# Posts by Janessa

Total # Posts: 16

chemistry
when 1.00kg of copper reacts, 3.12kg of silver is recovered. what is the percentage yield?

science
How many moles of carbon monoxide are needed to react completely with 108 kg of Fe2O3. Fe2O3(s)+CO(g)?Fe(s)+CO2(g)

Geometry
A flagpole is 45 feet away from the school building. A 6-foot tall student stands 15 feet away from the building. What is the height of the flagpole?

Math

Pre-Algebra

Pre-Algebra
1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode and the median of the ...

Pre-Algebra
YES SO THE ANSWER IS 30

Pre-Algebra
Find the mean of the following data set: 25, 30, 20, 20, 25, 35, 35, 10 a. 15 b. 20 c. 25 d. 30 My Answer: b. 20

Spanish
Que te gusta hacer? Means What do you like to do? And the right answer would be D. Me gusta montar en mobopatin. (Means I like to skateboard)

Social Studies
Sorry It would never happen sorry :( !!!!!!

Social Studies
I post a question and nobody is answering! :(

Social Studies

Chemistry
By titration it is found that 69.9 mL of 0.151 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.

math
Harold says" to find 6x8 , i can use the facts for 5x4and 1x4." do you agree? explain.

Math
Hi! I am just starting algebra in my class, and I do not get it. If s=10, then 5s=?