When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.
What is stoichiometry?Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change.
Let's consider the following balanced equation.
N₂ + 3 F₂ ⇒ 2 NF₃
To calculate the mass of NF₃ formed from 32.0 g of F₂, we need to consider the following relationships.
The molar mass of F₂ is 38.00 g/mol.The molar ratio of F₂ to NF₃ is 3:2.The molar mass of NF₃ is 71.00 g/mol.[tex]32.00gF_2 \frac{1molF_2}{38.00gF_2} \frac{2molNF_3}{3molF_2} \frac{71.00gNF_3}{1molNF_3} = 39.86gNF_3[/tex]
When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.
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which of the following is a cycloalkane?
Answer:
a
Explanation:
Answer:
cyclopentane cyclobutene cyclohexane cycloheptane
Which statement best describes a physical change? Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same. Changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same. Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same. Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.2
Ill give you brainliest
Explanation:
A physical change can not change the chemical makeup of a substance. If it did, it would be considered a chemical change. It can, however, be physically changed.
Drag each label to the correct location. Each label can be used more than once.
Match each statement with the two fields of Earth and space science it draws from. If you’re unsure, take a guess.
Answer: I DONT KNOW I guess
Explanation: HONESTLY WHAT ARE YOU TALKING ABOUT???????/
30. What would happen if the light bulb labeled Lamp B were removed?
Switch
Lamp A
Battery
Lamp B
Lamp C
a. Lamp A and C would still light up.
b. Lamp A and C would both go out.
C. Lamp A would not light, but lamp C would.
d. Lamp A would still light, but lamp C would not.
Answer:
The answer is B.
Explanation:
The answer is be because they are all sharing the circuit, therefore they would all go out.
The synthesis reaction to form boron hydride is: 2B(s) + 3H, (g) – B,H,(9) AH = +36 KJ.
What is the enthalpy value for the manipulated reaction: 1/2B, H,(9) - B(s) + 3/2H, (g)?
Answer:-18 KJ
Explanation:
The second reaction is obtained from the first when the first reaction is divided by 2 and reversed. The enthalpy change for the second reaction is -18 kJ.
What is enthalpy?The term enthalpy is defined as the heat absorbed or evolved in a reaction. It could be positive or negative.
If we look at the two reactions as shown in the question, we can see that the second reaction is obtained from the first when the first reaction is divided by 2 and reversed.
Hence, it the follows that the enthalpy change for the second reaction is -18 kJ.
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helppppppppppppppppppp
Answer:
a. brightness of light
b. the light intensity on the sensor goes below 100( reduces)
what are the steps to measure the density of a solid?
Answer:
Look below
Explanation:
The formula for density is:
[tex]Density=\frac{mass}{volume}[/tex]
Therefore in order to find the density of a solid, you must find the mass and the volume first.
To find the mass, you can use a scale.
To find the volume, you can use the water displacement method. For example, if you fill the water of a graduated cylinder to 10 mL, and then you put a rock inside, and it rises to 15 mL, then the volume (of the rock) is 15mL-10mL=5mL.
Why was the measurement unit for metal content in Experiments 1 and 2 different? In Experiment 1:
To identify why a metal measurement was different in the experiments look for the variable that was different in the experiment and analyze how this change affected the results.
What is an experiment?An experiment is a procedure that aims at probing or discovering something. For example, you can test if a plant grows faster/slower by using an experiment.
What causes different results in similar experiments?The most common cause for this situation is that one of the factors or variables is slightly different. For example, if I add 50mL of water to a plant rather than 20mL of water every day this might cause different results.
Based on this, if the metal content was different you should analyze if any of the factors changed in this experiment and find out how this change affected the general results.
Note: This question is incomplete because there is limited information about the experiment; due to this, I answered it based on general knowledge.
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Al +
O2 -
->
AlO3
Balancing chemical equations
Answer:
Aluminium + Dioxygen = Ruby
Reaction Type
Synthesis
Redox (Oxidation-Reduction) Reaction Beta
Al + O2 = Al2O3 might be a redox reaction.
Reactants
Aluminium - Al
13Al Aluminum Element 13
Dioxygen - O2
Lox O₂ Oxygen Oxygen Gas Liquid Oxygen Triplet Oxygen Diatomic Oxygen Molecular Oxygen O2 Bond Polarity
Products
Ruby - Al2O3
Al2O3 Molar Mass Al2O3 Oxidation Number
Exothermic or Endothermic?
Al(s) 4 mol 0 kJ/mol 0 kJ
O2(g) 3 mol 0 kJ/mol 0 kJ
Al2O3(s) 2 mol -1669.8 kJ/mol -3339.6 kJ
ΔH°rxn -3339.6 kJ
ΣΔH°f(reactants) > ΣΔH°f(products), so the reaction is exothermic.
Explanation:
Determine the number of Mg2+ and PO3−4 ions required to form a neutral ionic compound. Cations and anions
Answer:
Mg₃(PO₄)₂
Explanation:
Note: The phosphate ion is PO₄³⁻
3Mg⁺² + 2PO₄³⁻ => Mg₃(PO₄)₂
The number of Mg⁺² and PO₄³⁻ ions required to form a neutral ionic compound is:
The number cation, Mg⁺² required is 3The number of anion, PO₄³⁻ required is 2What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to determine the number of cations and anionsTo determine the number of cations and anions, needed to produced a neutral compound, we shall write balanced equation. This is illustrated below:
3Mg⁺² + 2PO₄³⁻ --> Mg₃(PO₄)₂
From the balanced equation above, we obtained the following:
The number cation, Mg⁺² required is 3The number of anion, PO₄³⁻ required is 2Learn more about chemical equation:
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please help!
The amount of available energy decreases with each step up the energy pyramid. How is this related to the fact that there are so many more producers than consumers on Earth?
Answer:
The energy decreases as you move from the bottom to the top of the energy pyramid. 90% of the energy entering each step of the pyramid is used up by the consumers, only 10% of the energy get stored. So, when the next level on the pyramid eats them, that 10% gets passed down to them Use the diagram below to answer the question.
Explanation:
I am sorry if I am wrong
And can you give me brainliest please
I just joined today
How many grams of O2 are needed to completely burn 69.3g C3H8?
Answer:
C3H8 + 5O2 --> 3CO2 +4H2O
no.of moles of C3H8=64.3/(3*12+8) =1.461363636moles
no.of moles of O2=1.461363636*5 =7.306818moles
mass of O2= 7.306818*(16*2)=233.81g
Explanation:
What is an electromagnetic wave?
Answer:
An electromagnetic wave is a wave that is created as a result of vibrations between an electric field and a magnetic field.
Explanation:
Hope this helps!!
What ion causes hardness of water?
Answer:
calcium ions
Explanation:
Water hardness is due to the presence of calcium ions, and to a lesser extent, magnesium, iron, and manganese.
In chemistry, densities of substances are often compared to the density of this substance
Answer:
Density of Water
Explanation:
1) What is the atis of 0.367 moles of CaCI?
A) 40.7 g
B) 111 g
C) 0.033 g
D) 246 B
What is the mass of 7.10 x 10^22 molecules of SO3?
Answer:
it is 80.06 g/mol
Explanation:
A recipe for candy requires that the liquid ingredients be stirred constantly until the liquid reaches a temperature of 140°C. What type of spoon – wood or metal – will prevent burns to a person’s hand while stirring the hot liquid? Explain your choice.
PLEASE HURRY
Answer:
Wood
Explanation:
Wood because the heat would not be able to travel to the hand to burn it unlike the metal
What is the total number of potassium atoms of this chemical equation? 2CrCO6s+4KOHaq→KHCr2CO10aq+K2CO3aq+KHCOOaq+H2Ol
Answer:
4
Explanation:
...................
calculate it. (its for my mom birthday gift trust me)
Answer:
25%
Explanation:
Your formula is wrong the bottom part is mass of it all so add solution to solute.
Show and explain the stereoisomerism exist in the compound.
(Please answer this i need to submit my assignment before the dateline)
Answer:
There are chiral centers on the molecule thus making it a molecule with stereoisomers.
Explanation:
Stereoisomerism is defined: a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space.
The easiest way to see if this definition is true for any molecule is to see if there are any chiral centers / asymmetric centers. To do this, you would need to look for an sp3 hybridized (tetrahedral) carbon on the molecule with four different groups attached to it. For example, the C in -CH3 would not be a chiral center as there are 3 of the same H's attached to it.
On the given molecule there are 4 chiral centers which makes it a chiral molecule and thus a stereoisomer. Any molecule with one or more chiral centers has stereoisomerism. In this molecule it is easy to see as the chiral centers are the carbons with the wedges and dashes bonded to them indicating the 3D orientation of the constituents. With dashes denoting into page toward the back, and wedges denoting out of the page toward you.
Calculate the concentrations of all species in a 1.17 M NaCH3COO (sodium acetate) solution. The ionization constant for acetic acid is a=1.8×10−5 .
The concentrations of all species in a 1.17 M NaCH3COO solution is mathematically given as
[Na+] = 1.17 M
[OH-] = 0.00002559 M
[H3O+] = 3.51 x 10-10 M
[CH3COO-] = 1.17 M
[CH3COOH] = 0.00002559 M
What are the concentrations of all species in a 1.17 M NaCH3COO (sodium acetate) solution.?Question Parameters:
1.17 M NaCH3COO (sodium acetate) solution
The ionization constant for acetic acid is a=1.8×10−5.
Generally, the equation for the Chemical Reaction is mathematically given as
NaCH2COO - +H20---><--- CH3COOH+OH-
Therefore
[tex]Ka=\frac{cH3COOH(OH)}{CH2OO-}[/tex]
[tex]5.6*10^{-10}=\frac{*x*x}{1.17m-x}[/tex]
x=0.00002559
In conclusion,
Since other species are given by either for x=0.00002559 or the ionization constant
For[CH3COO-]
[CH3COO-]=1.17-0.00002559
[CH3COO-]=1.167m
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what is a forensic paleontologist?
dum it down for me
Answer:
the use of paleontology as a scientific tool
Explanation:
Answer: A forensic paleontologist is a scientist who uses their knowledge of fossils and ancient remains to help solve crimes and investigate mysteries. They apply principles from paleontology, the study of ancient life, to analyze evidence found at crime scenes or archaeological sites.
given nitrogen 1 oxide and oxygen how can one differenciate the two
Answer:
Nitrogen has an atomic number of seven, while the atomic number of oxygen is eight. That means nitrogen has seven protons in the nucleus of each atom, as well as seven electrons surrounding the nucleus. Oxygen has eight protons and electrons. Atoms combine with one another to form molecules.
What is the central idea illustrated in the 4 sets of pictures above
You can also answer the 4 pics 1 word if you'd like.
Answer:
Battery
Explanation:
Because it has a negative and positive sign
If 70 mL of a 0.4 M Ba(NO3)2 solution is mixed with excess amount of a Na2CO3 solution, what is the theoretical yield of the precipitate
The theoretical yield of BaCO3 is 5.5
What is theoretical yield?The theoretical yield is the yield calculated from the stoichiometry of the reaction. The equation of the reaction is;
Ba(NO3)2(aq) + Na2CO3 (aq) ------> BaCO3(s) + 2NaNO3(aq)
Number of moles of limiting reactant: 0.4 M × 70/1000 = 0.028 moles
Since the reaction is 1:1,om;y 1 mole of BaCO3 is formed. Hence, mass of BaCO3 = 0.028 moles × 197 g/mol = 5.5g
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Several distinct changes take place in the body after a person dies; which one can tell us MOST about whether the corpse was moved?
1. rigor mortis
2. livor mortis
3. algor mortis
4. putrefaction
Answer:
2. Livor Mortis.
Explanation:
The tannish markings standing out from the red markings helps to show if they have been moved from where they orginially had been laying.
Which of the following non-mineral nutrients is only needed in small doses?
potassium
zinc
calcium
nitrogen
Answer:
Explanation:
Nitrogen is a non-mineral
The other 3 are minerals.
So the answer is Nitrogen
Answer:
nitrogen is a non mineral
A 95.0 g sample of copper (Cp = 0.20 J/°C·g) is heated to 82.4°C and then placed in a container of water (Cp= 4.18 J/°C·g) at 22.0°C. The final temperature of the water and the copper is 25.1°C. What was the mass of the water in the original container? Assume that all heat lost by the copper is gained by the water.
(C:) 84.0 g H2 O
Its the right answer
The mass of the water in the original container by assuming that all heat lost by the copper is gained by the water is 116.23 g.
What is mass?Mass is the term that told the quantity of a matter.
Given the mass of copper = 110g
The specific heat capacity of copper is 0.20 j/C g
The initial temperature of copper is 82.4 C
The final temperature of copper and water is 24.9 C
Now, we would determine the mass of the water.
From the formula for sensible heat, ΔH = m × c × ΔT
Where, H = sensed heat,
m = mass,
ΔT = temperature change
Putting the above values in the equation.
ΔH = m × c × ΔT
110 × 0.20 × ( 82.4 - 24.9 ) = mw × 4.186 × (24.9 - 22.3)
1265 J = mw × 10.8836 or mw = 116.23 g
Thus, the mass of water is 116.23 g.
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How many moles of water are produced from the combustion of 42,0
grams of methane, CH?
CH4+O2 =
CO2 + H2O
[tex]\underline{\underline{\large\bf{Given:-}}}[/tex]
[tex]\red{\leadsto}\:[/tex][tex]\textsf{Amount of Methane,} [/tex][tex]\sf CH_4 = 42\:grams [/tex]
[tex]\underline{\underline{\large\bf{To Find:-}}}[/tex]
[tex]\orange{\leadsto}\:[/tex][tex]\textsf{Moles of water produced from reaction } [/tex][tex]\sf [/tex]
[tex]\\[/tex]
[tex]\underline{\underline{\large\bf{Solution:-}}}\\[/tex]
[tex]\sf Molar \:mass \:of \: CH_4 :- [/tex][tex]\sf \implies 1\times (atomic \: mass \:of \:Carbon )+ 4\times [/tex]
[tex]\sf (atomic\:mass \: of \: hydrogen)[/tex]
[tex]\sf \implies 1 \times 12+ 4\times 1 [/tex]
[tex]\sf \implies 16 grams [/tex]
[tex]\green{ \underline { \boxed{ \sf{Moles \: of \: CH_4= \frac{Amount \:of \: CH_4}{Molar \: mass \: of \:CH_4} }}}}[/tex]
[tex]\begin{gathered}\\\implies\quad \sf \frac{42}{16} \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf 2.625 moles \\\end{gathered} [/tex]
The balanced reaction for combustion of methane is-
[tex]\green{ \underline { \boxed{ \sf{CH_4+2O_2 \longrightarrow CO_2+2H_2O}}}}[/tex]
By observation-
[tex]\longrightarrow[/tex]Water produced by 1 mole of methane = 2 moles
[tex]\longrightarrow[/tex]Water produced by 2.625 mole of methane = 2 × 2.625
[tex]\quad\implies[/tex] 5.250 moles
