Answer:
please give me brainlist and follow
Explanation:
About 110 g . Explanation: Your tool of choice here will be the solubility graph for potassium nitrate, KNO3 , in water.
Which of the following statements is true?
Answer:
option first is right answer
Which of the following polyatomic ions will form an ionic compound with a single sodium ion?
CO3 2-
HCO3 1-
SO4 2-
SO3 2-
Answer:
Option B, HCO3 1-
Explanation:
The valence of Sodium ion is +1 and the valence of HCO3 is -1. Thus, sodium ion has an extra electron to be donated to complete its outer shell while HCO3 needs an electron to complete its outer shell
Hence Na will combine with HCO3 to form NaHCO3
Option B is correct
The polyatomic ion which will form an ionic compound with a single sodium ion is; HCO3 ¹-
In chemical bonding between ions;
The major criteria is a balance of charges within the compound formed.
As such, all polyatomic ions in the option are di-ionic except for HCO3 1- which can perfectly form an ionic compound with 1 single sodium ion.
Read more on ionic compounds:
https://brainly.com/question/13539062
balance Al2O3 + NaOH + H2O = NaAl(OH)4
Answer:
Al₂O₃ + 2 NaOH + 3 H₂O = 2 NaAl(OH)₄
ASAP. Which process represents a physical change?
1.Roasting a marshmallow over a camp fire
2.Melting chocolate in a pan on the stove
3.Bruising of a banana's skin after dropping on the floor
4.Bubbling due to an antacid tablet in vinegar
How many elements of oxygen are present in the molecule below 3Ca(OH)2
Answer:
Two elements of oxygen are presented.
Mr. Ragusa asks Hassan to make silver crystals from the following reaction.
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
Mr. Ragusa gives Hassan 51 g of silver nitrate to conduct the experiment. Hassan gives Mr. Ragusa 20 g of
silver crystals. What was Hassan's percent yield for his experiment?
Please round your answer to 2 decimal places
Answer:
Percentage yield = 61.7%
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated:
2AgNO₃ + Cu —> Cu(NO₃)₂ + 2Ag
Next, we shall determine the mass of AgNO₃ that reacted and the mass of Ag produced from the balanced equation. This is illustrated below:
Molar mass of AgNO₃ = 108 + 14 + (16×3)
= 108 + 14 + 48
= 170 g/mol
Mass of AgNO₃ from the balanced equation = 2 × 170 = 340 g
Molar mass of Ag = 108 g/mol
Mass of Ag from the balanced equation = 2 × 108 = 216 g
SUMMARY:
From the balanced equation above,
340 g of AgNO₃ reacted to produce 216 g of Ag.
Next, we shall determine the theoretical yield of Ag. This can be obtained as follow:
From the balanced equation above,
340 g of AgNO₃ reacted to produce 216 g of Ag.
Therefore, 51 g of AgNO₃ will react to produce = (51 × 216)/340 = 32.4 g of Ag.
Thus, the theoretical yield of Ag is 32.4 g.
Finally, we shall determine the percentage yield of Ag. This can be obtained as follow:
Actual yield = 20 g
Theoretical yield = 32.4 g
Percentage yield =?
Percentage yield = Actual yield /Theoretical yield × 100
Percentage yield = 20 / 32.4 × 100
Percentage yield = 61.7%
How many molecules are in 3 moles of CO2?
O A. 5.418 x 1024
OB. 1.806 x 1024
O C. 6.02 x 1024
O D. 1.806 x 1023
Answer:
1.806 × 10²⁴Explanation:
The number of molecules can be found by using the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 3 × 6.02 × 10²³
We have the final answer as
1.806 × 10²⁴Hope this helps you
Answer: OB. 1.806 x 1024
Explanation:
When the gas shown in the Energy Distribution diagram is heated to "T2," what has happened?
Select all that apply.
The average kinetic energy has lowered.
The average kinetic energy has increased.
o The highest energy level has decreased.
Less molecules have a higher energy level.
More molecules have a higher energy level.
Answer:
The average kinetic energy has increased. More molecules have a higher energy level.
Explanation:
I so esay
What is the molarity of a solution that is made with 3 moles of Na and 2 L of water
Answer - 1.50 M Na
Explanation -
3.00 moles of Na over 2.00 L of water.
3.00/2.00 = 1.50 M Na
I cannot be entirely sure. But it's an educated guess.
If you had 6H2 molecules and 4O2 molecules, how many H2O molecules could you produce?
Answer:
6
Explanation:
As , 2H2 + O2 = 2H2O
with 6 H2, 4O2 is excess.
H2O molecules formed = 6
1. How many grams of potassium chloride (KCI)
can be dissolved at 10°C?
Answer:
At 10 ∘C , the solubility of potassium chloride is measured to be 31.2⋅g per 100⋅g of water.
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
Question 10.
Which of the following are agricultural implements?
(a) Seed drills
(b) Silos
(c) Harrow
(d) All of these
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
A popular classroom demonstration consists of filing notches into a new penny and soaking the penny in hydrochloric acid overnight. Because new pennies are made of zinc coated with copper, and hydrochloric acid dissolves zinc and not copper, the inside of the penny is dissolved by the acid, while the outer copper shell remains. Suppose a penny contains 2.5 g of zinc and is soaked in 20.0 mL of 6.0 M HCl. Calculate the concentra- tion of the HCl solution after all of the zinc has dissolved. Hint: The Zn from the penny is oxidized to Zn2
Answer:
[tex]HCl conc=2.2M[/tex]
Explanation:
From the question we are told that:
Mass of zinc [tex]Mass_{z_n}=2.5g[/tex]
Initial conc of HCl [tex]HConc_1=6.0M[/tex]
Initial volume of HCl [tex]Hvol_1=20.0mL[/tex]
Molar mass of zinc [tex]M_{Z_n}=65.38g/mol[/tex]
Generally the equation for reaction is mathematically given by
[tex]2HCL+Zn\implies ZnCl_2 +H_2[/tex]
Generally the equation for moles of zinc [tex]m_{z_n}[/tex] is mathematically given by
[tex]m_{z_n}=\frac{Mass_{Z_n}}{M_{Z_n}}[/tex]
[tex]m_{z_n}=\frac{2.5g}{M_{65.38}}[/tex]
[tex]m_{z_n}=0.038molZn[/tex]
Generally the equation for moles of [tex]m_{HCl}[/tex] is mathematically given by
[tex]m_{HCl}=HConc_1*Hvol_1[/tex]
[tex]m_{HCl}=6.0M*20.0mL[/tex]
[tex]m_{HCl}=6.0M*20.0*10^{-3}L[/tex]
[tex]m_{HCl}=0.12\ mol\ HCl[/tex]
Generally the reacted moles of HCl [tex]HCl_[reacted][/tex] is mathematically given by
Since
Zn:HCl =1:2
Therefore
[tex]HCl_[reacted]=0.038*\frac{2}{1}[/tex]
[tex]HCl_[reacted]=0.076mol \ HCl[/tex]
Generally the moles of HCl after Zn oxidization X is mathematically given by
[tex]x=0.12-0.076[/tex]
[tex]x=0.044 mol HCl[/tex]
Generally the conc of hydrochloride acid X is mathematically given by
[tex]X=\frac{0.044}{0.020}[/tex]
[tex]X=2.2 M Hcl[/tex]
Therefore Conc of HCl
[tex]HCl conc=2.2M[/tex]
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.
names the process which takes place when a red litmus paper turns white when dropped into chlorine water
Answer:
Chlorine gas bleaches the damp litmus (red or blue). Bleaching is an oxidation process.
Explanation:
Answer:
Chlorine gas bleaches the damp litmus (red or blue). Bleaching is an oxidation process. If you are considering the colour change only - refer to it as bleaching. If you are considering the reaction mechanism and how the chemicals which provide the colour are changed, then refer to it as oxidation.
Explanation:
Ammonia is produced by the Haber process. The equation is shown.
N2 (g) + 3H2 (g) ⇔ 2NH3 (g)
The forward reaction is exothermic.
Which statement is correct?
Increasing pressure decreases the yield of ammonia, but speeds up the reaction.
Increasing temperature decreases the yield of ammonia, but speeds up the reaction.
Increasing the concentration of hydrogen and nitrogen results in a lower yield of ammonia.
Increasing the temperature increases the yield of ammonia and speeds up the reaction.
Answer:
option D
Explanation:
Increasing the temperature increases the yield of ammonia and speeds up the reaction as chemical reaction is affected by temperature.
Answer:
increasing the temperature decreases the yield of ammonia but speeds up the reaction
Explanation:
first pressure have no effect in chemical reaction
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 179.6Ionisation enthalpy across the group (increase or decrease)
Give reasons??
Answer:
As we move from left to right across a period, the ionization energy of elements increases. This is due to the decrease in the size of atoms across a period.
Answer:
[tex]\huge\boxed{Answer\hookleftarrow}[/tex]
Ionization enthalpy (IE) is the energy required to remove the highest-energy electron from a neutral atom. In general, ionization energy increases across a period and decreases down a group.So, for your question ⇻ IE decreases down the group.____________________
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
# ꧁❣ RainbowSalt2²2² ࿐
9. How much power is flowing into your house if the voltage is 120 V and the current is 50 A? Use the formula P = VI.
O A. 1200 Watts
O B. 240 Watts
O C. 6000 Watts
O D. 4800 Watts
Which of the following statements is a true statement regarding a solution with [H1+] =1x10-5 M and [OH1-]= 1x10-9 M?
A. The [H1+] > [OH1-] and the solution is basic
B. The [H1+] >[OH1-] and the solution is acidic
C. The [OH1-] > [H1+] and the solution is basic
D. The [OH1-] > [H1+] and the solution is acidic
Answer:
B. The [H1+] >[OH1-] and the solution is acidic
what is a characteristic of property acids pls help
Answer:
General Characteristics of Acids:
Sour taste (though you should never use this characteristic to identify an acid in the lab) Reacts with a metal to form hydrogen gas. Increases the H+ concentration in water. Donates H+ ions. Turns blue litmus indicator red.
An aqueous solution was made by dissolving 0.543 g of an unknown, monoprotic acid into 25.00 mL of water in an Erlenmeyer flask. After an acid/base indicator was added, 41.21 mL of 0.150 M NaOH was used to reach the end point.
a)Find the molar mass of the acid.
b)Determine the identity of the acid based on the following data:
PLEASE HELP ME
Answer:
a. 87.8g/mol is the molar mass of the acid.
b. The answer is in the explanation.
Explanation:
To solve this question we must find the moles of the monoprotic acid using the reaction with NaOH (1mole of monoprotic acid reacts with 1 mole of NaOH). With the moles and the mass of the unknown we can find the molar mass.
Moles of NaOH added:
0.04121L * (0.150moles / L) = 6.1815x10⁻³ moles NaOH = Moles monoprotic acid
Molar mass is:
0.543g / 6.1815x10⁻³ moles = 87.8g/mol is the molar mass of the acid
b. I can't see the image you are giving because has a low resolution. But the identity of the acid can be obtained because the acid:
Has the same molar mass.
Is a monoprotic acid.
(a) The molecular mass of the unknown monoprotic acid will be 87.84 g/moles.
(b) The acid can be butyric acid, as it is a monoprotic and have mass near about 87.84 g/mol.
(a) The endpoint by the addition of NaOH has been reached when the monoprotic acid has been completely utilized. Since the NaOH has been monobasic. The moles of NaOH will be equal to the moles of acid.
Moles of NaOH = moles of acid
The molarity of NaOH = 0.15 M
Volume of NaOH = 41.21 ml
Molarity = [tex]\rm \dfrac{moles}{volume\;(L)}[/tex]
Moles = molarity [tex]\times[/tex] volume (L)
Moles of NaOH = 0.15 [tex]\times[/tex] 0.04121 L
Moles of NaOH = 0.00618 moles
Moles of NaOH = moles of acid
moles of acid = 0.00618 moles.
Mass of acid dissolved = 0.543 grams
Molecular weight of acid = [tex]\rm \dfrac{weight}{moles}[/tex]
Molecular weight of acid = [tex]\rm \dfrac{0.543}{0.006815}[/tex]
Molecular weight of acid = 87.84 g/moles.
(b) The acid with the molecular mass of 87.84 g/mol with being the monoprotic acid can be butyric acid. The butyric acid has a molecular weight of 88 g/mol.
For more information about monoprotic acid, refer to the link:
https://brainly.com/question/22497931
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
Calculate the amount (in moles) of magnesium in 1.23 g.
Answer
0.32 is that answer
Explanation:
you just use the calculator
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!
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:
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!
HELP !! Which statement describes a periodic trend of electronegativity?
A. Electronegativity increases from right to left across a period.
B. Electronegativity increases from left to right across a period.
C. Electronegativity increases from top to bottom of a group.
D. Electronegativity remains the same within a period.
Answer:
B
Explanation: