The equation for the decomposition of water into its elements is 2H2O(l) → 2H2(g) + O2(g).
The decomposition of water involves breaking the water molecule (H2O) into its constituent elements, hydrogen (H2) and oxygen (O2). The balanced equation for this reaction is 2H2O(l) → 2H2(g) + O2(g).
In this equation, the state symbols indicate the physical states of the substances involved: (l) represents liquid, and (g) represents gas. The coefficient "2" in front of H2O indicates that two molecules of water are involved in the reaction.
When the decomposition reaction occurs, water molecules break apart, forming hydrogen gas and oxygen gas. The reaction requires the input of energy, typically in the form of heat or an electric current, to initiate the decomposition.
This reaction is commonly observed during the process of electrolysis, where an electric current is passed through water to separate it into hydrogen and oxygen gases. The liberated hydrogen and oxygen gases can then be collected and used for various applications.
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Which sample of matter is classified as a substance
Answer:
Elements and Compounds. Any sample of matter that has the same physical and chemical properties throughout the sample is called a substanceAny sample of matter that has the same physical and chemical properties throughout the sample.
Explanation:
54. Given the density of lead to be 11.4 g/cm' and a sample mass of 32 g what is the volume of this sample of
lead?
Which sub-atomic particle is NOT found at the center of the atom?
Answer:
Protons and neutrons are in the nucleus (the center of an atom), but electrons are not.
. One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
Answer:
200g or 40 teaspoons
Explanation:
An average human, weighing about 50 pounds, has about 200 g or 40 tps of NACl
Choose the example that is a protein:
•bread
•enzyme
•ORNA
•sugar
Answer:
I think bread is the answer
What would happen to other populations if they didn't have limitng factors?
Answer:
In the natural world, limiting factors like the availability of food, water, shelter and space can change animal and plant populations. Other limiting factors, like competition for resources, predation and disease can also impact populations. Other changes in limiting factors will cause a population to decrease.
Which phase of the moon is shown?
O full moon
O first quarter
O waning gibbous
O waxing crescent
(b) Describe how Aluminium chloride can be separated from a mixture of aluminium chloride
and sodium chloride
Answer:
Since AlCl3 sublimes and NaCl does not sublime sublimation process will separate the two. Heat the mixture, aluminium chloride sublimes into vapour and forms the sublimate on the cooler parts of heating tube sodium chloride will remain at the bottom of the heating tube.
Explanation:
I hope it helps you ..
how do you solve that
If you shine the world’s brightest flashlight at a black hole, will the light shine through the black hole, or will the black hole consume the light?
yes the flaslight would beconsumed by the black hole. So yeah
Explanation:
Answer:
if you were to aim a powerful-enough flashlight at the Moon right now, the light would reach it in a little more than a second—maybe before you got to the end of this sentence. . If you aimed your flashlight in its direction, toward the constellation Sagittarius, the light would arrive there sometime around the year 3600.
Explanation:
is camphor heated a physical/chemical change
Answer:
when it is heated it changes to vapor, which is a physical change
Explanation:
This atom has two neutral charged subatomic particles and two negatively charged subatomic particles. What is this atom?
Hydrogen
Helium
Oa
Oь
ос
Od
Lithium
Beryllium
Answer: helium is the answer
Scientists have discovered a new element number 120 (note 119 was NOT discovered).
The number of valence electrons will likely be ?
and charge will likely be
?
Sam wants to dissolve a drink mix quickly before she goes to school. She
adds 2 teaspoons of the drink mix to a glass that contains 8 ounces of
room-temperature water. What could Sam do that would best help to
speed up the dissolving?
Sam can stir the water after adding the drink mix to help increase or speed up the dissolving process in this scenario.
What is Dissolution?This is the process in which a solute dissolves in a solvent to form a solution under certain conditions.
Stirring will increase the surface area thereby leading to an increase in the dissolving process which makes it the most appropriate choice.
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Why are Li Na and k Placed in the same group of the periodic table?
Answer:
Their valence electrons/properties
Explanation:
Elements in the same group of the periodic table have the same amount of valence electrons, which determines how they bond with other elements in other groups. This also determines their properties such as their reactivity. Since Li, Na, and K are in the same group, they must have similar properties and the same amount of electrons in their outermost shell.
What is the theory of plate tectonics an what evidence supports it?
It’s science not chemistry
Answer:
Modern continents hold clues to their distant past. Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed.
what particle is bigger Fr or Fe3+ why?
Answer:
Fe2+ is greater in size as it has lost less electrons than Fe3+ . So, the nuclear pull is more strong on Fe3+ decreasing the atomic size. Thus Fe2+ is greater in size.
Explanation:
The radioactive isotope Uranium-235 has a difference of ________________________ in comparison to Uranium-238.
A) 3 less Neutrons
B) 3 Less Protons
C) 3 Less Electrons
D) No mass change, only a change in charge
Answer:
A) 3 less Neutrons
Explanation:
Uranium - 235 and Uranium - 238 have the same amount of protons because they are the same element: 92 protons.
However, U - 235 has 143 neutrons while U - 238 has 146 neutrons. U - 238 has a mass of 3 neutrons more.
How many atoms of each element are present in the compound
a compound includes more than two elements but is a pure substance
Explanation:
hope this helped
Calculate the atomic mass of nitrogen if the two common isotopes of
nitrogen have masses of 14.003 amu (99.63% abundance) and 15.000 amu
(.37%)
Answer:
Atomic mass of nitrogen = 14.0067 amu.
Explanation:
Isotopes can be defined as two or more forms of a chemical element that are made up of equal numbers of protons and electrons but different numbers of neutrons.
Generally, the isotopes of a chemical element have the same chemical properties because of their atomic number but different physical properties due to their atomic weight (mass number).
The two isotopes of nitrogen are nitrogen-14 and nitrogen-15.
Given the following data;
Relative abundance of N-14 = 99.63%
Atomic mass of N-14 = 14.003
Relative abundance of N-15 = 0.37%
Atomic mass of N-15 = 15.000
The atomic mass is;
14.003 × (99.63/100) + 15.000 × (0.37/100)
Atomic mass = 14.003 × (0.9963) + 15.000 × (0.0037)
Atomic mass = 13.9512 + 0.0555
Atomic mass = 14.0067 amu.
Therefore, the atomic mass of nitrogen is 14.0067 amu.
Considering the definition of atomic mass, isotopes and atomic mass of an element, the average mass of nitrogen is 14.0067 amu.
First of all, the mass number A of an atom is the sum of the number of protons and the number of neutrons in the atomic nucleus.
Being the number of protons the atomic number, the same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.
On the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes.
In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.
In this case, you know that the two common isotopes of nitrogen have masses of 14.003 amu (99.63% abundance) and 15.000 amu (0.37%). Then, the average mass of lithium can be calculated as:
14.003 amu×0.9963 + 15.000 amu×0.0037= 14.0067 amu
Finally, the average mass of nitrogen is 14.0067 amu.
Learn more:
brainly.com/question/14403750?referrer=searchResults brainly.com/question/10043246?referrer=searchResults brainly.com/question/15553207?referrer=searchResultsEvery spring has an equilibrium position. Which statements describe a spring at its equilibrium position ? Check all that apply.
The spring constant is zero.
The elastic potential energy is at a maximum.
The elastic potential energy is zero
The displacement of the spring is at a maximum.
The net force acting on the spring is zero.
Answer:
The elastic potential energy is zero.
The net force acting on the spring is zero.
The statements correct about the equilibrium position of Spring has been that the elastic potential energy and the net force acting on the spring has been zero at the equilibrium position. Thus statements C and E are correct.
The spring displacement can be described by Hooke's law. According to Hooke's law, the force required for the stretching and compression of the spring has been dependent on the spring stretch, and the spring constant.
The spring constant has been a non-zero quantity. Thus statement A is incorrect.The elastic potential energy of the spring has been the energy stored in the spring. At the equilibrium position, the elastic potential energy of the spring has been zero, as there has been the total kinetic energy.Thus statement B is incorrect, and C is correct.
The displacement of the spring at equilibrium position has been zero. Thus statement D is incorrect.The net force acting on the spring has been zero at the equilibrium position. Thus statement E is correct.For more information about the spring equilibrium position, refer to the link:
https://brainly.com/question/10737887
hellpppppoppopppppppp
Answer:
C
Explanation:
it's always colder at night and close to night especially near water and that's when wind tends to blow the most
using the clues in the text you can determine environmental toxicologist studies how chemicals affect the environment
A- true
B- faulse
What most likely led to a change in the widely accepted theory of evolution? new experiments involving genes and evolution experiments with Darwin's original hypotheses changes that Mendel made to his laws of genes studies of evolution without Mendel's laws
Incomplete question. Full question reads;
Darwin developed the theory of evolution to explain why there are so many different kinds of living things. He could easily observe that offspring of any animals were slightly different from their parents and that this could allow for big changes over thousands of years. He did not know that genes caused the differences. Genes are now very important in the modern theory of evolution.
What most likely led to a change in the widely accepted theory of evolution?
Answer:
new experiments involving genes and evolution
Explanation:
Indeed, the original theory of evolution has experienced several changes in its acceptance because of its imperfect and wrong assumptions not based on generally acceptable scientific facts,
Hence, new experiments involving genes and evolution has led to a change (disagreements and few agreements) in the widely accepted theory of evolution.
Answer:
The answer is A
Explanation:
1. What can you conclude about the figure?
a. The arrow locations represent precision.
b. The arrow locations represent both high accuracy and
good precision.
c. The arrows have been thrown accurately toward the
bulls-eye.
d. The arrow locations represent neither accuracy
nor precision.
Answer : The correct option is, (d) The arrow locations represent neither accuracy nor precision.
Explanation :
Precision : It is defined as the closeness of two or more measurements to each other.
For Example: If we measure a length 4 times and we get 5.8 m each time. Then the measurement is very precise.
Accuracy : It is defined as the closeness of a measured value to a standard or known value.
For Example: If the weight of the substance is 40 kg and one person measures 39.9 kg and another person measures 39.8 kg. Then, the weight measured by first person is more accurate.
Hence, we from this we conclude that the arrow locations represent neither accuracy nor precision.
Answer : The correct option is, (d) The arrow locations represent neither accuracy nor precision.
Explanation :
Precision : It is defined as the closeness of two or more measurements to each other.
For Example: If we measure a length 4 times and we get 5.8 m each time. Then the measurement is very precise.
Accuracy : It is defined as the closeness of a measured value to a standard or known value.
For Example: If the weight of the substance is 40 kg and one person measures 39.9 kg and another person measures 39.8 kg. Then, the weight measured by first person is more accurate.
Hence, we from this we conclude that the arrow locations represent neither accuracy nor precision.
3.. Which type of graph would be most helpful for comparing the calorie-content in a variety of
different cereal brands?
a. Line graph
b. Pie chart
C. Stem-and-leaf plot
d. Bar graph
Answer:
d. Bar graph
Explanation:
a. Line graph - this type of graph is best for continuous data, such as how a the sales of a particular cereal drop over time
b. Pie chart - this is best for % data, such as looking at the % of different nutrients (carbohydrates, fats, proteins) in a cereal
C. Stem-and-leaf plot - presents quantitative data such as the ages of people who buy a brand of cereal
d. Bar graph - this is best for plotting different numbers in distinct categories to compare them to one another
I need help doing this please. It’s an image
Answer:
k+
Ba2+
Al3+
K+
S2-
you may think that if it has a + it would be bigger, but it is actually the opposite.
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01 23 54 Diaz, Emireth
HSPS 20-21 CA Heat and Phase Changes (AKS 7d, e, & f) 13 of 20
II Paus
In 1906, a 600 g diamond was found at the Premier Mine in South Africa- the world's largest uncut diamond. Suppose the diamond's
temperature changed by 2 as it was cut. If the specific heat capacity of diamond is 710 J/gt, how much energy was transferred to the
diamond by the heat?
O A 0.59)
B. 2.36
OC 426,000 ]
OD 852,000)
Answer:
The amount of energy transferred to the diamond while being cut is thus Q = 852000 J
Explanation:
Since quantity of heat transferred Q = mcΔθ where m = mass of substance , c = specific heat capacity of substance and Δθ = temperature change.
Now, given that for diamond, m = mass of diamond = 600 g, c = specific heat capacity of diamond = 710 J/g°C and Δθ = temperature change = 2 °C.
So, the amount of energy transferred to the diamond while being cut is thus
Q = mcΔθ
Q = 600 g × 710 J/g°C × 2 °C
Q = 852000 J
So, the amount of energy transferred to the diamond while being cut is thus Q = 852000 J
which of the following metamorphism is affected by heat and reactive fluid
Indicate which element of the following pairs has the greater electronegativity
Answer:
sodium,silicon
Explanation:
sodium=11
siicon=14
