Answer:
B.
Explanation:
weak acids - partially dissociate to give H+
strong acids - fully dissociate to give H+
What kind of reaction is symbolized by AB + C → CB + A?
O A. Synthesis
O B. Single replacement
O C. Double replacement
O D. Decomposition
Answer:
B. Single replacement.
Explanation:
The A in compound AB was replaced by C to make CB. Since there was only one instance of replacement, it is a single replacement reaction.
What environment will produce the largest crystal sizes?
Construct a short Essay (Make sure you include information about Temp, Pressure, amount of dissolved solids, & cooling time)
Is there support for your Claim?
Answer:
one factor is the speed at which crystals are formed
explanation:crystals that are formed near or on the surface tend to crystalize faster and therefore are usually smaller crystals deeper in the crust tend to crystalize slower and therefore are larger
What is the relationship between the enthalpy (AH) and entropy (AS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures?
The relationship between the enthalpy (ΔH) and entropy (ΔS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures is +ΔH, - Δs.
Relationship between enthalpy and entropy
The relationship between enthalpy (ΔH) and entropy (ΔS) is given by Gibs free energy.
ΔG = ΔH - TΔs
When ΔH < 0 and Δs < 0, ΔG = -ve (-ΔH, - Δs) (for lower temperature)
Also, when ΔH < 0 and Δs = +, ΔG = -ve (-ΔH, +Δs) (for all temperature)
When ΔH > 0 and Δs < 0, ΔG = -ve (+ΔH, - Δs) (for higher temperature)
Thus, the relationship between the enthalpy (ΔH) and entropy (ΔS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures is +ΔH, - Δs.
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Identify all of the ions that are
formed when H3PO4 ionizes in water
Answer:
H3PO4 + H2O (Phosphoric acid + Water)
Explanation:hope its help
A balloon contains 7.2 L of
He. The pressure is reduced
to 2.00 atm and the balloon
expands to occupy a volume
of 25.1 L. What was the initial
pressure exerted on the
balloon?
Given:
Unknown:
Formula:
Solution:
Final Answer:
Apply Boyles law
P1V1=P2V27.2(2)=25.1P214.4=25.1P_2P_2=0.57atmRemember
If Volume is four times increased pressure is 4 times decreased
What dynasty came after China's Five Dynasties and Ten Kingdoms?
Answer:
The Five Dynasties and Ten Kingdoms (907-960) is a period of great division in Chinese history, and is also the collective name for the Five Dynasties and the Ten Kingdoms.
The Five Dynasties refer to the five regimes located in the Central Plains that were successively replaced after the fall of the Tang Dynasty, namely Later Liang, Later Tang, Later Jin, Later Han and Later Zhou. At the end of the Tang Dynasty, the Five Dynasties and the beginning of the Northern Song Dynasty, there were many separatist regimes outside the Central Plains, among which more than ten separatist regimes such as the former Shu, the latter Shu, and the Northern Han were collectively referred to as the Ten Kingdoms.
Explanation:
Answer:
Mongol Yuan dynasty.
Explanation:
Which properties of a reaction make it a good choice for use in a heat engine?
how many grams of granite at 54.1 c must be added to 467.62 of water at 21 C to make the final temp of both come out to be 29.2 C? Specific heat of granite 0.79 J/g C, specific heat of water 4.184 J/g C
Answer:
815.59
Explanation:
Assuming no heat lost to the Surrounding
Total heat lost by granite = Total heat gained by water
mc∆T of granite = mc∆T of water
m x 0.79 x (54.1 - 29.2) = 467.62 x 4.184 x (29.2 - 21.0)
m x 19.671 = 16043.48106
m = 16043.48106/19.671
= 815.59J
Imagine you are in Spain and begin cooking some pasta for your dinner.
You notice the recipe reads "Bring water to a boil at 100 C". What is the
temperature of your water in Kelvin?
Ο OK
100 K
273 K
373 K
1. Calculate the molar mass of sucrose (C12 H11 O22)?
Answer:
=342g
Explanation:
atomic mass of C = 12g
atomic mass of H = 1g
atomic mass of O = 16g
Solution;
C12 H22 O11
= 12 (12) + 22 (1) + 11(16)
= 144+ 22 + 176
= 342g
A balloon inflated in a room at 24 degree celsius has a volume of 4 L. The balloon is then heated to a temperature of 58 degree celsius . What is the new volume?
Answer: The new volume of the balloon will be 4.45L
Explanation: We will solve this question through the concept of Charles's law. The law states that the volume of a gas is directly proportional to the absolute temperature, assuming the quantity of gas and pressure remain constant.
What is the percent composition of Cesium and Fluorine in CsF?
Heat flows–
A. from high places to low place.
B. from colder places to hotter places.
C. from hotter places to colder places.
D. from low places to high places
Answer:
A. from high places to low places
soil? Which organism in the tundra food chain would use this recycled matter?
of organisms and animal wastes.
A model of a shopping centre is drawn to scale where 1 cm on the model represent 4 m on the ground. Music shop Thabo's Sports Ware Fati's Clothing shop Grocery store PARKING Coffee shop Toilets Restaurant Shoe store Physiotherapy Health and Fitness center 1.1 Which shop is on the right of the physiotherapy? (2) 1.2 Describe the position of the Coffee Shop in relation to the Toilets. (2)
Which you would expect to diffuse faster, A or B?
A a gas through another gas
B a liquid through another liquid
b) explain you answer
help pls!
Answer:
A
Explanation:
I would expect a gas to diffuse through another gas faster because gases generally diffuse much faster than liquids. Hence, A is the best option.
What is the change in vapor pressure when 74.10 g fructose, C6H12O6, are added to 181.5 g water (H2O) at 298 K (vapor pressure of pure water at 298 K = 3.1690 kPa, molar mass of fructose = 180.156 g/mol, molar mass of water = 18.02 g/mol)?
The change in vapor pressure when 74.10 g fructose, C6H12O6, are added to 181.5 g water is 0.146.
What is vapor pressure?Vapor pressure is the measure or tendency of a substance to change into a vapor or gaseous state.
[tex]\rm Mole\; fraction\; of\; water = \dfrac{nH_2O}{nH_2O+npent.}[/tex]
Calculate the moles of water and fructose
[tex]\rm Number\;of \;moles= \dfrac{181.5 g}{18.02}= 10.072\\\\\rm Number\;of \;moles= \dfrac{74.10 g }{180.156 g/mol}=0.4113[/tex]
The total number of moles are
[tex]\dfrac{10.072}{10.072 + 0.486} = \dfrac{10.072}{10.558} = 0.953[/tex]
Calculating the vapor pressure
0.953 x 3.1690 kPa = 3.023
Change in vapor pressure
3.1690 kPa - 3.023 = 0.146
Thus, the change in vapor pressure is 0.146.
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Determine the volume of Oxygen gas produced by decomposition of 2.44g KClO3?
Answer:
0.956 grams O₂ or
0.956 milliliters O₂ or
9.56 x 10⁻⁴ L O₂
Explanation:
If the reactant were to decompose completely, the entire balanced reaction would look like this:
2 KClO₃ --> 2 K(s) + Cl₂(g) + 3 O₂(g)
To find the answer, (1) convert the grams of KClO₃ to moles (via molar mass from periodic table), then (2) convert moles KClO₃ to moles O₂ (via mole-to-mole ratio from balanced equation), then (3) convert moles O₂ to grams (via molar mass from periodic table).
Molar Mass (KClO₃) = 39.098 g/mol + 35.453 g/mol + 3(15.999) g/mol
Molar Mass (KClO₃) = 122.548 g/mol
Molar Mass (O₂) = 2(15.999) g/mol
Molar Mass (O₂) = 31.998 g/mol
2.44 g KClO₃ 1 mole KClO₃ 3 moles O₂ 31.998 g
-------------------- x -------------------------- x -------------------- x ------------------------
122.548 g 2 moles KClO₃ 1 mole O₂
= 0.956 grams O₂
= 0.956 milliliters O₂
= 9.56 x 10⁻⁴ L O₂
**The prompt askes to determine the volume. As far as I know, there is no easy way to find liters/milliliters with the given information. As such, I found the mass of O₂ instead. Technically, grams is equal to milliliters, so this may be what you are looking for. Then, you can convert from milliliters to liters by dividing by 1,000 (if necessary). **
Which process is necessary for the formation of igneous rocks?
(A) erosion (C) magma solidification
(B) deposition (D) metamorphism
Answer:
C - magma solidification
Explanation:
Igneous rock is created through heating and cooling of magma (lava).
As hot, molten rock rises to the surface, it undergoes changes in temperature and pressure that cause it to cool, solidify, and crystallize.
Find the empirical formula of a compound containing 26.56% potassium, 34.51% chromium, and the remainder oxygen.
Answer:
K₂Cr₂O₇
Explanation:
Finding % of O
% O = 100% - % K - % Cr% O = 100% - 26.56% - 34.51%% O = 73.44% - 34.51%% O = 38.93%Steps
Change % of each element into grams.Convert grams of each element into moles by dividing grams by molar mass.Divide all moles by the smallest number of moles.If the moles are all whole numbers, then you’re done and that’s your empirical formula.If not, multiply all moles by number such that everything is a whole number.Solving
We have 26.56g of K, 34.51g of Cr, and 39.93g of O
Moles of K, n(K) = 26.56/39.0983 = 0.68 molesMoles of Cr, n(Cr) = 34.51/51.9961 = 0.66 molesMoles of O, n(O) = 38.93/15.9994 = 2.43 molesK = 0.68/0.66 ≈ 1 x 2 = 2Cr = 0.66/0.66 = 1 x 2 = 2O = 2.43/0.66 = 3.5 x 2 = 7The empirical formula is K₂Cr₂O₇
A can of soda gets left in the car on a hot summer day. When the can was placed in the car it had an internal temperature of 10
and pressure of 2.07 atm. If the can heats up to 47.6 what will the pressure inside the can be? Remember to convert to Kelvin! (Report your answers to 2 decimal places)
Answer:
2.35 atm
Explanation:
According to the Ideal Gas Equation,
P₁/T₁ = P₂/T₂Here :
P₁ = 2.07 atmT₁ = 10 °C = 283 KT₂ = 47.6 °C = 320.6 KSolving :
P₂ = P₁T₂/T₁P₂ = 2.07 x 320.6 / 283P₂ = 663.642/283P₂ = 2.35 atm (rounded to 2 DP)dictwbdjdiucgahsuxijsjaashduhsh
Answer:
stroke
Explanation:
# 20 of Equilibrium
At 1500°C the system:
2NO(g)
N₂(g) + O₂(g) was allowed to come to equilibrium. The equilibrium concentrations were:
NO(g) = 0.0021 M; N₂ = O₂ = 0.239 M.
What is the value of Ke at this temperature?
Select one:
O a.
27.2
O b.
7.7 x 10-5
O c.
3.7 x 10-²
d.
1.3 x 104
O e. 8.8 x 10-3
Answer:
# 20 of Equilibrium
At 1500°C the system:
2NO(g)
N₂(g) + O₂(g) was allowed to come to equilibrium. The equilibrium concentrations were:
NO(g) = 0.0021 M; N₂ = O₂ = 0.239 M.
What is the value of Ke at this temperature?
Select one:
O a.
27.2
O b.
7.7 x 10-5
O c.
3.7 x 10-²
d.
1.3 x 104
O e. 8.8 x 10-3
Explanation:
# 20 of Equilibrium
At 1500°C the system:
2NO(g)
N₂(g) + O₂(g) was allowed to come to equilibrium. The equilibrium concentrations were:
NO(g) = 0.0021 M; N₂ = O₂ = 0.239 M.
What is the value of Ke at this temperature?
Select one:
O a.
27.2
O b.
7.7 x 10-5
O c.
3.7 x 10-²
d.
1.3 x 104
O e. 8.8 x 10-3
Propane boils at -42C. Octane boils at 126C Which is a gas at the freezing point of water?
The substance which is a gas at the melting point of water is the gas propane.
What is freezing point?The term freezing point refers to the point at which a liquid turns to solid. It is often the temperature as the melting point.
Thus, the substance which is a gas at the melting point of water is the gas propane.
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[Co(H2O)6]2+ what is the name
At what temperature will 13.2 grams of neon gas occupy 12.30 liters at 1.95 atmospheres? Answer
Net ionic equation for Calcium hydroxide reacting with ammonium Chloride?
Answer:
Ca(OH)₂ (aq) + 2NH₄Cl (aq) → CaCl₂ (aq) + 2NH₃ (g) + 2H₂O (l)
Ca²⁺ + 2OH⁻ + 2NH₄⁺ + 2Cl⁻ → Ca⁺² + 2Cl⁻ + 2NH₃ (g) + 2H₂O (l)
2OH⁻ + 2NH₄⁺ → 2NH₃ (g) + 2H₂O (l)
Explanation:
ca (OH)2 + 2NH4CL------> CACL2 + 2NH3 + 2H2O
At 20°C, the volume of chlorine gas is
15dm3. Compute the resulting volume
if the temperature is adjusted to 318K
provided that the pressure remains
the same.
Given:
Unknown:
Formula:
Solution:
Final Answer:
Solving typed question by you
20°C=293KApply charles law
V1T2=V2T115(318)=293V2V2=16.27dm³Answer:
See below ~
Explanation:
Typed question
Given :
T₁ = 20 °C = 293 KV₁ = 15 dm³T₂ = 318 KUnknown :
V₂Formula :
V₁/T₁ = V₂/T₂Solution :
15/293 = V₂/318V₂ = 318/293 x 15V₂ = 1.09 x 15V₂ = 16.35 dm³Final Answer :
16.35 dm³Question 3 (in attachment)
Given :
V₁ = 600 mLP₁ = 700 torrV₂ = 600(1 - 1/3) = 600(2/3) = 400 mLUnknown :
P₂Formula :
P₁V₁ = P₂V₂Solution :
700 x 600 = P₂ x 400P₂ = 600/400 x 700P₂ = 1.5 x 700P₂ = 1050 torrFinal Answer :
1050 torrWhat is the ionic equation of a neutrilisation reaction?
Answer:
A salt is a neutral ionic compound. Let's see how a neutralization reaction produces both water and a salt, using as an example the reaction between solutions of hydrochloric acid and sodium hydroxide. The overall equation for this reaction is: NaOH + HCI → H2O and NaCl.
Explanation:
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[tex]\\ \orange{MaggieEve}[/tex]
What is the boiling point of c
Answer:
90 degree is the boiling point of c
Which do you predict to have the greater electron affinity, Na or Na+ ? And why?
