Saturday
August 30, 2014

Posts by kr


Total # Posts: 30

chemistry
iron(III) hydroxide---FeH3 ammonium bromide----NH4Br copper(I) sulfate---Cu2SO4 tin(II) oxide-----Sn2O2
February 6, 2012

chemistry
Identify the monoatomic ion that has the following properties. a. 11 protons and 10 total electrons Na+ b. 9 protons and 8 valence electrons F- c. 47 protons and 46 total electrons Ag+ d. 28 protons and 26 total electrons Ni2+
February 6, 2012

chemistry
Give the name for each of the following: (a) SiF4----Silicon tetraflouride (b) CuBr2---Copper dibromide (c) MgCO3---Magnesium Carbonate (d) NH4NO3----Ammonium Nitrate
February 6, 2012

chemistry
give the total number of protons and electrons in each atom Cr2+ 24 protons 22 electrons Cr3+ 24 protons 21 electrons Ni3+ 28 protons 25 electrons Ni4+ 28 protons 24 electrons
February 6, 2012

chemistry
How many moles of nitrogen is 1.52 × 10 17 nitrogen atoms?
February 5, 2012

chemistry
we have to have the right number of sig figs so wouldnt 0.4 be the right answer in terms of sig figs
February 5, 2012

chemistry
A sample of magnesium weighs 10 grams. How many moles of magnesium are there in the sample? 0.4 moles?
February 5, 2012

chemistry
How many carbon(C) atoms are present in 30. mol of carbon? 1.8*10^25
February 5, 2012

chemistry
For each, give the total number of electrons, the number of valence electrons, and the number of the energy level that holds the valence electrons. Br-35 electrons--7 valence--4th level Kr-36 electrons--8 valence--4th level As-33 electrons--5 valence--4th level I-53 electrons...
February 5, 2012

chemistry
Using a periodic table, determine the number of electrons held in energy levels 1-3 of each atom. B----2 in level 1--3 in level 2--0 in level 3 C--2 in level 1--4 in level 2--0 in level 3 Mg--2 in level 1--8 in level 2--2 in level 3
February 5, 2012

chemistry
How many moles of iron is 67.9 g of Fe? 1.22 moles Fe? How many grams of iron is 6.57 × 10-2 mol Fe? 3.66 g Fe
February 5, 2012

chemistry
You are traveling in a country that uses the metric system. Your child is sick and a nurse determines her temperature to be 40.8 ºC. What is this temperature in ºF? (1.8*40.8)+32=105.44 105 (answer with correct # of sig figs)
February 1, 2012

chemistry
A patient has 0.050 L of blood drawn and this volume of blood has a mass of 55.0 g. What is the density of the blood? Use correct number of sig figs 1.1?
February 1, 2012

chemistry
1.3 ml
February 1, 2012

chemistry
An antibiotic is sold in 4.0 mL ampoules that contain 60.0 mg of drug (60.0 mg/ 4.0 mL). How many milliliters of the antibiotic should be withdrawn from the ampoule if 20 mg are to be administered to a patient?Use correct number of sig figs 0.75ml?
February 1, 2012

chemistry
Zenapax® is used as part of immunosuppressive therapy for transplant patients. The dosage is calculated on the basis of 1.0 mg/kg. What is the proper dose for a 175 lb patient? (Given: 1kg = 2.205 lbs) 175*2.205=385.875
February 1, 2012

chemistry
(2.60 x 10^3 x 0.897) + 2.69 (with correct # of sig figs) IS the answer 2334.89
January 31, 2012

chemistry
Ethanol has a density of 0.780 g/mL. What volume would 500. grams of ethanol occupy. Answer with correct number of sig figs
January 31, 2012

chemistry
Zenapax® is used as part of immunosuppressive therapy for transplant patients. The dosage is calculated on the basis of 1.0 mg/kg. What is the proper dose for a 175 lb patient? (Given: 1kg = 2.205 lbs)
January 31, 2012

chemistry
A kitten's normal body temperature is 102ºF. Express this temperature in ºC.
January 31, 2012

chemistry
You are traveling in a country that uses the metric system. Your child is sick and a nurse determines her temperature to be 40.8 ºC. What is this temperature in ºF?
January 31, 2012

chemistry
1100
January 31, 2012

Algebra
How do you find the roots to x^2-6x+3
May 24, 2010

math
You would divide first 20/2 and 24/3. You get 10-8 and that equals 2. 20/2= 10 24/3= 8 10-8= 2
May 24, 2010

Algebra
Which of the following expressions equals the sum of the binomial factors of 6q^3-5q^2+24q-20? A. 7q^3-1 B. 6q^3-1 c. q^2+6q-1 D. q^2+6q+1
March 9, 2010

Algebra
solve for x: -3(x^2+2)=102
March 7, 2010

Algebra
Solve using substitution Y= x^2-2x-6 and y= 4x+10
February 7, 2010

algebra
Find algebraically the equation of the axis of symmetry and the coordinates of the vertex of the parabola whose equation is y= -2x-8x+3
February 1, 2010

government
Whose responsibility is it to determine if governmental acts are constitutional?
April 13, 2009

ethnics
What other measurements do sociologist use to measure prejudice besides the IAT? How many are there?
February 20, 2009

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