Answer:
the energy of the products is less than the energy of the reactants.
Explanation:
the the change is enthalpy is negative, and heat is released to the surroundings.
What is the percent composition of phosphorus in the compound P3CI8
Answer:
24.68%
Explanation:
Molar mass of phosphorous / molar mass of P3Cl8
= 3 x 30.97 / (3 x 30.97) + (8 x 35.45)
= 92.91/376.51 x 100
= 24.676%
=24.68% (2dp)
Urgent: Suppose that 14.9 mL of HNO3 is neutralized by 53.1 mL of a 0.0048 M solution of KOH in a titration. Calculate the concentration of the HNO3 solution.
Answer:
0.017 M
Explanation:
The reaction that takes place is:
HNO₃ + KOH → KNO₃ + H₂OFirst we calculate how many KOH moles reacted, using the given volume and concentration:
53.1 mL * 0.0048 M = 0.255 mmolAs 1 mmol of KOH reacts completely with 1 mmol of HNO₃, in 14.9 mL of the HNO₃ solution there were 0.255 HNO₃ mmoles.
With that in mind we can calculate the concentration of the HNO₃ solution using the calculated number of moles and given volume:
0.255 mmol / 14.9 mL = 0.017 MWhich index fossil in sedimentary surface bedrock most likely indicates that a marine
environment once existed in the region where the sediments were deposited?
Answer:
Which index fossil in sedimentary surface bedrock most likely indicates that a marine environment once existed in the region where the sediments were deposited? The timeline below represents the entire geologic history of Earth. The lettered dots on the timeline represent events in Earth's history.
Explanation:
Plz mark me as a brainlist
Use the earthquake distribution map and what you know about boundaries to answer the question
What volume will 106.476 g N, gas at STP occupy?
O 85.1808L
O 170.362L
O 7.60543L
0 3.80271L
Answer:
170.362 L
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesGas Laws
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
Identify variables
[Given] 106.476 g N
[Solve] L N
Step 2: Identify Conversions
[STP] 1 mol = 22.4 L
[PT] Molar Mass of N: 14.01 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 106.476 \ g \ N(\frac{1 \ mol \ N}{14.01 \ g \ N})(\frac{22.4 \ L \ N}{1 \ mol \ N})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 170.24 \ L \ N[/tex]what is the hydronium ion concentration ion of a solution with a poH of 7.20
Answer:
10^-7.20 or 1×10^-7.20mol.dm^-3
Explanation:
[H3O^+]= -log[H3O^+]
=antilog(-pH)
=antilog(-7.20)
=10^-7.20 mol.dm^-3
Answer:
1.58 x 10^-7 M
Explanation:
Reset the simulation again. Set the ruler at 50 and the left platform at 20. Don't add any molecules yet. Predict what will happen when you add 30 molecules of substance A. Why do you think this will happen?
Answer:
The conversion of substance A to substance B will happen extremely slowly because of the very high activation energy that each molecule must obtain to convert.
Explanation:
Plato answer
The conversion of substance A to substance B will happen extremely slowly.
What are molecules?A molecule is two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance.
The conversion of substance A to substance B will happen extremely slowly because of the very high activation energy that each molecule must obtain to convert.
Learn more about the molecules here:
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A student tests a solid sample of a compound and determines that it does not conduct electric
current. When the
compound is dissolved in water, the solution does conduct electric current
What type of bonding does the compound have?
a.non polar covalent
b.ionic
c.polar covalent
d.metallic
Answer:
A
Explanation:
because they are non polar so would not conduct electricity :)
The type of bonding does the compound have non polar covalent.
What is non polar covalent?A non-polar covalent bond is just a sort of chemical bond that occurs when two atoms share electrons evenly. As a result, the count of electrons shared by neighboring atoms in an atom would be identical.
What is compound?A compound would be a material made up of two or maybe more chemical elements that have been chemically bonded together.
They still wouldn't conduct electricity even though they can non-polar.
Therefore, the correct answer will be option (A).
To know more about compound and non-polar compound.
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how many atoms of zirconium are in the molecule of zirconium sulfide
Answer:
1 atom of zirconium
Explanation:
Zirconium sulfide or zirconium disulphide can be written as ZrS2.
1. The space shuttle used two solid rocket boosters to launch it into space. The reaction that occurred is
written below:
NH4ClO4(s) + Al(s) --> NO(g) + Al2O3(s) + H2O(g) + AlCl3(g)
A. Balance the reaction and rewrite.
B. How many grams of aluminum would be needed to react with 56 kg of ammonium
perchlorate?
C. If 67 grams of ammonium perchlorate were to react with 10 grams of aluminum:
a. Which material would be the limiting reactant?
b. What would be the theoretical yield of nitrogen monoxide?
D. Was the aluminum oxidized or reduced in the reaction?
Show work
Answer:
C. If 67 grams of ammonium perchlorate were to react with 10 grams of aluminum:
Explanation:
67 grams of ammonium because H2O(g) + AlCl3(g)
Which two activities are practical applications of magnetism?
Answer:
Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.
Explanation:
Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.
An Element X has been discovered. Element X forms an Xt ion and
G9 EOT3 2020-
has an atomic number of 11. The X* ion of Element X forms a bond
with CI.
1-3
5.00
11
Na
Mg
3
22.99
19
24.10
20
21
K
Ca
Sc
19.10
400
19
Rb
Sr
Y
NOT
R$ 47
53
N7
so
CS
Ba
3.71
112.91
117 11
Ra
malleable and co
malene bi
Answer: The chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]
Explanation:
An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).
The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.
Element X has the atomic number 11 which is sodium. The electronic configuration of it is [tex]1s^22s^22p^63s^1[/tex]
This element will lose 1 electron to form [tex]X^+[/tex] ion of [tex]Na^+[/tex]
Chlorine has the atomic number 17. The electronic configuration of it is [tex]1s^22s^22p^63s^23p^5[/tex]
This element will gain 1 electron to form [tex]Cl^-[/tex] ion
When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of [tex]XCl[/tex] or [tex]NaCl[/tex]
Hence, the chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]
How many Carbon Atoms are there on the PRODUCT SIDE
Answer: There are 6 carbon atoms on the product side.
Explanation:
The given reaction equation is as follows.
[tex]6CO_{2} + 6H_{2}O \rightarrow C_{6}H_{12}O_{6} + 6O_{2}[/tex]
Species present on the left side of an arrow in a chemical equation depicts the reactants.
Species present on the right side of an arrow in a chemical equation depicts the products.
Hence, products in the given reaction equation are [tex]C_{6}H_{12}O_{6}[/tex] and [tex]6O_{2}[/tex].
Therefore, there are 6 carbon atoms present on the product side.
Thus, we can conclude that there are 6 carbon atoms on the product side.
Which sentence is a scientific statement?
A. The sun is constantly emitting undetectable waves.
B. Instrumental music sounds better than choral music.
C. Studying science is more important than studying art.
D. Pure water is better than sugar water for plant growth.
Answer:d
Explanation:
obv
when monomers are joined together, what do they form?
The monomers combine with each other via covalent bonds to form larger molecules known as polymers. In doing so, monomers release water molecules as byproducts.
Your friend realized that they have no more money left to pay their debts (money owed). What would you say to your friend to console them and to give them advice. Write 2 things you would say.
Answer:
to get a job and why does she not have money
Explanation:
Have a nice day :)
Write the net ionic equation. Don't worry about identifying the state of matter. 2 NH4Cl (aq) + 1 Mg(OH)=2NH3 (g) + 2H2O (l) + 1 MgCl2 (aq)
Answer:
2NH4^+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l)
Explanation:
Molecular balanced reaction equation;
2NH4Cl (aq) + Mg(OH)2---->2NH3 (g) + 2H2O (l) + MgCl2 (aq)
Complete ionic reaction equation;
2NH4^+(aq) + 2Cl^-(aq) + Mg^2+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l) + Mg^2+(aq) + 2Cl^-(aq)
Net Ionic reaction equation;
2NH4^+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l)
what is the average weather condition in a place over a long period of time?
How many grams of ammonia (NH3) can be produced by the synthesis of excess hydrogen gas (H2) and 253.8 grams of nitrogen gas (N2) in a synthesis reaction?
Answer:
308.2 g of NH₃.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
3H₂ + N₂ —> 2NH₃
Next, we shall determine the mass of N₂ that reacted and the mass of NH₃ produced from the balanced equation. This can be obtained as follow:
Molar mass of N₂ = 2 × 14 = 28 g/mol
Mass of N₂ from the balanced equation = 1 × 28 = 28 g
Molar mass of NH₃ = 14 + (3×1)
= 14 + 3 = 17 g/mol
Mass of NH₃ from the balanced equation = 2 × 17 = 34 g
Summary:
From the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃.
Finally, we shall determine the mass of NH₃ produced by the reaction of 253.8 g of N₂. This can be obtained as illustrated below:
From the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃.
Therefore, 253.8 g of N₂ will react to produce = (253.8 × 34)/28 = 308.2 g of NH₃.
Thus, 308.2 g of NH₃ were obtained from the reaction.
If [H3O^ + ]=1.7*10^ -3 M what is the pOH of the solution?
Answer:
The pOH of the solution is 11.23.
Explanation:
To solve this problem, we must remember the following formula for pH: pH = -log[H+].
If we plug in the value we are given, we can find the pH.
pH = -log[H+]
pH = -log(1.7*10^-3)
pH = 2.77
To find the pOH, we use the following formula:
pH + pOH = 14
To solve, we should plug in the value we found above for pH and solve for the pOH.
2.77 + pOH = 14
pOH = 11.23
Therefore, the correct answer is 11.23.
Hope this helps!
For an ideal gas, evaluate the volume occupied by 0.3 mole of gas.
Answer:
V=0.3×22.4=6.72 liters hope this helps
please explain what a ecosystem is.
Explanation:
An ecosystem includes the environment, living and non-living things and how they interact with each other.
For example, in a Reef ecosystem there
are marine plants and animals that depend on each other and their surrounding to survive.
Loud speaker A vibrates 200 times each second. Loud speaker B vibrates 400 times each second.a)What is the frequency of the sound produced by Loud speaker A ? Give the value and unit.
b)Which loudspeaker produces higher frequency of vibrations?
(Show calculations)
Answer:
For a: The frequency produced by loudspeaker A is 200 Hz
For b: Loudspeaker B produces a higher frequency of vibrations.
Explanation:
To calculate the frequency of a loudspeaker, we use the formula:
[tex]\nu=\frac{\text{Number of vibrations}}{\text{Time period}}[/tex] ......(1)
where,
[tex]\nu[/tex] = frequency
For loudspeaker A:Number of vibrations = 200
Time period = 1 second
Putting values in equation 1:
[tex]\nu_A=\frac{200}{1s}=200Hz[/tex]
For loudspeaker B:Number of vibrations = 400
Time period = 1 second
Putting values in equation 1:
[tex]\nu_B=\frac{400}{1s}=400Hz[/tex]
Hence, the frequency produced by loudspeaker A is 200 Hz and loudspeaker B produces a higher frequency of vibrations.
Una masa de aire ocupa un volumen de5litro a una temperatura de 120c Cual será el nuevo volumen si la temperatura se reduce ala mitad. Un gas ideal ocupa un volumen de 4000ml a una presión absoluta de 1500 kilo pascal Cual será la presión si el gas es comprimido lentamente hasta 750 kilo pascal a temperatura constante? Un gas ocupa un volumen de 200 litros a 95c y 782mmHg Cual será el volumen ocupado por dicho gas a 65cyn815mmHg
Answer:
1. [tex]V_2=2.5L[/tex]
2. [tex]V_2=8000mL[/tex]
3. [tex]V_2=176.3L[/tex]
Explanation:
¡Hola!
En este caso, dada la información para estos problemas, procedemos de la siguiente manera, basado en las leyes de los gases ideales:
1. Una masa de aire ocupa un volumen de 5 litros a una temperatura de 120 °C Cual será el nuevo volumen si la temperatura se reduce a la mitad:
Aqui, utilizamos la ley de Charles, asegurándonos que la temperatura está en Kelvin:
[tex]\frac{T_2}{V_2} =\frac{T_1}{V_1} \\\\V_2 =\frac{V_1T_2}{T_1} \\\\V_2 =\frac{5L*196.5K}{393K} \\\\V_2=2.5L[/tex]
2. Un gas ideal ocupa un volumen de 4000 ml a una presión absoluta de 1500 kilo pascal Cual será la presión si el gas es comprimido lentamente hasta 750 kilo pascal a temperatura constante?
Aquí, utilizamos la ley de Boyle, dado que la temperatura se mantiene constante, calculando el volumen, ya que lo que se da es la presión final:
[tex]\neq P_2V_2=P_1V_1\\\\V_2=\frac{P_1V_1}{P_2}\\\\ V_2=\frac{4000mL*1500kPa}{750kPa}\\\\V_2=8000mL[/tex]
3. Un gas ocupa un volumen de 200 litros a 95°C y 782 mmHg Cual será el volumen ocupado por dicho gas a 65°C y 815 mmHg:
Aquí, utilizamos la ley combinada de los gases ideales, asegurándonos que las temperaturas están en Kelvin:
[tex]\frac{T_2}{P_2V_2} =\frac{T_1}{P_1V_1} \\\\V_2 =\frac{P_1V_1T_2}{P_2T_1} \\\\V_2 =\frac{782mmHg*200L*338K}{815mmHg*368K}\\\\V_2=176.3L[/tex]
¡Saludos!
Which element has their valence electron farthest from the nucleus?
K (Potassium)
Li (Lithium)
Na (Sodium)
Rb (Rubidium)
What is the oxidation state of each element in the compound CaSO4?
What is most likely to happen when two fluorine (F) atoms bond?
A: Electrons will be equally attracted to. both atoms.
B: One atom will attract electrons more strongly
than the other.
help asap please
How many liters of water is needed to make .340 M using 6.4 moles of Cu(OH)2?
Answer:
here, i think this helps
https://www.crestwoodschools.org/userfiles/867/Classes/9260/Moles%20Worksheet.pdf
Na + Cl --> NaCl
If you were given 15 grams of sodium (with excess chlorine) and asked to determine the amount of NaCl that would be produced (in grams), how would you go about doing it. Be as specific as possible and include numerical values when necessary.
Answer:
38.152 g NaCl would be produced.
Explanation:
[tex] \frac{(23 + 35.5) \times 15}{23} \\ = 38.152 \: \: g[/tex]
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Answer:
38.152 g NaCl would be produced.
Explanation:
\begin{gathered} \frac{(23 + 35.5) \times 15}{23} \\ = 38.152 \: \: g\end{gathered}
23
(23+35.5)×15
hope it is helpful to you
=38.152g
N is another unit for mass True or False
