Answer:
Protons
Explanation:
Typically protons cannot be removed from the atom. Removing protons from an atom will completely change the atom as it will become another element entirely.
In an atom, protons are held by strong nuclear forces.
Within an atom, protons are the positively charged particles. Together with the neutrons, they are found in the nucleus of an atom. The number of protons within an atom is the atomic number of the atoms and it determines the nature and type of atom it is. Protons cannot be removed from an atom due to the strong binding force holding them together in place.Answer:
protons
Explanation:
The diagram shows heat energy being transferred as hot water rises to the top of the pot and cool water sinks to the bottom.
water cools
cool
water
sinks
cool
water
hot
sinks
water
rises
What process is shown in the diagram?
A conduction
B. convection
O c Insulation
O D. radiation
Complete the following sentence: In a reaction containing two reactants, if one of the reactants is in excess, the other reactant is known as the ______ reactant.
Answer:
excess reactant
Explanation:
The excess reactant is the reactant in a chemical reaction with a greater amount than necessary to react completely with the limiting reactant. It is the reactant(s) that remain after a chemical reaction has reached equilibrium.
In a reaction containing two reactants, if one of the reactants is in excess, the other reactant is known as the limiting reactant which decides the yield of the reaction.
What is limiting reactant ?In a reaction, all the reactants have to be in correct stoichiometry to complete the reaction. To achieve the mole ratio of the reactants is very much important for the completion of a reaction.
If a reactant is insufficient in amount, then the reaction will stop as soon as this reactant is consumed. Hence, this reactant determine the yield of the product. This reactant which is not in correct stoichiometry for the complete reaction is called the limiting reactant.
The reactant which is excess in quantity thus does not have a role in the yield of the reaction is called the excess reactant. Whatever, the concentration of this reactant in extra, the reaction does not proceed after the consumption of limiting reactant.
Find more on limiting reactant :
https://brainly.com/question/14225536
#SPJ2
describe how oxides of nitrogen are produced when petrol is burned in car engines !!HELP!!
Answer:
Answer is on the pic
Explanation:
I hope it's helpful!
HELP !!!
1. How do substances like CO2 and water move in and out of the cell? Explain.
Answer:
The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. ... When the concentration outside the cell becomes low and it is high inside the cell, they moves out.
Answer:
CO2 moves by diffusion and H2O move by osmosis through cell membrane .9. t An element that has only 5 electrons in the 4p orbital is located in which group? A. O Group 1 B. Group 17 C. O Group 2 D. Group 8
Answer:
B. Group 17
Explanation:
The element is Bromine. Its electron configuration is:
1s2 2s2p6 3s2p6d10 4s2p5
You can see that its last orbital is 4p^5 for 5 electrons in the 4p orbital.
8. What is the molar mass of carbon dioxide, Co2(g)? How many grams of carbon
dioxide would there be for 3 moles? Explain.
Answer:
CO2 molar mass=44.01g
3 moles CO2 = 132.03g
Explanation:
CO2 molar mass = 12.01+2(16.00)=44.01g
3 moles CO2 * (44.01 g CO2)/(1 mol CO2)=132.03g
(Answer would be different depending on the number of decimals)
what is the mass of 2.40 moles of h3po4?
Answer:
i think am right Molar mass of H3PO4 is 97.9952 g/mol Copy to clipboard. Compound name is phosphoric acid. Convert between H3PO4 weight and moles ...
Explanation:
Explanation:
Molar mass of H3PO4 = 97.99g/mol
Mass of 2.40 moles of H3PO4
= 2.40mol * (97.99g/mol) = 235.2g.
Is the method for converting molecules to moles the same as that for atoms?
Answer:
One mole is the Avogadro's number of particles (atoms, molecules, ions or electrons) in a substance. Converting to moles is fairly easy because the conversion is always the same.
The smallest fundamental of an element is called an atom while two or more atoms join together to produce a molecule. Molecules are the fundamental of any given compound or a substance.
Yes, the method of converting molecules and atoms to moles are similar.
The method of conversion can be explained as:The moles are defined by the presence of Avogadro's number that gives the number of particles present in a substance.The method of converting molecules into moles requires the division of the molecules by [tex]6.02 \times 10^{23}[/tex]. This number which is used in dividing is called Avogadro's number.For converting atoms into moles the number of atoms is divided with the Avogadro's number [tex]6.02 \times 10^{23}[/tex].Therefore, the conversion to moles is easy and the same.
Learn more about moles and Avogadro's number here:
https://brainly.com/question/16398159
What is one role of the American Heart Association?
Answer:approving new heart medications for public use
Explanation:
How many molecules are in 2.91 X 1022 atoms of He
Answer:
Explanation:
1 mole of oranges contains 6.02 x1023 oranges. 1 mole of helium gas contains 6.02 x1023 helium atoms. 1 mole of water contains 6.02 x1023 water molecules.
...
Answer:
25194.56
Explanation:
You'll need a scientifuc calculator
2.91*10^22*1 = 2.91E22
2.91E22-/6.02*10^23=25194.56
6.02*10^22 Is the Mole number
show how to work out...Calculate the mass in grams of 3.50 x 1025 atoms of lithium. Answer: 404g Li
Write the balanced chemical equations for the following double-replacement reactions.
(Steps: skeleton equation/count number of atoms in reactants and products/balance both sides)
Q24. Aqueous lithium iodide and aqueous silver nitrate react to produce solid sikrer iodide and
1 aqueous lithium nitrate.
A24.
I need the balanced chemical equation for this question
The balanced equation :
LiI(aq) + AgNO₃(aq) --> AgI(s) + LiNO₃(aq)
Further explanationGiven
Word equation
Required
Balanced equation
Solution
There are 3 ways to express a chemical equation:
word equation skeleton equation balanced equationSkeleton equation for reaction above :
LiI(aq) + AgNO₃(aq) ⇒ AgI(s) + LiNO₃(aq)
If we look at this reaction, all the cations and anions have a charge of 1 (+1 or -1) so the balanced reaction between the skeleton equation and the balanced equation is the same
I
True or false for these questions
Answer:
truensosjd9ddk4nk9oi I h
hhu
Explain how natural resources are identified and why natural recourses are in evenly distributed.
Answer:
Natural resources are not evenly distributed all over the world. Some places are more endowed that others — for instance, some regions have lots of water (and access to ocean and seas). Others have lots of minerals and forestlands. Others have metallic rocks, wildlife, fossil fuels and so on.
Explanation:
A boat covers 2,000 meters in 30 minutes. How fast are they traveling
Which three elements are combined in cslcium nitrate?
Answer: calcium, nitrogen and oxygen
Explanation:
All of the devices below either use or produce electrical energy. Which one converts mechanical energy to electrical energy?
E.Battery
F.Electrical drill
G.Wind turbine
H.Electric guitar
Answer:
G wind turbine
Explanation:
they get mechanical energy fron the wind the turns into electrical energy
Answer:
G is correct
Explanation:
just saying
You need to make an aqueous solution of 0.197 M barium nitrate for an experiment in lab, using a 500 mL volumetric flask. How many grams of solid barium nitrate should you add?
Answer:
Mass of barium nitrate needed = 25.74 g
Explanation:
Given data:
Molarity of solution = 0.197 M
Volume of solution = 500 mL (500 mL× 1 L /1000 mL = 0.5 L)
Mass of barium nitrate needed = ?
Solution:
Molarity = number of moles of solute / volume in L
0.197 M = number of moles of solute / 0.5 L
Number of moles of solute = 0.197 mol/L ×0.5 L
Number of moles of solute = 0.0985 mol
Mass of barium nitrate:
Mass = number of moles × molar mass
Mass = 0.0985 mol × 261.32 g/mol
Mass = 25.74 g
What kind of reaction is symbolized by AB + C → CB + A?
A. Single replacement
a
B. Double replacement
C. Decomposition
D. Synthesis
SUBMIT
Since a single replacement reaction involves the change of an atom by another, the reaction is a single replacement reaction.
What is a reaction?The term chemical reaction is another word for chemical change. It involves an interaction between two or more chemical species leading to the formation of a new chemical species.
The reaction AB + C → CB + A is a single replacement reaction because The A in the reactant side is replaced by C while it becomes displaced.
Learn more about single displacement reaction: https://brainly.com/question/13328989
Answer:
single displacement
Explanation:
trust
The following chemical reaction takes place in aqueous solution:
ZnBr2(aq)+2 NaOH(aq) --Zn(OH),(s)+2 NaBr(aq)
Write the net ionic equation for this reaction.
Answer:
[tex]{\rm Zn^{2+}}\, (aq) + {\rm 2\; OH^{-}}\, (aq) \to {\rm Zn(OH)_2}\, (s)[/tex].
Explanation:
Ionic Equation for this reactionRewrite only the species that exist as ions. Those species typically include:
soluble salts,strong acids, and soluble bases.In this reaction, both [tex]{\rm ZnBr_2}\, (aq)[/tex] and [tex]{\rm NaBr}\, (aq)[/tex] are salts. The state symbol "[tex](aq)[/tex]" suggests that both of these salts are soluble. Hence, both of these salts exist as ions and should be rewritten:
Each [tex]{\rm ZnBr_2}\, (aq)[/tex] formula unit would exist as one [tex]{\rm {Zn}^{2+}}\, (aq)[/tex] and [tex]2\; {\rm Br^{-}}\, (aq)[/tex]. Notice how there are twice as many [tex]{\rm Br^{-}}[/tex] ions as [tex]{\rm {Zn}^{2+}}[/tex] ions.Each [tex]{\rm NaBr}\, (aq)[/tex] formula unit would exist as one [tex]{\rm Na^{+}}\, (aq)[/tex] and one [tex]{\rm Br^{-}}\, (aq)[/tex].Similarly, the state symbol "[tex](aq)[/tex]" suggests that the base [tex]\rm NaOH[/tex] is also soluble:
Each [tex]{\rm NaOH}\, (aq)[/tex] formula unit would exist as one [tex]{\rm Na^{+}}\, (aq)[/tex] and one [tex]{\rm OH^{-}}\, (aq)[/tex].On the other hand, the state symbol "[tex](s)[/tex]" suggests that the base [tex]{\rm Zn(OH)_2}\, (s)[/tex] is a precipitate and is not soluble. Rather, the bonds within [tex]{\rm Zn(OH)_2}[/tex] stay mostly intact, and this species would not exist as ions. Hence, do not rewrite [tex]{\rm Zn(OH)_2}\, (s)\![/tex] when deriving the ionic equation for this reaction.
Hence, the ionic equation for this reaction would be:
[tex]\begin{aligned}&\underbrace{{\rm Zn^{2+}}\, (aq) + 2\, {\rm Br^{-}}\, (aq)}_{\text{from ${\rm ZnBr_2}\, (aq)$}} + \underbrace{2\, {\rm Na^{+}}\, (aq) + 2\, {\rm OH^{-}}\, (aq)}_{\text{from $2\, {\rm NaOH}\, (aq)$}} \\ & \to \underbrace{{\rm Zn(OH)_2}\, (s)}_{\text{precipitate}} + \underbrace{2\, {\rm Na^{+}}\, (aq) + 2\, {\rm Br^{-}}\, (aq)}_{\text{from $2\, {\rm NaBr}\, (aq)$}}\end{aligned}[/tex].
Net Ionic Equation for this reactionEliminate species that are present on both sides of the ionic equation to obtain the net ionic equation. A species should be eliminated if only if an equal number of this species are found on both sides of the ionic equation. Otherwise, subtract from the side with a larger number of that species.
For this reaction, the net ionic equation would be:
[tex]{\rm Zn^{2+}}\, (aq) + {\rm 2\; OH^{-}}\, (aq) \to {\rm Zn(OH)_2}\, (s)[/tex].
Plant cells use photosynthesis to make food. Plant cells also use cellular respiration to get energy from the food they make. How is cellular respiration different from photosynthesis?
A Photosynthesis produces ATP, and cellular respiration produces sugars.
B Photosynthesis requires oxygen, and cellular respiration requires carbon dioxide
C Photosynthesis produces oxygen, and cellular respiration produces carbon dioxide.
D Photosynthesis requires energy from food, and cellular respiration requires energy from the sun.
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process. So, the answer is A.
Explanation:
I hope this helps. :D
Cellular respiration is different from photosynthesis as photosynthesis produces ATP, and cellular respiration produces sugars. Hence, option A is correct.
What is photosynthesis?Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
Photosynthesis converts carbon dioxide and water into oxygen and glucose.
Glucose is used as food by the plant and oxygen is a by-product.
Cellular respiration converts oxygen and glucose into water and carbon dioxide.
Water and carbon dioxide are by-products and ATP is energy that is transformed from the process.
Hence, option A is correct.
Learn more about photosynthesis here:
https://brainly.com/question/1388366
#SPJ2
How many grams of Fe are needed to create 32.5mol Fe3O4?
Answer:
5444.89 grams of Fe
Explanation:
1) We need the chemical equation for Fe3O4 to find the mole ratio for Fe to Fe3O4. Chemical equation:
3Fe+4H2O → Fe3O4+4H2
The mole ratio of Fe to Fe3O4 is 3:1
2) Now, we find how many grams of Fe are needed to produce 32.5 moles of Fe3O4.
[tex]32.5 moles Fe3O4[/tex][tex]x \frac{4 mole O}{1 mole Fe3O4}[/tex] = 97.5 moles Fe needed to produce 32.5 moles of Fe3O4
3) Convert 97.5 moles of Fe into grams. The molar mass of Fe is 55.845g.
[tex]97.5 mole Fe[/tex][tex]x\frac{55.845g Fe}{1 mole Fe}[/tex] = 5444.8875g or 5444.89g.
Can someone help me on this please
Answer:
the answer for 5 is liquid
What salt would form when each of the following
strong acid/strong base reactions takes place?
a. HCl(aq) + KOH(aq)
b. RbOH(aq) + HNO3(aq) -
C. HCIO4(aq) + NaOH(aq) →
d. HBr(aq) + CsOH(aq) →
PLEASE HELP I NEED TO TURN IT IN !! IN 10 MINUTES
Iron sulfide is a compound. It is made by heating a mixture of iron and sulfur.
Describe and explain the differences between iron sulfide and a mixture of iron and sulfur.
Answer:
Here are some of the differences between a mixture of iron and sulfur, and iron sulfide: the mixture can contain more or less iron, but iron sulfide always contains equal amounts of iron and sulfur. the iron and sulfur atoms are not joined together in the mixture, but they are joined together in iron sulfide.
Explanation:
Which of the following is TRUE about an astronaut traveling from planet to planet?
The weight changes, but his or her mass does not.
The weight and mass both stay the same.
The weight and mass both change.
The mass changes, but his or her weight does not. PLEASE ANSWER QUICKLY
Answer:
The weight changes, but his or her mass does not.
Explanation:
The true statement from the given choices about an astronaut traveling from planet to planet is that the weight changes but his or her mass does not.
This is due to the difference in acceleration due gravity from one planet to the other.
Mass is the amount of matter present within a substance. Weight is the vertical force on a body due to its mass and acceleration due gravityGravity from one planet to the other differs significant and so is the weight.
When animals breathe, which of Earth's sphere's are interacting?
Calculate the volume, at STP, of a 0.950 g sample of Carbon Monoxide gas, CO.
Answer:
0.76L is the pressure of CO at STP
Explanation:
To solve this question we must use combined gas law:
PV = nRT
Where P is the pressure of the gas (1atm at STP)
V is volume (Our incognite)
n are moles of the gas (0.950g * (1mol/28g) = 0.034 moles
R is gas constant (0.082atmL/molK)
T is absolute temperature (273.15K at STP)
V = nRT/P
V = 0.034mol*0.082atmL/molK*273.15K / 1atm
V = 0.76L is the pressure of CO at STP
How is the chemical bonding within a crystal of gold (Au) different from the
chemical bonding within a crystal of table salt (NaCl)?
Answer:
In the gold crystal, the atoms are bonded by freely moving electrons. In the salt crystal, the atoms are bonded by the attraction of opposite electrical charges.
Explanation:
A.pex
A crystal of Gold (Au) has metallic bonding whereas a crystal of NaCl has ionic bonding.
What is Chemical Bonding?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.
Ionic bonding occurs by transfer of electrons from one atom to another and is usually between a metal and a non metal atom. This type of bond is classically described as occurring when atoms interact with one another to either lose or gain electrons.
Metallic bonds are the chemical bonds that hold atoms together in metals.
Therefore, A crystal of Gold (Au) has metallic bonding whereas a crystal of NaCl has ionic bonding.
Learn more about Chemical Bonding, here:
https://brainly.com/question/15444131
#SPJ5
"Potassium sulfide is reacted with nitric acid."
Identify the type of the reaction.
Explanation:
K2S + 4HNO3 → 2KNO3 + 2NO2 + S + 2H2O. Potassium sulfide react with nitric acid to produce potassium nitrate, nitrogen dioxide, sulfur and water. Nitric acid - concentrated
PLEASE MARK AS BRAINLIEST
The reaction of Potassium sulfide with nitric acid is a double displacement reaction.
What is displacement reaction?A displacement reaction can be defined as one wherein a set of atoms is displaced by another atom in a molecule. For example, when the iron metal is added to a solution of copper sulfate, it displaces the copper metal.
[tex]A + BC \longrightarrow AC + B[/tex]
A single displacement reaction can be described as a kind of oxidation-reduction reaction when an element moves out of a compound, one element is replaced by the other in a compound.
Double displacement reactions occur mostly in aqueous solutions wherein the ions precipitate and the exchange of ions takes place. The double displacement reaction can be represented as:
[tex]AB+CD\longrightarrow AC+ BD[/tex]
The reaction between the potassium sulfide and nitric acid gives hydrogen sulfide and potassium nitrate.
[tex]K_2S (aq) + 2HNO_3 (aq) \longrightarrow H_2S(g) + 2KNO_3(aq)[/tex]
Learn more about Double displacement reaction, here:
https://brainly.com/question/10210271
#SPJ2