Answers
Answer:
The electronegative of two atoms are not equal.
Explanation:
Related Questions
QUESTION 18 What is the volume in dm³ of 5.5 grams carbon dioxide (CO₂) at room temperature and pressure (r.t.p)? Given the atomic masses, C= 12 and O = 16
Answers
The volume of 5.5 grams of carbon dioxide (CO2) at room temperature and pressure is approximately 2.42 dm³.
To calculate the volume of carbon dioxide (CO2) at room temperature and pressure (r.t.p), we can use the ideal gas law equation:
PV = nRT
Where:
P is the pressure
V is the volume
n is the number of moles
R is the ideal gas constant
T is the temperature
At r.t.p, the pressure is typically considered to be 1 atmosphere (atm) or 101.325 kilopascals (kPa). The temperature is approximately 298 Kelvin (K), which is equivalent to 25 degrees Celsius (°C).
First, we need to calculate the number of moles of carbon dioxide (CO2) using its mass and molar mass.
The molar mass of CO2 is calculated by adding the atomic masses of carbon (C) and two oxygen (O) atoms:
Molar mass of CO2 = (12.01 g/mol) + 2*(16.00 g/mol) = 44.01 g/mol
Now, we can calculate the number of moles using the given mass of 5.5 grams:
n = mass / molar mass = 5.5 g / 44.01 g/mol ≈ 0.125 mol
Next, we can rearrange the ideal gas law equation to solve for volume (V):
V = (nRT) / P
Substituting the known values into the equation:
V = (0.125 mol * 0.0821 L·atm/mol·K * 298 K) / 1 atm
V ≈ 2.42 dm³
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If you are given 96.0 grams of O2, how many grams of H20 are made?
Answers
Answer:
10.66 grams
Explanation:
Two liquids, A and B, have equal masses and equal initial temperatures. Each is heated for the same length of time over identical burners. Afterward, liquid A is hotter than liquid B. Which has the larger specific heat? Two liquids, A and B, have equal masses and equal initial temperatures. Each is heated for the same length of time over identical burners. Afterward, liquid A is hotter than liquid B. Which has the larger specific heat? Liquid A. There's not enough information to tell. Liquid B.
Answers
Answer:
Liquid A.
Explanation:
Specific heat is defined as the amount of heat required per unit of mass to raise the temperature by one degree celsius.
When two liquids are heated, the liquid with larger specific heat is the one which is hotter. That is because is required more energy to decrease its temperature by 1°C.
Thus, in the problem, liquid A has the larger specific heat
In the previous steps, you determined:
pre-1982 pennies contribute 1.24 g to the
overall mass
post-1982 pennies contribute 1.50 g to
the overall mass
The overall weighted average mass comes
from combining the mass contributions
from each type of penny. Add the masses
from the previous steps together to get the
overall weighted average mass.
Weighted Average -
Pre-1982 Contribution + Post-1982
Contribution
What is the weighted average mass of a
penny from this sample?
Enter
Answers
Answer:
2.74
Explanation:
Okay, let's go through the previous steps:
Pre-1982 pennies contribute 1.24 g to the overall mass
Post-1982 pennies contribute 1.50 g to the overall mass
To calculate the weighted average mass, I'll add these contributions together:
Pre-1982 contribution: 1.24 g
Post-1982 contribution: 1.50 g
Total weighted average mass = 1.24 g + 1.50 g = 2.74 g
Strontium hydroxide reacts with hydrobromic acid to produce Strontium bromide and
water.
Write and balance the chemical reaction above, use it for problems 1-4 below:
1. If 5.50 moles of strontium hydroxide were consumed, how much moles of water are
produced?
2. Find the mass of hydrobromic acid used to produce 7.50 moles water.
3. If 10.8 g of strontium hydroxide were used, how much moles of strontium bromide are
produced?
4. If 13.3 g of hydrobromic acid were consumed, find the mass of the water produced.
Answers
Sr(OH)2 + 2 HCl --> SrCl2 + 2 H2O
To find the moles of water produced when 5.50 moles of strontium hydroxide are consumed, we need to apply the law of conservation of mass. The mass of water produced is equal to the mass of strontium hydroxide consumed. Since strontium hydroxide has a molar mass of 142 g/mol and water has a molar mass of 18 g/mol, 1 mol of strontium hydroxide can produce 9 mol of water. Therefore, 5.50 moles of strontium hydroxide can produce 49.5 mol of water.
Similarly, 7.50 moles of water can be produced by reacting 18 moles of hydrobromic acid with strontium hydroxide. Hydrobromic acid has a molar mass of 79.9 g/mol, so 18 moles of hydrobromic acid would have a mass of 79.9 * 18 = 1435.2 g.
To find the moles of strontium bromide produced when 10.8 g of strontium hydroxide is used, we need to apply the law of conservation of mass again. The mass of the strontium bromide produced is equal to the mass of strontium hydroxide consumed. Since strontium bromide has a molar mass of 410 g/mol and strontium hydroxide has a molar mass of 142 g/mol, 1 mol of strontium bromide can consume 3.23 moles of strontium hydroxide. Therefore, 10.8 g of strontium hydroxide can produce 10.8 / 3.23 = 3.34 moles of strontium bromide.
Finally, to find the mass of water produced when 13.3 g of hydrobromic acid is consumed, we need to apply the law of conservation of mass yet again. The mass of the water produced is equal to the mass of hydrobromic acid consumed. Since hydrobromic acid has a molar mass of 79.9 g/mol, 13.3 g of hydrobromic acid would produce 13.3 / 79.9 = 0.166 moles of water.
A group of tissues that work together to perform a specific function is called
a. a cell
b. an organ
c. a system
d. an organism
Answers
Answer:
B. Organ.
Explanation:
College Biology Major here.
2. Which of these is an extensive property?
a. Density
b. Melting point
Temperature
d. Volume
Answers
Volume ..........is the answer
Which two equations represent double-replacement reactions?
Answers
Answer: A and D, I believe
Explanation:
Answer:
A and D
Explanation:
did the test !
In which case are the white balls the maximum distance, and the maximum angle apart?
Answers
The maximum distance between the two white balls is 2R, and the maximum angle between them is 180 degrees (or π radians).
How to solveMaximum distance between the balls:
The maximum distance between the two white balls will be achieved when they are placed at opposite ends of a diameter of the circular region.
In this case, the distance between them will be equal to the diameter of the circle, which is 2R.
Maximum angle between the balls:
To find the maximum angle between the two balls, imagine the center of the circle as the vertex of the angle, and the positions of the two balls as the endpoints of the angle's two sides.
Since the balls are located at opposite ends of a diameter, the angle formed will be a straight angle, which is 180 degrees (or π radians).
So, the maximum distance between the two white balls is 2R, and the maximum angle between them is 180 degrees (or π radians).
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Two white balls, A and B, are placed on a flat surface inside a circular region of radius R. What is the maximum distance and maximum angle between the balls that can be achieved
How many molecules are there in a 42.3g sample of water
Answers
Answer:
This means that one mole of water molecules has a mass of 18.015g.
42.3g * 1 mole H2O/18.015g
= 2.3480 moles H2O
We are using the avogadros number to find the number of molecules of water
2.3480 H2O * 6.022*10^ 23moles/ 1mole of H2O
That's 2.3480 multiplied by 6.022*10^23 divided by 1 mole of H2O
Number of molecules = 1.4140 *10^24 molecules
Use this formula for the following questions: 3CaCl2
Underline the coefficient and circle the subscript.
How many calcium atoms?
How many total atoms in the formula?
Answers
1. The number of atoms of calcium in the compound is 1.806×10²⁴ atoms
2. The total atoms in the formula is 1.806×10²⁴ atoms
1. How do i determine the number of atoms?The number of atoms in the compound can be obtained as follow:
Formula of compound = 3CaCl₂Number of mole of Ca = 3 molesNumber of atoms =?1 mole of Ca = 6.02×10²³ atoms
Therefore,
3 moles of Ca = (3 moles × 6.02×10²³ atoms) / 1 mole
3 moles of Ca = 1.806×10²⁴ atoms
Thus, the number of atoms of calcium is 1.806×10²⁴ atoms
2. How do i determine the total atoms?The total atoms in the compound can be obtained as follow:
Formula of compound = 3CaCl₂Number of mole of compound = 3 molesTotal atoms =?1 mole of CaCl₂ = 6.02×10²³ atoms
Therefore,
3 moles of CaCl₂ = (3 moles × 6.02×10²³ atoms) / 1 mole
3 moles of CaCl₂ = 1.806×10²⁴ atoms
Thus, the total atoms is 1.806×10²⁴ atoms
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which of the following would you choose if you are to prepare a heterogeneus mixture...
help now need ans in modul
Answers
Answer:
can u give us the option
Explanation:
please there is n9 any option to choose to prepare heterogeneous mixture but randomly water and oil
Two asteroids are 75,000 m apart one has a mass of 8 x 10^7 N what is the mass of the other asteroid
Answers
The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg
To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:
F = (G * m1 * m2) / \(r^{2}\)
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.
Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):
1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)
Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.
The question was incomplete. find the full content below:
Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid
A. 3.4 x \(10^{11}\) kg
B. 8.3 x \(10^{12}\) kg
C. 1.2 x \(10^{12}\) kg
D. 1.2 x \(10^{10}\) kg
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Based on the activity series provided, which reactants will form products? F > Cl > Br > I CuI2 + Br2 Right arrow. Cl2 + AlF3 Right arrow. Br2 + NaCl Right arrow. CuF2 + I2 Right arrow.
Answers
Answer: Cul2 + Br2 ->
Explanation:
Answer:
i believe the answer is a
Explanation:
oxygen and sulfur bonding patterns: build each of the indicated molecules below in the simulator and match them to the correct bonding pattern in respect to either oxygen or sulfur. remember if a molecule does not have a name when you build it is not a stable arrangement and you might have to reorder your atoms. for example: h2o - 2 single bonds as you complete the matching below think of the following: how do oxygen and sulfur atoms tend to bond in molecules? what patterns do you see? how many covalent bonds (total) do oxygen atoms or sulfur atoms tend to form? group of answer choices ocl2 [ choose ] no [ choose ] onh [ choose ] co2 (only describe one of the oxygen atoms) [ choose ] bs [ choose ] sis2 (only describe one of the sulfur atoms) [ choose ]
Answers
The compromise for these two elements would be to share valence electrons in order for them to adhere to the octet rule. Nonmetallic elements oxygen and Sulphur fall into this category. Covalent bonds are produced when atoms share electrons.
What is meant by element?Chemical substances that cannot be converted into other chemicals are referred to as elements.Chemical elements are distinguishable from one another by the number of protons in their atoms' nucleus, which is the fundamental particle that makes up a chemical element. A crucial component of a whole. a simple substance that cannot be divided into smaller components or transformed into another substance is referred to as in chemistry. Atoms, which are made up of protons, neutrons, and electrons, are the building blocks of an element. One element has a fixed number of protons in each of its atoms. A basic thing that is difficult to divide into smaller parts is known as an element.To learn more about element, refer to:
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How many acidic protons are there in 0.6137 g of KHP?
Answers
0.6137 g of KHP contains 1.086 × 10^21 acidic protons.
Number of moles of KHP = mass of KHP/molar mass of KHP
Molar mass of KHP = 204.22 g/mol
Mass of KHP = 0.6137 g
Number of moles of KHP = 0.6137 g/204.22 g/mol = 0.003 moles of KHP
Now, 1 each molecule of KHP contains 1 acidic proton.
For 0.003 moles of KHP there are; 0.003 × 1 × NA
Where NA is Avogadro's number.
So; 0.003 moles of KHP contains 0.003 × 1 × 6.02 × 10^23
= 1.086 × 10^21 acidic protons.
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moles of each product that would form as a result of the decomposition of aspirin
Answers
The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).
The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:
\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)
From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.
Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.
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An element that is likely to combine with other elements to form new substances is said to be ______.
A. buoyant
B. chemically reactive
C. metallic
D. solid at room temperature
Answers
Answer:
B. Chemically reactive
Explanation:
A Chemically reactive element is an element that is likely to combine with another element to form new substances
The reactivity of the element depends on the number of electrons in the outermost energy level and even the distance of the outermost energy level from the nucleus. From the periodic table, Fluorine is the most reactive non-metal while francium is the most chemically reactive metal
The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 1.7 cm by 3.0 cm by 12.9 cm.
Answers
Answer: 177.23 g.
Explanation:
the volume of the aluminum bar is
1.7 cm x 3.0 cm x 12.9 cm
= 65.61 cm^3
2.7 g/cm^3 x 65.61 cm^3
177.23g
A sample of the compound has 9 grams of cobalt. How many grams of fluorine does the sample have?
Answers
The mass (in grams) of fluorine the sample have is 2.91 g
How do I determine the mass of fluorine?First, we shall determine the mole of 9 grams of cobalt. Details below:
Mass of cobalt = 9 grams Molar mass of cobalt = 58.93 g/mol Mole of cobalt =?Mole = mass / molar mass
Mole of cobalt = 9 / 58.93
Mole of cobalt = 0.153 mole
Finally, we shall determine the mass of fluorine the present in the compound. Details below:
Molar mass of fluorine = 19 g/mol Mole of cobalt = 0.153 moleMole of fluorine = Mole of cobalt = 0.153 moleMass of fluorine = ?Mole = mass / molar mass
0.153 = Mass of fluorine / 19
Cross multiply
Mass of fluorine = 0.153 × 19
Mass of fluorine = 2.91 g
Thus, the mass of fluorine is 2.91 g
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H₂F5BLi
plsssss helppp ima fail if i don’t go this
Answers
The chemical elements involved are; hydrogen, fluorine, boron and lithium
There are two hydrogen atoms, five fluorine atoms, one boron atom and one lithium atom.
What is a chemical formula?Chemical compounds are represented symbolically by chemical formulas, which reveal the types and amounts of atoms that make up the compound. It is a succinct approach to explain a substance's makeup.
The components of a compound are identified in a chemical formula by their corresponding chemical symbols, which are typically derived from their English or Latin names. The number of atoms of each element in a single compound molecule is indicated by the subscripts that follow each element.
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Give the gradient of a graph of p against T in terms of n, R and V.
Answers
Answer:3
Explanation:
A hurricane is a type of severe cyclone
Answers
A hurricane is a type of severe cyclone formed when winds rotate as the pressure between low and high-pressure areas increases.
What is a hurricane?A cyclone is a violent storm that occurs when cyclone winds exceeds a speed of 74 miles (119 kilometers) per hour.
Hurricanes are classified according to their strength and catastrophic potential on a scale ranging from 1 to 5 (more violent).
In conclusion, a hurricane is a cyclone formed when a it rotates as the low and high-pressure areas increases.
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What is the mass of 40.00 mL water in correct significant figures, if density of water at room temperature is close to 1.00 g/mL?
Answers
Which treatment(s) will help remove contaminants from minerals or from the pipes carrying water from a source? you can select more than one (Water Contamination Gizmos) **ONLY ANSWER IF YOU ACTUALLY KNOW ❗️❗️**
answer choices:
Sedimentation
Disinfection
Filtration
Coagulation
Answers
Sedimentation, filtration, and coagulation are the treatments that will help remove contaminants from minerals or from the pipes carrying water from a source.
Sedimentation is a process in which suspended particles settle out of water. It is one of the most basic techniques for removing particles from water. As particles settle, they become trapped in the bottom of a container or settle to the ground in an outdoor setting
Filtration is a method of removing particles from a fluid. It is a physical or chemical separation method that separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass.
Coagulation is the process of using chemicals to remove contaminants from water. By creating a chemical reaction, coagulation destabilizes particles and causes them to clump together. This helps to remove the contaminants from the water.
Disinfection is the process of eliminating or destroying pathogens that cause infection. Disinfection eliminates harmful microorganisms by destroying or inactivating them. The disinfectant is a chemical or physical agent that is used to destroy or inactivate harmful microorganisms.
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What is the total number of ions in one formula unit of (NH4)2CO3?
Answers
Answer:
in the image above
+++++++++
hope this helps please mark me brainiest
There are 3 ions in one formula unit of (NH4)2CO3.
Ions present in Ammonium carbonate.(NH4)2CO3
(NH4)2CO3 is called Ammonium carbonate. The formula indicates that in one mole of ammonium carbonate, There are
Two moles of ammonium ions,NH₄⁺ with valency of +1.1 mole of Carbonate ions CO₃²⁻ with valency of -2.When 1 mole of ammonium carbonate is dissolved in water it gives
(NH₄)₂CO₃ ₊ H₂O---->2NH₄⁺ ₊ CO₃²⁻
Ions present are 2NH₄⁺ and CO₃²⁻
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what's the molecular geometry of SiCI4
Answers
Answer:
Tetrahedral shape
Explanation:
The compound SiCl₄ has a molecular geometry of a tetrahedral shape. The shape of compound can be predicted using the valence shell electron pair repulsion theory model.
The total electron pair around the central atoms is 4. The number of bond pairs is 4. Lone pair is zero.Iodine 131, cesium 137, and strontium 90 are all considered isotopes. What are isotopes?
Answers
Answer:
Isotopes are variants of an element, where the number of neutrons is different but its number of protons stay the same.
Explanation:
If the number of protons had changed then it would just be a different element.
Electron number changing simply adds charge to the atom, and doesn't change it or anything.
PLS GIVE BRAINLIEST
Answer:
Isotopes are one of two or more forms of the same chemical element.
Explanation:
Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number,but a different number of neutrons giving each element isotope of a different atomic weight.
HQ5.40
Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
Answers
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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Which of the following carbocations is(are) likely to undergo a rearrangement?
A. only I
B. I and III
C. II and III
D. I, II, III
Answers
The cations that are more likely to undergo rearrangement are II and III Option C
Why does cations undergo rearrangement?
Cation rearrangement is a phenomena that causes cations, which are positively charged ions, to reorganize themselves under specific conditions. The term "cation rearrangement " describes the movement of ions inside a substance or solution that is caused by a variety of elements, including concentration gradients, electric fields, or chemical reactions.
Rearrangements influence the mobility and redistribution of cations inside substances or solutions, which can have a significant impact on the system's behavior and characteristics.
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