Homework Help

Science

For successive electron removed from an atom the ionization energy does what  ?

Posted by kierrab on May 20, 2013 at 4:00 PM via web. Be the first to answer.

Science

What is the base of stoichiomtry ?

Posted by andahypp on May 20, 2013 at 3:22 PM via web. 1 educator answer.

Chemistry

what is particular in formula of hydrates ?

Posted by gannahea on May 20, 2013 at 3:07 PM via web. 1 educator answer.

Science

constipation is a health  condition that is caused by lifestyle choice 1-identify one specific body system that...

Posted by ninaesl on May 20, 2013 at 1:13 PM via web. Be the first to answer.

Science

Explain how each piece of evidence you have identify shows that the universe is changing.

Posted by jasma82 on May 20, 2013 at 12:32 PM via web. 2 educator answers.

Science

White phosphorus consists of A a giant structure of atoms. B a giant structure of ions. C small molecules. D...

Posted by roshan-rox on May 20, 2013 at 10:51 AM via web. 1 educator answer.

Science

In an endothermic reaction in aqueous solution, which of the following is correct?   Temperature        ...

Posted by roshan-rox on May 20, 2013 at 10:50 AM via web. 1 educator answer.

Science

When 0.635 g of copper (relative atomic mass, RAM = 63.5) is added to an excess ofsilver nitrate solution, 2.158...

Posted by roshan-rox on May 20, 2013 at 10:47 AM via web. 1 educator answer.

Science

Nickel(II) sulfate is prepared by adding an excess of nickel(II) carbonate to 0.010 molof dilute sulfuric...

Posted by roshan-rox on May 20, 2013 at 10:44 AM via web. 1 educator answer.

Science

Four charges are arranged at the corners of square ABCD. ...

Posted by rocky.goyal on May 20, 2013 at 10:10 AM via web. 1 educator answer.

Science

In general, reactive metals tend to have low ionisation energies and less reactive metals have higher ionisation...

Posted by tamanim on May 20, 2013 at 9:00 AM via web. 1 educator answer.

Science

A 0.10 M solution of a weak acid HA turns red in phenol red and yellow in thymol blue. Determine the approximate...

Posted by seventhheaven on May 20, 2013 at 8:48 AM via web. 1 educator answer.

Science

How to construct an ionic equation for the reaction of magnesum and dilute acid.

Posted by tamanimat on May 20, 2013 at 8:48 AM via web. 1 educator answer.

Science

Explain where the carbon, hydrogen and oxygen molecules come from to make glucose(C6H12O6)

Posted by kazz711 on May 20, 2013 at 7:53 AM via web. 1 educator answer.

Science

What do we understand by Oxidation number of oxygen is 1/2 in superoxides?

Posted by spsaroj on May 20, 2013 at 7:19 AM via web. 1 educator answer.

Science

If the pH is 2.5 what is [H3O+] and [OH-] and if pOH is 4.6 what is [H3O+] and [OH-]    

Posted by mpumpkin on May 20, 2013 at 2:28 AM via web. 1 educator answer.

Science

What is the pH of a 0.00750 M H2SO4 solution?

Posted by bec-bec on May 20, 2013 at 1:56 AM via iOS. 1 educator answer.

Science

If I have HCN+H2O<-->H+ + CN and Molarity is  [.5] and Ka of 4.93x10 ^-10   what would [H+] m [OH-], pH,...

Posted by mpumpkin on May 20, 2013 at 12:23 AM via web. 1 educator answer.

Science

Write a letter to aThe Nursing Times describing the controversial decisions, with specific examples of when...

Posted by jasma82 on May 19, 2013 at 11:27 PM via web. Be the first to answer.

Astronomy

What is the most commonly accepted theory on how the universe was formed?

Posted by jasma82 on May 19, 2013 at 11:19 PM via web. 1 educator answer.

Science

41g of glass at 95 deg. C is put in 175g of H2O at 21 deg. C in an insulated container. What is the final temp....

Posted by jokojoko on May 19, 2013 at 10:44 PM via iOS. 1 educator answer.

Science

Explain why different molecules have different sequence of energy of molecular orbitals?

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Science

Explain how muscles cause movements in a hindge joint?  

Posted by cian1998 on May 19, 2013 at 5:46 PM via web. 1 educator answer.

Science

What does this mean and how do I do it? I have a test tomorrow and I don't understand this...  Give  the...

Posted by madikarrots on May 19, 2013 at 4:55 PM via web. 1 educator answer.

Science

What is the number of atoms in 5g Pb ?  

Posted by econominty on May 19, 2013 at 3:05 PM via web. 1 educator answer.

Science

Name and e xplain acid HBr O 3?

Posted by varka on May 19, 2013 at 2:19 PM via web. 1 educator answer.

Science

which organs are found in which regions of the human body?

Posted by atracy1 on May 19, 2013 at 2:18 PM via web. 1 educator answer.

Science

What is chemical formula for ionic compound with S r &Br .

Posted by jamnette on May 19, 2013 at 2:03 PM via web. 1 educator answer.

Science

Photoelectric effect . What happens to the kinetic energy of the electrons as the intensity of the incident...

Posted by rockstar195699 on May 19, 2013 at 9:46 AM via web. 1 educator answer.

Physics

An object is 2.3 cm tall, and 5.5 cm from a converging lens.  The image is upright and 9.0 cm tall.  What is...

Posted by lkehoe on May 19, 2013 at 5:52 AM via web. 1 educator answer.

Physics

Light enters a substance from air at 45.0 degrees to the normal.  It continues through the substance at 34.7...

Posted by lkehoe on May 19, 2013 at 5:47 AM via web. 1 educator answer.

Physics

An optic fiber is made of clear plastic with index of refraction of 1.50.  For what angles of incidence will...

Posted by lkehoe on May 19, 2013 at 5:45 AM via web. 1 educator answer.

Physics

Light is passing through a transparent material at an angle of 63 degrees.  The material has an index of...

Posted by lkehoe on May 19, 2013 at 5:43 AM via web. 1 educator answer.

Science

A car of mass 1400 kg is travelling at 25 m/sThe kinetic energy of the car is   A) 17.5 kJ   B) 35.0 kJ  ...

Posted by roshan-rox on May 19, 2013 at 5:28 AM via web. 1 educator answer.

Science

An object of weight 7 N is raised from a height of 2 m to a height of 8 m.The change in gravitational potential...

Posted by roshan-rox on May 19, 2013 at 5:27 AM via web. 1 educator answer.

Science

What is the difference between pitch and frequency?

Posted by maryam-ahmad on May 19, 2013 at 3:39 AM via iOS. 1 educator answer.

Science

What is the differences between calcination and roasting?

Posted by spsaroj on May 19, 2013 at 2:54 AM via web. 1 educator answer.

Science

Examples of animals with one, two, and three chambered hearts. Compare the efficiences of these with the human 4...

Posted by em444 on May 19, 2013 at 12:23 AM via web. 1 educator answer.

Science

Examples of animals with open circulation systems. Compare these system with the human closed system.

Posted by timid1995 on May 19, 2013 at 12:21 AM via web. 1 educator answer.

Science

Compare and contrast passive transport system (like cnidarian) with active transport systems such as the human...

Posted by law222 on May 19, 2013 at 12:17 AM via web. 1 educator answer.

Science

Explain the principle of diffusion and active transport in relation to human circulation?

Posted by mark222 on May 19, 2013 at 12:07 AM via web. Be the first to answer.

Science

H2CO3, write the expression for Ka for the acid. Assume only one hydrogen is ionized.  

Posted by bubblelots101 on May 18, 2013 at 10:11 PM via web. 1 educator answer.

Crime Scene Investigation

What are the four general expectations that may distort perception?

Posted by kc76384 on May 18, 2013 at 9:32 PM via web. 1 educator answer.

Science

You are a nurse screeing a patient who has been complaining of heartburn. heartburn is a burning sensation in...

Posted by ninaesl on May 18, 2013 at 8:29 PM via web. 1 educator answer.

Asthenosphere

I think you made a mistake about the depth of asthenosphere as reported here (6050 mi it's too much). The whole...

Posted by user7132327 on May 18, 2013 at 2:59 PM via web. 1 educator answer.

Language

Do we need to understand the nature of Second Language (L2) writing in order to teach either the L2 writing or...

Posted by hjyhjy on May 18, 2013 at 2:05 PM via web. 1 educator answer.

Science

Electromagnetic waves have a wave and partical nature.This is known as wave duality. 1) Describe the situation...

Posted by rockstar195699 on May 18, 2013 at 5:33 AM via web. 1 educator answer.

Chemistry

Given a saturated solution of sodium acetate, outline the procedure you could use to determine the SOLUBILITY of...

Posted by quinnellow on May 18, 2013 at 2:14 AM via web. 1 educator answer.

Science

Explain the temperature and energy changes that take place during the exothermic and endothermic reactions.  

Posted by jasma82 on May 17, 2013 at 9:21 PM via web. 2 educator answers.

Astronomy

What evidence exists that the universe is changing?

Posted by jasma82 on May 17, 2013 at 8:48 PM via web. 1 educator answer.