1. Chem1020

Sulfuric acid can dissolve aluminum metal according to the following reaction. 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 23.7 g . Sulfuric acid can dissolve aluminum metal according to the

2. Chemistry

Write mathematical equations that show how you will calculate the detected activity from the count rate due to background radiation and the sample of KCl and how you will determine the “true” activity of your sample from the detected activity. Use the

3. college maths

A property worth $15,000.00 is purchased for 10% down and semi-annual payments of$1750.00 for twelve years. What is the effective rate of interest if interest is compounded semi-annually?

4. Government

What constitutes Congress using their impeachment power on a President of the United States (for example, treason, lying under oath, committing a felony, committing a misdemeanor, or something else?)

5. Algebra2

Wind farms are a source of renewable energy found around the world. The power P (in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v (in meters per second). If a turbine generates 500kW in a 10m/s wind, how much power

7. English

1. As there was no bus service, I had to walk home. 2. There being no bus service, I had to walk home. (Are both the same and grammatical?) 3. As there was no seat on/in the bus, I had to stand all the way. 4. There being no seat on/in the bus, I had to

9. yashoda

how to calculate the heat of combustion at 300 kelvin , when the standard enthalpies are given of benzoic acid, carbon dioxide and water at constant pressure and volume

76. multiple choice

A magnetic flux through a circuit increases linearly with time, then the absolute value of the induced e.m.f A) increases because the flux is increasing B) decreases because according to Lenz's law it opposes the original increase of the flux C) stays the

77. math pls help!!!

I am a 4th grader and i need help with these problems. 1. -6f X (7-+4)9>4t

78. Language Arts

many actors travel around the country to promote _________ latest movies A.Her B.Theirs*** C.Their D.His

79. math help

Hi and good afternoon to everyone who is reading this i need help with my math if any of you guys know i site where i can learn fractions better that would be great PS. plz dont be coolmath

80. Math

An open box is to be made from a square piece of material by cutting four-centimeter squares from each corner and turning up the sides (see figure). The volume of the finished box is to be 144 cubic centimeters. Find the size of the original piece of

81. Social Studies

Throughout the 1900s, many countries in Africa and Asia gained independence from European colonial powers. India is one of these countries, having gained their independence from Britain in 1947. Why did people in India want independence? In what ways was

82. Math

Which number is a perfect cube A.3 B.15 C.65 D.567

83. Physics

query=a stone of mass 30grams is placed in a measuring cylinder containing some water. the reading of the water level increases from 50cm cubic to 60cm cubic. what is the density of the stone?

84. Science

Why are the water molecule bonds at an angle and not straight like the CO2?

85. physics

A ball is thrown vertically upwards from ground level hits the ground after 4secs, calculate the maximum hieght it reached during its journey.

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87. Chem 104

Molarity of KHP ___ moles/L with a KOH titrant

88. Social Studies

2. What is a positive affect of competition? A. Increased value for consumers B. Increased wages for workers C. Increased profits for producers D. Increased incentives for investors Is it A or C

89. physics multiple choice MCQ 1- i need help please @all respective sir & bro

which of the following variable controls the physical properties of a perfect gas? a. pressure b. temperature c. volume d. all of the above e. atomic mass

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90. physics multiple choice MCQ 2- i need help please @all respective sir & bro

which of the following laws is applicable for the behavior of a perfect gas? a. Boyle's law b. Charles' low c. Gay-Lussac law d. all of the above e. joule's law

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91. physics multiple choice MCQ 3- i need help please @all respective sir & bro

q3= The unit of temperature in S.I units is? a. Centigrade b. Celsius c. Fahrenheit d. kelvin e. Rankin

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92. physics multiple choice MCQ 5- i need help please @all respective sir & bro

The unit of time in S.I. units is? a. second b. minute c. hour d. day e. year

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93. physics multiple choice MCQ 7- i need help please @all respective sir & bro

the unit of energy in S.I units is? a. watt b. joule c. joule/s d. joule/m e. joule m

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94. Inequality quiz help CHECK ANSWERS

1. Gavin needs to read at least 150 pages of his book this week. He has already read 82 pages. How many more pages A. 82 + p >= 150; p >= 68 B. p + 82 = 222 D. p - 82 60 B. x > -60*** MY ANSWER C. x < -60 D. x < -4 3. Solve the inequality. Explain each

95. Physics

you pull your 6kg dog on a sled which has a mass of 15kg. while you are pulling at 33N, there is a 12N frictional force that is encountered. what is the acceleration of your sled and dog?

96. Louisiana History

I really need help I don't understand this. What type of economy was supported by bartering among Native Americans? a market economy b traditional economy c mercantile economy d command economy 2. Which of the following conditions made most of Louisiana an

97. Math

Tom leaves the outskirts of City A at 8 am and travels north to City B at a constant speed of 80 km/h. Cindy leaves from the same place at 8:30 am and takes the same route traveling at a constant speed of 100 km/h. At what time will Cindy overtake Tom

98. Chemistry

For the following redox reaction, give the complete reduction half reaction. Na(s) + Al+3(aq) Na+1(aq) + Al(s) Please help asap!!

99. math

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100. Algebra

In 8 months, 55.6 gallons were used. Find the unit rate. Is the answer 6.95

101. Math

A regular analog clock that doesn’t have AM or PM on it loses 7 minutes per day. It is set to the correct time. How many full days will it before it has the correct time again

102. science

Explain which is more ionic NaF or LiF

103. Math

A box contains some red balls and some blue balls. There are four more blue balls than red balls. A ball is removed at random, replaced and a second ball randomly removed. The probability that the two balls are different colours is 21/50. How many balls of

104. Algebra

The sides of a square are increased by a scale factor of 6. The perimeter of the smaller square is 10 ft. What is the perimeter of the larger square? Is 60 Ft Correct?

105. Algebra

A map of Utah has a scale of 1 cm:30 mi. The border of Utah and Wyoming measures about 3.7 cm. How long is the actual border of Utah and Wyoming? Round the answer to the nearest 10 miles. I think it's 110 mi. Am I right?

106. Math

A box contains some white balls and some blue balls. There are 5 more blue balls than white balls. One ball is removed at random and not replaced. A second ball is then removed at random. The probability that the balls are different colours is 52/105. Find

107. Algebra

Solve the proportion. Where necessary, round to the nearest hundredth. 12/3 = x/13 Is 156 right?

108. math

12, −9, 6, −3, .. whats the arithmetic function?

109. Physics

An snowboard manufacturer wants to make the smoothest boards ever, she believes that can be achieved by reducing friction as much as possible. Describe 3 things that could be change on a board so that friction between it and the ice gets smaller.

110. Science

In a tennis match the player hits the ball to serve the ball travels 24m from the servers raquet to the opponents Raquet at an average speed of 40 meters per second.calculate the time taken

1. Which of these numbers can be classified as both real and rational? A. 1/2 *** B. -1.016879413894 C. √5 D. 0.89089908999 2.Which is both a real number and an integer? A. √7 B. 0.15 C. -15 *** D. 1/3 3. What is an example of an irrational number? A.

141. Physics

An object consists of 5 masses, each of mass m, connected by massless rods. The two short rods have length L and the two long rods have length 2L. What is the moment of inertia about an axis perpendicular to the diagram (out of the page) and through the

142. chem

The noble has configuration for Ta is [Xe] 6s2 4f14 5d3 does the order in which i arrange the principle energy levels matter when i write the configuration? Like should it be [Xe] 5d3 6s2 4f14

143. Social Studies

1. At what point during the Revolution and Napoleonic period (between 1789 and 1815) do you think France became a nation? 2. What was the main event of the Revolution or Napoleonic period that you think made the people of France feel like they were a

144. math

He lays the long edge of the paper along the long edge of the frame several times and finds the frame is 4 papers long. How long is this in inches

145. Physics

A pair of objects with masses 3m and m are connected by a hook and have a massless compressed spring between them. Initially the objects are at rest. Then the hook unlatches, the spring expands to its released length and the larger mass is then found

146. Math

Input 10 output 55

147. Problem solving

Place a counter over the children. Draw the counter. Dont not what im suppose to do though.

148. math

a recipe calls for 2 3/4 cups of milk and i want to make it 1 1/2 times smaller. How much milk do I need?

149. Physics

an astronaut throws a ball with mass m to the right with speed v. It strikes the wall of the space station and rebounds, moving left with a speed V/2. What was te magnitude of the impulse of the ball caused by the collision? Any help would be greatly

150. Science

Question 1- how does a multicellular organism develop? A- the cells differentiate. B- The cells shrink. C- One cell grows bigger. D- The cells replicate to form exact copies.

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151. Physics

In DESPERATE NEED OF HELP!!! An object of mass m = 10 kg and speed v = 2 m/s collides head on with a second object of mass m = 5 kg which has a speed v = 1 m/s. The objects stick together. There are no external forces on the two objects (note the given

152. Physics

An astronaut throws a ball with mass m to the right with speed v. It strikes the wall of the space station and rebounds, moving left with a speed V/2. What was the magnitude of the impulse of the ball caused by the collision?

153. Physics

a pendulum of length (L) = 1m swings through an angle 20 deg. What is the length (d) of the path traveled by the pendulum mass?

154. Chemistry (molarity)

What would the effect on your molarity of NaOH be if you had added 35 mL of water to dissolve the KHP (acid) instead of 25 mL? Explain. My answer so far is that adding more water shouldn't affect the molarity at all because water does not account for the

155. Math

The ratio of Orange socks to green socks in Terrys drawer was 4 to 5.which of the following combinations could not be the actual numbers of Orange to green socks in Terrys drawer?

156. Math

The solution of d+s>−3 is d>−7. What is the value of s?

157. Math

An airplane traveled 300 km northeast in 2 hours. Find the velocity of the plane.

158. Math

The possible values of xx are given by x+8â‰¤6. The greatest possible value of 7x is|___|.

159. Physics

A bar of length 2L can rotate about a frictionless axle at its center. The bar is initially at rest and is then acted on by the three forces shown. What is the magnitude of the net torque on the bar?

160. Physics

Consider two fly wheels labeled A and B both of which are spinning with the same angular velocity. Each flywheel consists of two small heavy spheres connected by very light rods to a light axis. Flywheel A has spheres of mass 2m, each a distance R from the

161. Physics

Use the Law of conservation of energy to predict the final speed of a bowling ball dropped from the top of a 25.0 m tall building just before hitting the ground. ignore air resistance.

162. Pyhsics

Find the x and y components of the following 35 Ms at 57q from the x-axis

163. Math

Justine has 162 red buttons, 98 blue buttons, and 284 buttons. She says she knows she has more than 500 buttons without adding. How can we explain that without adding?

164. Physics

The orbital period of the moon about the earth is approximately 27.3 days. given that the average earth-moon distance is 384,000 kilometers, predict the moon's speed using the expression for centripetal force and the gravitational force, setting them equal

165. Physics

A motor takes 5 s to go from 30 rad/s to 130 rad/s at constant angular acceleration. The total angle through which its shaft turns during this time is... A. 400 rad B. 320 rad C. 640 rad D. 800 rad E. 1600 rad F. None of the above

166. Physics

A typical candy bar contains 300 kilo-calories of energy. if all the energy released by eating the candy bar could be used to do work in lifting a 1000 kg car, how high could it be lifted?

167. social studies

What was the long-term effect of the Magna Carta?

168. Science-Cells

What are the main parts of a plant cell? Cell membrane , Nucleus , Vacuole, Mitochondrion? Did I miss anything ? thanks.

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169. Math

Suppose v varies directly as a g,and v=36 when g=4 find v when g=11

170. Science-Cells

I'm doing a lab report, and we are looking at an onion cell under a microscope. The teacher asks to explain why we put iodine on the sell. (ANSWER)= Cleaning it ?

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171. social studies

What was the long-term effect of the Magna Carta? a. A weakening of power of feudal lords. B. The surrender of French territory to English rule. C. The rise of strong trading cities . D. The development of more democratic government? WHAT'S THE ANSWER

172. Maths

Write. The following in standard. Form 6120

173. Math

How do you do cos Question cos 56 + 16 to the power of 2

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174. Math

Explain why you would make one of the addends a tens number when solving an addition problem

175. Geometry

Samantha is buying carpet for her family​ room, which is 8 yards by 13 yards. The carpeting is sold in square meters. How many square meters of carpeting will she​ need? ​ (Use 1 yd ≈ 0.9144​m.) I am pretty sure 8 and 13 need to be squared and

176. Math

Define the unit in word form 19*15 = 19(?)

177. math

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

use a grid and lengths of line segments to give a geometric argument

179. math

Triangle $ABC$ is a right triangle with right angle at $A$. Suppose $\overline{AX}$ is an altitude of the triangle, $\overline{AY}$ is an angle bisector of the triangle, and $\overline{AZ}$ is a median of the triangle, and $\angle XAY = 13^\circ$. If $X$

180. Chemistry

Explain how a ligand can be both sigma donating and pi donating and give an example of a ligand that does both. Is this ligand a Lewis acid or a Lewis base? Thank you!

181. Math

Plz help me find the cost $20 plus$1.50 per hour to rent a golf cart

182. math

In triangle $ABC$, $BC = 20 \sqrt{3}$ and $\angle C = 30^\circ$. Let the perpendicular bisector of $BC$ intersect $BC$ and $AC$ at $D$ and $E$, respectively. Find the length of $DE$.

183. Math

I don't understand stand this 20y+1.50x=?????

184. Math

Simplify (Log75+log9+log5)÷(log5+log45)

185. Math

Which two square roots are used to estimate √5? √1 and √2 √2 and √4 √4 and √9

186. Math

It costs $20 plus$1.50 per hour to rent a golf cart. Find an equation showing the relationship between the cost of renting a cart (y) and the number of hours it was rented (x)???? Plz I really don't understand this

187. Math

Find the sum of each series by using appropriate formulas. Show your work. MY WORK: (N is the last number in the sequence) 1+2+3+...+230 n(n+1)/(1*2) 4+8+12+...+360 n(n+4)/)4*2) 1+3+5+...+123 ((n+1)/2))^2 The problem: 53+59+65+...+233 n(n+6)/(6*2)

188. 8th Grade Social Studies Unit test

What is all the answers? please help 1. What significant affect did the Treaty of pairs, signed after the french and Indian War, have on France? a.France had to Withdraw to its empire in central and South America. b.France had to allow the British to claim

189. American Government

Which statement best explains the oversight function of congressional committees? It protects the president from overreach by the Senate and the House. It is one of the checks the legislative branch holds over the executive branch.

190. English

1. Tell me what you won. 2. Tell me what you won in the competition. 3. Tell me what you won in the race. 4. Tell me what you won in the English speech contest. ================== Are they all grammatical? Is 'what' an interrogative pronoun? Or is 'what' a

191. Nats

If oxygen, nitrogen and ozone did nor absorb UV radiation, what would you expect the temperature profile in the atmosphere to look like between the surface and top of the atmosphere? any help is appreciated thank you

192. Math

The school band is comprised of middle school students to the number of high school students was 1:8. However, this year the ratio of middle school students to high school students changed to 2:7. If there is 18 middle school students in the band , how

193. matha

The value of a machine depreciates every year by 5% if the present value of the machine be rupees 100000 what will be its value after 1year . ... Then the answer 9500000

194. Chemistry

What is the molarity of the final solution of 2.00mL of the 5.00M stock solution is diluted to 10.00mL to make solution A. Solution A undergoes a second dilution by taking 3.00mL solution A and diluting it to 25mL? I'm so confused by this. Please help.

195. math

2 1/8 divided by 3 1/4= a.68/104 b.221/32 c.17/26 d.6 29/32

196. English

1. Tell me where she lives.﻿ 2. He asked me how she should do. 3.﻿ He showed them how to open the bottle. 4. Do you know why he was late? 5. I don't remember when she arrived. 6. I wonder how he open the door. 7. I doubt why he didn't come here.﻿

197. Math

Next number in this sequence: -2, 0, 7, 22, 48?

198. Statistics

A card is drawn from a deck of 52 and recorded. Then the card is replaced and the deck is shiffeled. this process is repeated five times. What is the probability that all five times the car drawn is an ace

199. Math

A bag of wood chips weighs 12.4 lbs. how much does a bag containing 0.42 times as many wood chips weghs?

200. Chemistry (molarity)

How would I find the moles of NaOH solution that was used to titrate? I have 20.01mL of HCl used and 15.95mL of NaOH solution was used to titrate.

14cos+7=O

202. Calculus

I don't understand how to get q for this problem? The next steps for the problem, you just need to plug q in, but I'm not sure what to do? Do you set revenues equal to expenses? Problem: Revenue is given by R(q) = 750q and cost is given by C(q) = 6000 +