Answer:Okay, so first, let's turn the grams into moles.
1.3 g C / 12.011 g/mol = 0.1082341187 mol C
Next, we need to multiply it by Avogadro's Number for the number of atoms.
0.1082341187 mol C * 6.022*10^23 mol^-1 = 6.51785863*10^22 atoms C
Now we take significant figures into consideration. We started with two, so we need to end it with two.
6.5*10^22 atoms C
Explanation:
Select the correct answer.
What are the oxidizing agent and the reducing agent in this chemical equation?
3FeS + 8HNO3 → 3FeSO4 + 8NO + 4H2O
A.
FeS is the oxidizing agent, and HNO3 is the reducing agent.
B.
HNO3 is the oxidizing agent, and NO is the reducing agent.
C.
FeS is the reducing agent, and HNO3 is the oxidizing agent.
D.
HNO3 is the reducing agent, and NO is the oxidizing agent.
Answer:
Its answer choice C
Compute the following and give your answer in scientific notation:
(3.51 x 10-²) - 2.94 × 10-²
=
× 10^
the mass number of an atom is 15, and its atomic number is 7. the atom probably has... the mass number of an atom is 15, and its atomic number is 7. the atom probably has... at least 15 electrons. 7 electrons in the nucleus. 7 units of negative charge in the nucleus. 8 neutrons in the nucleus. about as much mass in electrons as in protons.
The atom probably has 8 neutrons in the nucleus.
Atomic number (Z) is total number of protons and mass number (A) is total number of protons and neutrons in a nucleus.
N(p⁺) = Z = 7; number of protons in the atom
A = N(p⁺) + N(n°)
N(n°) = A - N(p⁺)
N(n°) = 15 - 7
N(n°) = 8; number of neutrons in the atom
N(e-) = N(p⁺) = 7; number of electrons in the atom
Neutron (symbol: n°) is a subatomic particle with no net electric charge.
Protons and neutrons are found in nucleus of an atom (atomic nuclei).
More about neutron: brainly.com/question/15120322
#SPJ4
Which layer will be the ether layer in a separatory funnel containing diethyl ether and a saturated aqueous solution of nacl?.
The bottom layer will be the ether layer
a mixture in which the solute dissolves until it is no longer able to do so, leaving the undissolved components at the bottom. Solution without saturation. a solution that totally dissolves and leaves nothing behind (but has less solute than the saturated solution) A saturated solution is one that has as much of the solute present as is capable of dissolving. A solution is said to be unsaturated if it doesn't contain all of the solute that can dissolve in it. A saturated solution is one that has as much solute in it as can be dissolved under the circumstances under which it is present.
To know more about saturated solution refer to https://brainly.com/question/13533704
#SPJ4
Complete Symbols
Find each of these:
a) number of protons
b) number of neutrons
c) number of electrons
d) atomic number
e) mass Number
80Br35
Answer: a) 35 , b) 45 , c) 35 , d) 35 , e) 80
Explanation:
a) - protons equal to atomic number of element , b) - subtract atomic number by number of protons to get neutrons (80 - 35 = 45) , c) - protons same as electrons unless its an ion , d) - atomic number is equal to protons , e) - protons plus neutrons equal mass number (35 + 45 = 80). :)
which two sentences taken together provide the best evidence to support the ideas that both physical and chemical change can significantly change the appearance of a substance ?
A. in a physical change the material involved is structurally the same before and after the change
B. a piece of metal may be heated in a fire until it glows but the metal is the same material before Heating and after Cooling
C. chemical changes require the breaking and forming of chemical bonds during a chemical reaction
D. the creation of a new ,solid substance from to liquid substance into the kids that a reaction has taken place that has alerted the original substance
Answer:
A ithink
Explanation:
The chemical changes require the breaking and forming of chemical bonds during a chemical reaction. The correct option is C.
What is chemical bond?Chemical Bonding refers to the formation of a chemical bond between two or more atoms, molecules, or ions to give rise to a chemical compound.
These chemical bonds are what hold the atoms in the resulting compound together.
A chemical bond is a bond formed when the atoms in a compound's molecule combine and are held together by a strong combining force.
Chemical bonds are classified into two types namely ionic bonds and covalent bonds.
Chemical bonding enables scientists to combine the elements of the periodic table in a variety of ways to create chemical compounds and materials.
Thus, the correct option is C.
For more details regarding chemical change, visit:
https://brainly.com/question/23693316
#SPJ2
8. What is a quasar?
Candi uses wires to connect a battery to a light bulb. She knows she has made a complete circuit because the light bulb lights up.
Candi's teacher gives her a wire that has a lot more resistance than the wires she used at first. Candi removes one of the original wires from her circuit and puts the high-resistance wire in its place. What effect will this most likely have on the circuit?
A.
Less current will flow, so the light bulb will be dimmer.
B.
More current will flow, so the light bulb will be brighter.
C.
The battery will have more voltage, so the light bulb will be brighter.
D.
The battery will have less voltage, so the light bulb will be dimmer.
true or false: u find soil rich in humus in horizon c
Answer:
True
Explanation:
Which statement is true about nuclear fusion?
A: It is caused by the same process that causes nuclear fission.
B: It does not occur naturally in the solar system.
C: It has very low activation energy.
D: It produces nearly all the elements that are heavier than helium.
Answer:
its d
hope it helpss :)))
Answer: D
Explanation:
If you have 3 moles of O2, how many O2 molecules do you have?
Answer:
You have 3 moles, so there are 18481.518 oxygen molecules
Explanation:
There are 18.066×10²³ molecules of oxygen present in 3 moles of oxygen.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.
Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Learn more about moles,here:
https://brainly.com/question/26416088
#SPJ2
1. Sara wants to see if a new brand of hair dye lasts longer than the brand she
currently uses. She puts the new hair dye on the left side of her head and the old
brand on her right side. After 2 weeks she observes which side of her head has
more gray hair showing through.
1. Sara wants to see if a new brand of hair dye lasts longer than the brand she
currently uses. She puts the new hair dye on the left side of her head and the old
brand on her right side. After 2 weeks she observes which side of her head has
more gray hair showing through.
Wher do most living thing get the energy they need for life
Answer:
Earth
Explanation:
Which process is a genetic engineering process?
exposing food to radiation, which causes mutation in the genes
removing DNA from cells of the food
replacing some genes of the food with genes from other species
protecting food with an antimicrobial coating
Answer:
The third option should be right
Answer:
C.
Explanation:
edg. 2020 just took the test
what is the chloride anion
Answer:
Cl-
Explanation:
When chlorine reacts with other substances, it usually forms the chloride ion (Cl-). This is because it has seven valence electrons, and in order to gain a full octet, it has to gain one electron (which has a negative charge). For example, when it reacts with Sodium (Na), the product is table salt (NaCl) because chlorine takes one electron from sodium and becomes Cl-. Sodium also becomes Na+, because it loses one electron.
The movement of the tectonic plates on the earth is caused by
Answer:
The movement of tectonic plates is caused by convection currents in the molten rock in Earth's mantle below the crust layer. Earthquakes and volcanoes are great examples of the tectonic movement's results.
Explanation:
Energy from the Sun reaches Earth mainly by the process of *
1 point
conduction
convection
reflection
radiation
Answer:
D. Radiation
Explanation:
The Sun always transfers its energy to any planet (Including Earth) through solar radiation, infrared, and UV rays. These are all examples of radiation.
I hope this helps you! Good luck with your test/assignment! :D
if two molecules of glucose (c6h12o6) are joined via condensation synthesis, the resulting molecule would have a molecular formula of .
The condensation reaction between two molecules of glucose would result in the formation of maltose (C12H22O11) and the release of water.
Carbohydrates are organic compounds that are used to store energy. An example of a carbohydrate is glucose, which is a single sugar or a monosaccharide. The process of forming larger molecules from the combination of simple sugars is called the condensation process. A water molecule is released in the process of combining the molecules together through a glycosidic bond.
The condensation reaction for two molecules of glucose (C6H12O6) results in the formation of maltose, a disaccharide, and the release of water. The molecular formula of maltose is C12H22O11. It can be observed that the condensation reaction shown below is balanced.
Glucose (C6H12O6) + Glucose (C6H12O6) → Maltose (C12H22O11) +H2O
To learn more regarding the condensation reaction of sugars, please refer to https://brainly.com/question/24950735.
#SPJ4
the answers to the Lab: Calorimetry and Specific Heat
step3:
aluminum- 11.98
copper-12.14
iron- 12.31
lead- 12.46
step5: 12.46, 52.31, 39.85
step7: 100, 22.4, 27.1, 4.7, 72.9
step5: 12.26, 52.49, 40.13
step7: 100, 22.7, 24.6, 1.9, 75.4
step5: 12.42, 52.66, 40.24
step7: 100, 22.5, 24.9, 2.4,75.1
step5: 12.34, 51.99, 39.65
step7: 100, 22.6, 23.3, 0.7, 76.7
step8: 0.90,0.35,0.44,0.12
Answer:
Thank you! Thank you! Thank youuuuuu
Explanation:
You saved my buttt!?!???!?!?!!?
whoever answers this first gets brainly
Answer:
A option
Explanation:
water gets split in photosynthesis
What does how light or dark an object appears depend on?
Answer:
By the wavelength of the light transmitted by it.
Explanation:
The color of a transparent object is determined by the wavelength of the light transmitted by it. An opaque object that reflects all wavelengths appears white; one that absorbs all wavelengths appears black.
can anyone answer this question pleaseeeee
Answer:
A.
Explanation:
I'm pretty sure that its right because I know bases aren't soluble and I've never heard anything about all of them being neutralizing to acids.
Hope this helps!
Write an expression that evaluates to true if and only if the string variable s equals the string end.
Answer:
Declare a variable populationChange, suitable for holding numbers like -593142 and 8930522.
int populationChange
what is the first step in this process
What is an alkaline earth metal that has 5 shells?
Answer:
The elements in the alkaline earth metals group; beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra), have two electrons in their outer electronic shell.
Explanation:
The alkaline earth metals consisted of 5 shells have been beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
The alkali earth metal has been the element of group 2. The elements have consisted of the 2 valence electrons.
The electrons in the elements have been assigned the electron address based on the capacity of the shells to occupy electrons.
The electrons have been filled based on the energy level of the shells.
The order of the increasing energy level has been:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s.
The elements with the occupied 4p shells will have the 5 shells.
The elements in group 2 consisted of 5 shells have been beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
For more information about alkaline earth metal, refer to the link:
https://brainly.com/question/11857448
PLEASE I NEED HELP!!
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of?
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
2.64
Gold
3.52
Platinum
Density g/cm
8.92
Marble
Quartz
19 32
Diamond
214
O Marble
Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
Which question can be used to identify a physical property of an element?
Does a magnet attract the element?
Does rust form when the element is exposed to oxygen?
Do bubbles form when the element is mixed with an acid?
Does the element burn when held over a Bunsen burner flame?
Answer:
Does a magnet attract the element?
Explanation:
This is because, the attraction of an element by a magnet is a purely physical property. It has to do with the orientation of the electrons in the element. It does not tell us of the composition of the element or how it reacts with other elements. Whereas, the other questions deal with the chemical properties of the element. That is, how it reacts with other elements or substances.
Which coefficients will balance the following reaction:
Answer:
C option
Explanation:
please Mark me brainliest
Electron configuration of vanadium-52
Answer:
[Ar]4s23d3
Explanation:
Need a bit of help with this. Fill in the coefficients, explain your answer.
Answer:
4Fe + 3O₂ → 2Fe₂O₃
General Formulas and Concepts:
Chemistry - Reactions
Balancing ReactionsExplanation:
Step 1: Define
RxN: Fe + O₂ → Fe₂O₃
Step 2: Balance
We need to balance both Fe and O.
LCM of 2 and 3 is 6:
Fe + 3O₂ → 2Fe₂O₃
We now need the same amount of Fe on both sides:
4Fe + 3O₂ → 2Fe₂O₃