Questions and answers by

Summer

Questions (237)

At the fabric store, Mrs. Hollern bought different amounts of ribbon to make hair bows. The table shows the amount of each type
1. 1 answer
2. 147 views
i need to describe a desolate rock to my feelings how can i describe that in a simile metaphor or more ??
1. 0 answers
2. 161 views
ELA Unit 6B Comparing Texts 2 PortfolioI NEED HELP GUYS!
1. 22 answers
2. 982 views
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Find the area of the
1. 3 answers
2. 484 views
The sum of two numbers is 19 and their difference is 3.
1. 2 answers
2. 420 views
-3y -9 if y equals 8
1. 1 answer
2. 239 views
What aspect of Washington’s location does the Peace Arch monument stand for?A. The Peace Arch commemorates the victory over
1. 1 answer
2. 440 views
Explain 5 civic problems in the society
1. 2 answers
2. 689 views
Which type of light has the most neutral tone?Fluorescent Daylight Incandescent Shade I don’t think it is shade or
1. 3 answers
2. 1,491 views
How would I set up an equation to solve for three consecutive odd numbers that have a sum of 9
1. 2 answers
2. 334 views
I have finished the questions but i wanted to know if i am correct1) -1.8- 3.9 =5.7 2) -7.5 + 5 =-2 3) -6.1 + 1.7 =7.8
1. 1 answer
2. 241 views
You currently have 12 bottles of water on your shelf and want to keep a minimum level of 6 bottles at a time, you average sales
1. 1 answer
2. 525 views
An inelastic collision occurs between a large truck and smaller sedan. Calculate the final velocity of the objects and explain
1. 1 answer
2. 678 views
Why did business leaders begin the practice of vertical integration?A. Big companies could grow by merging with other companies
1. 1 answer
2. 1,399 views
Suppose a tree on your land has a radius of 3 inches and increases in radius one-fourth inch a year. How many years, y, to the
1. 1 answer
2. 753 views
According to an article by Thomas H. McMahon in the July 1975 issue of Scientific American, a tree’s height varies directly
1. 1 answer
2. 773 views
If the pH of a Ca(OH)2 solution is measured as 9.0, what is the concentration of the Ca(OH)2 solution?1 × 10-5 M 1 × 10-9 M
1. 1 answer
2. 501 views
8 grams of C3H4 gas occupies a volume of 8.2 L at 300 K temperature. Assume ideal gas behavior. The ideal gas constant is 0.082
1. 1 answer
2. 868 views
?? ==> 15/7 N + 0/-1 eWhat is the reactant for this equation? 15/6 C 16/5 B 14/6 C 14/5 B
1. 1 answer
2. 387 views
1125 J of energy is used to heat 250 g of iron. After heating, the final temperature of the iron is measured as 55 °C. The
1. 1 answer
2. 731 views
C(g) + 2A(g) ⇌ 3E(s) + 2F(g)The concentrations of C, A, and F are measured as 0.2 M, 0.2 M, and 0.4 M at equilibrium and at
1. 1 answer
2. 444 views
If 10.0 g of substance X dissolved in 100 mL of solution, and the molarity of the solution is 1.0 M, what is the molar mass of
1. 3 answers
2. 665 views
During a titration experiment, a 130.0 mL solution of 0.02 M hydrogen chloride (HCl) is neutralized by 100.0 mL of unknown
1. 5 answers
2. 814 views
H2SO4(aq) + 2LiOH(aq) → Li2SO4(aq) + 2H2O(l)3.2 moles of LiOH enter the reaction and are fully consumed. The molar mass of
1. 4 answers
2. 2,186 views
X(g)+ 2Y(s) + 3Z(g) ⟶ 2L(g) + 4T(g)If this reaction occurs in one step, what is the order of this reaction? I am not even sure
1. 1 answer
2. 705 views
If 44.25 kJ of heat are released by changing 150. g of liquid mercury to mercury vapor,what is the latent heat of vaporization
1. 1 answer
2. 575 views
A straight-chain alkene with seven carbons has two double bonds and one bromine atom bonded to one of the carbons.Which option
1. 4 answers
2. 872 views
If the standard cell potential of zinc-copper cell is 1.10 V and the reduction potential of Cu is 0.34 V, what is the reduction
1. 1 answer
2. 608 views
If 44.25 kJ of heat are released by changing 150. g of liquid mercury to mercury vapor,what is the latent heat of vaporization
1. 1 answer
2. 604 views
Li^+(aq) + Zn(s) → Li(s) + Zn^2+(aq)How many electrons are transferred in the balanced equation? I came up with an answer of
1. 1 answer
2. 511 views
Which reaction is NOT a redox reaction?CH4+2O2=CO2+2H2O 2Na+CI2=2NaCI AgNO3+NaCI=AgCI+NaNO3 KCIO3=KCI+3/2O2 I chose,
1. 6 answers
2. 734 views
Silicon is an element that is directly below carbon on the periodic table. Silicon can form bonds similar to carbon.Silicon-sili
1. 1 answer
2. 974 views
Which of the following six-carbon molecules can be a straight-chain alkyne with two triple bonds and no double bonds?C6H4 C6H6
1. 1 answer
2. 848 views
A hydrocarbon consists of a benzene ring and two methyl groups. The methyl groups are located at opposite carbons and the
1. 1 answer
2. 1,190 views
Which formula represents a 5-carbon hydrocarbon ring with one double bond?C5H12 C5H5 C5H8 C5H7 I chose C5H8, is this correct?
1. 2 answers
2. 1,137 views
I. C(s) + O2(g) → CO2(g)ΔHf = −394 kJ II. H2(g) + O2(g) → H2O(l) ΔHf = −242 kJ III. 2C(s) + 3H2(g) → C2H6(g) ΔH
1. 1 answer
2. 946 views
Ammonia (NH3) ionizes according to the following reaction:NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH–(aq) The base dissociation
1. 1 answer
2. 2,793 views
NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/molAt 25 °C, this reaction has a ΔG° of 91.1 kJ/mol. What is the ΔS° of this
1. 4 answers
2. 3,067 views
CH4 + Cl2 → CH4Cl + HClIs this a double replacement reaction? I believe it is but am not entirely sure.
1. 2 answers
2. 2,077 views
Which reaction is a redox reaction?1. HCI+H2O=H3O^+ +CI^- 2. H2SO4+2KOH=K2SO4+2H2O 3. CH4+2O2=CO2+2H2O 4. Fe^2+ +2OH^- =Fe(OH)2
1. 1 answer
2. 2,114 views
Al(s) + MnO2(s) → Al2O3(s) + Mn(s)When this reaction is balanced, how many electrons are transferred in each half-reaction?
1. 1 answer
2. 2,712 views
Study the two half reactions of an electrochemical cell.Ag(s) → Ag^+(aq) + e^– E^0 = 0.80 V Cu(s) → Cu^2+(aq) + 2e^– E^0
1. 2 answers
2. 669 views
KMnO4 + HCl → MnCl2 + Cl2 + H2O + KClIf the reaction occurs in an acidic solution where water and H+ ions are added to the
1. 2 answers
2. 1,688 views
MnO4^– + SO3^2– + H2O → MnO2 + SO4^2– + OH^–If the reaction occurs in an acidic solution where water and H+ ions are
1. 4 answers
2. 1,711 views
NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/molAt 25 °C, this reaction has a ΔG° of 91.1 kJ/mol. What is the ΔS° of this
1. 1 answer
2. 1,902 views
2A + 3B + C ⟶ D + EThe rate constant for this reaction is 0.25, and the reaction is second order in A and is first order in B
1. 3 answers
2. 929 views
H2(g) + I2(g) ⇌ 2HI(g)The concentration of H2, I2 and HI are measured as 0.04 M, 0.08 M and 0.12 M at equilibrium and 200 K.
1. 1 answer
2. 842 views
Ammonia (NH3) ionizes according to the following reaction:NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH–(aq) The base dissociation
1. 1 answer
2. 885 views
Iron fluoride (FeF2) dissociates according to the following equation:FeF2(s) ⇌ Fe^2+(aq) + 2 F^–(aq) A sample of iron
1. 3 answers
2. 1,985 views
CH3COOH(aq) + H2O(l) ⇌ H3O^+(aq) + CH3COO^–(aq)[H3O^+] = 4.0 × 10^–3 M [CH3COOH] = 0.90 M What is the Ka value for the
1. 1 answer
2. 1,929 views
Ammonia (NH3) ionizes according to the following reaction:NH3(aq)^+ H2O(l) ⇌ NH4^+(aq) + OH^–(aq) The base dissociation
1. 1 answer
2. 1,018 views
NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/molAt 25 °C, this reaction has a ΔG° of 91.1 kJ/mol. What is the ΔS° of this
1. 2 answers
2. 683 views
Which of the given conditions leads to a negative free energy value (spontaneous reaction)?1. Highly positive enthalpy and
1. 2 answers
2. 1,336 views
Zinc fluoride (ZnF2) dissociates according to the following equation:ZnF2(s) ⇌ Zn2+(aq) + 2F–(aq) Ksp of this equilibrium is
1. 2 answers
2. 2,571 views
Calcium fluoride (CaF2) is a slightly soluble salt, which dissociates in water according to the following reaction:CaF2(s) ⇌
1. 1 answer
2. 1,523 views
A 0.2 M KOH solution has a volume of 3 L.What percent of water should be evaporated to obtain a 0.6 M KOH solution? The answer I
1. 1 answer
2. 614 views
During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an
1. 1 answer
2. 1,787 views
The solubility of sugar is 204 g/ 100 g water at 20 °C.How many grams of water are needed to dissolve 612 grams of sugar at the
1. 3 answers
2. 3,858 views
A 200 mL NaCl solution with a concentration of 4.0 g/L is mixed with a 600 mL solution containing 8% NaCl (m/v).What is the
1. 3 answers
2. 1,658 views
H2SO4(aq) + H2O(l) ⟶ H3O+(aq) + HSO4–(aq) (Stage I)Identify the Brønsted-Lowry acid and base in the reaction.
1. 1 answer
2. 6,214 views
2CO + O2 → 2CO2If 3.4 moles of carbon dioxide (CO2) form at the end of the reaction, how many moles of carbon monoxide (CO)
1. 6 answers
2. 2,950 views
The molarity of a sodium hydroxide solution is 0.2 M. The molar mass of NaOH is 40 g/mol.If 20 g of sodium hydroxide (NaOH) is
1. 2 answers
2. 1,251 views
During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an
1. 1 answer
2. 787 views
A 0.2 M KOH solution has a volume of 3 L.What percent of water should be evaporated to obtain a 0.6 M KOH solution?
1. 2 answers
2. 1,382 views
What is the pOH of a 5.0 ×10-5 M hydrochloric acid (HCl) solution at 25° C?
1. 1 answer
2. 1,578 views
A pool is filled with 24.0 liters of a chlorine-water solution with 8.00 ppm of chlorine.How many milligrams of chlorine are in
1. 4 answers
2. 3,083 views
What is the relation between pH and pOH? Is the relation positive, negative or neutral?
1. 2 answers
2. 558 views
A sample of argon at 2.0 atm pressure is heated until its temperature is raised from 60 °C to 90 °C. The pressure of the gas
1. 3 answers
2. 1,457 views
3.2 grams of CH4 gas applies 760 mmHg pressure at 273 K temperature. Assume ideal gas behavior. The ideal gas constant is 62.36
1. 10 answers
2. 1,320 views
Does water have a stronger intermolecular force than liquid ethanol?
1. 3 answers
2. 783 views
Use the heating curve of 50 g of water and the list of values to answer the question.specific heat of ice = 2.10 J/(g·°C)
1. 5 answers
2. 2,626 views
742.5 J of energy is used to heat an unknown mass of aluminum from 10° C to 65.0° C. The specific heat capacity of aluminum =
1. 3 answers
2. 3,140 views
A mixture consists of 3.2 grams of CH4 gas and 1.2 grams of H2 in a steel container. The pressure inside the container is 6.0
1. 2 answers
2. 2,006 views
If the latent heat of fusion for water is 333.4 J/g, how much heat is required to melt 170 grams of ice at 0 °C?
1. 2 answers
2. 1,534 views
Study the balanced equation.3O_2=2O_3 When 4.26 x 1016 mol of oxygen (O) are converted into ozone, how many mol of the pollutant
1. 4 answers
2. 590 views
How many particles are in 9.22 x 10–37 mol of iron(III) oxide (Fe2O3)?5.55 * 10^-13 mol Fe2O3 5.54 * 10^12 mol Fe2O3 1.47 *
1. 1 answer
2. 510 views
Xe+3F_2=XeF_6How many mol of xenon hexafluoride are produced from 4.01 x 102 mol of fluorine (F2)?
1. 1 answer
2. 609 views
Study the balanced equation.3O_2=2O_3 When 4.26 x 10^16 mol of oxygen (O) are converted into ozone, how many mol of the
1. 1 answer
2. 443 views
How many mol of nitrogen monoxide gas (N2) are in a 1.49 L container at standard temperature and pressure?
1. 1 answer
2. 535 views
The procedures of an experiment state that 1.3 g of copper (Cu) should be produced. However, the scientist’s experiment
1. 1 answer
2. 615 views
If SiO_2 undergoes a double-displacement reaction with HF, what is the balanced equation?
1. 3 answers
2. 618 views
Oblique tracking. A ship leaves port traveling southwest at a rate of 12 mi/hr. at noon, the ship reaches its closest approach
1. 2 answers
2. 1,229 views
Imagine slicing through a sphere with a plane (sheet of paper). the smaller piece produced is called a radius of the sphere. Its
1. 1 answer
2. 1,130 views
Which of the following would not describe Paleo-Indian culture?A.nomadic B.hunted woolly mammoths and mastodons C.invented
1. 12 answers
2. 3,944 views
Vincent went to a pizza restaurant. A vegetable pizza costs $8 and a chicken pizza costs $12. Find an inequality to determine
1. 1 answer
2. 677 views
Mr. Feng conducted five math tests. Trinity had completed four tests and scored 79, 78, 82, and 75. She wanted to achieve an
1. 2 answers
2. 868 views
I understand that I have to use newtons laws of motion but I don't really get how to aplly them to this problem. Please help.An
1. 2 answers
2. 667 views
A jug of water is 1/2 full. If 3 children equally share the water, what fraction of the full jug does each child get?A.6 B.1/6
1. 8 answers
2. 1,850 views
Why does the u.s. Constitution limit the power of federal government?
1. 5 answers
2. 729 views
How might citizens engage in civic life to influence politics and government?Please help me with this question
1. 4 answers
2. 827 views
From the story from Joe Magarac, Man of Steel10. Why do the people in the crowd mimic and mock the man from Johnstown in
1. 1 answer
2. 1,157 views
1.Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a
1. 8 answers
2. 1,322 views
I need help understanding this problem. Can someone help me????
1. 2 answers
2. 437 views
The walrus and the CarpenderThe sun was shining on the sea Shining with all his might He did his very best to make The Billows
1. 15 answers
2. 2,779 views
1. What were the ideals of movement related to this medallion? @liberty of CongressA. abolition and suffrage B. freedom and
1. 5 answers
2. 1,416 views
1. What were the ideals of movement related to this medallion? @liberty of CongressA. abolition and suffrage B. freedom and
1. 14 answers
2. 2,585 views
Which quadric rule represents the data in the table below?A. y=-2x^2+5 B. y=-x^2+5 C. y=x^2-5 D. y=x^2+5
1. 5 answers
2. 491 views
Describe the speed of the remote-control car over time.A. The speed of the car decreases from 4 mi/h to 2 mi/h in the first 3
1. 62 answers
2. 11,803 views
What is the average caloric burn rate (in calories per hour) for a 180-lb person engaging in high-intensity interval training
1. 0 answers
2. 1,646 views
Which quadric rule represents the data in the table below?A. y=-2x^2+5 B. y=-x^2+5 C. y=x^2-5 D. y=x^2+5
1. 3 answers
2. 507 views