How many moles are present in 1.39 grams of carbon?
Answers
Answer:
0.116 moles
Explanation:
To go from grams to moles, you take the given mass (1.39g) and divide it by the molar mass (which is about 12 grams for Carbon). This gives you the moles. I have attached my work below.
Hope this helps! :^)
Related Questions
As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato.
Why did the iodine solution change color on the potato?
A.
The iodine burned the potato and turned it to ash.
B.
The iodine mixed with the colors of the potato so it looked black.
C.
The iodine evaporated into a gas.
D.
The iodine reacted with the potato to form a new substance.
Answers
Answer:
d, the idiodine reacted
if we change the pH of a substance is this a physical change chemical change or both?
Answers
Answer:
chemical change
ExplanationC:
moles
Calculate the number of moles of 3.00 g of boron tribromide,
Answers
mol = mass/mr
mol=3/10.811+3(79.904)
= 0.018772527032439
Help me please, I don't get it. Please & thank you, xoxo !
Answers
Sorry I accidentally touched it
which type of spectra would be produced by a hydrogen lamp?
Answers
Answer: Emission spectra
The Emission spectrum can be separated into three types:
Line emission spectrum Continuous emission spectra.Band emission spectrumWhat is a Hydrogen lamp?
A gas of hydrogen atoms will create an absorption line spectrum if it is between you (telescope+spectrograph) and a continuum light source, and also an emission line spectrum if considered from a distinguishable angle.
When The emission spectrum of atomic hydrogen has been divided into several spectral sequences, with wavelengths given by the Rydberg formula.
These experimental spectral lines are due to the electron-making transitions between two energy positions in an atom.
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Convert 1.56x10^30 particles of sodium chloride to grams of sodium chloride
Answers
Answer:
I cannot tell yet
Explanation:
I don't take that class yet but ill get back to you
PLEASE HELP
If an atom has a negative charge, it has ___ protons than electrons.
A) More
B) Less
C) The same amount
Answers
As if the atom has more electrons than protons it is negatively charged
Answer:
less
Explanation:
An electron has a charge of -1 so if there are more electrons than protons the overall charge of the atom is going to be negative
can someone help me with this
Answers
Answer: 5. Positive
6. Negative
9. Oxygen carbon hydrogen nitrogen
Explanation:
When you bend, stretch, or compress an object from its natural shape, it stores
Question 3 options:
Gravitational potential energy
Kinetic energy
Chemical energy
Elastic potential energy
Answers
Answer: The answer is elastic potential energy
Explanation: Potential energy is stored energy if something is elastic that means the shape or form of an object is being compressed from its original form. Like elastic girl from the incredibles lol. but anyways if you compare somehting to a rubber band it has elastic potential energy Thus the answer is D.
Hope this helps :).
When you bend, stretch, or compress an object from its natural shape, it stores Elastic potential energy.
What is elastic potential energy ?Elastic energy is the mechanical potential energy held in a material's or a physical system's configuration as it is subjected to elastic deformation as a result of work being done on it. Elastic energy is created when objects are momentarily crushed, stretched, or otherwise deformed.
Because it is stored in the bonds between atoms of an object or substance when it is momentarily stressed, elastic energy is a type of potential energy. The object may have been stretched or compressed, causing this stress.
An object's shape may change as a result of a force operating on it. If stretched or compressed, elastic things can store elastic potential energy. This occurs, for instance, when a spring is stretched or a catapult is utilized.
Thus, option D is correct.
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Someone help me with this pls
Answers
A system which allows both mass and energy to flow into the surroundings is called
Answers
Answer:
An open system can exchange both energy and matter with its surroundings. The stovetop example would be an open system, because heat and water vapor can be lost to the air.
Explanation:
what is negative in food sterilization?
Answers
Answer:
Thermal food sterilization and pasteurization are the most widespread preservation technologies to extend food shelf life by inactivating microorganisms and enzymes that can deteriorate foodstuffs.
Explanation:
The process requires constant attention.
The equipment that it requires are costly.
Keeping moisture in food is difficult because of low moisture contents in the machine.
What is the pH of a 0.02 M HCl solution?
O A
1.7
B.
2.0
3.7
O
D.
4.0
Answers
Answer:
2 is answer of this question
what is the solute when stirring salt in water until the salt disappears?
Answers
Answer:
The solute is the substance being dissolved.
The solvent is the substance dissolving the solute.
Therefore, the salt is the solute and the water is the solvent.
Explanation:
The salt is the solute.
How do you produce a buffer.
Answers
Answer:
Buffers can be made from weak acids or base and their salts.
Explanation:
hope this helps!
(if not tell me in the comments and i will try to help you!)
Answer:
Buffers are made by adding a strong acid or base to a weak acid or base.
Explanation:
What electrolyte may fall in level as a result of citrate toxicity from massive transfusion quizlket
Answers
a. How many protons?
b. How many neutrons?
c. What is the name of this atom?
PLS HELP ILL GIVE BRAINLIEST
Answers
b)For neutron,the formula is given by A=Z+N where A is the mass no=32 and Z is atomic no=16 and N is the neutron no=? So to find N , A-Z=N so 32-16 so neutron is 16
c)sulphur
For accurate answer i will mark you a brainlist:D
How will you convert 85 cm to 85 m, choose one of the following option:
( Remember there is a decimal in 85 after 5)
Question 12 options:
Move the decimal in 85 TWO places to the right to decrease the value.
Move the decimal in 85 THREE places to the right to increase the value.
Move the decimal in 85 TWO places to the Left to decrease the value.
Move the decimal in 85 THREE places to the Left to decrease the value.
Answers
Answer:
welp it would be this option : Move the decimal in 85 TWO places to the right to decrease the value.
Explanation:
Answer:
Option A
Explanation:
Moving the decimal point 2 places to the right will give you 8500 cm=85m
When light waves pass through solids, the speed of the wave ___________.
remains the same
decreases
increases
Answers
It woukd decrease.
I am sure its correct you can trust me becuase I took the test.
Answer:
The speed of the wave decreases.
Explanation:
When light waves do pass through a medium, any solid, liquid, or gas, the speed of the waves actually decreases. Solids are more dense than liquids, so they decrease the speed of light even more.
(I did the quiz btw!!)
PLEASE HELP WILL MARK BRAINLIEST
Answers
Answer:
the answer is 150 in centimeters
If pOH of the compound equals to 2, it shows that compound is *
Strong basic
Strong acidic
Weak acidic
Weak basic
Answers
i need help!!!!! limited time! please Explain the energy transformation that occurs when food is digested.
Chemical energy transforms into mechanical energy.
Electrical energy transforms into mechanical energy.
Mechanical energy transforms into chemical energy.
Thermal energy transforms into electrical energy. I RLLY NEED HELP pls
Answers
Answer:
thermal energy
Explanation:
please mark me as brainlists
In the two-substance mixtures you have investigated so far, are there any situations where there is more than one correct answer? Explain.
this is on gizmo i don't understand it
Answers
Answer:
yourmom.com
Explanation:
Ask your mom!!!!!!!
The fuel used in many disposable lighters is liquid butane, c4h10. Butane has a molecular weight of 58. 1 grams in one mole. How many carbon atoms are in 3. 50 g of butane.
Answers
Answer:The first thing you need to do is calculate the molar mass of C4H10.
Explanation:
Which ingredients are needed to transform nadp to nadph?.
Answers
Answer:
according to online:
"Hydrogen ions are transported with the electrons along the chain of reactions. In photosystem I, the electrons are energized, and the energy is stored in molecules of NADP+. During these reactions, the NADP+ molecules are reduced by the addition of electrons. A hydrogen ion is added to NADP+ to form NADPH."
Explanation:
hope this helps!! :)
True of False: The 8-Step Problem Solving Process was developed as an intended expansion of OODA Loop.
Answers
The 8-Step Problem Solving Process is vital to solving problems in an organized way and it's an extended form of OODA Loop. Therefore, it's logically true.
The 8-Step Problem Solving Process include the following:
Defining the problem.Clarifying the problem.Defining the goals.Identification of the root cause of the problem.Development of an action plan.Executing action plan.Evaluating the results.Continuous improvement.It should be noted that the 8-Step Problem Solving Process was developed as an intended expansion of the OODA Loop. Therefore, the statement is true.
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how is the miscibility of two liquids related to their polarity?
Answers
Answer:
The more polar the liquid, the more likely that it is miscible with water. The polarity of a liquid does not affect its miscibility with water. The less polar the liquid, the more likely that it is miscible with water. The more polar the liquid, the less likely that it is miscible with water.
Explanation:
hope it helps you
Miscibility of two liquids are directly related to their polarity. The likelihood that a liquid will mix with water increases with its polarity.
What is polarity?Polarity is the arrangement of electrical charge among the atoms connected by a chemical bond. Because both hydrogen atoms in H2 were electrically neutral, bonds among atoms of different elements were electrically inequivalent, as opposed to bonds among identical atoms, which are electrically uniform.
The likelihood that a liquid will mix with water increases with its polarity. Liquid miscibility with water is unaffected by the polarity of the liquid. The likelihood that a liquid will mix with water increases with decreasing polarity. The likelihood that a liquid will be miscible with water decreases with increasing polarity.
Therefore, miscibility and polarity are directly related.
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asap help for brainlist
Which pair of atoms will form a covalent bond?
Question 7 options:
H and O
Li and I
K and Fl
Na and Cl
Answers
Answer:
h and o
Explanation:
because both are non metals
life as we know it could not exist without water. All the chemical reactions of life occur in an aqueous solution. Water molecules are polar and are capable of forming hydrogen bonds with other polar or charged molecules. As a result, water has the following properties:
A. H2O molecules are cohesive; they form hydrogen bonds with each other.
B. H2O molecules are adhesive; they form hydrogen bonds with polar surfaces.
C. Water is a liquid at normal physiological (or body) temperatures.
D. Water has a high specific heat.
E. Water has a high heat of vaporization (energy needed to evaporate)
F. Water's greatest density occurs at 4°C
Answers
The water has the following properties H2O molecules are adhesive; they form hydrogen bonds with polar surfaces and Water is a liquid at normal physiological (or body) temperatures because of polarization.
What is polarization?The polarization is a property by which a chemical compound shows the dipole into its nature as one element can attract the electron and attends the partial negative charge and other is electron donating and attends the partial positive charge.
In water molecule it have the tendency to accept the electron because of oxygen electronegativity and can form the bond with hydrogen too as hydrogen donates the electron and behaves as adhesive molecule.
Therefore, H2O molecules are adhesive; they form hydrogen bonds with polar surfaces and Water is a liquid at normal physiological (or body) temperatures because of polarization are the properties of water.
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A fusion reaction always creates which of the following?
a A massive amount of energy.
b A massive amount of heat.
C A more massive atomic nucleus.
d A massive number of smaller nuclei.
Answers
A fusion reaction can be regarded as the type of reaction that occurs where two lighter elements come together in a type of reaction giving rise to a heavier/more massive element.
A fusion reaction always creates a more massive atomic nucleus (option c).
When the two lighter nuclei comes together in a reaction, a more heavier/massive nucleus is formed but its mass will still be less than the combined mass of the two reactant nuclei.
This also indicates that the left over mass may have been released as energy.
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