Answer:
The empirical formula of the oxide is CuO
Explanation:
Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO
$$$$$Are the properties of potassium (K) more similar to those calcium (Ca) or those of sodium (Na)? Why?
Answer: potassium and sodium have similar properties
Explanation: Na and K belong to alkali metals. Both have one electron in outer shell. Calcium has two electrons in outer shell.
1) ____C3H8 + ____O2 → ____CO2 + ____H2O
Calculate the mass in grams of a 1.070 mole of acetylene ,C2H2
Answer:
27.86x10^-3 Kg
Explanation:
Hi! To get the result you only need to use this formula: m = n x M <=> m = 1.070 x ((2x12.01 + 2x1.01) x 10^-3) = 27.8628 x 10^-3 Kg. Hope it helped!
if u mix 10ml of 70%ethanol with 20ml of 80% ethanol with 50ml water what is the concentration of the resulted solution
Answer:
29% is the final concentration
Explanation:
To solve this question we must find the volume of ethanol added and the volume of the whole solution. The concentration will be:
Volume ethanol / Total volume * 100
Volume ethanol:
10mL * 70% = 7mL ethanol
+
20mL * 80% = 16mL ethanol
= 23mL ethanol
Total volume:
10mL + 20mL + 50mL = 80mL
Concentration:
23mL / 80mL * 100
= 29% is the final concentration
What is the value of for this aqueous reaction at 298 K?
A+B↽⇀C+D ΔG°=12.86 kJ/mol
K=
Answer:
The equilbrium constant is 179.6
Explanation:
To solve this question we can use the equation:
ΔG = -RTlnK
Where ΔG is Gibbs free energy = 12.86kJ/mol
R is gas constant = 8.314x10⁻³kJ/molK
T is absolute temperature = 298K
And K is equilibrium constant.
Replacing:
12.86kJ/mol = -8.314x10⁻³kJ/molK*298K lnK
5.19 = lnK
e^5.19 = K
179.6 = K
The equilbrium constant is 179.6A chemical reaction between sodium bicarbonate and acetic acid occurs in a lab. The sum of the
reactants is 345 grams. As the chemical reaction proceeds, a gas is formed. Select the answer that best
describes the mass of the remaining solid product.
a. 345 g, same as the mass of the reactants
b. greater than 345 g
c. less than 345 g
d. none of the above
As the chemical reaction proceeds, a gas is formed with the water molecule and CH₃COONa, so the mass of the remaining solid product is less than 345 g.
What is the stoichiometry?Stoichiometry tells about the relative amount of reactants and products before and after the reaction in terms of coefficient.
Given chemical reaction is:
NaHCO₃ + CH₃COOH → CH₃COONa + CO₂ + H₂O
From the stoichiometry of the reaction it is clear that 1 mole of both the reactants will form products. And for the formation of product amounts of the reactants get wholly consumed. From 345 grams of reactants carbon dioxide gas, water and sodium acetate salt is formed, so the mass of this formed salt is less than 345 grams.
Hence, option (C) is correct i.e. less that 345g.
To know more about stoichiometry, visit the below link:
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Muriatic acid is often used to remove rust. A solution of muriatic acid, HCl, reacts with Fe203 deposits on
industrial equipment. How many liters of 5.00 M HCl would be needed to react completely with 339 g
Fe203?
Answer:
2.54 L
Explanation:
Step 1: Write the balanced neutralization equation
6 HCl + Fe₂O₃ → 3 H₂O + 2 FeCl₃
Step 2: Calculate the moles corresponding to 339 g of Fe₂O₃
The molar mass of Fe₂O₃ is 159.69 g/mol.
339 g × 1 mol/159.69 g = 2.12 mol
Step 3: Calculate the moles of HCl that react with 2.12 moles of Fe₂O₃
The molar ratio of HCl to Fe₂O₃ is 6:1. The reacting moles of HCl are 6/1 × 2.12 mol = 12.7 mol
Step 4: Calculate the volume of HCl
12.7 moles are in 5.00 M (5.00 mol/L) HCl. The required volume is:
12.7 mol × 1 L/5.00 mol = 2.54 L
In order to determine the magnetic properties of phosphorus atom we need to find out the number of unpaired electrons present in the ground state of phosphorus atom! Select one of the answers below that represents this number.
Group of answer choices
1
4
3
0
2
Answer:
Think of it this way If you have a phosphorus atom whats its oposites once you found that out you may be able to find the answer
Explanation:
Hope this helps :)
What is the pH of a solution that has a hydrogen ion concentration of 6.9*10^-4?
The pH would be 3.16 because the formula for finding the pH from a H± ion is pH = -log [H±]
So with that formula, you first have to substitute the H± with your numbers which in this case is 6.9 × 10^-4.
It should like this:
pH = -log (6.9 × 10^-4)
And lastly, just calculate.
pH = 3.16
Hope that helps, do let me know if you need more help in understanding this!
What is the value of for this aqueous reaction at 298 K?
A+B↽⇀C+D
ΔG°=12.86 kJ/mol
K=
Answer:
Kc = 0.5951 (4 sig. figs.)
Explanation:
For A + B ⇄ C + D at standard thermodynamic conditions (298K, 1atm)
ΔG = ΔG° + R·T·lnQ => 0 = ΔG° + R·T·lnKc => ΔG° = - R·T·lnKc
=> lnKc = - ΔG°/R·T
ΔG° = +12.86 Kj/mol
R = 8.314 Kj/mol·K
T = 298K
lnKc = - (+12.86Kj) / (8.314Kj/mol·K)(298K) = - 0.519 mol⁻¹
Kc = e⁻⁰°⁵¹⁹ mol⁻¹ = 0.5957 mol⁻¹ (4 sig. figs.)
If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true?
a. The ice is cooler than the table.
b. The table and the ice are at thermal equilibrium.
c. Energy is being transferred from the ice to the table.
d. The ice is no longer 0°C.
Answer:
C???
Explanation:
How many elements of oxygen are present in the molecule below 3Ca(OH)2
Answer:
Two elements of oxygen are presented.
Calculate the amount (in moles) of magnesium in 1.23 g.
Answer
0.32 is that answer
Explanation:
you just use the calculator
names the process which takes place when a red litmus paper turns white when dropped into chlorine water
Answer:
Answer. Explanation: Chlorine gas bleaches the damp litmus (red or blue). Bleaching is an oxidation process.
A solution of sugar that contains the maximum amount of sugar that will dissolve is a ________ solution.
No false links plz, thanks!
(Sorry if this is confusing, it is to me too, trust me )
Answer:
A solution of sugar that contains the maximum amount of sugar that will dissolve is a saturated solution.
Explanation:
A saturated solution is a solution that contains as much solute as can dissolve in a given solvent at a given temperature.
for you the solute is sugar
Explain the difference between a mixture of two substances and a chemical compound formed by them
Answer:
mixtures are physically combined structures that are separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.
Explain:
yw
ask your mom and your family
Which is the best example of a new substance forming?
cutting a piece of paper
lighting a match
popping a balloon
hitting a nail with a hammer
if all objects have gravity why aren't you pulled toward the large building when you stand near it?
I need a good answer.
Answer:
Explanation:
You actually are being pulled towards everything and everything is being pulled towards you. Everything exerts a gravitational force, but our force and the force of the objects around us is not strong enough to actually move objects
What's the partial pressure of hydrogen in a gas mixture if its mole fraction is 0.1 and the total pressure is 325 torr?
Question 15 options:
325 torr
32.5 torr
100 torr
65 torr
Naproxen (sold under the name Aleve) is a nonsteroidal anti-inflammatory drug (NSAID), and is used to treat different types of pain.
a. True
b. False
4 grams of N is how many moles of N?
Answer:
0.285577616426424
Explanation:
Hope this helps!
How many lone pairs are on the central atom of a molecule of RnCl4?
A. 0
B. 2
C. 3
D. 1
Create a graphic organizer describing types of substances including the difference between pure substance and mixture with subtypes and examples.
SCAM ANSWERS WILL BE DELETED.
If you answer this seriously I will P.A.y.P.a.l you 2 dollars. just leave them in the comments of your answer
Answer:
Pure substances are further divided into elements and compounds. The combination of two or more pure substances is called a mixture. Mixtures can be classified into two types viz. heterogeneous and homogeneous mixtures.
Explanation:
Solution A has a pH of 3, and solution B has a pH of 5. Which statement best
describes these solutions?
A. Solution A is acidic, and solution B is basic.
B. Solution A is basic, and solution B is acidic.
C. Solution B is less acidic than solution A.
O D. Solution B is more acidic than solution A.
Answer:
C. Solution B is less acidic than solution A.
Which of the following gases effuses most rapidly?
(Atomic mass of : H = 1 g/mol, C = 12 g/mol , N = 14 , g/mol , O = 16 g/mol , Cl = 35.5 g/mol )
a.
hydrogen chloride
b.
nitrogen
c.
carbon monoxide
d.
ammonia
e.
oxygen
Answer:
C. Carbon monoxide
This is my answer tell me if wrong
Ammonia among all the gases effuses most rapidly. Therefore, the correct option is option d.
A gas can escape or flow through a small aperture into a vacuum or a region with lower pressure through a process called effusion. It is a specific kind of gas flow that takes place in those circumstances. The square root of a gas's molar mass has an inverse relationship with the rate of effusion of that gas. The gas will effuse more quickly the lower the molar mass.
The molar mass are calculated as:
a. hydrogen chloride (HCl): H (1 g/mol) + Cl (35.5 g/mol) = 36.5 g/mol
b. nitrogen (N2): N (14 g/mol) + N (14 g/mol) = 28 g/mol
c. carbon monoxide (CO): C (12 g/mol) + O (16 g/mol) = 28 g/mol
d. ammonia (NH3): N (14 g/mol) + H (1 g/mol) + H (1 g/mol) + H (1 g/mol) = 17 g/mol
e. oxygen (O2): O (16 g/mol) + O (16 g/mol) = 32 g/mol
The square root of the molar masses are given as:
a. √36.5 ≈ 6.04
b. √28 ≈ 5.29
c. √28 ≈ 5.29
d. √17 ≈ 4.12
e. √32 ≈ 5.66
Ammonia has the lowest molar mass and hence the fastest effusion rate of all the gases.
Therefore, the correct option is option d.
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what causes ignition
Answer:
An ignition coil can fail due to a high voltage puncture of its body, or an open primary or secondary winding. A few are killed by overheating when the control side of the primary side develops a short to ground. Something as simple as badly worn spark plugs will increase the demand from the coil, and eventually lead to failure.
But if I were to discuss the current leading cause of ignition coil replacement, I would have to say misdiagnosis and bad internet information. This is especially true of modern “coil on plug” systems. Often, the actual coil is fine, and the only damage is the replaceable spark plug boot.
I've seen countless examples of online “advice” to start with replacing all spark plugs and coils at the suggestion of any power loss or hiccup. Then the car owner purchases the cheapest set of coils that they can find. Not only is the initial problem still present , but they likely WILL have a future misfire due to poor quality parts selection. All misfires are not caused by coils and spark plugs.
Explanation:
1. Write formulas for the binary ionic compounds formed between
the following elements:
a. potassium and iodine d. aluminum and sulfur
b. magnesium and chlorine e. aluminum and nitrogen
C. sodium and sulfur
The formulas for the binary ionic compounds are:
a. potassium and iodine: KI.b. magnesium and chlorine: MgCl₂.c. sodium and sulfur: Na₂S.d. aluminum and sulfur: Al₂S₃.e. aluminum and nitrogen: AlN.We want to write the formulas of different binary ionic compounds. to do so, we need to consider the octet's rule.
What is the octet's rule?The octet's rule establishes that atoms will lose, gain or share electrons to achieve the electron configuration of the nearest noble gas (8 valence electrons except for He with 2).
a. potassium and iodineK has 1 valence electron so it will lose 1 electron to form K⁺. I has 7 valence electrons so it will gain 1 electron to form I⁻. The neutral compound between K⁺ and I⁻ is KI.
b. magnesium and chlorine
Mg has 2 valence electrons so it will lose 2 electrons to form Mg⁺². Cl has 7 valence electrons so it will gain 1 electron to form Cl⁻. The neutral compound between Mg⁺²⁺ and Cl⁻ is MgCl₂.
c. sodium and sulfur
Na has 1 valence electron so it will lose 1 electron to form Na⁺. S has 6 valence electrons so it will gain 2 electrons to form S⁻². The neutral compound between Na⁺ and S⁻² is Na₂S.
d. aluminum and sulfurAl has 3 valence electrons so it will lose 3 electrons to form Al³⁺. S has 6 valence electrons so it will gain 2 electrons to form S⁻². The neutral compound between Al³⁺ and S⁻² is Al₂S₃.
e. aluminum and nitrogenAl has 3 valence electrons so it will lose 3 electrons to form Al³⁺. N has 5 valence electrons so it will gain 3 electrons to form N³⁻. The neutral compound between Al³⁺ and N³⁻ is AlN.
The formulas for the binary ionic compounds are:
a. potassium and iodine: KI.b. magnesium and chlorine: MgCl₂.c. sodium and sulfur: Na₂S.d. aluminum and sulfur: Al₂S₃.e. aluminum and nitrogen: AlN.Learn more about binary compounds here: https://brainly.com/question/7960132
number of proton of gold
Answer:
English Language Learners Definition of number. (Entry 1 of 2) : a word or symbol (such as "five" or "16") that represents a specific amount or quantity. : a number or a set of numbers and other symbols that is used to identify a person or thing.
Explanation:
79 is the number of protons gold has.
Hope this helps; have a great day!
Consider a iron-silver voltaic cell that is constructed such that one half-cell consists of the iron, Fe, electrode immersed in a Fe(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in a AgNO3 solution. The two electrodes are connected by a copper wire. The Fe electrode acts as the anode, and the Ag electrode acts as the cathode. To maintain electric neutrality, you add a KNO3 salt bridge separating the two half-cells. Use this information to solve Parts B, C, and D. Part B The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell is the site of the reduction reaction. Type the half-cell reaction that takes place at the anode for the iron-silver voltaic cell. Indicate the physical states of atoms and ions using the abbreviation (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) for an aqueous solution. Do not include phases for electrons. Express your answer as a chemical equation.
Answer:
See explanation
Explanation:
In the voltaic cell, energy is produced by spontaneous chemical reaction. One half cell functions as the anode (in this case it is the Fe/Fe^2+ half cell) while the other half cell functions as the cathode (in this case it is the the Ag/Ag^+ half cell).
At the anode;
Fe(s) -----> Fe^2+(aq) + 2e
At the anode;
2Ag^+(aq) + 2e ------> 2 Ag(s)
Overall cell equation;
Fe(s) + 2Ag^+(aq) ------> Fe^2+(aq) + 2 Ag(s)
The chemical formula for sodium citrate is Na3C6H5O7. Which statement is true? Sodium citrate is a compound with a total of 21 atoms. Sodium citrate is an element with a total of 21 atoms. Sodium citrate is a compound with a total of 4 atoms. Sodium citrate is a compound with a total of 21 atoms, each of a different element.
Answer:
Sodium citrate is a compound with a total of 21 atoms