Saturday

July 26, 2014

July 26, 2014

Total # Posts: 33

**Chemistry **

calculate the amount of heat required to decompose 8 mol of NaHCO3(s) 2NaHCO3(s) + 94000 J = Na2CO3(s)+ H2O(g) + CO2(g)

**math**

12

**chemistry**

In my organic lab, we synthesized synthetic banana oil. I'm asked what gas escaped during the sodium bicarbonate washing and to write two reactions that took place during that operation. I know carbon dioxide escaped but I don't know how to write out the formulas.

**life orientation**

5 ways in whuch environmental or human factors affect the environment

**math**

On an air track, a 403.0 glider moving to the right at 1.70 collides elastically with a 500.5 glider moving in the opposite direction at 3.00 . 1. Find the velocity of first glider after the collision. 2. Find the velocity of second glider after the collision.

**Physics**

On an air track, a 403.0 glider moving to the right at 1.70 collides elastically with a 500.5 glider moving in the opposite direction at 3.00 . 1. Find the velocity of first glider after the collision. 2. Find the velocity of second glider after the collision.

**math**

The temperature was 30 colder at midnight than it was at noon. If it was 15 C at midnight, what was the temperature at noon?

**Economics**

Here goes... 1. Consider a model in which an individual lives two periods: this period (time one) and next period (time two). This period his budget constraint requires that his consumption, c1; plus his saving, s; equals his income, y1: c1 + s = y1: Next period his budget con...

**math **

Pre Algebra Questions Sketch a model and obtain the sum. 3 + (-7)

**Calculus**

These are the two problems from my homework I don't get.. can you help me? A: y=2x-x^3 [0,1] use the limit process to find the area of the region between the graph of the function and the x-axis over the given interval. Sketch the region B: f(x)=4-(12/(x^2))Calculate the l...

**physics 12**

a 1kg satellite has an orbital period of 4 hours. what's the altitude?

**physics 12**

A satellite has an orbital period of 4 hours. what is the altitude? thanks.

**Science**

How to create an organism, using CYCLO, Ocular and PLAST

**Math**

During a 220 meter relay race, Jack begins at the starting line and runs for 4 minutes and then passes the baton to Jill. She runs for 3 minutes and finishes the race. If Jack can run 20 meters per minute faster than Jill, then what is Jack's rate of speed?

**Grammar**

My aunt works at Woods Hole as a scientist. What are the nouns in the sentence? Is is aunt, Woods hole and scientist?

**grammar**

What is simple predicate? Its legs make it one of the world's fastest insects. Would it be make?

**grammar**

Simple predicate? The history of these pests may surprise you. Would it be may?

**Grammar**

What is simple predicate? These insects are strange and amazing creatures. Would it be are?

**grammar**

What would be the simple predicate? The insects' bodies can turn wood into food. I think it would be turn.

**Physical Science-Sould you please check my explana**

Scientists have tried to define precisely the _____ since the metric system was introduced

**physics**

A ball is thrown vertically upward with a speed of 27.6 m/s. How high does it rise? Answer in units of m.

**8th grade**

2/5 divided by 5/6

**chemistry**

Rolaids consumes 47 times its weight in excess stomach acid. Can this be tested using quantitative measurements?

**ap chemistry**

A star is estimated to have a mass of 2 X 10^36 kg. Assuming it to be a sphere of average radius 7.o X 10^5 km. Calculate the average density of the star in units of grams per cubic centimeter

**Algebra**

Mack is 3 times as old as Justin. In 3 years, Mack's age will be 5 more years more than 2 times as old as Justin. How old are Mack and Justin? What is the system of equation for this? I got 3x=7 and x=5+2y. But it's wrong because, I ended up with negatives. Help! Thx.

**Com 220**

Hi, I am writing a sentence outline on the subject of World War II; more precisely, the events that led to the war. I am somewhat confused on how to do this on the parts that I need to state and support the argument as well as prepare against any rebuttals or objections. I do...

**biology**

can you explain the differences and similarities between the energy cycles of human cells, plant cells, and yeast cells?

**science (plz check my answers)**

Why do scientists keep revising the definition of the meter?

**physical fitness**

the ability of muscles to work over time is called what? the comparison of the weight of your fat to the weight of your muscles, bones, and joints is called?

**algebra**

without graphing classify each system as independent, dependent, or inconsistent. -2x-y=9 3x-4y=-8

**math**

how to add and subtract fractions

**analogies**

consternation;fear

**analogies**

skill is to prowess consternation;fear orbit;planet fire;smoke journey;destination

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