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Questions (18)
Is the following reaction endothermic or exothermic?
C3H8 + 5 O2 --> 3 CO2 + 4 H2O H= -2200 kJ endothermic exothermic
3 answers
162 views
Find the molality of the solution if 2.5 moles of CaBr2 are dissolved in 5 kg of water.
2 m 500 m 5 x 10-4 m 0.5 m
11 answers
98 views
In the following reaction, HS-(aq) + H2O(l) â S2-(aq) + H3O+(aq)
HS- is an acid and H2O is its conjugate base. H3O+ is an acid
1 answer
116 views
In the following equation, which species is the oxidizing agent?
SiO2(s) + 2C(s) â Si(s) + 2CO(g) SiO2 C O Si
11 answers
168 views
When does the boiling point of a liquid occur?
when the vapor pressure of the liquid equals the atmospheric pressure only when a
5 answers
161 views
All monatomic ions have oxidation numbers equal to what?
the number of electrons the difference of protons and neutrons the
7 answers
140 views
(4x+7)-T
(7x-38)-S what is R? 118 113 125 107
1 answer
69 views
If CJW is congruent to AGS, m<A=50, m<J=45, and <S=16x+5 what is the value of x?
17.5 6 11.875 5
7 answers
104 views
Given the statement If there is an accident then the traffic is backed up. Which of these contrapositive of this statement.
Accid
1 answer
187 views
Given the statement If there is an accident then the traffic is backed up. Which of these is the inverse of this statement.
f the
1 answer
123 views
If each interior angle of a regular hexagon measures (13x+3), find the value of x.
3 answers
106 views
Y is the midpoint of segment XZ. XY = 5x and YZ = 2x+21. Find XY
15 7 70 35
7 answers
80 views
Given the statement If there is an accident then the traffic is backed up. Which of these is the converse of this statement.
Acci
1 answer
119 views
A triangle has angle measurements of 27 degrees
and 24 degrees . What kind of triangle is it? right and isosceles acute and
5 answers
115 views
.
From the story Seabiscuit, why did Howard feel it was such a risk to let Seabiscuit race in the rain? Howard believed it was
1 answer
128 views
Mankindâs âidealâ of beauty has drastically changed over different periods of time.
true false
5 answers
104 views
In the story Holes, having a narrow perspective often limits us from seeing the âbigger picture.â
true false
23 answers
128 views
In Gandhi, His Life and Message to the World, what proved that Gandhi was willing to take responsibility for his actions?
He
17 answers
153 views
Answers (44)
You are performing an experiment that uses 113Ag. 113Ag is radioactive, decays by beta-minus emission and has a half-life of 5.3 hours. It requires 31.8 hours to ship the material from the warehouse to your laboratory. How many grams should you order if
A new planet is discovered. What elements do you expect it to be composed of? new elements that havenât yet been discovered the same elements Earth and other planets are made up of only hydrogen and helium there is not enough information to tell
What is the molarity of a solution that contains 125 g NaCl in 4.00 L solution? (molar mass of NaCl = 58.44 g/mol) 31.3 M 2.14 M 0.535 M 8.56 M
0. Is the following reaction endothermic or exothermic? H2 + Br2 --> 2 HBr H= +72.8 kJ endothermic exothermic
In the equation NaHCO3 + HCl â NaCl + H2CO3, what is the conjugate acid? NaHCO3 HCl H2CO3 NaCl
What is the mass of 8 atoms of copper in grams? 63.5 g 7.58 x 1022 g 1.33 x 10-23 g 8.44 x 10-22 g
At 7.0°C, the volume of a gas is 49 mL. At the same pressure, its volume is 74 mL at what temperature? 150°C 3.0°C 120°C 423
The temperature is how much force is exerted when the molecules hit the container wall. how hot or cold an object is. a measure of the average velocity of the molecules. gas pressure above a liquid at equilibrium.
What is the pressure exerted by 1.2 mol of a gas with a temperature of 20°C and a volume of 9.5 L? 3 atm 30 atm 0.030 atm 1 atm
2.40 x 102 g 0.625 g 2.56 x 103 g 6.67 g
You are performing an experiment that uses ^113Ag. ^113Ag is radioactive, decays by beta-minus emission and has a half-life of 5.3 hours. It requires 31.8 hours to ship the material from the warehouse to your laboratory. How many grams should you order if
64°C 78°C 100°C 101.3°C
What is the boiling point of CHCl3if the atmospheric pressure on the surface of the liquid is 50 kPa?
All monatomic ions have oxidation numbers equal to what? the number of electrons the difference of protons and neutrons the difference of protons and electrons the number of protons
well it has to be one of the answer choices
are you sure?
what does the data set say?
so which one?
Given the triangles, name one additional pair of corresponding parts that need to be congruent in order to prove that triangle ABC is congruent to triangle GEF by SAS.
thats all the info im given
15 7 70 35
it cant be 73 because the choices where 15 7 70 35
how?
In To Kill a Mocking Bird, it is not always easy to remain in control of our emotions. true false
In Manâs Search for Meaning, the author, Dr. Frankl, feels that positive aspects could be found in negative situations rarely any situations most situations, including negative ones positive situations
Normal teenage things going on in her life
so which one is right?
her deepest fears and secrets
normal teenage things going on in her life
her deepest fears and secrets
. In Amanda and the Wounded Birds, what does Amanda want to talk to her mom about? normal teenage things going on in her life going to the prom her deepest fears and secrets her (Dr. Hartâs) work and clients
In the story Stargirl, Hillari Kimball is the only real friend Stargirl has. true false
In A Long Way from Chicago, most people have the same perspective when sharing an experience. true false
In the Hiding Place, what was the main purpose of the drills? to see how quickly the house could prepare when a raid was expected to pacify Pickwick, who was overprotective for the household members to make light of their situation and treat the drills
In The Autobiography of Helen Keller, Helen was able to pick up sign language as soon as it was introduced to her. true false
. In the Hiding Place, the Ten Boom household had to be extremely thorough in hiding evidence of their âunacknowledgedâ house guests. true false
In Kaffir Boy, why was Markâs father against his sonâs schooling? He would rather see his daughters educated first. He wanted to see his son home schooled. Being illiterate himself, he did not see what Mark could gain from school. He wanted his wife to
In To Kill a Mockingbird, how did Atticus justify Mrs. Duboseâs behavior? It was what his deceased wife would have wanted. Mrs. Dubose held a high position in society. Mrs. Dubose was old and ill. Mrs. Dubose was a distant relative of Atticus.
In Kaffir Boy, what gave Mark a change of heart about attending school? After talking to his mother, Mark realized how important it was to her that he attended school. He doesnât have a change of heart in this excerpt. His father had a change of heart
so Mark could stand up against his father
In Kaffir Boy, why did Markâs mother want him to have an education? so Mark could have a different life from his parents so Mark could stand up against his father so Markâs family could get money from the government so Mark could become rich
She wrote him a letter explaining that she had seen what he had done.
In Educating Esmé, what did Esmé do when she recognized one of the boys throwing rocks at the school bus? She confronted him and asked him to admit what he had done. She went to the principal and reported the boy. She wrote him a letter explaining that
In A Long Way from Chicago, how does the âcitifiedâ reporter gather most of his information for his article about Shotgun? He makes up his own information and âfacts.â He researches information from the local newspaper. He spends his time
