Science & Mathematics - 27 July 2007

linear equation

2007-07-27 05:33:36 · 10 answers · asked by Jose T 1 in Other - Science

Question 1:
Acid solutions have a _______ taste.


Question 2:
Acid solutions cause reddish-purple phenolphthalein to become _________.


Question 3:
To produce a given acid, react sulfuric acid with the _____ of the acid desired.


Question 4:
Sulfuric acid is used to prepare other acids because it is stable and has a _____ boiling point.


Question 5:
An oxide which dissolves in water to form an acid or base is called a(n) ____________.


Question 6:
A base is also known as a proton __________.


Question 7:
A base consists of a metallic element or radical combined with one or more _________ radical.


Question 8:
Basic solutions have a _______ taste and a soapy feeling.


Question 9:
A base may be produced by reacting a salt of the desired base with ________.(Write out the compound name.)


Question 10:
A substance which shows the presence of an acid or base by changing color is called a(n) _____________.

2007-07-27 05:32:41 · 5 answers · asked by alex h 3 in Chemistry

2007-07-27 05:32:29 · 1 answers · asked by susanlim s 1 in Physics

Find an algebraic expression for the following problem. The area of a rectangle with a length of y meters and a width of 2 meters.

2007-07-27 05:29:41 · 6 answers · asked by whatever 1 in Mathematics

It would seem to me that this is a critical value when we discuss carbon footprints, etc.

2007-07-27 05:28:46 · 6 answers · asked by Anonymous in Agriculture

12c/15d

This simplifies to 4c/5d, right? Even though c and d are not necessarily the same value? I just can't remember.

2007-07-27 05:20:37 · 7 answers · asked by kae 4 in Mathematics

In the world's oceans, the average NaCl concentration is about 0.51 M. How many grams of NaCl would be in 1.0 liter of sea water?

2007-07-27 05:19:03 · 5 answers · asked by cbrice9 1 in Chemistry

Earths orbit in2012, and has the mayan calender been totally accurate with all the prediction said to have been made???? its scary.

2007-07-27 05:17:22 · 11 answers · asked by Anonymous in Astronomy & Space

Incomplete combustion of carbon-containing materials producing some carbon monoxide occurs when _____?

A. There are sulfur impurities in the carbon-containing material
B. There is excess of oxygen
C. The carbon-containing material is a gas
D. Insufficient oxygen to convert all of the carbon to carbon dioxide
E. The combustion flame is too hot

2007-07-27 05:16:24 · 7 answers · asked by cbrice9 1 in Chemistry

If a sample of water has a pH of 5.2 due to dissolved carbon dioxide forming the weak acid, H2CO3, with a Ka1= 4.3 * 10^-7, what is the concentration in M. of H2CO3 at equilibrium?

2007-07-27 05:14:19 · 2 answers · asked by cbrice9 1 in Chemistry

a. sympathetic nerves
b. spinal nerves
c. cranial nerves
d. nerves that innervate the adrenal medulla
e. splanchnic nerves

2007-07-27 05:13:33 · 1 answers · asked by Futbol 2 in Chemistry

One statement of Boyle's Law is that the pressure of a gas varies inversely as the volume for constant temperature. If a certain gas occupies 650cm^3 when the pressure is 230 kPa and the volume is increasing at the rate of 20.0 cm^3/min., how fast is the pressure changing when the volume is 810 cm^3?

2007-07-27 05:11:40 · 2 answers · asked by Anonymous in Mathematics

a. interact with the mechanoreceptors of olfactory hair membrane
b. enter nose slowly
c. be one of 7 primary classes of odors
d. be dissolved in fluid covering the olfactory epithelium
e. be present in high concentrations

2007-07-27 05:11:15 · 1 answers · asked by Futbol 2 in Chemistry

How deep is the deepest sea anyways?

2007-07-27 05:11:12 · 10 answers · asked by Ady P 1 in Earth Sciences & Geology

2007-07-27 05:06:02 · 23 answers · asked by Anonymous in Astronomy & Space

I have 4 what I Was told by the man who planted them before we bought this house were, Bradford Pear trees in my Garden. last year they had fruit about the size of a large egg. This year the fruit are bigger, and when I brought some into the house they ripened into what I think are Bartlet OR bosc I tasted one and it was delicious. Could they STILL be Bradford Pears?

2007-07-27 05:04:44 · 5 answers · asked by Anonymous in Botany

A. Child's tickets= $4, adult's ticket= $8

B. Child's tickets= $2, adult's ticket= $4

C. Child's tickets= $5.60, adult's ticket= $11.20

D. Child's tickets= $7, adults ticket= $14

please need ur help plzzz help me!!

2007-07-27 05:04:22 · 6 answers · asked by Anonymous in Mathematics

Solve the equation for y. - 2x - y + 9 = 0

A. y = 2x + 9
B. y = 2x - 9
C. y = -9x + 2
D. y = 9 - 2x

2007-07-27 04:57:52 · 9 answers · asked by whatever 1 in Mathematics

what are the steps to calculate this?

35/125? i know the answer comes out to 28%

2007-07-27 04:54:35 · 5 answers · asked by angrybull2000 2 in Mathematics

The reason for the question - seeing that earth was a supercontinent (Pangea) What is now known as South Africa or in that case Cape town and Table Mountain it must have been connected / joined to a different country somewhere in South America. If Table Mountain is not really a Mountain - but was formed because of erosion there should be a similar piece of land somewhere else, shouldn't there? Or then when did this erosion take place to form "Table Mountain"

2007-07-27 04:51:41 · 4 answers · asked by Ashley Engelbrecht 1 in Earth Sciences & Geology

Why is it that raspberries are made up of several fruit masses with one seed per mass, while strawberries are made up of one solid fruit mass with seeds lining the outer part of the fruit? There must be a logical reason to why they have evolved this way. Do they need to distribute their seeds in a certain way, hence the different structure they have evolved? Or have they simply evolved completely seperately with no common host?

2007-07-27 04:50:09 · 4 answers · asked by Anonymous in Botany

2007-07-27 04:48:39 · 10 answers · asked by kittypetkitty5 1 in Astronomy & Space

pls. be short and accurate.

2007-07-27 04:35:17 · 6 answers · asked by Anonymous in Zoology

2007-07-27 04:32:48 · 11 answers · asked by chris g 1 in Physics

give me theacurate answer okey. thank you.

2007-07-27 04:32:40 · 10 answers · asked by Anonymous in Zoology

What is the arc length with y greater than or equal to 0 from x=2 and x=3?

2007-07-27 04:32:35 · 2 answers · asked by Christy R 1 in Mathematics

how do the surive the winter,

2007-07-27 04:30:39 · 5 answers · asked by ron h 3 in Weather

2007-07-27 04:27:24 · 2 answers · asked by Shaun L 1 in Engineering

what might be the factors that affect the moon size. Personally I do believe that it does look somewhat bigger in Canada, don't know why. If you know, please give a link or source.

2007-07-27 04:26:09 · 5 answers · asked by WELL R.S. 1 in Astronomy & Space

2007-07-27 04:25:58 · 5 answers · asked by Sam 2 in Mathematics