Answer:
please give me brainlist and follow
Explanation:
sodium
The molten metal that catches fire in chlorine gas and gives off white fumes is sodium. The metal that forms two types of its oxide and rust in moisture is iron. The formulas of its oxides are : FeO;Fe2O3. The metal used in hot water systems is copper, because it is a good conductor of heat and electricity.
Answer:
I think it is Sodium not sure but try
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 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.)
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)
Can You please solve the question b in the photo. Will give branliest.
Answer:
Br₂ + 2e⁻ ⇄ 2Br⁻ Half reaction of reduction
2I⁻ ⇄ 2e⁻ + I₂ Half reaction of oxidation
Br₂ + 2I⁻ + 2K⁺ ⇄ I₂ + 2Br⁻ + 2K⁺
Explanation:
This is an easy redox reaction:
Br₂ + 2KI → I₂ + 2KBr
We determine the oxidation states.
0 for the elements at ground state.
K does not change the oxidation state during the reaction.
Bromine is reduced to bromide (oxidation state decreases)
and iodide is oxidized to Iodine (oxidation state increases)
Br₂ + 2e⁻ ⇄ 2Br⁻ Half reaction of reduction
2I⁻ ⇄ 2e⁻ + I₂ Half reaction of oxidation
In oxidation, electrons are released while in reduction, the electrons are gained. To make the ionic equation, we just add K⁺
So we sum both reactions
Br₂ + 2e⁻ + 2I⁻ + 2K⁺ ⇄ 2e⁻ + I₂ + 2Br⁻ + 2K⁺
We cancel the electrons on both sides of the equation:
Br₂ + 2I⁻ + 2K⁺ ⇄ I₂ + 2Br⁻ + 2K⁺
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 will increased temperature in a reaction cause
1 Particles in a reaction to move more slowly
2 Particles in a reaction to move faster
3 Particles in a reaction to generate more electrical ions
4 Particles in a reaction to lose more electrical ions
1) ____C3H8 + ____O2 → ____CO2 + ____H2O
A cold object will have_ kinetic energy which means _ faster moving particles
Answer: if this is true or false, then this is false, something that is cold has slow moving particles, fast moving ones generate heat which will make it warm, this object has potential energy not kinetic.
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
Calculate the pH and pOH of a solution of sodium hypoiodite NaOI, with a formal concentration of 0.05784 mol L-1. Note that the compound is soluble, dissolves into sodium and hypoiodite ions, and these react with water. The p K a of hypoiodous acid at 298 K is 10.64. Calculate the pH and the pOH of the resulting solution. Use all the approximations you can, be sure to verify them.
Answer:
pH = 11.70
pOH = 2.298
Explanation:
As we know
NaOI + H2O NaOH + HOI
pH = 7 + ½ (pKa + log (HOI))
Substituting the given values, we get –
pH = 7 + ½ (10.64 + log (0. 0.05784))
pH = 7 + ½ (10.64 -1.2377)
pH = 11.70
pOH = 14 – pH
pOH = 14 -11.70
pOH = 2.298
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
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:
PLEASE HELP !! ILL GIVE BRAINLIEST !! 100 POINTS
Answer:
b is the best in my opion
Explanation:
energy level of diagram
Answer:
The energy level diagram is used to represent the energy states available in each atom. When an electron is in an energy state, it emits nor absorbs radiation. A photon is emitted or absorbed when an electron transitions from one energy state to another.
Explanation:
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
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:
My sporty mini van needs 19,126 kJ of energy in order to pass a fast moving street sweeper on the road. Using the following equation, determine how many grams of gasoline (C8H18) will be used up in order to make this happen. 2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O \DeltaΔH = -10,990 kJ
Answer:
[tex]m=397.6gC_8H_{18}}[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:
[tex]\Delta H=\frac{-10,990kJ}{2molC_8H_{18}}=-5495\frac{kJ}{molC_8H_{18}}[/tex]
Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:
[tex]n=\frac{Q}{-\Delta H } \\\\n=\frac{19,126kJ}{-(-5495\frac{kJ}{molC_8H_{18}} )} \\\\n=3.48molC_8H_{18}}[/tex]
Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:
[tex]m=3.48molC_8H_{18}} *\frac{114.22gC_8H_{18} }{1molmolC_8H_{18}} } \\\\m=397.6gC_8H_{18}}[/tex]
Best regards!
what charge does copper have?
Answer: 1+charge
Explanation: hoped this helped:)
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!
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
. Elements in the Periodic Table are arranged according to increasing numbers of _____________, which is called the ___________ ______________ on an element key.
Answer:. Elements in the Periodic Table are arranged according to increasing numbers of ______atoms_______, which is called the ______atomic _____ _______number_______ on an element key.
Explanation: I just learned about this at school!! ; )
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
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.
what are two functions of the cilia?
Answer:
- Proper urine flow by signalling the kidney cells.
- They act as mechanoreceptors or sensory receptors.
Explanation:
A 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:
https://brainly.com/question/25996347
URGENT PLEASE HELP! Given 3.4 grams of x element with a molar mass of 24 g/mol and 4.2 grams of y element with a molar mass of 35 g/mol. How much of compound xy2 can be generated?
x + 2y -> xy2
4.4 g XY
I'm not sure but that's the closest I can get or try
DETERMINE THE MOL OF WATER NEEDED TO REACT WITH1.5 MOL OF NITROGEN DIOXIDE. 3NO2+ H20→ 2HNO3 + NO
0.25mol h2o
0.5 mol h2o
0.75 mol h2o
1.0mol h2o
Answer: 0.5 mol h2o
Explanation: Hope this help :D
Draw the atomic structure with electronic configuration of Potassium
Answer:
Explanation:
i try to help you
✧Kindly see the attached picture! ☄
♪ Hope I helped! ♡
[tex] \star[/tex] Best regards! ツ
☞ [tex] \underbrace{ \overbrace{ \mathfrak{Carry \: On \: Learning}}}[/tex] ✎
How many lone pairs are on the central atom of a molecule of RnCl4?
A. 0
B. 2
C. 3
D. 1
$$$$$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.