Answer:
C.ratio of elements in the compound.
Explanation:
A compound is a substance that constitutes two or more elements in a defined proportion. A chemical compound is different from another compound in what it contains i.e. elements. A chemical formula shows the elements contained in a specific compound. For example, the chemical formula of sodium chloride (NaCl) shows us that it contains Sodium (Na) and Chlorine (Cl) elements as represented by symbols.
In addition to this, a chemical formula also shows the ratio of each element that makes up the compound. An element can have more than one atom in a compound. For example, CaCl2 is the chemical formula for Calcium chloride and it shows is that the ratio of Calcium (Ca) to Chlorine (Cl) is 1:2.
The correct answer is C, the ratio of elements in the compound.
Compound:-
A compound is a substance that constitutes two or more elements in a defined proportion. A chemical compound is different from another compound in what it contains i.e. elements.
Chemical formula:-It shows the elements contained in a specific compound. For example, the chemical formula of sodium chloride (NaCl) shows us that it contains Sodium (Na) and Chlorine (Cl) elements as represented by symbols. A chemical formula also shows the ratio of each element that makes up the compound. An element can have more than one atom in a compound. For example, [tex]MgCl_2[/tex] is the chemical formula for Magnesium chloride and it shows that the ratio of Magnesium to Chlorine (Cl) is 1:2.Hence, the correct answer is C.
To know more about:-
brainly.com/question/12321571
Why does common table salt (NaCl) have a high melting point?
A.
It forms an ionic bond with a crystal lattice structure.
B.
It forms a covalent bond with a Lewis dot structure.
C.
It forms a metallic bond with an electron sea model structure.
D.
It forms a covalent bond by sharing electrons.
E.
It forms a metallic bond with a Lewis dot structure.
Answer:C is not the answer. I just got it wrong in Edmentum
Explanation:
How many moles are in 255 mL of a 2.35 M solution of H2SO4?
Answer:
.59925 moles
Explanation:
Compounds formed when non-metals react with metals consist of particles called ionic compound
The atomic number of an atom is
a) The mass of the atom
b) The number of protons added to the number of neutrons
c) The number of protons
d) Negatively charged
Answer:
b, the number of protons added to the number of neutrons
Explanation:
What are orbitals?
A. Energy levels occupied by neutrons
B. Areas within an energy level that are occupied by electrons
C. Regions of the atom that contain protons
D. Circular paths around the nucleus
Answer:
B. Areas within an energy level that are occupied by electrons
Explanation:
Its not A because there are different orbitals on each energy level.
Answer:
B
Explanation:
10 Points
Atoms are very small. Approximately how many atoms would it take to
make a stack as thick as a potato chip?
O
A. Thousands
O
B. Hundreds
C. Billions
OD. Millions
Reset Selection
Answer:
C. Billions
Explanation:
or even more
Label the following ph paper color as either strong / weak acid, strong/weak base, or neutral
1. neutral
2.strong base
3.weak acid
4.strong acid
5.weak base
Atoms with a high electronegativity, like oxygen have a strong attractive force
for electrons because
A. they have only a few valence electrons and need a total of eight to
fulfill the octet rule
O B. they're trying to share electrons with other elements of high
electronegativity
O C. opposites attract
O D. they re close to filling their outer shell, fuffilling the octet rule
Answer:
D. they're close to filling their outer shell, fulfilling the octet rule
Explanation:
:)
What happens to mass in an isolated system?
Answer:
In isolated sysrem mass remains constant.
Explanation:
Answer:
Yes is remains constant
Explanation:
Isolated systems can't make energy or matters come in or out, so the mass stays the same.
Think of it as a marble in a balloon once you tie it and shake the marble in the balloon, there is no extra marbles coming in nor is the marble out of the balloon so that mass(weight is the same.
Find the molar mass of s6
Moles: 1
Weight, g : 192.3900
Answer:
Moles: 1
Weight, g : 192.3900
Explanation:
WILL MARK BRAINLIEST IF CORRECT
Calculate the average rate of change for the graphed sequence from n = 1 to n = 3. graphed sequence showing point 1, 2, point 2, 4, point 3, 8, point 4, 16, point 5, 32, and point 6, 64
A. 1
B. 2
C. 3
D. 6
Answer:it b
Explanation:
I've done that before
Answer:
The Answer is C or 3
Explanation:
I took the test
Baking soda, NaHCO3, can be commercially produced during a series of chemical reactions called the Solvay process. In this process, NH3(aq), NaCl(aq), and
other chemicals are used to produce NaHCO3(s) and NH Cl(aq).
To reduce production costs, NH3(aq) is recovered from NHCl(aq) through a different series of reactions. This series of reactions can be summarized by the
overall reaction represented by the unbalanced equation below.
NHACH(aq) + Ca(s) - NH3(aq) + H20() + CaCl(aq)
Balance the equation below for the overall reaction used to recover NH3(aq), using the smallest whole-number coefficients.
Answer:
CaO(s) + 2NH4Cl(aq) -------> CaCl2(aq) + H2O(l) + 2NH3(g)
Explanation:
The solvay process is an important process in the chemical industry. In this process, ammonia gas is first dissolved in concentrated brine to form a mixture known as ammoniacal brine. This solution is made to trickle down the tower. A counter stream of carbon dioxide is forced up the tower. The two substances react to form sodium hydrogen trioxocarbonate IV. This substance is only slightly soluble and separates out as a solid sludge. The product is now dried and heated to give sodium trioxocarbonate IV.
The overall reaction of the process can be given as;
CaO(s) + 2NH4Cl(aq) -------> CaCl2(aq) + H2O(l) + 2NH3(g)
Calcium chloride is merely a by-product.
Answer:
Based on Reference Table F, which solution will contain the highest concentration of
iodide ions?
A
lead iodide
silver iodide
mercury (II) iodide
iron (11) iodide
4) A 4.00 L balloon is filled with 0.297 moles of helium gas with a pressure
of 0.910 atm. Calculate the temperature, in Kelvin, of the gas. (KEEP 3 SIG
FIGS; DO NOT TYPE ANY UNITS)*
Answer: 149
Explanation:
Using the ideal gas equation; PV = nRT
P= Pressure = 0.910 atm, T= Temperature = ?
V= Volume = 4.0L R = Gas constant = 0.08206 L.atm/mol/K
n = number of moles = 0.297
Making 'T' the subject of the formular, we have;
T = P V/ n R = 0.910 x 4 / 0.297 x 0.08206
= 149
What gas is produced by the re
baking soda?
a. oxygen
B. petroleum
С. helium
D. Carbon dioxide
Answer:
D. Carbon dioxide
Explanation:
Explanation:
What gas is produced by the re action of
baking soda?
Baking soda Formula: NaHCO₃
Water Forumula: H2O
Carbon Dioxide Formula: CO2
So I'm going to guess the question was baking soda with water
NaHCo3 + H2O = NaCo3 + H3O
Hmm, nope that's not it.
Maybe it meant decomposition
NaHCO3 = Na2CO3 + H2O + CO2
In which case it would be Carbon Dioxide
why is the renewable energy resource you chose is negative?
Answer:
There’s a high need for energy storage and are very expensive. Renewable energy is also not always available because some need sun while others need wind.
Explanation:
What does Boyle's law state about the relationships among temperature, volume,
and pressure?
When the pressure of a gas decreases, the volume and the temperature of the
gas both increase.
As the volume of a gas increases, the temperature and pressure of the gas both
decrease.
Provided temperature remains constant, the volume and pressure of a gas are
inversely related
When the temperature of a gas increases, the volume and pressure of the gas
both decrease.
Answer:
Provided temperature remains constant, the volume and pressure of a gas are inversely related
Explanation:
Robert Boyle discovered that as long as the temperature of a gas remains constant, the relationship between the volume and the pressure of the gas is inverse. Basically, as the volume of a gas increases, its pressure decreases. As the pressure of the gas increases, its volume decreases.
Boyle's law states relationships among temperature, volume, and pressure are the provided temperature remains constant, and the volume and pressure of a gas are inversely related. The correct option is C.
What is Boyle's law?Robert Boyle gave the Boyle's law. It is also called Boyle–Mariotte law, or Mariotte's law. The law states that at a constant temperature, the volume of the gas increases with the increase in pressure. They are inversely proportional to each other.
The formula of Boyle's law is
P₁V₁=P₂V₂
P₁ = first pressure
P₂ = second pressure
V₁ = first volume
V₂ = second volume
This law tells the relationship between volume and pressure and the temperature of the air.
Thus, the correct option is C. Provided temperature remains constant, the volume, and pressure of a gas are inversely related.
To learn more about Boyle's law, refer to the below link:
https://brainly.com/question/1437490
#SPJ2
Balance the following chemical
equation by providing the correct
coefficients.
_FeBr3 +_Na2S -> _Fe2S3 + _NaBr
Answer:
2FeBr3 + 3Na2S ➡️ Fe2S3 + 6NaBr
What do we call each step that makes up a reaction mechanism?
A. reaction step
B. individual step
C. Elementary Step
D. reactant step
Answer:
c elementary
Explanation:
they are formed and then created later
What is the charge on an electron?
O-1
O 0
O +1
O +2
Answer:
-1
Explanation:
Because it is the smallest sub-atomic particle
Values for the molar mass of nitrogen, oxygen, and nitrogen dioxide molecules are given in the table below. What mass of nitrogen dioxide molecules is formed when 1 mole of nitrogen reacts with 2 moles of oxygen and forms nitrogen dioxide? Choices: A). 92.02g B). 46.01g C). 23.00g D) 2.00g
Answer:
A). 92.02g
Explanation:
Equation of the reaction;
N2 (g)+ 2O2(g)------> 2NO2(g)
Note that the balanced reaction equation is the first step in solving any problem on stoichiometry. Once the reaction equation is correct, the question can be easily solved.
Reaction of one mole of nitrogen gas with two moles of oxygen gas yields two moles of nitrogen dioxide.
Mass of two moles of nitrogen dioxide= 2[14 + 2(16)] = 2[14+32]= 2[46]= 92 gmol-1
Therefore; Mass of two moles of nitrogen dioxide is 92
hii:) how to do (c)?
Answer:
C
Explanation:
C shows a mixture of CO2 and H2O, 2 compounds
Answer:
C
Explanation:
C shows a mixture of CO2 and H2O, 2 compounds
l Active transport
IL Simple diffusion
lll Facilitated diffusion
IV. Osmosis
Which of the above type of transport moves molecules against a concentration gradient?
Your answer:
ll and lV only
l only
ll only
Answer:
l only
Explanation:
The movement of substances in living cells can either require energy (active) or not (passive) depending on the direction of movement across concentration gradient. Naturally, substances tend to move down a concentration gradient i.e. difference in concentration, which is from a region of high concentration of water to a region of low concentration. This is the passive type of transport, which does not require energy input. Examples are osmosis, simple diffusion and facilitated diffusion.
However, another type of transport exists in which substances move against the concentration gradient i.e. from a less concentrated region to a more concentrated region. In this case, energy input in form of ATP is required for this kind of transport to occur. This transport is referred to as ACTIVE TRANSPORT. Hence, the answer is I only.
Hi. Please I need About 20 Questions on Grahams Law of diffusion. Optional : ( with solutions.) Any amount of questions ranging from 5 will be appreciated
Answer:
I have posted some questions I used when learning Graham's law of diffusion
Explanation:
i posted 16 questions
I hope it helps.
Why you cannot add 0.3 moles of calcium fluoride directly to 1L of water to make a 0.3 M solution ? please only 5 mins left
Answer:
Because it's not soluble in water, need to be heated acidic solution
Explanation:
Calcium Fluoride Formula: CaF2 Comprises of Ca2+ and F−
H2O = Water H+ O2- OH-
Insoluble in water
In order to dissolve a salt, you have to break apart the ions and hydrate them via a solvent.
Need to read
HSAB concept( Pearson acid-base concept) is an initialism for "hard and soft (Lewis) acids and bases"
So F- is a Halogen which is a Hard Base
And OH- is a Hard base as well
And H- is a soft base
So soft acids react best with soft bases and hard acids react best with hard bases.
Bases don't react with other bases.
The topmost layer of the Earth is made up of large pieces that fit together like a puzzle. However, these pieces don't stay still, and sometimes they rub against each other. When these large sections of the Earth’s crust, called tectonic plates, hit each other, they send vibrations through the surface of the Earth. These vibrations are seismic waves. Seismic waves are just like the ripples in a pond. But instead of traveling through water, they travel through the Earth. When they reach the Earth's surface, they make the ground shake. That's an earthquake.
Earthquakes are the result of?
A ripples traveling through water.
B Earth’s topmost layer sinking.
C vibrations from seismic waves.
D tectonic plates staying still.
Answer:
C- vibrations from seismic waves
Answer:
C vibrations from seismic waves.
Explanation:
The shifting rock in an earthquake causes vibrations called seismic waves.
What is pressure?
O A. The heat required to change the temperature of a gas
OB. The force of gas molecules hitting their container
O C. The mixing of gas molecules due to random motion
D. The space occupied by gas molecules moving around
Answer:
B.
Explanation:
The force of gas molecules hitting their container is pressure.
Because pressure = force/area.
Where do you think trees get the nutrients they need to grow?
I
what is the effect of deforestation on quantity of oxygen gass?
Answer:
There is less oxygen because there are less trees to produce it.
Answer:
There will be less oxygen for us to breathe
Explanation:
This is because trees produce oxygen when they do photosynthesis and without as many trees we get less and less oxygen produced
could some please help me with this? thank you
Answer:
C
Explanation:
Oxidation occurs at the anode. That means the element's oxidation number should increase. Mg has an oxidation number of 0, but Mg2+ has an oxidation number of 2, showing it was oxidized.
Need help please: How many mL of 0.150 Molarity CaBr2 solution must be used to react with 50 mL of 0.115 Molarity AgNO3?
CaBr2 + 2AgNO3 --> Ca(No3)2 + 2AgBr
Answer:
0.019 L or 19.1 mL
Explanation:
Given the equation of the reaction; we have:
CaBr2 + 2AgNO3 --> Ca(No3)2 + 2AgBr
We must first obtain the number of moles of AgNO3 reacted. This can be obtained from;
Concentration of AgNO3 reacted= 0.115 M
Volume of AgNO3 reacted= 50 ml
Since
Number of moles of AgNO3= concentration of AgNO3 × volume of AgNO3
Number of moles = 0.115 M × 50/1000 = 5.75 ×10^-3 moles
From the reaction equation;
2 moles of AgNO3 reacts with 1 mole of CaBr2
5.75 ×10^-3 moles of AgNO3 reacts with 5.75 ×10^-3 moles × 1 /2 = 2.875×10^-3 moles of CaBr2
Now;
Number of moles of CaBr2= concentration of CaBr2 × volume of CaBr2
Number of moles of CaBr2= 2.875×10^-3 moles
Volume of CaBr2= ????
Concentration of CaBr2= 0.150 M
Hence;
Volume of CaBr2= number of moles of CaBr2/ concentration of CaBr2
Volume of CaBr2= 2.875×10^-3 moles / 0.150
Volume of CaBr2= 0.019 L or 19.1 mL
Answer:
19 mL of CaBr₂ solution should be used to react with AgNO₃
Explanation:
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) react:
AgNO₃: 2 molesCaBr₂: 1 mole50 ml of 0.115 M AgNO₃ react. Since molarity is the number of moles of solute per liter of solution, then you can do the following rule of three: if there are 0.115 moles of AgNO₃ in 1 L, in 0.05 L (being 1 L = 1000 mL, then 50 mL = 0.05 L How many moles are there?
[tex]moles of AgNO_{3}=\frac{0.05L*0.115 moles}{1 L}[/tex]
moles of AgNO₃=5.75*10⁻³
Now we can make a new rule of three to calculate the amount of moles necessary for CaBr₂ to react with moles of AgNO₂: if stoichiometry 2 moles of AgNO₃ react with 1 mole of CaBr₂, 5.75*10⁻³ moles of AgNO₃ with how many moles of CaBr₂ react ?
[tex]moles of CaBr_{2} =\frac{5.75*10^{-3}moles of AgNO_{3}*1 mole of CaBr_{2} }{2moles of AgNO_{3}}[/tex]
moles of CaBr₂=2.875*10⁻³ moles
Being 0.150 the molarity of the CaBr₂ compound, you can apply the following rule of three: if by definition of molarity 0.150 moles are in 1 L, 2.875 * 10⁻³ moles in how much volume is it present?
[tex]volume=\frac{2.875*10^{-3} moles*1L}{0.150 moles}[/tex]
volume=0.019 L
Being 1 L = 1000 mL, then 0.019 L = 19 mL
19 mL of CaBr₂ solution should be used to react with AgNO₃
