Answer:
Three
Explanation:
Iron
Oxygen
Hydrogen
given mass of nitrogen is 0.12 dm^3 at 60°C and 1.01*10^5 Nm^2. Find its pressure at the same temperature if its volume is changed to 0.24 dm^3
50500Nm^2 or 5.05Nm^2
Explanation:
so bring out the parameters
p1= 0.12dm3, T1= 60c , because temperature is in kelvin add 273= 333k, v1= 0.12dm3 , T2= to the same value because the temperature didn't change = 333k, v2= 0.24dm3,P2= ?
general gas equation p1v1 over T1 = P2V2 over T2, when you input everything or make p2 the subject of the formula first you'll get the answer, pressure can have an s.i unit of mmhg but I'm using the same si unit as the question given and always check your units in the question to convert. please if this question has options please check, I don't want you to fail so verify from others if I made a mistake
Which of the following would be considered an Exothermic Reaction?*
Ice Melting
Burning wood
Boiling water
Baking a cake
Answer:
Burning wood
Explanation:
the fire releases heat into the air from the burning wood
if an atom has the same amount of protons and electron, its net charge will be
positive
Natural
Negative
a 25.3-g sample of potassium sulfate is dissolved in 350.0 mL of solution. Calculate the molarity of this solution.
The molarity of the solution is approximately 0.414 M.
To calculate the molarity of the solution, we need to determine the number of moles of potassium sulfate (K2SO4) and then divide it by the volume of the solution in liters.
First, we convert the mass of the sample from grams to moles using the molar mass of potassium sulfate. The molar mass of K2SO4 is calculated as follows:
(2 * atomic mass of potassium) + atomic mass of sulfur + (4 * atomic mass of oxygen)
= (2 * 39.10 g/mol) + 32.07 g/mol + (4 * 16.00 g/mol)
= 174.26 g/mol
The number of moles (n) can be calculated using the formula:
n = mass / molar mass
n = 25.3 g / 174.26 g/mol
n ≈ 0.145 moles
Next, we convert the volume of the solution from milliliters to liters:
350.0 mL = 350.0 cm³ = 350.0 × 10⁻³ L = 0.350 L
Finally, we calculate the molarity (M) using the formula:
M = moles / volume
M = 0.145 moles / 0.350 L
M ≈ 0.414 M
For such more questions on molarity
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1) For the following molecules: - Draw the Lewis structures/dots - Determine the polarity (polar or non-polar). - List all intermolecular forces. a) CF4 b) CH2Br2 c) H2CO3 d) N2 e) PCl3 f) XeF2 g) NH4
Answer:
ed
Explanation:
ed
Calculate the [H+] in a solution that has a pH or 5.21
Answer:
[H⁺] = 6.17×10¯⁶ M
Explanation:
From the question given above, the following data were obtained:
pH = 5.21
Concentration of Hydrogen ion [H⁺] =?
The pH of a solution is defined by the following equation:
pH = –Log [H⁺]
With the above formula, we can obtain the concentration of Hydrogen ion [H⁺] in the solution as follow:
pH = –Log [H⁺]
5.21 = –Log [H⁺]
Divide both side by –1
–5.21 = Log [H⁺]
Take the antilog of –5.21
[H⁺] = Antilog (–5.21)
[H⁺] = 6.17×10¯⁶ M
Therefore, the concentration of Hydrogen ion [H⁺] in the solution is 6.17×10¯⁶ M
Nahco3+hc2h3o2=nac2h3o2+h2co3
The equation NaHco3+hc2h3o2=nac2h3o2+h2co3 is already balanced.
Reaction information:
Nahcolite + Acetic Acid = Sodium Acetate + Carbonic Acid
Reactants:
Nahcolite - NaHCO3 :
Molar Mass, Oxidation State
Acetic Acid - HC2H3O2
Molar Mass, Oxidation State, Ethanoic Acid, Methanecarboxylic Acid, Ch3-Cooh, Acetic Acid; Glacial, etc
(NaHCO3 + HC2H3O2 = NaC2H3O2 + H2CO3)
The specific heat capacity of liquid water is 4.18 J/g oC. Calculate the quantity of energy required to heat 1.50 g of water from 26.5oC to 83.7oC. (Ignore significant figures for this problem.)
Answer: The quantity of heat required is 358.644 J.
Explanation:
Given: Specific heat capacity = [tex]4.18 J/g^{o}C[/tex]
Mass = 1.50 g
[tex]T_{1} = 26.5^{o}C[/tex]
[tex]T_{2} = 83.7^{o}C[/tex]
Formula used to calculate heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass
C = specific heat capacity
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 1.50 \times 4.18 J/g^{o}C \times (83.7 - 26.5)^{o}C\\= 358.644 J[/tex]
Thus, we can conclude that quantity of heat required is 358.644 J.
What is formed when a carboxylic acid and an amine combine? Give an example of the type of polymer that is formed by this reaction.
Answer:
The reaction between amines and carboxylic acids to form amides is biologically important. It is through this reaction that amino acids (molecules containing both amine and carboxylic acid substituents) link together in a polymer to form proteins.
ipt While they have different functions in adults, the limb bones of several organisms all arise from the same
set of cells in the embryo's body. How does this evidence support the theory of evolution?
O A. It suggests there is a common ancestor between all of the organisms.
OB. It says that the cells randomly mutate in order to produce the limbs.
O c. It provides evidence that says that all organisms are actually the same as embryos.
OD. It tells scientists that evolution has caused the limbs to be different in the adult form.
Answer:
c
Explanation:
Answer:
Explanation:
i cant seem to figure out ANY of these... help when you can pls :.)
can someone help me ASAP THIS IS IS A IMPORTANT GRADE
Answer:
A
Explanation:
There are three kinds of blood vessels: arteries, veins, and capillaries.
A. If the mass of Hydrogen is 1 amu, what is the mass of Hydrogen in the reactant side of the equation above?
B. what is the mass of Hydrogen on the product side of the equation above?
Answer:
there are 4 hydrogen so
A.the mass of Hydrogen in the reactant side of the equation above is 1×4=4 amu.
B.the mass of Hydrogen on the product side of the equation above =1×4=4 amu.
Note: mass of reactant =mass of product.
If 2.45 g of iron are placed in 1,5 L of 0.25M HCl, how many grams of FeCl2 are obtained? Identify the limiting and excess reactants in this single replacement reaction. Fe + 2HCl = FeCl2 + H2
Answer:
[tex]m_{FeCl_2}=0.652gFeCl_2[/tex]
Explanation:
Hello there!
In this case, according to the given information and the chemical reaction, whereby iron and hydrochloric acid react in a 1:2 mole ratio, it is firstly necessary to calculate the moles of iron (II) chloride from each reactant in order to figure out the limiting reactant:
[tex]n_{FeCl_2}=2.45gFe*\frac{1molFe}{55.845gFe}*\frac{1molFeCl_2}{1molFe}=0.0439molFeCl_2\\\\ n_{FeCl_2}=1.5L*0.25\frac{molHCl}{L} *\frac{1molHCl}{36.46gHCl}*\frac{1molFeCl_2}{2molHCl}=0.00514molFeCl_2[/tex]
In such a way, we infer the maximum moles of FeCl2 product are yielded by HCl, for which it is the limiting reactant. Finally, we calculate the grams of product by using its molar mass as shown below:
[tex]m_{FeCl_2}=0.00514molFeCl_2*\frac{126.75gFeCl_2}{1molFeCl_2} \\\\m_{FeCl_2}=0.652gFeCl_2[/tex]
Regards!
8. In order to find molarity, you must know what two things? *
Answer: - The moles of solute present in the solution.
- The volume of solution (in liters) containing the solute.
Explanation:
Combustion is an exothermic reaction where the reactants are combined with ____ to produce CO2 + H2O + ____
Answer:
The answer is oxygen gas.
Explain any three ways of protecting our water bodies
Answer:
Easy Things You Can Do To Protect Drinking Water Sources
Properly dispose of hazardous productsPut up signs. ...
Use and dispose of harmful materials properly. ...
Volunteer in your community. ...
Join in a beach, stream or wetland cleanup. ...
Prepare a presentation about your watershed for a school or civic organization. ...
Organize a storm drain stenciling project.
Explanation:
Which of the following metals will dissolve in ice water?
A. lead
B. sodium
C. zinc
D. nickel
Answer:
I think the answer would be sodium
Answer: B: Sodium
Explanation:
Sodium if one attempted to experiment this it will result in that sodium will react violently and be exothermic because that the evolve hydrogen immediately ignites fire (Also I'm sorry if this is all wrong and unhelpful)
Diamond is the hardest mineral according to Mohs Hardness Scale having a hardness scale reading of 1. True or false ? if you get it right ill make u brainliest also ill give all points !
A metal gas cylinder is heated from 181 K to 296 K. If the original pressure was 256 psi, what is the pressure after heating also in psi?
Answer:
419 psi
Explanation:
Assuming the gas behaves ideally, we can solve this problem by using Gay-Lussac's law, which states:
P₁T₂=P₂T₁Where subscript 1 stands for the initial conditions and 2 for the final ones, meaning that in this case:
P₁ = 256 psiT₂ = 296 KP₂ = ?T₁ = 181 KWe input the data:
256 psi * 296 K = P₂ * 181 KAnd solve for P₂:
P₂ = 419 psiCan someone please solve this question?? Is an element in group 3 likely to bond with an element from group 2?? Explain using the number of balance electrons from each element and the tot number of balance electrons needed to fill an about shell
Answer:
An atom with one or two valence electrons more than a closed shell The number of valence electrons of an element can be determined Groups 3-12 (transition metals), 2* (The 4s shell is complete and cannot hold any more electrons) in explaining the molecular structure of many organic compounds.
Explanation:
what is the mass spectrom
Answer:
Here's your Answer
Explanation:
the mass spectrum is the graphical representation of the ion abundance versus the mass to charge of the ions separated in mass spectrometer
K
50
40
-40
30
30
Tunnel
20
-20
10
10
0
What happens to particles as they approach the temperature shown?
A. They lose kinetic energy
B. They pick up speed.
C. They gain kinetic energy.
D. They heat up
SUB
Answer:
With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly.
Explanation:
1.. A saturatedsolutionA.contains more solute thansolvent.B.contains more solvent thansolute.C.contains equal moles of solute andsolvent.D.contains the maximum amount of solute that will dissolve in that solvent at that temperature.E.contains a solvent with only sigma bonds and no pi bonds (i.e. only single bonds, with no doubleor triplebonds).
Answer:
D. contains the maximum amount of solute that will dissolve in that solvent at that temperature.
Explanation:
Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.
For example, sodium chloride (NaCl) when mixed with water dissociates into sodium and chloride ions. Thus, salt (sodium chloride) is said to be soluble because it dissolves completely in water.
Hence, a compound that dissolves in water to produce an aqueous solution is said to be soluble in water. Also, the solute of an aqueous solution that conducts electricity is called an electrolyte.
In Chemistry, dissolution can be defined as the process of dissolving or dissociating a solute in solid, liquid or gaseous phase into fragmented particles by a solvent in order to form a solution. For dissolution to occur in solids, the crystalline structure of the substance must be broken up so as to release ions, atoms or molecules to produce a solution. For liquid and gases, the substance to be dissolved must form a non-covalent bond with the solvent to produce a solution.
Generally, a saturated solution contains the maximum amount of solute that will dissolve in that solvent at that temperature.
Which statement is true concerning colloids?
Answer:
Option D
Explanation:
The complete question is
Which statement is true concerning colloids?
A. It carries a net electric charge
B. It consists of one phase only
C. It can be made out of two gases
D. It is electrically neutral as a whole
Solution
The particles with in the colloids are either positively or negatively charged due to presence of molecular electrolyte. The charged particles do not cluster together due to repulsion force. However, these charged particles align along two different layers - one positive layer and the other negative layer.
The net charge reduces to zero because of two forces in equal amount due to presence of equal number of positive and negative charges
Hence, option D is correct
PLEASE HELP!! I'll give brainliest!! How are the different colors and designs generated in a firework?
I really need help
Explanation:
By using different chemcial reactions
Answer:
Color combinations are produced in the sky when various metal elements are heated, exciting electrons and releasing excess energy in the form of light. The color you see is determined by the chemicals that burn at different wavelengths of light in the spectrum. Higher energy compounds (e.g. copper chloride) emit colors like violet and blue and lower energy compounds (e.g. strontium chloride) emit colors like orange and red.
Explanation:
Please mark brainiest ✌
Charge q is 1 unit of distance away from the source charge S. Charge p is two times further away. The force exerted
between S and q is the force exerted between S and p.
O 1/2
O 2 times
O 1/4
O 4 times
Answer:1/4
Explanation:
A sample of aluminum requires 341 J of energy to raise the temperature from 18.0ºC to 55.0ºC. Calculate the mass of the aluminum sample.
Answer:
10.22g
Explanation:
Using the formula as follows:
Q = m × c × ∆T
Where;
Q = amount of heat required (J)
m = mass of substance (g)
c = specific heat of substance (J/g°C)
∆T = change in temperature (°C)
According to the information given in this question;
Q = 341J
m = ?
∆T = 55.0ºC - 18.0ºC = 37°C
c of aluminum = 0.902J/g°C
Using Q = m × c × ∆T
341 = m × 0.902 × 37
341 = 33.374m
m = 341 ÷ 33.374
m = 10.22g
1. What are the five symbiotic relationships?
2. What is mutualism? Explain mutualism with an example and a picture.
3. What is commensalism? Explain with an example and a picture.
4. What is predation? Explain with an example and a picture.
5. What is parasitism? Explain with an example and a picture.
6. What is competition? Explain with an example and a picture.
Write a CER paragraph (5- 8 complete sentences) answering the following prompt:
Why are symbiotic relationships important in an ecosystem?
Answer:
1) There are five main symbiotic relationships: mutualism, commensalism, predation, parasitism, and competition.
2) The term mutualism can be simply defined as a relationship in which both species are mutually benefited. This relationship can either be within the species or between the two different species. ... Here ants are the mutualist and acacia trees is the host. The acacia tree provides home and food for the ants.
3) Commensalism is a type of symbiotic relationship in which one species benefits, while the other species is neither harmed nor helped. The species that gains the benefit is called the commensal. ... An example is a golden jackal (the commensal) following a tiger (the host) to feed on leftovers from its kills.
4) Predation is the interaction between organisms in which one organism known as the predator kills another organism which is known as prey. ... Examples of predation are a lion eating deer or a snake eating rats. This results in the transfer of energy from the prey to the predator.
5) Parasitism is generally defined as a relationship between the two living species in which one organism is benefitted at the expense of the other. The organism that is benefitted is called the parasite, while the one that is harmed is called the host. A few examples of parasites are tapeworms, fleas, and barnacles.
6) Competition is a negative interaction that occurs among organisms whenever two or more organisms require the same limited resource. ... For example, animals require food (such as other organisms) and water, whereas plants require soil nutrients (for example, nitrogen), light, and water.
Symbiotic relationships are important because they are a major driving force of evolution. This networking and cooperation among species allows them to survive better than they would as individuals.
12. An electrolysis reaction is
A. hydrophobic.
B. spontaneous.
C. exothermic.
D. non-spontaneous.
Answer: D.) non-spontaneous.
Explanation:
