Answer:
includes the coefficients that are needed for balancing the equation.
Explanation:
A chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.Hence, Option (C) is Correct.
What is Balanced Equation ?
An equation that has an equal number of atoms of each element on both sides of the equation is called a balanced chemical equation, i.e., the mass of the reactants is equal to the mass of the products.
Therefore, A chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.Hence, Option (C) is Correct.
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Please help with my chemistry homework! : Fuel burns in a car engine. Describe how oxides of nitrogen are produced in a car engine. I stated: -very high temperatures in the car engine create a reaction of oxygen and nitrogen. But I'm unsure if this is correct and would award me the full 2 marks?
Answer:
Your statement is right.
Explanation:
When fuels are burned in vehicle engines, high temperatures are produced. At this high temperature, nitrogen and oxygen from the air combine with each other to produce nitrogen monoxide (NO). When this nitrogen monoxide is released in the air from vehicle exhaust systems, it combines with oxygen present in the air to form nitrogen dioxide (NO2).
What is the molar mass of cryolite
Answer:
wt= 3(23)+27+6(18.9)
=69+27+113.94
Explanation:
=209.94 grams
Answer:
209.9 g mol
Explanation:
Notes: Thermal Energy
Instructions
Read the webpage on Thermal Energy
Watch the video at the end of the notes
Upload your answers to the Review Questions at the end of the page in one of the following formats:
a PDF of your typed answers
a photo of your handwritten answers
Answer:
There is nothing attached..
Explanation:
Answer:
there is nothinig to add
Explanation:
The boiling point of water is 1000C.
(a) Once boiling starts, why does the temperature not rise accordingly even heat is supplied? (b) Steam causes more severe burns than boiled water at the same temperature. Why?.
Answer:
a) The heat which we supply to water during boiling is used to overcome these forces of attraction between the particles so that they become totally free and change into a gas. This latent heat does not increase the kinetic energy of water particles and hence no rise in temperature takes place during the boiling of water.
b) Steam produces more severe burns than boiling water even though both are at 100oC because steam contains more heat, in the form of latent heat, than boiling water.
Explanation:
i hope this will help u
Which statement best compares bacteria and fungi?
O Most bacteria and fungi are harmless and may be beneficial to other
living things.
Bacteria are living organisms, whereas, fungi are not.
Bacteria and fungi always cause infectious diseases.
Both bacteria and fungi rely on living organisms to reproduce and survive.
Answer:
Both bacteria and fungi rely on living organisms to reproduce and survive.
Most bacteria and fungi are harmless and may be beneficial to other
living things. So, the correct option is (A).
What are Bacteria and Fungi?Bacteria and fungi are two types of organisms that belong to different class of organisms while they are prokaryotic and eukaryotic in nature respectively. They are present in various life forms like parasitic (bacteria), saprophytic (fungi) etc. They are harmless in nature and can be beneficial to other living things as well.
They have mutual relationships with other living organisms, which are beneficial to both.
For example, some species of bacteria help fix nitrogen in the root nodules of leguminous plants, while fungi form a mutualistic relationship with algae called lichens where they benefit each other in one way or another.
Thus, most bacteria and fungi are harmless and may be beneficial to other living things. So, the correct option is (A).
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What of the following are found in the nucleus of an atom? A=neutrons an elements B=neutrons and protons C=electrons and protons D=protons and electrons
If block 1 were broken in two equal pieces, what would be the density of each piece? Why?
Explanation:
The density of the new blocks will be the density of the original block.
For example if the density of the block is 2g/cm³, when the block is broken down into two, each of the new block will have a density of 2g/cm³.
Density is an intensive property of matter. It does not depend on the mass of the substance available. Every sample of a substance have the same value of density.The primary energy source in the United States is:
solar energy
nuclear power
fossil fuel
hydroelectric power
will give brainliest
Answer:
Fossil fuels i believe
Explanation:
Answer:
fossil fuel
Explanation:
got it right on ow
Genetic diversity is important because the more genes are in a population , the more likely that one of those genes will prove ______ in the face of threats such as climate change or a new disease.
Answer:
higher endurance & adaptability
Explanation:
Genetic Diversity is diversity within species, community.
Genetic Diversity is important as higher genetic variations in population imply that - some or all of their genes have will prove to have higher endurance & adaptability in case of environment aspect (like climate) change or any adversity (new disease).
Which one is correct?
Answer:
The answer is a
Explanation:
If you are following the recipe for a cake, how will the order in which you add the ingredients affect the mass of the batter? (1 point)
A. It will have no effect because the order in which ingredients are mixed will not change the fact that matter cannot be created nor destroyed.
B. If you add the liquid ingredients first, the final result will have less mass than if you added the dry ingredients first. This is because the dry ingredients will dissolve in the liquid ingredients.
C. If you add the dry ingredients first, the final result will have less mass than if you added the liquid ingredients first. This is because the dry ingredients will be dissolved by the liquid ingredients.
D. It will have no effect because heating an object never produces a chemical change and only chemical changes can create or destroy mass.
In cake, the ingredients have been changed to the baked cake, so the order of putting the ingredients has no effect on the mass of matter. Thus, option A is correct.
The baking of cake has been corresponds with the addition of the ingredients, thereby process mixing in order to create the reactant mixture that has been heated at the specific temperature for a specified time period. The resultant has been the baked cake matter.
The reagents and products all are matter, and baking has been the chemical reaction. According to the law of conservation of mass, matter cannot be created nor be destroyed in a chemical reaction; it can be changed from one form to another.
In cake, the ingredients have been changed to the baked cake, so the order of putting the ingredients has no effect on the mass of matter. Thus, option A is correct.
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Which of the following are properties of ionic compounds (choose all that apply) Form crystals Form crystals Dissolve in water Dissolve in water High melting point and boiling point High melting point and boiling point Poor conductors of electricity Poor conductors of electricity Hard Hard Soft Soft
BRAINLIEST IF RIGHTLet’s imagine now that you are in a spaceship in outer space, far from any stars or planets, where there is no air. If you fire the rocket engine, an unbalanced force is created that propels your spaceship forward.
What will happen when you turn off the rocket engine?
Group of answer choices
The rocket's velocity will decrease over time and distance.
The rocket will stop immediately.
The rocket will continue to travel at a constant velocity.
The rocket's velocity will increase with time and distance.
Answer: b
Explanation:
Answer:
C
Explanation:
Obviously, as there is no air to create friction or any opposing force against the rocket; and there is no force accelerating it.
The rocket will maintain its velocity
Which is more reactive, calcium or potassium ?
Answer:
the answer is potassium
Explanation:
Potassium has only one valence electron. ... Whereas, calcium has two valence electrons, so it requires more energy for the removal of a valence electron. Due to this potassium is more reactive than calcium.
Bye Have A Great Day! =)
Energy Transfer is the Blank from one object to another object.
Answer:
Process
Explanation:
Energy transfer is the process from one object to another object
Energy transfer is the transfer of energy from one object to another object.
Energy can be defined as the ability (capacity) to do work. Hence, the only standard unit of measurement of energy is Joules (J).
Generally, there are different forms of energy and these include;
Heat (thermal) energy.Light energy.Sound energy.Wind energy.Energy transfer is a process which refers to the transfer of energy from an object or physical body to another.
According to the Law of Conservation of Energy, energy can neither be created nor destroyed but it can only be converted (transformed) from one form to another such as kinetic energy to potential energy.
For example, a jug of hot tea has heat (thermal) energy, which is added to the particles in a cold powdered milk to make the coffee hotter.
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Use the periodic table to write the electron configuration of selenium (Se).
Answer:
1s^22s^22p^63s^23p^64s^23d^104p^4
Answer:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 p4
Explanation:
PLATO correct
True or False: Quantitative data is about a description or observation and qualitative data is about measurements and numbers. Please help in under 20 min,
Answer:
False
Explanation:
Quantitative data is measured using numbers and Qualitative data is descriptive
what is a solvent using your own words
Answer:
a substance that dissolves another to form a solution: Water is a solvent for sugar.
Answer:
a liquid that you can add to dissolved other materials
Explanation:
What is the total number of Joules lost when 10. grams of water at 80.°C is cooled to 60.°C?
Answer:
The total number of Joules lost to the surrounding is -837.2 J
Explanation:
Given that:
mass = 10 grams
initial temperature = 80°C
Final temperature = 60 °C
Specific heat of water= c = 4.186 J/g. °C
The total number of Joules lost can be determined by finding the amount of heat energy Q released by using the formula:
Q = mC ΔT
Q = 10 × 4.186 × (60 - 80)° C
Q = 10 × 4.186 × - 20° C
Q = -837.2 J
Thus, the total number of Joules lost to the surrounding is -837.2 J
The correct name for the molecule IgBr7 is:
Answer:
(iodine?) heptabromide
Explanation:
Not sure what element Ig is but use that name and then heptabromide.
At a pressure of 710 atm, gas has an unknown volume. When the pressure is decreased
to 0.96 atm, the volume is 3700 mL. What was the original volume of the gas?
Answer:
5.00 mLExplanation:
The original volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the original volume
[tex]V_1 = \frac{P_2V_2}{P_1} \\[/tex]
From the question we have
[tex]V_1 = \frac{3700 \times 0.96}{710} = \frac{3552}{710} \\ = 5.002816...[/tex]
We have the final answer as
5.00 mLHope this helps you
Lucien drove for 24 straight hours going 960 KM. What was his average speed?
Answer:
40 KM an hour.
Explanation:
Answer:
40 KM an hour.
Explanation:
Which of the following has the smaller electronegativity?
A. Lithium
B. Beryllium
C. Sodium
Answer:
i think it c
Explanation:
Why might a metallic compound be mistaken for an ionic compound, based on its physical properties?
A. Both metallic and ionic compounds form brittle crystal lattice structures. Thus, they are unable to absorb energy and cannot form new shapes.
B. Both metallic and ionic compounds are composed of metal atoms in a bond. However, only ionic compounds show extreme luster.
C. Both metallic and ionic compounds form ductile compounds. Thus, they are able to be reshaped without breaking the bond of the compound.
D. Both metallic and ionic compounds can conduct electricity when molten. However, only metallic compounds can conduct electricity in a solid state.
Answer:
(D). Both metallic and ionic compounds can conduct electricity when molten. However, only metallic compounds can conduct electricity in a solid state.
Explanation:
Metallic compound have the ability to conduct electricity. Since they are Metals they have loosely held electrons which can contribute to electricity conduction.
Ionic compound are brittle physically, ionic compound cannot conduct electricity while being in solid state as the ions are held strongly by electrostatic force of attraction, they can only conduct electricity while they are in molten or aqueous state. In molten state they are forming ions, and ions are free to move within the solution and therefore contribute to electricity conduction.
Just need help with these two questions
Through what process do humans and animals get the energy they need?
A. photosynthesis
B. cellular respiration
C. heat energy
D. hydrolysis
Answer:
C heat energy
Explanation:
Help plz:))) I’ll mark u brainliest
Element in group 1 that is NOT classified as a metal.
Answer:
i think it is hydrogen
Explanation:
Answer:
They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Which property do acids and bases share
Answer:
: A property that is shared by bases and acids is the ability to conduct electricity when dissolved in water. Some ways bases and acids are different is that acids taste sour whereas bases taste bitter. Also, acids but not bases react with metals.
Explanation: Trust me on this
Which sample of matter is a pure substance?
Answer:
salt, sugar, ect.
Explanation:
A pure substance is a material that has a constant composition. It has consistent properties throughout the sample. A pure substance helps in a chemical reaction to form predictable products. In chemistry, a pure substance consists of only one type of atom , molecule, or compound.
Please help!!!
Which statement best defines the relationship between work and energy?
O Work can transfer energy between objects and increase radiant energy.
Work can transfer energy between objects and cause a change in the form of energy.
Work can transfer energy between objects and decrease nuclear energy.
O Work can transfer energy between objects and cause a change in the amount of total energy.
Answer:
Its B
Explanation:
I just did the test on edge.
Answer: its B
Explanation:I need points.