Answer:
2CO >>> 2C + O2
........
Heated gaseous atoms of elements emit light in unique colored patterns as electrons drop from
excited energy states to ground energy states. Heated hydrogen atoms have only four colored
lines, red, green, blue and violet. What prediction did Niels Bohr make about electrons based on
this information?
Answer:
b
Explanation:
Determined which equation is balanced or unbalanced.
Answer:
1. balanced
2.unbalanced
3.unbalabced
4.balanced
Have you ever seen a building that looks as if it were made out of mirrors? These buildings are made using reflective glass. How would
replacing clear windows with reflective glass affect the temperature inside the building? Explain your ideas.
Answer:
the sun would reflect off of the windows causing less heat to travel into the building
Explanation:
A reaction begins with 130.5g of substance X and substance Y. How many grams of
substance X and Y are there at the end of the reaction?
A) not enough information provided
B) 100g
C) 65.25g
D) 130.5g
Answer:
130.5g
Explanation:
At the of the reaction, the combined mass of X and Y will be 130.5g.
The premise for this conclusion is based on the law of conservation of matter.
This law states that "in a chemical reaction, matter is neither created nor destroyed but changed from one form to another".
In essence, in a chemical reaction, there is no mass loss.
The amount of product in the reaction is expected to be the same as the amount of reactants used in the experiment. When we start with 130.5g then we should end with 130.5gWhat element is in period 6 with 2 valence electrons?
Answer:
Barium
Explanation:
I think that's the answer
The element in period 6 with 2 valence electrons is Barium.
The periodic table has been organized into periods and groups. The period is in an horizontal arrangement while group is vertical arrangement. The elements that can be found in period 6 are Beryllium, Magnesium, Calcium, Strontium, Barium etc. Elements in the same group have the same number of valence electrons. This means that elements in group 2 have 2 valence electrons. Barium possess two valence electrons because it is in group 2 and it is also in period 6. Therefore, the element in period 6 with 2 valence electrons is Barium.Learn more at: https://brainly.com/question/24089206?referrer=searchResults
Which is an example of an object increasing its kinetic energy
Question 3 options:
an airplane after landing on a level runway.
a rocket before launch.
a train stopped at the station.
a mouse running faster after spotting a cat.
Answer:
The answer to this question is the A choice. A rocket before launch.
Explanation:
In the definition of kinetic energy, it says: In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
which two elements make up the main structure of an organic compound?
A. Carbon and oxygen
B. Nitrogen and oxygen
C. Carbon and hydrogen
D. hydrogen and sulfur
Answer:
b nitrogen&oxygen
Explanation:
i'm built different
When an egg is boiled in a pot of water on the stove, there is more than one kind of heat transfer. Heat is transferred from the stove to the pot directly since they are physically touching. Heat is also transferred from the pot to the egg, carried through the water.
Answer:
Stove → Pot = conduction, Pot → Egg = convection.
Explanation:
There are three ways in which heat is being transferred from one medium to the other and the means are; radiation, conduction and convection heat transfer.
Radiation is the process in which heat is being transferred through emission in form of electromagnetism. Conduction heat transfer Is the process in which heat is being transferred through contact that is two bodies touching each other. Convection heat transfer is the kind of heat that happens through gases.
Since the heat from the stove touching the pot is the conduction heat transfer.
After the water has been heated up, the gas from the water makes the convection heat transfer.
What is the percent of SO2 in H2SO4?
Help Please
The percent of SO₂ in H₂SO₄ : 65.3%
Further explanationProust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements
%Mass A in AxBy =
[tex]\tt \dfrac{x.Ar~A}{MW~A_xB_y}\times 100\%[/tex]
For SO₂ in H₂SO₄ :
MW SO₂ = 32 + 2.16=64 g/mol
MW H₂SO₄ =2.1+32+4.16=98 g/mol
The percent of SO₂ :
[tex]\tt \dfrac{64}{98}\times 100\%=65.3\%[/tex]
Many ladybird beetles live in Pedro's garden. He observed them one summer for a science project. Pedro noticed that all the ladybird beetles had red shells. Some of the beetles had many dark spots, some had only a few dark spots, and one or two beetles had no dark spots at all. Around the same time, Pedro's father replanted the garden using just red flowers. A few years later, Pedro observed the ladybird beetles again. This time he noticed that almost all the ladybird beetles had shells with more red visible. They had few or no dark spots on their shells. Pedro concluded that replanting the garden with red flowers caused a change in the ladybird beetle population. Which best explains Pedro's observations?
Answer:
No.
Explanation:
No, Pedro's observations does not suggest that replanting the garden with red flowers caused a change in the ladybird beetle population because the colour of flower has no effect on the change in the population of ladybird beetle, it must be occur due to the dominant genes present in the population of ladybird beetle. This dominant genes is responsible for the presence of more red colour on the ladybird beetles shells.
I need this answer. any thing will help
Answer: condensaytion
Explanation: its reverse vaporation instead of water turning into gas gas turns into water
What type of reaction is this?
Zn + K2 CrO 4 --> K + ZnCro4
A) single replacement
B) double replacement
C) decomposition
D) synthesis
Answer:
a) single replacment........................
Please Help ASAP 100 points! Students set up a controlled experiment. They put five crickets in each of three identical containers. They set one container to 15C, one to 20C and one to 25C. Then they count the number of cricket chirps in each container during 1 hour. What are the TWO constants in this experiment? A: The number of crickets in each container. B:The temperature of each container. C: The number of cricket chirps. D: The kind of containers used.
Answer:
A and C.
Explanation:
Write one paragraph explaining what you have learned so far about Kinetic and Potential Energy.
(will give brainliest)
Answer: Energy stored in an object due to its position is Potential Energy. The energy that a moving object has due to its motion is Kinetic Energy. All forms of kinetic energy are the result of a previous state of potential energy. For example, the stored chemical potential energy of a battery converts to electrical kinetic energy to transport electricity to a light bulb, which radiates thermal kinetic energy. Potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
The illustration below shows the human skeletal system. Use the illustration to any questions at follow
Skull
Facial Cranium
bones
Clavice
Scapula
Humerus
Vertebral
column
Sternum
Una
Ribs
Radius
Sacrum
Carpals
Metacarpals
Phalanges
Tarsels
-Femur
-Patella
-Tibia
Fibia
Metatarsels
Phalanges
Using the illustration, which function do the bones of the skull mainly perfom?
A. They allow movement
B. They produce proteins
C. They protect tissues and organs
D. They connect muscles to tissues
im pretty sure its C, if im right please give me brainlist
The function where the bones of the skull mainly perfom should be that they protected the tissue and organs.
What is tissue and organs?Here the tissue and organs should be considered as the basic structural units with respect to the bodies.
Here the tissues should be comprise of the cell collections that have the same kind of function while on the other hand, the organ should be the tissue collections.
Therefore, it protected the tissue and organs.
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Kate wrote the steps of the carbon cycle to describe how carbon is cycled through specific organisms. The steps are in random order.
1 - The rabbit decomposes.
2 - The rabbit eats the carrot plant.
3 - The carrot plant takes in carbon dioxide from the air during photosynthesis.
4 - Carbon compounds are returned to the soil.
Which lists the steps in order?
2, 3, 1, 4
3, 2, 1, 4
3, 4, 2, 1
2, 4, 3, 1
3, 2, 1, 4
Further explanation:The process of photosynthesis is the process of converting carbon dioxide and water into energy in the form of carbohydrates using sunlight. Usually done by plants that have leafy za called chlorophyll.
Carbohydrates themselves are formed from the C-carbon, H-hydrogen and O-oxygen components
Rabbit food is carrots that contain carbohydrates, which are part of the photosynthesis process
3. The carrot plant takes in carbon dioxide from the air during photosynthesis.
Reaction
6CO₂ + 6H₂O ⇒ C₆H₁₂O₆ + 6O₂
2. The rabbit eats the carrot plant.
Rabbits meet their carbohydrate source for energy by eating carrots
1. The rabbit decomposes.
Rabbits in time will experience a process of decomposition
4 - Carbon compounds are returned to the soil.
The carbon content in rabbits will also be decomposed into the soil again
Answer:
3,2,1,4
Explanation:
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You have a shiny metal disc that weighs 1.31 kg that you want to find out what its made of. When you put the disc into a graduated cylinder with 5L in it, you see that the water level rose by about 125 mL. You have a list of densities for various shiny metals: silver= 10.5 g/ mL, nickel= 8.9 g/mL, titanium = 4.5 g/mL, and rhodium = 10.7 g/ mL. What is the disc made of?
Answer:
The disc is made of silver.
Explanation:
To solve this question we need to calculate the metal's density. To do so we need its mass (already given by the problem, 1.31 kg) and its volume.
Following Archimedes' principle, the volume of water displaced by the disk is equal to the disk's volume. This means the metal's volume is 125 mL.
Now we convert 1.31 kg into g, to better compare with the given options:
1.31 kg * 1000 = 1310 gFinally we calculate the metal's density:
Density = Mass / VolumeDensity = 1310 g / 125 mL = 10.48 g/mLLooking at the densities given by the problem, the closest one is silver.
What is the name of the family with an oxidation number of +2?
a. Halogens
b. Alkali Earth Metals
c. Noble Gasses
d. Transition Metals
Answer:
Alkali Earth Metals
Explanation:
The oxidation number is equal to the charge which is determined by the valence electrons. Alkali Earth Metals all have 2 valence electrons and, therefore, an oxidation number of 2.
Answer:
+2alkaline earth metal and +1 oxidation number is alkali metal
Explanation:
alkali is Arabic word means ash
what three geologic events occur due to movement of material within the earth
Answer:
Convection currents are a circular current caused by the difference in temperatures from the bottom to the top of the mantle. It is because of these currents that the plates of the Earth have moved in the past and are moving today. These plate movements cause earthquakes, mountain building, and volcanism.
Explanation:
lonic bonds form between metals and
o metalloids O nonmetals o metalloids
How many atoms of S are in the following formula: 3Na(SO4)2
1) 6
2) 8
3) 3
4) 5
Answer:
6
Explanation:
Provide background information about different types of chemical reactions.
Synthesis Reactions
Decomposition Reactions
Single Replacement Reaction
Double Replacement Reaction
Combustion
Then explain, in a general sense, how you will determine which of the above types of reactions are occurring in your experiments.
Answer:
.
Explanation:
-Synthesis reactions are reactions that appear when two distinct atoms or molecules engage to structure a specific molecule or compound. Most of the time, when a synthesis response occurs, electricity is launched and the response is exothermic. However, an endothermic consequence is additionally possible.
-A decomposition response starts offevolved from a single substance and produces extra than one substance; that is, it decomposes. One substance as a reactant and greater than one substance as the merchandise is the key attribute of a decomposition reaction. For example, in the decomposition of sodium hydrogen carbonate (also recognized as sodium bicarbonate)
-A single-replacement response (sometimes referred to as a single-displacement reaction) is a chemical response in which one aspect is substituted for every other factor in a compound, producing a new aspect and a new compound as merchandise
-A double-replacement response (sometimes referred to as a double-displacement reaction) takes place when components of two ionic compounds are exchanged, making two new compounds. A attribute of a double-replacement equation is that there are two compounds as reactants and two distinctive compounds as product
-A combustion response happens when a reactant combines with oxygen, many instances from the atmosphere, to produce oxides of all different factors as products; any nitrogen in the reactant is transformed to elemental nitrogen, N2. Many reactants, referred to as fuels, incorporate normally carbon and hydrogen atoms, reacting with oxygen to produce CO2 and H2O
A chemical reaction may involve one or more reactants to yiled one or more products.
Types of reactionsBelow we are going to discuss the types of reaction under the following headings;
Synthesis reaction - This is a reaction in which two or more substances come together to yiled a single product.
Decomposition reaction - This involves the breakdown of a substance into new substances.
Single Replacement Reaction- This is a type of reaction in which an atoms replaces another in a compound.
Double Replacement Reaction - This is a reaction in which cations exchange anion partners in a reaction
Combustion - This is a reaction in which a substance is burnt in oxygen.
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How might water high specific heat capacity affect energy distribution and temperature on earth
Answer:
Water can hold a lot of heat inside it and as the climate starts getting cold, the water releases the heat which heats up the climate
Due to the fact that water has a high heat capacity, its temperature has a very limited range, which causes the coastal areas close to having a similar small daily and seasonal temperature range.
What is specific heat capacity?"When the temperature of a material rises 1 K (or 1 °C), the amount of heat (J) absorbed per unit mass (kg)".
When the weather begins to grow chilly, water releases the heat it has stored inside, warming the environment.
High specific heat of the water makes it temperature resistant, and it helps the earth to maintain its temperature and helps organisms to maintain their functions at a constant temperature of the earth.
Thus, the normal temperature is necessary for maintaining the temperature of the earth and the water bodies maintain the temperature of the earth.
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When halogens react with metals,they form salts called....
When halogens react with metals,they form salts called metal halides according to their electronic configuration according to which reaction takes place.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.
Answer:
Explanation:
While trying to write the chemical formula for a compound (a neutral molecule), one must identify and exchange the charge of the cation with that of the anion to become the subscript of one other. For example
Aluminium oxide has Aluminium (Al) and oxygen (O); since Al has a charge of 3+ (the cation) and O has a charge of 2- (the anion), the compound would have it's charges as Al³⁺O²⁻ and when the charges are exchanged to there subscripts, it would form Al₂O₃; thus there would be two cations of aluminium for every three anions of oxygen in order to have a neutral molecule.
This same explanation can be given to Aluminium sulfite. Aluminium sulfite has Aluminium (Al) and sulfite (SO₃). Al has a charge of 3+ (cation) while sulfite has a charge of 2- (anion), with the compound having it's charges as Al³⁺(SO₃)²⁻ and when the charges are exchanged to there subscripts, it would form Al₂(SO₃)₃ and would thus have 2 cations of aluminium (Al³⁺) for every 3 anions of sulfite (SO₃³⁻) in order to have a neutral molecule.
What happens when the two atoms are Too close
the electrons of each atom will be attracted to both nuclii.
How many valence electrons does this atom have? (Urgent)
Answer:
It only has 7 valence electrons because there are seven electrons in the highest orbital.
Explanation:
When light pases through a prisim,white light will be separated into different colors. which statment best explains this observation?
Answer:
It's B
Explanation:
The classic rainbow is made of certain colors, so If a white light passed through a glass prism [and only glass] the rainbow would show because of the colors bending [the naked eye can't see that 0-0]
Also, you know the sky is blue right?? The color blue in that prism when the light shined over was the shortest and wavy color. each color has it's own wave. blue is just the shortest and waviest one.
I WILL GIVE BRAINLEST IF YOU ANSWER THIS QUESTION QUICKLY!!!
what is an orbital?
Answer:
Electric Patterns and has many different variations.
Explanation: