Answer:
[tex]3 Mg(s) + N_2(g) = Mg_3N_2(s)[/tex]
Explanation:
The valance of magnesium atom is [tex]+2[/tex]
While the valence of nitrogen atom is [tex]- 3[/tex]
Let us first write the first half-reactions
[tex]Mg ---> Mg^{2+} + 2e^{-}[/tex]
The second half reaction is
[tex]2N + 6e^- -----> N_2[/tex]
Adding the above two reactions and writing the final reaction, we get -
[tex]Mg + N2 = Mg_3N_2[/tex]
The balance equation is
[tex]3 Mg(s) + N_2(g) = Mg_3N_2(s)[/tex]
What is the % of each element in Al2(CrO4)3
Answer:
Al = 13.4% Cr = 38.8% O = 47.7
Aluminium Chromium Oxygen
Please give brainliest.
The percentage composition of each element in aluminium chromate is Al = 6.4% Cr = 38.8% O = 47.7%.
What is an element?It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
Percent composition of aluminium-26/401.94×100=6.4%,percent composition of chromium-51.99/401.94×100=38.80%,percent composition of oxygen-192/401.94×100=47.76%.
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Is CuS an ionic, non polar or polar covalent bond and why
Answer:
Ionic
Explanation:
Answer:
Ionic Bond
Explanation:
CuS has an ionic bond between it as it it formed by the combination of two ions Cu⁺² and S⁻².
3(x - 2) = 5(x + 4)
Answer:
Uh first of all this is algebra but I'll answer this
First distribute the three and 5 (Multiply them by both terms inside parenthesis.
3x-6=5x+20
Then add like terms
8x=14
Divide 8 by 8 and 8 by 14
x = 14/8
Explanation:
Answer:
The answer is [tex]x = -13[/tex] .
Explanation:
Solve the equation:
[tex]3(x -2) = 5(x + 4)[/tex]
Use Distributive Property:
[tex]3(x -2) = 5(x + 4)[/tex]
[tex]3x - 6 = 5x + 20[/tex]
-Subtract [tex]5x[/tex] from [tex]3x[/tex] :
[tex]3x - 6 -5x = 5x -5x + 20[/tex]
[tex]-2x - 6 = 20[/tex]
-Add both sides by [tex]6[/tex] :
[tex]-2x - 6 + 6 = 20+6[/tex]
[tex]-2x = 26[/tex]
-Divide both sides by [tex]2[/tex] :
[tex]\frac{-2x}{-2} = \frac{26}{-2}[/tex]
[tex]x = -13[/tex]
So, now you have found the answer.
What is the definition of erosion? the process by which sediment settles out of water the soil and rocks deposited by moving water the process by which a river moves soil and rock the waterways that move soil and rock
Answer:
Sediment moves from one place to another through the process of erosion. Erosion is the removal and transportation of rock or soil. Erosion can move sediment through water, ice, or wind. Water can wash sediment, such as gravel or pebbles, down from a creek, into a river, and eventually to that river's delta.
Explanation:
Erosion refers to the washing away or the removal of top soils/rocks by agents such as water, wind, etc.
What is erosion?Erosion is the removal of topsoils or rocks by agents of erosions. These agents include water, wind, waves, and ice.
In water/ice erosion, topmost soils or rocks are washed away and deposited somewhere else, usually in or at the mouth of nearby water bodies.
Wind erosion carries soils/rocks and deposits them somewhere else. The deposition accumulates over a period of time to form different landforms.
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the attraction between two oppositely charged atoms or group of atoms is which type of bond
Answer:
ionic bond
An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.
which term describes clusters of light absorbing pigments?
Answer:
The correct answer would be D) chlorophylls.
Explanation:
Chlorophyll refers to the green pigment present in cyanobacteria and chloroplasts of plants and algae. It is the pigment which is able to absorb light which makes it an essential element for photosynthesis.
Ethan has a cupcake tray that holds 24 cupcakes. he has batter for one more cupcake. What limiting factor is this most closely relates to in the environment
Answer:
space
Explanation:
The limiting factor that the illustration closely relates to in the environment is space.
Limiting factors are environmental factors that hinder the population of living organisms living in that environment from reaching their maximum reproductive capacity, also known as biotic potential. Limiting factor include space, foods and other environmental resources such as sunlight, nutrients, etc.
In the illustration, the cupcake tray can only hold 24 cupcakes while Ethan has batter for 25 cupcake. The tray thus is limited in space and as a result, one cupcake batter is left floating. The has limited the production capacity of the cupcake batter.
Calculate the amount of heat gained when one 250 gram bottle is heated from 25oC to 30oC. The specific heat of water is 4.18 J/goC
Answer:
5230J
Explanation:
Mass (m) = 250g
Initial temperature (T1) = 25°C
Final temperature (T2) = 30°C
Specific heat capacity (c) = 4.184J/g°C
Heat energy (Q) = ?
Heat energy (Q) = Mc∇T
Q = heat energy
M = mass of the substance
C = specific heat capacity
∇T = change in temperature = T2 - T1
Q = 250 × 4.184 × (30 - 25)
Q = 1046 ×5
Q = 5230J
The heat energy required to raise the temperature of 250g of water from 25°C to 30°C is 5230J
Answer:
The amount of heat gained is 5225 J
Explanation:
The specific heat of a substance is the quantity or amount of heat required to change the temperature of a unit mass of the substance by 1[tex]^{0}C[/tex].
Thus,
Q = mcΔθ
where: Q is the quantity of heat required, m is the mass of the substance, c is the specific heat capacity of the substance and Δθ is the change in temperature of the substance.
From the question, given that: m = 250 g, initial temperature = 25[tex]^{0}C[/tex], final temperature = 30[tex]^{0}C[/tex] and specific heat of water = 4.18 J/g[tex]^{0}C[/tex].
So that; the quantity of heat, Q, required is;
Q = 250 × 4.18 × (30 - 25)
= 250 × 4.18 × 5
= 5225 Joules
⇒ Q = 5225 J
Therefore, the amount of heat gained is 5225 J.
how does a runoff get polluted.
Answer:
any litter on the ground can be swept up into the runoff. dirty ground water also commonly affects runoff since there are so many chemicals in the ground. farmers especially need to be cautious because teir fertilizers can leak into the ground.
Answer:
Water is polluted by runoff through the action of erosion: removal of surface material from Earth's crust, primarily soil and rock debris from the environment of which the water flows through.
Explanation:
When rain falls onto the earth, it just doesn't sit there, it starts moving according to the laws of gravity. A portion of the precipitation seeps into the ground to replenish Earth's groundwater. Most of it flows downhill as runoff. Runoff is extremely important in that not only does it keep rivers and lakes full of water, but it also changes the landscape by the action of erosion. Flowing water has tremendous power—it can move boulders and carve out canyons; check out the Grand Canyon!
Runoff of course occurs during storms, and much more water flows in rivers (and as runoff) during storms. For example, in 2001 during a major storm at Peachtree Creek in Atlanta, Georgia, the amount of water that flowed in the river in one day was 7 percent of all the streamflow for the year.
Examples
1. That part of the precipitation, snow melt, or irrigation water that appears in uncontrolled (not regulated by a dam upstream) surface streams, rivers, drains or sewers. Runoff may be classified according to speed of appearance after rainfall or melting snow as direct runoff or base runoff, and according to source as surface runoff, storm interflow, or groundwater runoff.
2. The sum of total discharges described in (1), above, during a specified period of time.
3. The depth to which a watershed (drainage area) would be covered if all of the runoff for a given period of time were uniformly distributed over it.
What is the most common ionic form of fluorine?
Answer: It will usually form the anion F- since it is extremely electronegative and a strong oxidizing agent. Fluorine is a Lewis acid in weak acid, which means that it accepts electrons when reacting. Fluorine has many isotopes, but the only stable one found in nature is F-19.
Explanation:
The most common ionic form of fluorine is the fluoride ion (F-). Fluorine, as an element, is highly electronegative, meaning it has a strong tendency to attract electrons towards itself.
In the process of forming an ion, fluorine gains one electron to achieve a stable electron configuration, resulting in the fluoride ion.
For example, when fluorine reacts with sodium (Na), fluorine gains one electron from sodium to form the fluoride ion (F-) while sodium loses one electron to become the sodium cation (Na+). This forms an ionic bond between the two ions, resulting in the compound sodium fluoride (NaF).
The fluoride ion is also commonly found in compounds such as calcium fluoride and aluminum fluoride . In these compounds, fluorine forms ionic bonds with other elements, resulting in the formation of stable compounds.
Overall, the fluoride ion is the most common ionic form of fluorine due to its high electronegativity and its ability to form stable compounds with other elements.
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Describe how to do a flame test on a sample of a salt
Answer:Hope this helps!
Explanation:
You can use a flame test to help identify the composition of a sample. The test is used to identify metal ions (and certain other ions) based on the characteristic emission spectrum of the elements. The test is performed by dipping a wire or wooden splint into a sample solution or coating it with the powdered metal salt. The color of a gas flame is observed as the sample is heated. If a wooden splint is used, it's necessary to wave the sample through the flame to avoid setting the wood on fire. The color of the flame is compared against the flame colors known to be associated with the metals.
If a compound contains an anion which is the conjugate base of a weak acid, the addition of hydronium ion solubility does what ?
Answer:
The addition of hydronium ion increases the solubility of the salt
Explanation:
When a weak acid, MA dissociates in an aqueous solution, the following products in equilibrium are obtained;
MA ----> M+ + A-
The anion which is a conjugate base will be removed from the solution with the addition of a hydronium ion from an acid: 2H3O+ + 2A- ----> 2HA + 2H20
This distorts the reaction equilibrium. According to Le Chatelier’s principle, more MA will dissolve until in order to restore the previous equilibrium of the reaction.
Therefore, an acidic pH increases the solubility of almost all sparingly soluble salts whose anion is the conjugate base of a weak acid.
How many molecules of oxygen enter your lungs when you inhale 5.0 mol of oxygen
Answer:
6x10^23
Explanation:
When you inhale 5.0 mol of oxygen, 3.0 × 10²⁴ molecules of oxygen enter your lungs.
We want to know how many molecules of oxygen are contained in 5.0 mol of oxygen.
Step 1: Determine the number of molecules of oxygen in 1 mole of oxygenThe number of molecules in 1 mole is a constant known as Avogadro's number.
What is Avogadro's number?Avogadro's number is the number of atoms or molecules in one mole of a substance, equal to 6.023 × 10²³.
Step 2: Calculate the number of molecules of oxygen in 5.0 mol of oxygen.5.0 mol × (6.023 × 10²³ molecules/1 mol) = 3.0 × 10²⁴ molecules
When you inhale 5.0 mol of oxygen, 3.0 × 10²⁴ molecules of oxygen enter your lungs.
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Which statement describes one characteristic of an operating electrolytic cell?
A. It produces electrical energy.
B. It requires an external energy source.
C. It uses radioactive nuclides.
D. It undergoes a spontaneous redox reaction.
Answer:
B
Explanation:
The mechanism of this process: the electrolytic cell converts the electrical energy to chemical energy, using external energy source.
The statement which describes one characteristic of an operating electrolytic cell is it requires an external energy source.
Hence, option (B) is correct answer.
What is Electrolytic Cell ?Electrolytic cell can be defined as an electrochemical device that requires an external source of electrical energy to facilitate a non-spontaneous redox reaction. It converts electrical energy in to chemical potential energy and this process is called electrolysis. In electrolytic cell anode is positive and cathode is negative.
What is Non-spontaneous redox reaction ?A nonspontaneous redox reaction occurs when an external voltage is applied. Electrolytic cell is non spontaneous redox reaction.
Thus, from above conclusion we can say that The statement which describes one characteristic of an operating electrolytic cell is it requires an external energy source.
Hence, option (B) is correct answer.
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Which element has atoms that can bond to each other in rings and networks?
Answer:
I believe its Carbon
what is the main cause for global wind patterns?
A) currents in the ocean affect the air above it
B) unequal heating of different parts of earth
C) differences in elevation on different landmasses
D) greenhouse gases
(no guessing please )
Calculate the volume of a gas with a pressure of 100 kPa, if its volume at 120 kPa is 1.50 L.
Answer:
120 kPa = 1.25 L
Explanation:
Because 120/1.50 is 80. And then if you divide 100 by 80, you get 1.25.
1 point
For the reaction below, 100 g of each reactant available. Which reactant is
the limiting reactant? *
2MnO2 (s) + 4KOH (am) + O2(g) + Cl2(g) → 2KMnO4 (am) + 2KCI (cm) + 2 H20 (1)
[Molar Masses: MnO2 =86.9 8/mol; KOH=56.18/mol; O2 = 32.0 /mol; Cl2 = 70.9 %/mol]
кон
Mn02
02
CI2
Answer:
K0H
I guessed and got it right.
The equation Mg(NO3)2(aq) + 2KOH(aq) --> Mg(OH)2 (s) + 2KNO3 (aq) is an example of which type of reaction? A) decomposition B) Acid/Base C) Precipitation
Answer:
C) Precipitation
Explanation:
Above reaction forms the precipitate of [tex] Mg(OH)_2[/tex](Magnesium Hydroxide). Hence, it is Precipitation reaction. This reaction is also known as Double displacement reaction.
Is peanut butter a renewable resources?
Answer:
Peanut oil is - a renewable resource. So I am not that sure about peanut butter
But since it is peanut oil, my best guess would be yes? It is.
Explanation:
Answer:
I think so... i mean penute oil is, so maybe penute butter is to
Explanation:
What are five things that gravity does
Answer:
1) It governs the motion of planets around the sun, holds galaxies together and determines the structure of the universe.
2) Gravity is by far the weakest force we know. Gravity only attracts – there’s no negative version of the force to push things apart. And while gravity is powerful enough to hold galaxies together, it is so weak that you overcome it every day. If you pick up a book, you’re counteracting the force of gravity from all of Earth.
3) Gravity and weight are not the same thing. Astronauts on the space station float, and sometimes we lazily say they are in zero gravity. But that’s not true. The force of gravity on an astronaut is about 90 percent of the force they would experience on Earth. However, astronauts are weightless, since weight is the force the ground (or a chair or a bed or whatever) exerts back on them on Earth.
4) Explaining the microscopic behavior of gravity has thrown researchers for a loop. The other three fundamental forces of nature are described by quantum theories at the smallest of scales – specifically, the Standard Model. However, we still don’t have a fully working quantum theory of gravity, though researchers are trying.
5) Gravity might be carried by massless particles called gravitons. In the Standard Model, particles interact with each other via other force-carrying particles. For example, the photon is the carrier of the electromagnetic force. The hypothetical particles for quantum gravity are gravitons, and we have some ideas of how they should work from general relativity. Like photons, gravitons are likely massless. If they had mass, experiments should have seen something — but it doesn’t rule out a ridiculously tiny mass.
The Law of Conservation of Mass states that if 6 grams react in a chemical reaction, then _____ grams are present after the reaction.
a. 9 grams
b. 12 grams
c. 3 grams
d. 6 grams
Why is 1-methylhexane not a legitimate name for a compound?
Answer:
It is not a legitimate chemical name because the methyl group on carbon 1 increases the length of the carbon chain to seven carbon atoms thus making the parent compound heptane
Explanation:
Chemical compounds are named according to rules in the IUPAC nomenclature.
In naming organic compounds, parts of rules is to find out the parent or root compound. This is determined by finding out the longest carbon chain and then checking if it contains single or multiple bonds. (that is if it is an alkane- with single bonds, alkene-with double bonds or an alkyne- with triple bonds)
From the question the parent or root name is an alkane containing 6 (Hex-) carbon atoms, while the methyl group is substituent
(CH₃)-CH₂-CH₂-CH₂-CH₂-CH-CH₃
However the alkyl substituent on carbon 1 increases the the length of the carbon chain to 7 (Hept-) instead of 6. Hence the correct IUPAC nomenclature is heptane and not 1-methylhexane.
Which of these is a disadvantage of using natural gas A It is not considered safe to use in homes. B Scientists have developed new ways of extracting it C It burns less cleanly than other fossil fuels D Extraction through fracking can contaminate groundwater
Answer:
A
Explanation:
Natural gas is flammable. A natural gas leak in a house can cause potential fires, and inhaling the gas can cause natural gas poisoning.
* Answer B: The fact that scientists have developed new ways of extracting natural gas - is an advantage, not a disadvantage.
* Answer C is wrong, because compared with some other fossil fuels, natural gas emits the least amount of carbon dioxide into the air when combusted -- making natural gas the cleanest burning fossil fuel of all.
* Answer D: the content of the statement is about the production process, not about using of natural gas.
....
Hope this answer can help you. Have a nice day!
Answer:
Explanation:D Extraction through fracking can contaminate groundwater
Match these questions with the right letter answer choice
1. Large loops of gases
2. Occurs when the layer of our atmosphere are energized
3. An electrically charged mixture of electrons and protons
4. Sunspot regions suddenly connect releasing large amounts of heat and energy
5. When the solar wind affects Earth's upper atmosphere
A. Magnetic Storms
B. Prominence
C. Auroras
D. Solar Flare
E. Solar Wind
Answer:
1, B. 2, E. 3, D. 4, A. 5, C.
Explanation:
The reason why 1 and B match is because large loops of gas makes prominence by the kind of gas they use. This means that whatever kinds of loops they make, this makes this prominence and this concludes that the loops shapes and forms this kind of shape.
The reason why 2 and E match is because Solar Wind does occur, and this happens when our galaxy and atmosphere are energized, meaning that the specific layer was included with these two and Solar Wind. This was made from these two materials which created Solar Wind.
The reason why 3 and D match is because electrically means with wires, and it is a bit digital. Flare can somewhat mean "fast". This means that when they say that it is charged, meaning fast.There are similar meanings.
The reason why 4 and A match is because Magnetic Storms is because storms are part of the weather and by sunspot regions, this also means that this is part of weather, so both of these have to do with weather. This also has to do with sunspot regions because it is large amounts of heat and energy, meaning that this is strong weather just like magnets and storms.
The reason why 5 and C match is because Auroras are part of Solar Wind. This is not the answer Solar Wind because they wouldn't give away the answer in a question. This also means that Auroras is the answer because it affects the upper atmosphere of Earth. This means that they are Auroras since they include Solar Wind but it does not mean that it is Solar Wind, so the answer is Auroras.
Water was added to 175 mL of a KOH solution until the volume was 250 mL and the molarity was 0.315 M. What was the molarity of the initial concentrated solution?
Answer: The molarity of the initial concentrated solution is 0.450 M
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = Molarity of concentrated KOH solution = ?
[tex]V_1[/tex] = volume of concentrated KOH solution = 175 ml
[tex]C_2[/tex] = concentration of diluted KOH solution= 0.315 M
[tex]V_2[/tex] = volume of diluted KOH solution= 250 ml
Putting in the values, we get:
[tex]M_1\times 175=0.315\times 250[/tex]
[tex]M_1=0.450M[/tex]
Thus the molarity of the initial concentrated solution is 0.450 M
What are four unusual properties of water that are a direct result of hydrogen bonding
Answer:
The following are the four unusual characteristics of water due to hydrogen bonding:
1. Water exhibits high specific heat as the presence of hydrogen bonds enhances the concentration of energy needed for the molecules to accelerate the speed, thus, elevating the specific heat.
2. Water has both high melting and high boiling points as hydrogen bonds enhance the energy, which is needed at the time of phase change, thus, increasing both the melting and the boiling points.
3. The hydrogen bonds present in the water gives rise to robust intermolecular attractions, therefore, enhancing the surface tension.
4. The hydrogen bonds present in the water makes the water to exhibit high heat of vaporization, that is, of about 41 KJ/mol.
Answer:
High boiling and melting points: Hydrogen bonds increase the amount of energy required for phase changes to occur, thereby raising the boiling and melting points.
High specific heat: Hydrogen bonds increase the amount of energy required for molecules to increase in speed, thereby raising the specific heat.
Lower density as a solid than as a liquid: Hydrogen bonds increase the volume of the solid by holding molecules apart, thereby decreasing the density.
High surface tension: Hydrogen bonds produce strong intermolecular attractions, which increase surface tension.
state two differences between metals and non metals with respect to their
1 physical properties
2 chemical properties
Answer:
Physical Properties
1. Metals are shiny but most non - metals lack this property.
2. Metals are able to deform under compression (malleable) but most non - metals lack this property.
Chemical Properties
1. Metals are good conductorsof heat and electricity but most non - metals are insulators.
2. Metals, when exposed to water atmospheric oxygen tend to rust but non - metals lack this chemical property
Each nucleus of a cell contains:
genes and chromosomes
genes and chloroplasts
chromosomes and chloroplasts
chlorophyll and chloroplasts
Hi there!
Answer:
Genes and chromosomes
Explanation:
All cells contain Genetic information (or Dna) which is organised into structures called chromosomes.
Chlorophyll are basically green pigments in Chloroplasts and both are only found in plant cells and not all cells
Answer:
a
Explanation:
A scuba tank contains a mixture of oxygen (O2) and nitrogen (N2) gas. The oxygen has a partial pressure of PO2=5.62MPa. The total gas pressure is 26.78 MPa. What is the partial pressure of nitrogen gas in the tank?
Answer:
21.16 MPa
Explanation:
Partial pressure of oxygen = 5.62 MPa
Total gas pressure = 26.78 MPa
But
Total pressure of the gas= sum of partial pressures of all the constituent gases in the system.
This implies that;
Total pressure of the system = partial pressure of nitrogen + partial pressure of oxygen
Hence partial pressure of nitrogen=
Total pressure of the system - partial pressure of oxygen
Therefore;
Partial pressure of nitrogen= 26.78 - 5.62
Partial pressure of nitrogen = 21.16 MPa
Answer:
The partial pressure of Nitrogen gas in the tank = 21.16 MPa.
Explanation:
According to Dalton's Law of partial pressure for gases, the total pressure of a mixture of gas under unchanging conditions is a sum of the partial pressures of each of the individual constituent gas.
The mixture consists of Nitrogen and oxygen gas. Hence, mathematically,
Total Pressure of the mixture = (Partial Pressure of Oxygen gas) + (Partial Pressure of Nitrogen gas)
Total Pressure of the mixture = 26.78 MPa.
Partial Pressure of Oxygen gas = 5.62 MPa.
Partial Pressure of Nitrogen gas = ?
26.78 = 5.62 + (Partial Pressure of Nitrogen gas)
Partial Pressure of Nitrogen gas = 26.78 - 5.62 = 21.16 MPa.
Hope this Helps!!!