Answer:
electroluminescence is a production of light by the flow of electrons, as within certain crystals. An example is at most resataurants with a bright sign that either says open or closed.
Explanation:
what is the conjugate base of HC6H6O6-
Answer:
the conjugate base of the compound is
C6h6O2/6-
Explanation:
subscript
The conjugate base of [tex]\rm HC_6H_6O_6^-\; is \; C_6H_6O_6^-[/tex].
What are conjugate acids and bases?Conjugate acid is the acid that donates a hydrogen ion to a base, conjugate acid contains a hydrogen ion.
The base that gains a hydrogen ion from a conjugate acid is called the conjugate base.
The acid is NH4 converts into a conjugate base NH3-
When a conjugate acid donates a hydrogen ion, it converts into the conjugate base.
Thus, the conjugate base is [tex]\; C_6H_6O_6^-[/tex]
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1. Which of these is not a natural part of
Soil is a mixture of minerals, organic matter, water and air. The minerals come from bits of broken-down
rock. Organic matter is material that is alive or used to be alive. It includes leaves, twigs, bugs and many
microscopic, or tiny, organisms like bacteria and fungi. In fact, there are more microorganisms in a handful
of soil than there are people on the planet. Soil is needed for life to exist on Earth. It contains many
nutrients that help plants grow. Then the plants provide nutrients that help animals grow
A. pebbles of different sizes
B. plastic bottle caps
C. dead worms
D. plant roots
When a predator population increases what happens to the prey population? Increase Decrease Dies Stays the same
Answer: as the number of predators increases, more prey are captured. as a result the prey population starts to decrease.
How much energy is required to raise the temperature of 3 kg of iron from 20°
C to 25°C? Use the table below and this equation: Q = mcAT.
Answer:
The correct option is (c).
Explanation:
Given that,
Mass of iron, m = 3 kg = 3000 g
The temperature of ice increases from 20° C to 25°C.
The specific heat of iron is 0.45 J/g°C
We need to find the energy required to raise the temperature. The formula is given by :
[tex]Q=mc\Delta T\\\\Q=3000\times 0.45\times (25-20)\\\\Q=6750\ J[/tex]
So, 6750 J of energy is required to raise the temperature or iron.
Identify the product(s) of the following reaction:
H
2
2
CO
3
3
→ H
2
2
O + CO
2
2
A
H
2
2
CO
3
3
B
H
2
2
and O
3
3
C
H
2
2
O and CO
2
2
D
O and O
2
2
Answer:
H20
Explanation:
means water but might not help
How many moles of magnesium are required to react with 2.0 mol of hydrochloric acid? The equation for this reaction is Mg + 2HCl → MgCl2 + H2.
Answer:
1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.
Explanation:
The balanced reaction is:
Mg + 2 HCl → MgCl₂ + H₂
The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products. That is, the law of conservation of mass implies that the sum total of charges before and after the chemical reaction remains constant.
The relationships between the quantities of reactants consumed and products formed depend directly on this conservation law, and therefore can be determined by an equation that describes them. This equality is called the stoichiometric equation.
In this case, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), you have:
Mg: 1 moleHCl: 2 molesMgCl₂: 1 moleH₂: 1 moleThen, 1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.
Answer:
1 mole of magnesium, Mg
Explanation:
The balanced equation for the reaction is given below:
Mg + 2HCl —> MgCl₂ + H₂
From the balanced equation above,
We can see clearly that 1 mole of Mg requires 2 moles of HCl.
Thus, 1 mole of magnesium, Mg is needed for the reaction.
If a scale floated by and an astronaut stood on it, what would the scale say?
1.0kg
2.1/6 normal weight
3.9.8 m/s2
4.1/6 normal mass
What is a mixture? Plz help
Answer:
a substance made by mixing other substances together.
Explanation:
Answer:
a mixture is different things put together
Explanation:
write importance of magnesium metal
Answer:
can be used in fireworks, flares and sparklers
Explanation:
as it burns in air it ignites with bright light
Which of the following is an example of a parasite?
a. A flea that bites an animal and sucks its blood to survive.
b. An orchid flower that sits on a tree branch
c. The bacteria that live in human intestines and help humans digest things.
d. An Egyptian plover that cleans a crocodile's teeth.
hmm helpo?
Answer:
a sorry if im wrong
Explanation:
What molecules would you expect to find in air
Answer:
The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.
Explanation:
Answer:
nitrogen, oxygen, carbon dioxide, water vapour, ozone, helium, and hydrogen.
Explanation:
what element is solid at room temperature shiny malleable and a good conductor of heat
Answer:
I believe that it would be copper because copper is all of those things.
Explanation:
If a 60-g object has a volume of 30cm3 what is its density
Answer:
2 g/cm3
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
Therefore d = 60g/30cm3 = 2 g/cm3
Copper carbonate decomposes to make _____________ oxide and _____________ dioxide
Answer:
Copper carbonate decomposes to copper oxide and carbon dioxide.
Explanation:
3. Your friend's new car can go from 0 to 60 m/s in 7 sec. What is the acceleration?
Answer:
Initial velocity (u) = 0 m/s
Final velocity (v) = 60 m/s
Time (t) = 7 sec
Acceleration (a) = ?
a = (v-u)/t
a = (60-0)/7
a = 60/7
a = 8.57 m/s²
Photosynthesis is a process that can be performed by many autotrophic organisms within the ecosystem. Without photosynthetic organisms, the food chain would not be able to sustain the energetic needs of the ecosystem. Whic statement compares the energy transformations that occur in the ecosystem within photosynthetic organisms?
A Solar energy is converted to thermal energy, which increases food availability for the ecosystem.
B Solar energy is converted into chemical potential energy, which is found in the products like glucose.
C Chemical erlergy in carbon dioxide is converted into solar energy, which provides a mechanism to produce food for the ecosystem.
D Kinetic energy of the reactants is converted to potentia. energy in the products, which can be metabolized within the ecosystem.
Answer:
B.
Solar energy is converted into chemical potential energy, which is found in the products like glucose.
Explanation:
According to photosynthesis phenomena ,the statement which compares energy transformations in ecosystem within photosynthetic organisms is statement B.
What is photosynthesis?It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.
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WHAT IS THE CHEMICAL REACTION
Answer:
hi
Explanation:
Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.
-facts
How are the four kinds of DNA nucleotides different from each other?
Answer:
The sugar in DNA is deoxyribose. ... Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring.
Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.
What are nucleotides ?Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.
Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.
The quantity of phosphate residues that a nucleotide has determined its name. Adenosine triphosphate, for instance, is the name of a nucleotide that consists of an adenine base and three phosphate residues (ATP). Adenosine diphosphate would be the nucleotide if it has two phosphates (ADP).
Thus, Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA.
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The difference between asexual and sexual reproduction is _______. Please help me with this, thank you.
Answer:
hope this helped.
Explanation:
Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent.
A list of changes is shown.
Temperature decreases
Intermolecular bonds become weaker
Freezing
Intermolecular bonds become stronger
Evaporation
Temperature increases
Vibration of molecules slows down
Molecules vibrate faster
Which of the above changes would be accompanied by an increase of the kinetic energy of particles in a liquid?
A, B, C, and H
A, C, D, and G
B, E, F, and H
B, C, F, and G
Answer:
b,c,f,g
Explanation:
it makes the most sense plus i just took the test <3 good luck
With an increase in the kinetic energy of the solid molecule the intermolecular bonds become weaker, temperature increases, melting and molecules vibrating faster are changes.
What is the effect of the increased kinetic energy?Kinetic energy is the form of the energy that is present in an entity in motion. When the kinetic energy is increased then the temperature of the particles increases and leads to evaporation.
The increased kinetic energy weakens the intermolecular bonds of the liquid particles and the molecules of the particles start vibrating fast.
Therefore, option b. intermolecular bonds become weak, option e. evaporation, option f. temperature increases and option h. molecules vibrate faster are the changes.
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someone who is good at chemistry please help me
Write a word equation and a formula equation for each chemical reactions
A) Solid calcium reacts with chlorine gas to produce solid calcium chloride.
B) Nitrogen gas reacts with solid Iodine to produce nitrogen triiodide gas.
5.25 ml of substance A has a mass of 3.9 g and 6.24 ml of substance B has a mass of 4.4 g. Which liquid is more dense?
Answer:
A is more dense
Explanation:
The is because you can find the density of anything by dividing the Mass by volume A is .7428 and B is .7051 . There fore A is denser .
what do carbon dioxide and global temperatures do together?
Answer:
When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down
Explanation:
Answer: when the carbon dioxide concentration goes up the temperature goes up. when it goes down the temperature goes down
Explanation:
Extra points if anyone can help me with those 2
Answer:
Blank 1 - Microscope
Blank 2 - Cell Theory
Explanation:
Answer:
microscope. and cell theory
Explanation:
with the invention of the microscope. scientists were able to create cell theory
I am a celestial body that does not produce light. I orbit a planet
HELP ASAP!!!
can someone help be determine the formulas for reactants and products as well as balance the equation, and what type of reaction is presented!!!!
I will make you the brain list!!!
Answer: owa owa
Explanation: owa owa owa owa
A sample of gas has a volume of 2.0 liters at a pressure of
1.0 atmosphere. When the volume increases to 4.0 liters, at constant temperature, the pressure will be
a. 0.50 atm
b. 2.0 atm
c. 0.25 atm
d. 1.0 atm
How much work does Bobby perform in pushing a 35 N crate a distance
of 4 meters?
Answer:
Here's the answer pretty thang = 140 N
Explanation:
List Known Values-
35N
4M
Formula-
W=FJ
Substitution-
W= 3.5N (4m)
Answer & Units-
140 N
Bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.
What is work?The work is something which need energy to be done it can be any physical or chemical energy that can be calculated with the help of Newton law.
Work is calculated by multiplying the force required for the work by the amount of movement of substance or object.
W = F × d here, W = work
F = force
d = distance
Substituting the value in the formula,
W = 35 × 4
W = 140 joules
Newton-meter is the same thing as a joule so the unit is joules.
Therefore, bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.
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Claim: Sound is not matter. Which piece of evidence supports this claim?
Sound is made of atoms and has a specific density.
Sound is created when molecules vibrate in a medium,
Sound takes up space and can be weighed on a scale.
Sound does not have mass or volume, it is a form of energy.
Answer:
Sound Energy is a form of Mechanical Energy
How is the division of animal/human cells different from the division of plant cells?