Questions Asked on
January 30, 2020

Chemistry
Calculate the enthalpy change for the reaction: Zn (s) + S (s) + 2 O2 (g) → ZnSO4 (s) ΔH = ? kJ by using the following data: Zn (s) + S (s) → ZnS (s) ΔH = –206.0 kJ ZnS (s) + 2 O2 (g) → ZnSO4 (s) ΔH = –776.8 kJ My answer is 982.8 but I'm not
asked by Jack 
Chemistry
Calculate the oxidation number of sulphur in AL2(SO4)3
asked by Abdul 
English
What does the phrase not yet! in quiet lie suggest in the poem "Daybreak"
asked by Md imran 
chemistry
The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol. In the presence of a catalyst at 37°C, the rate constant for the reaction increases by a factor of 2.50 ✕ 103 as compared with the uncatalyzed reaction. Assuming the
asked by joe 
Economics
Which phrase best defines scarcity? A. a state in which productive resources are not enough to create a given good or service B. a state in which human wants are greater than the resources available to fill those wants C. a state in which too few choices
asked by Arci 
English
Read this passage from Act 1, Part 7, of The Crucible. ABIGAIL: I want to open myself! (They turn to her, startled. She is enraptured, as though in a pearly light.) I want the light of God, I want the sweet love of Jesus! I danced for the Devil; I saw him;
asked by nini 
English
Read the passage from Chapter 1, Part 2, of Little Women. Amy followed, but she poked her hands out stiffly before her, and jerked herself along as if she went by machinery, and her “Ow!” was more suggestive of pins being run into her than of fear and
asked by nini 
Math
From two points A and B, 43m apart and on the same horizontal line with the foot C of an electric pole, the angles of elevation of the top of the pole are 24 degree and 37 degree respectively. Find the heights of the pole
asked by Aanuoluwa 
math
The equation 4y = 9x represents a proportional relationship. What is the constant of proportionality?
asked by kam 
calculus
1. Find the average value have of the function h on the given interval. h(x) = 2 cos4(x) sin(x), [0, π] 2. Consider the given function and the given interval. f(x) = 6 sin(x) − 3 sin(2x), [0, π] (a) Find the average value fave of f on the given
asked by Anonymous 
Math
Find the surface area of a square pyramid with a length of 5 cm and slant height of 8 cm. A. 80 cm B. 105 cm C. 200 cm D. 145 cm I've tried different variations and formulas but they don't match my answer choices. Please help me solve this!
asked by Tessa 
social studies
What became a challenge for humans when adopting an agricultural lifestyle?
asked by mia 
calculus
1. Find the volume V of the solid obtained by rotating the region bounded by the given curves about the specified line. y = ln(5x), y = 1, y = 3, x = 0; about the yaxis 2. Use the method of cylindrical shells to find the volume V generated by rotating the
asked by Anonymous 
Math
A bag contains a large number of coins. 60% are 50p coins. 20% are 20p coins. 20% are 10p coins. Find the mean and the variance of the values of this population of coins.
asked by Hello 
Programming
2. Boardman College maintains two files—one for Sociology majors and another for Anthropology majors. Each file contains students' ID numbers, last names, first names, and grade point averages. Each file is in student ID number order. The college is
asked by Michael 
Chemistry
If 3.15g of mercury oxide are thermally decomposed to mercury and oxygen, what mass of oxygen Will be produced?
asked by Sofia 
Math
Q: How could the function y=3t^2 +4 be plotted on a cartesian graph to produce a straight line? What would be the numerical values of the slope and the intercept of the line? For this it's explained in the lab book for physics as if the function is y=mx+b
asked by Tris 
US History
Question 3 Read this excerpt from the Declaration of Independence, which is a primary source: We, therefore, the Representatives of the united States of America, in General Congress, Assembled, appealing to the Supreme Judge of the world for the rectitude
asked by imskeezyjohhnyyyy🤡 
Chemistry
In the decomposition of CaCO3 a gas is produced: CaCO3 (s) → CaO (s) + CO2 (g). Predict the change in entropy for this reaction. The predicted change in entropy would be: a. ΔS < 0 b. ΔS = 0 c. ΔS > 0 d. Enthalpy required My answer is c but could
asked by Jack 
Chemistry

Counseling
What can i studie
asked by Belinda Manxoyi 
Math
Solve the formula A = 2πrh + 2πr2 for h i have no idea what it means.\, if anyone could help that would be amazing, thanks
asked by hi need help @ 3 am 
spanish
can someone check these? 7. ....el carro A. Lavo* B. Me Lavo 8. ....los dientes. A.Cepillo B. Me Cepillo * 9. ....al niño. A. Acuesto * B. me acuesto 10. ...a un amigo. A. Llamo * B. me llamo 11. ....Roberto. A.Llama B. Se llama *
asked by john 
Geography
In what ways did the geography or Arkansas influence both settlements and cultural development of the Mississippi Alluvial Plains and the Ozark Mountains regions
asked by 😂 
Social Studies
Which of the following are constitutional officers? Select all that apply. secretary of state attorney general governor lieutenant governor Please help me!!
asked by YOUR SAVIOR 
math
The perimeter of a rectangular piece of plastic is 30 millimeters. The piece of plastic is 5 millimeters tall. How wide is it?
asked by breanna 
Scienceplz help
which of the following show the correct order from smallest to largest a community  organism  populationecosystem b organism population community organism c populationecosystem communityorganism d organism communityecosystempopulation
asked by Melanie 
pre algebra
can someone please tell me the STEPS (Not just the answer, cause this doesn't make any sense to me) to simplifying this equation: (6x^2)^2(0.5x)^4 thank you :)
asked by howdy 
Algebra
What is the volume of the triangular prism to the nearest whole unit? Height = 3 ft Width = 15 ft Length = 16 ft A. 360 ft B. 240 ft C. 1,440 ft D. 720 ft I need help ASAP
asked by pineapple16 
Science
Anyone have any good articles on the relationship between photosynthetic bacteria and oxygen levels in the sea? Thanks.
asked by aDaline 
Journalism
the first amendment only applies to those who write for newspapers True false ****
asked by sam 
Algebra 2
Simplify the expression where possible. (x 2y 3z 4) 2
asked by Taylor 
Social Studies
Hi! Help! Please check 1. Which of the following were the three main parts of Athenian democratic government? A) The Congress, the Council, and the Assembly B)The House of Representatives, the President, and the Assembly C)The Assembly, the Courts, and the
asked by LittleMissMoonlight 
geometry
Use the following lines to answer the question. line g: y=−45x+75 line h: y=54x+34 Is line g perpendicular to line h? Why or why not? Yes, because the slopes of lines g and h are opposite and the yintercepts are different. Yes, because the slopes of
asked by PLEASE HELP ME 
Math
Yolanda has 4 1/4 cups of flour. She needs 1 2/3 cups of flour to make a batch of cookies. How many cookies can Yolanda make with the flour she has?
asked by Emily 
science
A ball is thrown with a speed of 100m/s attain the height of 150m, (take g=10m/s^2). calculate... (i)Time of flight (ii)Angle of projection (iii)Range???
asked by Horpeyemmy 
History
What is one way the Romans were able to conquer such a large territory? A. They would not often trade with other cultures. B. They won military battles including the Punic Wars. C. They used the phalanx as a military formation. D. They refused to borrow
asked by IT KHALIYAH 
Math
A random sample M1, M2,M3...M8 is taken from a population with unknown mean x. For each of the following, state wether or not it is a statistic, giving your reasons: a) (M3+M8)/2 b) (Summation of Mi)/n
asked by Yo 
Maths
87392 nearest 1000
asked by Zimbini Sonjica 
Maths
Find to the nearest degree, the size of each angle of a regular haptagon (seven sides)
asked by Emman 
Math
One window washer can wash 30 windows in 2 hours. At this rate, how many windows can be washed in 8 hours by 3 window washers?
asked by Kylie 
English
In a paragraph, compare and contrast any two of the following forms of poetry:Concrete,Haiku, or Limerick Your essay should include a specific description of each of the two forms you choose. Explain how the two forms are alike and how they are different.
asked by Brooklyn, I´m A Boy 
math
using the points (3,1) and (1,3) write an equation in slopeintercept form i keep coming up with y=2x+6 but the back of my math book says its y=2x+5....am i wrong or is the book wrong? if im wrong plz show me the steps so i can compare them to my work
asked by anime_is_cool 
Economics
The third term gp is 9 and the fith term is 16. What is the fourth term
asked by Dakup godwin 
math
Five kids and two adults are going to the circus. Kid's tickets are on sale for only half of the adult tickets. The total cost is $50. How much is one kids ticket? How much is one adult ticket?
asked by Bobbie 
math
Faye wants to know how tall her school building is. On a sunny day, she measures the shadow of the building to be 6 feet. At the same time, she measures the shadow cast by a 5 foot statue to be 2 feet. How tall is her school building? I don't understand
asked by Help please 
algebra
Matrices are used in many ways that you may not even realize. They are used in most scientific fields and computer graphics. Matrices can also be used to deliver coded messages. In this portfolio you are going to work on decoding a secret message that
asked by Kitty 
Math
17. Find the value of X,Y, And Z A. x = 54; y = 126; z = 28 B .x = 82; y = 75 ; z = 28 C. x = 82; y = 98 ; z = 0 D. x = 82; y = 98 ; z = 28 Needs Help
asked by Connexus from PHX 
Math
A random sample M1, M2,M3...M8 is taken from a population with unknown mean x. For each of the following, state wether or not it is a statistic, giving your reasons: a) (M3+M8)/2 b) (Summation of Mi)/n
asked by Euler 
English
Plz help!!! Which of the following elements should be included in your argument essay? Select the two correct answer. A. a narrative with plot line B. a main claim about your topic C. graphics such as charts and tables D. detailed description of people and
asked by Beyoncé is my queen 
social studies
PLZ HELP!! I REALLY NEED IT!!!! What is the caste system? How does it result in social inequality?
asked by someone that needs and gives help 
Social Studies
What effect did the Fugitive Slave Act have? Select all that apply
asked by Unknown Void 
Math
A scientist reports a set of experimental results with 97% confidence. The results state that 8286% of epithelial cells were killed by the bacterial treatment he administered. What is the margin of error for the scientist's results? Enter your answer as a
asked by Emily 
Journalism
why is it hard for journalist to write a piece if she conflict of interest A she will not be as objective B she will want to include the names of her friends C she will know too much about the story******** D she will get paid for the story
asked by Ava 
science
What effort should be applied to raised a load of 800n
asked by Christopher dav 
Physics
On an inclined plane is Gravitation Force of x component (Fgx) always equal to static friction (fs)?
asked by Anonymus 
math
what is 5{3m+n}.
asked by matthew 
Science
Hi everyone. Can you please help me? Here it is: When a plant is planted with everything it needs to grow (nutrients, water, light), it will continue to grow throughout its lifetime by producing new plant material (plant cells). My answer: I think this
asked by LittleMissMoonlight 
journalism
why is acting lawfully and ethically important for journalists A it helps journalists remain credible B it keeps people focused on the fact in the news C it helps people stay safe D all of the above*****
asked by sam 
Writing
letter to my uncle telling him to asist me for my school fees
asked by vivian 
Science/biology
My question: Photosynthesis is required for plants to grow new cells. My answer: I think this statement is true because Photosynthesis is how a plant makes food. When you eat food (when you're a child) you grow. Like a plant. The plant creates food, and
asked by LittleMissMoonlight 
Social Studies
The Industrial Revolution is best defined as a Time of great excitement about mechanical approaches to controlling Nature. Period of turmoil and upheaval within the United States government. Series of explosive encounters between workers and wealthy
asked by Blank 
Social Studies
What effect did Nat Turner's Rebellion of 1831 have on southern society? More whites began hiding fugitive slaves Many slaveholders freed their slaves. Open slave revolts increased dramatically**** People stopped discussing rebelling against slavery
asked by Blank 
Social Studies
How did the Second Great Awakening impact society in America? It led to increased alcohol consumption and alcohol abuse. People believed their lives were predestined and that there was nothing they could do to attain salvation. It led to an increase in
asked by Rull 
math
Which pairs of expressions are equal? Select two answers. A. 3 ( x + 2 ) + 4 x and 7 x + 6 B. 2 ( x + 3 ) + 2 x and 4 x + 3 C. 5 ( x – 1 ) + 6 and 5 x + 5 D. 8 + 4 ( x + 1 ) and 4 x + 12 E. 4 + 5 ( x − 2 ) and 3 x + 4
asked by fin fox 
history
Why is Alexandria a site encounter.
asked by Cart 
science
Due to its ability to camouflage itself from predators, the White Peppered Moth of England was once much more abundant than the Black Peppered Moth. As the Industrial Revolution hit, factories began to release black soot which coated everything, including
asked by eli 
Science
The natural shifting of a river’s course has caused the river to separate into two branches. One branch continues in the river’s previous course. The other branch takes a new route across the land. Eventually, it empties into the ocean. Which landform
asked by LetsBeLonelyTogether 
Math
An aeroplane leaves a point on latitude 54'S at 10a.m it flies due south at a steady speed of800kmh.a.what is it's latitude at mid day?b.At what time does it pass over the South Pole
asked by Victoria 
social studies
Which of the following are the main factors that led to World War I? Select the two correct answers. A. the rise of fascism in some European countries B. the invention of nuclear weapons and disagreement over their use** C. the assassination of Archduke
asked by name 
Math
It his last track make Carl ran the 100 meter dash in 13.4 seconds. What was his approximate rate of speed for the race
asked by Elizabeth 
Math
Ryan's Bike tire made 3,549 revolutions in 42 minutes this morning at what rate did the bike tire turn?
asked by Elizabeth 
Science
Hawaii has a warm, wet, tropical climate. Which of these is most likely to break down newly formed rock in Hawaii? root wedging salt wedging frost wedging abrasion I honestly have no clue but my guess is root wedging??
asked by LetsBeLonelyTogether 
geometry
Line CD passes through point E. Line CD: y−5=−3(x+2) Point E: (6,−1) What is the equation of the line that is perpendicular to line CD? y=1/3x−4 y=−1/3x−19/3 y=−1/3x+5 y=−1/3x+19/3 y=1/3x+4
asked by PLEASE HELP ME 
science
Heat and pressure deep beneath Earth’s surface can change any rock into A. chemical rock. B. gemstone. C. metamorphic rock. D. sedimentary rock. pls help
asked by Jordyn 
Math
Given that the indicated lines in the figure below are parallel, determine the sum of a+b+c without measuring the angles. Explain your reasoning in the style of a twocolumn proof.
asked by Zed 
English
To finish her environmental science research project, Giselle is compiling her data on the increase in popularity and use of solar energy. Which organization and style would be MOST appropriate to the task, purpose, and audience? A) a persuasive essay to
asked by Me 
Physics
A ball of mass 8kg at what hight above the ground must a body of mass 10kg be pesuated in other to have potential energy equal in value to the kinetic energy pocess by another body of mass 10 kg moving a velocity of 10m/s
asked by Anonymous 
algebra
For 9x + 25 = 88, Deena wrote the situation “I bought some shirts at the store for $9 each and received a $25 discount. My total bill was $88. How many shirts did I buy?”
asked by Erick 
English
Excerpt from The Care and Keeping of Big Cats Part B Kate McConnaughey Like all other animals in captivity, zoo animals require occasional trips to the vet. The veterinarians that handle zoo animals are specially trained in exotic medicine, the diseases
asked by Me 
geometry
PLEASE HELP I AM ON A GEO EXAM. Line f has a slope of −6/3, and line g has a slope of −8/4. What can be determined about distinct lines f and g? A. The lines have proportional slopes. B. The lines will intersect. C. The lines are parallel. D. Nothing
asked by Brett 
Technology
Lesson 1: technology for publishing In what stage of writing does publishing occur?
asked by 😎 
Programming
public class FutureInvestmentValue { public static void main(String[] args) { Scanner input= new Scanner (System.in); System.out.print("Enter investment amount: "); double investmentAmount = input.nextDouble(); System.out.print("Enter annual interest rate:
asked by anonymous 
geometry
Use the following lines to answer the question. line g: y=−4/5x+7/5 line h: y=5/4x+3/4 Is line g perpendicular to line h? Why or why not? A. Yes, because the slopes of lines g and h are opposite and the yintercepts are different. B. Yes, because the
asked by Brett 
history
who was Julius Caesar's grandnephew
asked by malin 
geometry
Line CD passes through point E. Line CD: y−5=−3(x+2) Point E: (6,−1) What is the equation of the line that is perpendicular to line CD? y=1/3x−4 y=−1/3x−19/3 y=−1/3x+5 y=−1/3x+19/3 y=1/3x+4 Answer i think is either the first one or last one
asked by PLEASE HELP ME 
English
Part 2: Identify and correct the sentence structure errors in the following sentences (5 marks). 1) The comedian was very funny I couldn’t stop laughing. Error: Revised: 2) I love superhero movies. Like Iron Man and The Avengers. Error: Revised: 3) I was
asked by please help 
English
Part 1: Identify both the independent clause and subordinate clause in the following sentences (4 marks). 1) After a long day of skiing, we returned to the cabin for a cup of hot chocolate. Independent clause: we returned to the cabin for a cup of hot
asked by please help 
math
An aquarium holding African cichlids is 2 inches higher than it is wide. Its length is 25 inches, and its volume is 9000 cubic inches. What is the height and width?
asked by Anonymous 
math
Find two consecutive odd integers such that their product is 39 more than 9 times their sum.
asked by Anonymous 
math
The dimensions of a rectangle are such that its length is 3 in. more than its width. If the length were doubled and if the width were decreased by 1 in., the area would be increased by 176 in.squared. What are the length and width of the rectangle?
asked by Anonymous 
Math
Which expression is equivalent to 5(y + 3) + 9? A) 5y + 15 + 9 B) 5y + 8 + 9 C) 5y + 3 + 9 D) 5y + 15 + 45
asked by ally 
math
Find two consecutive odd integers such that their product is 39 more than 9 times their sum?
asked by Anonymous 
US history
Which of the following sources would be best to consult for a summary of historical events in either printed or digital format? A. a research paper B. an encyclopedia C. an archive D. an autobiography
asked by imskeezyjohhnyyyy🤡 
math
Find two consecutive odd integers such that their product is 31 more than 2 times their sum?
asked by Anonymous 
chemistry
The activation energy for the reaction given below is 125 kJ/mol, and ΔE for the reaction is 216 kJ/mol. NO2(g) + CO(g) NO(g) + CO2(g) What is the activation energy for the reverse reaction [NO(g) + CO2(g) NO2(g) + CO(g)]?
asked by joe 
Math
You cut a loaf of bread into 20 equal slices. You and your friends eat 3/10 of the slices. You want to put each leftover slice into its own bag. How manh bags do you need?
asked by Adam 
math
why is factions so hard
asked by skyah