Answer:
They are atoms that make up a subatomic particle
Explanation:
Atoms are made up of protons, neutrons and electrons, also known as subatomic particles. Because an atom is neutral, the number of electrons is equal to the number of protons. Electrons circle the nucleus, which is made up of protons and neutrons.
What happens when lime water is mixed with HCL. write with the balanced equations
Answer:
Gas Evolving Reactions
Explanation:
In this reaction setup, lime water is poured into one of the test tubes and sealed with a stopper. A small amount of hydrochloric acid is carefully poured into the remaining test tube. ... As a result of the acid-carbonate reaction, carbon dioxide is produced and the lime water turns milky.
CaCO
3(s)
+2HCl
(aq)
→2NaCl
(aq)
+H
2
O
(l)
+CO
2(g)
Which contribution to the development of atomic theory was the most impactful?
Answer:
Who contributed the most to the atomic theory?
After Democritus' discovery, new evidence would be found that would eventually lead to the modern atomic theory. John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, James Chadwick and Ernest Schrodinger each contributed greatly to the modern atomic theory by finding the actual evidence.
Explanation:
The process of generating electricity from dams and nuclear power plants is very different, but some of the energy transformations are the same. Which energy transformations occur in both dams and nuclear power plants? Check all that apply.
Answer:
Kinetic energy to mechanical energy, and mechanical energy to electrical energy.
Explanation:
From the Law of conservation of Energy, which state that energy can neither be created nor destroyed but can be transformed from one form to another. Energy transformation is essential in science and technology, in the process of generating electricity from dams and nuclear power plants
some of the energy transformations are the same, the energy transformations occur in both dams and nuclear power plants is Kinetic energy to mechanical energy, and mechanical energy to electrical energy. Kinectic energy is the energy in motion which means the dams is a running water and posses a Kinectic energy then it's is been convert to mechanical energy (which is the macroscopic energy) then to electrical energy by producing light.
Answer:
Explanation:
Kinetic energy to mechanical and mechanical to electrical
What is the complete ionic equation for
NaOH(aq) + HCl(aq) → H2O(1) + NaCl(aq)
Answer:
OH⁻ (aq) + H⁺ (aq) → H₂O (l)
General Formulas and Concepts:
Chemistry
Reaction PredictionStates of MatterSolubility RulesExplanation:
Step 1: RxN
NaOH (aq) + HCl (aq) → H₂O (l) + NaCl (aq)
Step 2: Balance RxN
Reaction is already balanced.
Step 3: Ionic Equations
Total Ionic Equation:
Break up the aqueous solutions into individual ions.
Na⁺ (aq) + OH⁻ (aq) + H⁺ (aq) + Cl⁻ (aq) → H₂O (l) + Na⁺ (aq) + Cl⁻ (aq)
Net Ionic Equation:
Remove spectator ions.
OH⁻ (aq) + H⁺ (aq) → H₂O (l)
The complete ionic equation for the reaction is:
Na⁺(aq) + OH⁻(aq) + H⁺(aq) + Cl⁻(aq) → H₂O(1) + Na⁺(aq) + Cl⁻(aq)
To write the complete ionic equation for the given chemical reaction, we need to break down all the reactants and products into their respective ions (if they are ionic compounds) or molecules (if they are covalent compounds) when they are in an aqueous solution.
The given chemical equation is:
NaOH(aq) + HCl(aq) → H₂O(1) + NaCl(aq)
In this reaction, both NaOH and HCl are strong electrolytes, which means they fully dissociate into ions when dissolved in water.
Therefore, the complete ionic equation for the reaction is:
Na⁺(aq) + OH⁻(aq) + H⁺(aq) + Cl⁻(aq) → H₂O(1) + Na⁺(aq) + Cl⁻(aq)
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Help ASAP I’ll mark you as brainlister be honest please don’t put random stuff
Answer:
Charge of a transition metal
Explanation:
What is the oxidation number of an element? PLz help. Will give brainliest to correct answer. explanation helpful but not required. Dont answer unless you know
Answer:
its eathe a or c a 50/50 chance
Answer:
Explanation:
its B
(please mark as brainliest if it's correct)
no new substance is produced
physical or
chemical change
Which of the following has the ability to turn light energy into chemical energy? A. a generator B. a tree C. water D. an automobile
Answer:
B, trees, they use photosynthesis to do so.
Answer: B
Explanation:
Which of these describes a physical change? Choose the correct answer. You may only choose one.
A. Wood logs are burned in a fire.
B. Coconut oil begins to crystallize after being placed in a freezer.
C. Milk left out of the refrigerator for a week starts to smell different.
D. Sodium hydroxide and hydrochloride acid are mixed in water to form a salt.
Answer:
A. Wood logs are burned in a fire
Explanation:
To solve this, we must know each and every concept behind physical change and Chemical change. Therefore, thee correct option is option A that is wood logs are burned in a fire.
What is physical change?A physical change is characterized by a differences in physical attributes. Melting, transformation to a gas, changes in strength, change in durability, changes in crystal structure, texturing change, shape, color, volume, and density are all examples of physical qualities. Tempering steel to make a knife blade is an instance of a physical change.
Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same
Therefore, thee correct option is option A that is wood logs are burned in a fire.
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Helppppppp plzzzzzzzzz
Answer: C
Explanation:
Cells have different receptors on their surfaces that are responsive to particular signals (such as hormones). When a signal interacts with the particular receptor, a particular response is invoked in the cell. This signal may be produced even by a cell that may be far away from the target cells. This is how cells communicate with each other to maintain homeostasis in the body.
If you know any of them that helps!
Answer:
for the how to get a carrot to float you would need to make a hole in it and make it hollow
Explanation:
A student uses visible spectrophotometry to determine the concentration of CoCl2(aq) in a sample solution. First the student prepares a set of CoCl2(aq) solutions of known concentration. Then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm and constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown concentration.
The original solution used to make the solutions for the standard curve was prepared by dissolving 2.60g of CoCl2 (molar mass 130.g/mol) in enough water to make 100.mL of solution. What is the molar concentration of the solution?
A) 0.200 mol
B) 0.500 mol
C) 1.00 mol
D) 5.00 mol
Answer:
A
Explanation:
2.60 g of CoCl2 was dissolved in water to make 100 mL of solution.
Number of moles of CoCl2 dissolved = mass/molar mass
= 2.60/130
= 0.02 mole
Molar concentration of solutions = number of moles/volume (dm3)
= 0.02/0.1
= 0.200 M
Hence, the molar concentration of thesolution is 0.200 molar.
Correct option = A
A student prepared a solution used to make the solutions for the standard curve by dissolving 2.60g of CoCl₂ (molar mass 130. g/mol) in enough water to make 100. mL of solution. The molar concentration of the solution is 2.00 M.
First, we will convert 2.60 g to moles of CoCl₂ using its molar mass (130. g/mol) as the conversion factor.
[tex]2.60 g \times \frac{1mol}{130. g} = 0.0200 mol[/tex]
0.0200 moles of CoCl₂ are in 100. mL (0.100 L) of solution. The molar concentration of the solution is:
[tex]M = \frac{0.200 mol}{0.100 L} = 2.00 M[/tex]
A student prepared a solution used to make the solutions for the standard curve by dissolving 2.60g of CoCl₂ (molar mass 130. g/mol) in enough water to make 100. mL of solution. The molar concentration of the solution is 2.00 M.
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Why is sublimation such a critical component for the water cycle in cold climates?
Answer:
Sublimation is a critical component for the water cycle in cold climates where water in the solid form or ice is prevalent because sublimation which is the transformation of a solid substance to a liquid without passing through the liquid phase including when ice transforms directly into vapors, readily takes place when the relative humidity is low and the wind is dry, which are conditions that can be found combined mainly in cold climates
Explanation:
is a truck that stops at a station in the town velocity or seed or acceleration?
Answer: Technically 0 SPEED
Explanation: Velocity is movement with a direction, speed is movement in any direction and acceleration is increasing (or decreasing if you wanna get technical) speed with a direction. With that being said, you can still have a moving truck with 0 acceleration. And being stopped, there is no direction the truck is moving, making speed the mosy viable answer.
Answer:
The answer is speed.
Explanation:
It is speed because the truck is slowing down, not going faster like it would if it was accelerating.
[tex]\frac{distance}{time} = speed[/tex]
i'm not great at science, but I hope that helps.
How are the number of neutrons in the nucleus of an atom calculated?
Answer:
To calculate the number of neutrons in the nucleus of an atom is simple. You take the atomic, or proton number of the element, and you subtract it from the element's mass number.
Explanation:
Water particles are composed of Helium and Nitrogen
Answer:
No, Water Particles are composed of 3 Atoms.
2 hydrogen atoms, and 1 oxygen atom
(NH4)CrO7 correct name
Answer:
pubchem
Explanation:
i know i'm in college
but you can look it up
ok last one i promisee
I wanna help but what are you doing here
Answer:
ok thank u so much !
how did henry moseley arrange his attempt at the Periodic Table?
Answer:
When Moseley arranged the elements in the periodic table by their number of protons rather than their atomic weights, the flaws in the periodic table that had been making scientists uncomfortable for decades simply disappeared.
Explanation:
Make sure to edit so you don't get copy-writed
How many molecules are there in 5H20?
A.5
B.7
C.10
D.11
Answer:
the answers B which is 7
How much heat would be released if 300 g of water cooled from 85°C to 25°C
Answer:
75240J
Explanation:
Given parameters:
Mass of water = 300g
Initial temperature of the water = 85°C
Final temperature = 25°C
Unknown:
Amount of heat released = ?
Solution:
The amount of heat released in this cooling process can be calculated using the expression below;
H = m x c x (t₂ - t₁)
m is the mass
c is the specific heat capacity of water = 4.18J/g°C
t is the temperature
Insert the parameters and solve;
H = 300 x 4.18 x (25 - 85) = -75240J
The negative symbol denotes heat loss.
Calculate the energy of a photon with a frequency of 9.78 x 1021 Hz.
Answer:
9.98538 kilohertz
Explanation:
젠장젠장
The first step in deforestation in the Amazon is _______.
a.
logging
b.
farming
c.
ranching
d.
road building
Please select the best answer from the choices provided
Answer:
A) Logging
Explanation:
You have to remove the trees before you can do anything with the land.
The first step in deforestation in the Amazon is logging. Therefore, option A is correct.
What is deforestation ?The term deforestation is defined as the purposeful clearing of forested land. Deforestation has greatly altered landscapes around the world. Deforestation can involve transformation of forest land to farms, ranches, or urban use.
The greenhouse gas emissions are a factor in global warming, altered weather and water patterns, and a rise in the frequency of extreme weather occurrences.
The Amazon rainforest is currently emitting more carbon dioxide than it is absorbing due to deforestation, which is the process of removing forest for purposes such as logging, mining, infrastructure, or urban development.
Thus, option A is correct.
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Suppose that there is an air sample and a water sample, each of the same mass and each with an initial temperature, Tinitial, of 0° C. Now, imagine that both the air and water are heated using sunlight. If the same total amount of energy is added to both samples, which sample will reach a higher temperature, Tfinal? The air or the water?
Answer:
The air will reach a higher final temperature because its specific heat is lower.
Explanation:
Answer:
The air will reach a higher final temperature because its specific heat is lower.
Explanation: right from PLATO so paraphrase a lil bit
What happens to the electo positive
character of elements on moving from
top to bottom in a group
left to right in a period?
Answer:
From top to bottom electropositivity increases
Left to right it reduces
Explanation:
Electropositivity is also known as metallicity. It is a measure of the tendency of atoms of an element to lose electrons. It is closely related to the ionization energy and indeed the electronegativity.
The lower the ionization energy, the more electropositive a substance is. Across the period from left to right, electropositivity or metallicity decreases and from top to down a group, it increases.Hi. I need a comprehensive note on :
Types of Chemical Reaction .
Answer:
The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories.
Explanation:
i need help with question
An element's ability to react with acid is an example of a
A pure substance.
B physical property.
C chemical property.
D melting point.
Answer:
it's chemical property
Explanation:
i took quiz
How much heat would need to be absorbed for 40g of ice to melt?
Answer:
- 19501130 dhakdjsu dhakdjsu 2
Explanation:
In 2011, a computer named Watson competed against two humans on a popular television quiz show and won. Watson listened to each question and responded.
1. What similarities and differences are there between a computer like Watson and the human nervous system?
Answer:
A computer is made up of wires which is like nerves in our body they send signals throughout our bodies and tell us what to do about a situation. The hard drive of a computer is just like our brain which is the main component of the nervous system it controls involuntary, voluntary, movement and coordination. Also, just like the keys and mouse of a computer we have sensory neurons which pick up what is around us by touch.
Explanation:
