If each side of the equation has the same number of atoms of a given element, that element is balanced. If all elements are balanced, the equation is balanced. So your sentence should look like this:
A chemical equation is balanced if there are equal atoms of each kind of element on both sides of the equation.
what are 2 physical changes in the carbon cycle?
Answer:
Today, the carbon cycle is changing. humans are moving more carbon into the atmosphere from other part of the earth system. more carbon is moving to the atmosphere where fossil fuels, like coal and oil, are burned.more carbon is moving to the atmosphere as you may get rid of forest by burning the tree
Explanation:
hope this give you a hint
The Periodic Table of elements is arranged by:
O atomic mass
O number of neutrons
O number of electrons
O atomic number
Answer:
atomic number
Explanation:
Answer:
number of electrons and number of neutrons
235/92 U + 1/0 n -> 138/55 Cs + 96/37 Rb + 2 1/0 n
what kind of reaction?
Answer:
Nuclear fission
Explanation:
This reaction is called a nuclear fission reaction. In this reaction, a radioactive decay process occurs in which a heavy nucleus spontaneously disintegrates into two lighter nuclei and several neutrons, with the release of a large amount of energy.
The imbalance between the number of neutrons and protons is responsible for this spontaneous disintegration. Until a stable daughter cell forms, the reaction proceeds.What does it mean for an element to be oxidized?
A. The element is a spectator ion in a chemical reaction.
B. The element has gained one or more electrons in a reaction.
C. The element has lost one or more electrons in a reaction.
D. The element has bonded to another element with opposite charge
Answer:
B
Explanation:
Oxidation occurs when an atom molecule or ion loses one or more electrons in a chemical reaction when oxidation occurs the oxidation state of the chemical species increases oxidation doesn't necessarily involve oxygen originally the term was used when oxygen caused electron loss in a reaction hope this helped. :)
An element is oxidized when It has loses one or more electrons in a chemical reaction. Therefore, Option (C) is correct.
What is Oxidation ?The loss of electrons, gain of oxygen or loss of hydrogen will be considered as Oxidation.
The gain of electrons, loss of oxygen or gain or hydrogen will be considered as the Reduction.
Rusting is one of the popular example of oxidation.
Therefore, An element is said to be oxidized when It has lost one or more electrons in a reaction.
Hence , Option (C) is correct.
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help :(
If 4.7 moles of oxygen gas are allowed to react with 3.9 moles of iron according to the following equation:
4 Fe + 3 O2 → 2 Fe2O
How many moles of Fe2O3 can be formed?
Moles of Fe₂O₃ formed : 1.95
Further explanationA reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
[tex]\tt 4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]
We find the limiting reactant from the ratio of the mole and the reaction coefficient
Fe ⇒ 3.9 : 4 = 0.975
O ⇒ 4.7 : 3 = 1.56
Because the ratio of Fe is smaller, then Fe becomes the limiting reactant
Reaction
4Fe + 3O₂ ⇒ 2Fe₂O₃
mol Fe₂O₃ from mol of Fe as limiting reactant
mol ratio Fe₂O₃ : Fe = 2 : 4, then mol Fe₂O₃ :
[tex]\tt =\dfrac{2}{4}\times 3.9=\boxed{\bold{1.95}}[/tex]
How much does a sample of C6H12O6 weigh if it contains 1.7 x 10^28 hydrogen atoms?
Answer:
Explanation:
Glucose has 6 number of carbon atoms, 12 atoms of oxygen and 6 atoms of oxygen
The total number of glucose atom is 24 atoms
The atom of hydrogen is twice that of carbon
that is (6.02 x10^22) x2=1.204 x10^23atoms
the number of moles of hydrogen is solved as follows
1mole = 6.02x10^23 atoms what about 1.204 x10^23=
{(1.204x10^23)/(6.02 x10^23)}=0.2moles
The moles of glucose
1 atom of glucose= 6.02 x10^22 x4 =2.408 x10^23 atoms
moles= { (2.48 x10^23)/(6.02 x10^23)}=0.41moles
Hope this helped :)
PLEASE I NEED HELP ASAP.
Al = 13 protons, 10 electrons, 14 neutrons
S = 16 protons, 18 electrons, 17 neutrons
P = 15 protons, 18 electrons, 19 neutrons
Hope this helped!
Heat rising in a hot-air balloon is an example of __________. conduction convection radiation solar
Answer:Condensation
Explanation:
it
Answer:
convection
Explanation:
I took test I got 100%
what are the spectrum lines, and they're color emmited and nanometers
Emission lines are seen as coloured lines on a black background. Absorption lines are seen as black lines on a coloured background. The presence of spectral lines is explained by quantum mechanics in terms of the energy levels of atoms, ions and molecules.
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A force is always a push. true or false ?
A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.
Experimental Group:
Control Group:
PLEASE HELP WILL GIVE BRAINLIEST
If a football is 625 mL volume and 0.64 g/mL density what is the mass
what is the orbital notation for silver?
Answer:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d10
Explanation:
I think
i'll mark brainliest if you can answer this quick and correctly only correct cause i don't accept bad answers or i'll report you if i get a bad grade
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The mass of an object is 24g and the volume of the object is 16 mL. Calculate the
density of the object?
Answer:
D = m/v
Explanation:
So m = 24g and v = 16mL. (I assume these are the units being used). Then, we get D = 24g/16mL which is 1.5 g/mL
What is the term used to describe a change in motion?
Answer:
it should be momentum if im not mistaken
Which contribution is a modification to Thomson's plum pudding model?
Atoms are indivisible.
Electrons are scattered in an atom.
A positively charged nucleus sits at the center of an atom.
Atoms of the same element have the same properties.
Answer:
Option C: A positively charged nucleus sits at the center of an atom.
Explanation:
Thompson’s plum pudding model was a model proposed by Thompson to show that an atom consisted of more than one fundamental unit.
In Thompson's model, he suggested that the atom consisted of a cloud of positive charges which were surrounded by electrons which are negative charges distributed throughout.
Now, Thompson's experiment was later rejected by Ernest Rutherford when he carried out the gold foil experiment and came to the conclusion where he proposed a model that the atom consisted of mainly empty space and that all its positive charge are concentrated at its center and further surrounded by a cloud of electrons.
From the given options, the correct one is Option C.
Answer: Option C: A positively charged nucleus sits at the center of an atom.
Explanation:
how is iodine 131 different from a normal atom of iodine?
Answer:
Iodine 131 is an unstable/radioactive isotope of iodine and a normal atom of iodine is stable.
Explanation:
When bonding, what is most likely to happen between the atoms listed below?
A.) Atom X will donate electrons to Atom Y
B.) Atom X will accept electrons from Atom Y
C.) Atom Y will accept electrons from Atom Z
D.) Atom Z will donate electrons to Atom X
Answer:
atom x will accept electrons from atom y
Explanation:
in bonding the main purpose is to gain stable electronic configuration hence atom y will give out the two valence electrons to atom x
this kind of bonding where one of the atom is the one donating the electrons is known as ionic bond.
The formula for density (D) is D = m/v, where m is mass and v is volume. What is the mass in grams (g) of a 45.0 cubic centimeters (cm³) block of silicon if the density of silicon is 2.336 grams per cubic centimeters (g/cm³)
A. the mass is 0.0519 g.
B. the mass is 19.3 g.
C. the mass is 45.0 g.
D. the mass is 105 g.
Answer:
The answer is D. The mass is 105g.
What did you find out from this investigation? Be thoughtful in your answer.
Helium gas (He) is an element and not a compound. Why is this true?
when is an object in free fall
Answer:
a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.
please answer its due in 10 minutes teacher just assigned it 5 minutes ago
Answer:
please upload a clearer picture
Answer:
1 Rain falling down
2)Freezing 3)Melting 4)Adding or removing energy from matter causes a physical change as matter moves from ome place to the other5)5heIf you go to the moon your mass would ___.
stay the same
increase
Answer:
stay the same
Explanation:
you would weigh less if u stood on a scale but you're still the same mass unless you chopped of a body part or something
Which of the following statements regarding the moon and Earth is correct? Question 9 options: A) The moon is older than Earth by approximately 300 million years. B) Earth is tidally locked, while the moon spins on its axis. C) Earth and the moon have nearly the same mass. D) Earth and the moon are nearly the same age.
The statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).
When did the Moon form?The Moon formation refers to the geological period of time in which our natural satellite emerged as an independent celestial body.
It has been proposed that the Moon emerged first compared to the Earth (approximately 300 million years).
In conclusion, the statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).
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Each of the atoms in alkali earths metal Family( group 2) has ___ valence Electrons .
Pleasee help I’ll mark you as brainlister
Fill in the blank
Answer:
the answer is 2 valence electrons
animals need to consume other organisms for energy. how would you categorize them based on that information?
Answer:
They would be carnivores.
Explanation:
Fill in the blank to the Periodic Pun
Oh, I ate too much! Now I’m going to _________________ the rest of the night.
Answer:
stay up?...or shxt the rest of the night
Answer:
Answer C
Explanation: