or decreasing it, and there are two types of reactions, endothermic or exothermic, both have different outcomes by changing the condition.
__________________________________________________________
In Endothermic,
When we increase the temperature, It will favor the formation of product thus MORE PRODUCT will be formed - equilibrium will shift towards right i.e. product side.
When we decrease the temperature, It will favor the formation of reactants thus MORE reactant will be formed - equilibrium will shift towards left i.e. reactants side.
__________________________________________________________
In Exothermic,
When we increase the temperature, It will favor the formation of reactants thus MORE REACTANT will be formed - equilibrium will shift towards left i.e. reactants side.
When we decrease the temperature, It will favor the formation of product thus MORE PRODUCT will be formed - equilibrium will shift towards the right i.e. product side
_____________________________________Pressure:When we increase the pressure, The equilibrium shifts towards the fewer moles of a gas. Wherever there are less moles, it could be any, reactant or product, the increase of Pressure will favor in formation of them.
When we decrease the pressure, The equilibrium shifts towards the more moles of a gas. So whether reactants or product have the higher moles, the decrease in pressure will favor in the formation of them.
_____________________________________Concentration of moles:When we increase the concentration of moles of any substance, The equilibrium will shift away from that substance. So if we want to make more product and there are more moles of reactant present, then Increase the concentration of reactants.
When we decrease the concentration of any substance, The equilibrium will shift towards that substance. So if we want to make more product, decrease its concentration or add more reactant.
_____________________________________Catalyst:By the use of the catalyst, There is no effect on the equilibrium. The rate of both forward and backward reaction are increased with the equal amount.
_____________________________________Question:By keeping that in mind,
A) Extra [tex]NH_{3}[/tex] will shift the equilibrium towards left i.e. more reactants will be formed.
B) Extra N2 is removed, the equilibrium will shift towards the left i.e. more reactants will be formed.
C) N2 is added, the equilibrium will shift towards right i.e. more PRODUCT will be formed. (I assumed there was a typing error and it meant Addition instead of removal)
D) When we decrease the pressure the equilibrium will shift towards the left i.e. more reactant will be formed.
E) Catalyst has no effect on the system
_____________________________________Best Regards'Borz'What is the formula Trisilicon tetra nitride
what deterilnines whether or not an atom is boron
Answer:
Has 5 protons and the atomic number is 5.
Explanation:
The atomic number is equal to the number of protons and every element has a different number of protons. Therefore, finding how many protons there are and comparing to atomic numbers (or vice versa) would allow you to find if the atom is boron.
How can you tell the difference between a balanced equation or unbalanced equation?
Answer:
By counting the number of atomic number
A molecular formula shows the arrangement of the atoms in a molecule. True or False?
Answer:
The answer is true
Explanation:
Which situation demonstrates dormancy?
A plant germinates in the spring.
A plant grows leafs laterally.
A plant closes its flowers at night.
A plant becomes inactive and stops growing.
Answer:
Your answer is D
Explanation: Have a nice day or night
(❁´◡`❁)
Answer:
A plant becomes inactive and stops growing!!!
(aka D)
I got it right if you got it right leave a like
Explanation:
pleasee helpppp
i have posted this many times m=but no one has helped :(
will mark brainliest!! :)
Answer:
its 1 transferd electrons 2 shared electrons 3 metal only
Explanation:
Answer:
1 transferd electrons 2 shared electrons 3 metal only
Explanation:
A cylinder at left with balls evenly spaced throughout the cylinder with an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.
Which change of state is shown in the model?
condensation
deposition
boiling
freezing
Answer:
deposition
Explanation:
Answer:
B
Explanation:
How many atoms of oxygen are in a molecule of glucose
(C6H12O6)
Answer:
6 oxygen atoms
Explanation:
Which reason explains why gas bubbles are released when a carbonated beverage is opened?
Find the mass of AlCl3 that is produced when 3.58 moles of Al2O3 react with excess HCl according to the following equation.
Al2O3(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2O(l)
Moles of Al2O3, m = 3.58 moles.
We need to find the mass of AlCl3 produced.
Solution :
1 mole of Al2O3 produce 2 moles of AlCl3.
So, 3.58 moles of AlCl3 produce 7.16 moles of AlCl3.
Mass of AlCl3 produced is :
m = moles × molecular mass of AlCl3
m = 7.16 × 133.34 g
m = 954.714 g
Therefore, mass of AlCl3 produced is 954.714 g.
Hence, this is the required solution.
SHOW ALL WORK! Partial
How many words can Jamie type in 2 days if she can type 62 words per minute?
1 day = 1440 minutes
2 days = 2880 minutes
2 days = 62 words per minute× 2880 minutes
2 days = 178560 words
Therefore she can type 178560 words in 2 days if she can type at 62 words per minutes
can Fossil Fuels harm?
Burning fossil fuels emits a number of air pollutants that are harmful to both the environment and public health. Sulfur dioxide (SO2) emissions, primarily the result of burning coal, contribute to acid rain and the formation of harmful particulate matter.
Answer:
No
Explanation:
Because they helps us to make oil and is not harmful to us
Give a scenario in which a good conductor in heat would come in handy.
CO, + H2O –H^2 CO^3 The reaction is which type of chemical reaction?
Answer:
Combination reaction or synthesis reaction
Explanation:
Given reaction:
CO + H₂O → H₂CO₃
The type of reaction shown above is a combination or synthesis reaction. A combination reaction is one in which a single product is formed from two or more reactants.
In the given reaction carbon monoxide combines with water to produce hydrogen carbonate.
The formation of compounds from the union of their constituent elements falls into this category of reactions.