gabriella

This page lists questions and answers that were posted by visitors named gabriella.

Questions

The following questions were asked by visitors named gabriella.

what the characteristics of all living things but explaining? GBRHT UKE5SHYKU3I7LNXKUGH Your question is unclear. However, I searched Google under the key words "<I>life characteristics</I>" to get these possible sources: http://project.bio.iastate.edu/Ar...
19 years ago
hey i have a few questions i have no idea how to do them and the test is tuesday if price index in 2002is 120 and price index in 2003 is 110, then the rate of inflation is what? if GDP goes up what will happen?
17 years ago
if price index in 2002is 120 and price index in 2003 is 110, then the rate of inflation is what? if GDP goes up what will happen?
17 years ago
hi im doing a debate tomorrow on global warming, i am arguing that it DOES exsit. the opposing side who don't believe in global warming want to say that increases in temperatures don't cause sea levels to rise, instead the tectonic plates of the earth cau...
17 years ago
how wood i balance itt?? NH3 + O2 -> H2O + NO
16 years ago
What is the volume of ammonia needed when reacting 5.0 moles of oxygen with excess nitrogen?
16 years ago
the place of vienna, austria is characterized by what physical and cultural features?
16 years ago
Mrs. Rossi wrote the following clus for a mystery 4-digit number. .The tens digit is twice the one digit .The hundreds digit is twice the ones digit. .The ones digit is 3. .The sum of the digits is 19. What is the mystery number? show the work.
14 years ago
a banquet hall area is in d shape of a rectangle 30m by 20m.part of d area is a concrete square 15m by 15m,the rest is covered with carpet.calculate the area of the carpet.
12 years ago
define foreign trade
12 years ago
what are technical names
12 years ago
quelle heure est il?what is the time? 6:35,12:15,22:50,16:30,23:55 PLS HEEEEEEEEEEEEEEEEEELP
12 years ago
STATE 4 facts and fallacies abt the effect of sports participation on women reproduction
12 years ago
what does national unity preach. mention 5 institutions that promote national unity.
12 years ago
define constitution and explain federal constitution,unitary constitution,confederal constitution
12 years ago
Calculate the energy required to heat 827 g of mercury from 37 ◦C to 42 ◦C. The specific heat capacity of Hg(§¤) is 0.138 J/g ¡¤◦ C. Answer in units of calories
11 years ago
Consider the specific heats H2O(s) =2.09 J/g ¡¤◦C,H2O (§¤) = 4.18 J/g ¡¤◦C, and H2O(g) = 2.03 J/g ¡¤◦C. The heat of fusion for water is 334 J/g and its heat of vaporization is 2260 J/g. Calculate the amount of heat required to convert 92 g of ice at −13◦C...
11 years ago
Consider the specific heats CH2O(s) = 2.09 J/g ¡¤◦ C. CH2O(§¤) =4.18 J/g ¡¤◦ C. CH2O(g) = 2.03 J/g ¡¤◦ C. The heat of fusion for water is 334 J/g and the heat of vaporization for water is 2260 J/g. Calculate the amount of heat absorbed when 86 g of steam...
11 years ago
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more complicated, but this is a reasonable first approximation.) The combustion of carbon is described by the equation C(s) + O2(g) −! CO2(g) H◦ = −394 kJ What is the value of q...
11 years ago
Under certain conditions, the reaction 3A + 2B -> 4C was observed to proceed at a rate of 0.00348 M· s−1. What was the corresponding rate of change in reactant A?
11 years ago
A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.23 moles of KOH into 680 mL of solution. What is the pH of this buffer? Ka = 2.4×10−6 for HA.
11 years ago
The ionization constant of HA is 1×10−6. What must be the ratio of [A−] to [HA] for the preparation of a buffer solution with a pH of 5.74?
11 years ago
What is the concentration of H+ ions in a buffer solution containing 0.305 M benzoic acid (with ionization constant 6.5 × 10−5)and 0.834 M sodium benzoate (a salt of benzoic acid)?
11 years ago
What is the concentration of hydrogen ions in a solution containing 0.785 M HOCN (cyanic acid) and 0.659 M (NaOCN) (sodium cyanate)? The ionization constant of cyanic acid is 3.5 × 10−4. Answer in units of M
11 years ago
What mass of solid sodium formate (of MW 68.01)must be added to 125 mL of 0.48 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 4.07? Ka = 0.00018 for HCOOH. Answer in units of g
11 years ago
The ionization constant of HF is 7.2 × 10−4. What is the molar concentration of H+ in a solution which is 0.353 molar in HF and 0.145 molar in KF?
11 years ago
How many moles of sodium acetate (NaCH3COO) must be added to 1.000 liter of a 0.500M solution of acetic acid (CH3COOH) to produce a pH of 5.027? The ionization constant of acetic acid is 1.8 × 10−5. Answer in units of mol
11 years ago
Calculate the ratio of [NH3]/[NH4+] that gives a solution of pH = 10.60.
11 years ago
Calculate the pH at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (C2H5NH2) with 0.1000 M HCl solution. The volume of the solution at the equivalence point is 250.0 mL. Kb for ethylamine is 4.7 × 10−4.
11 years ago
What is the pH at the point during a titration when 34 mL of 0.200 M HCl has been added to 29 mL of 0.0500 M NH3 solution? HCl is a strong acid, Kb=1.8×10−5 for NH3. Answer in units of pH
11 years ago
What is the ratio of the molarities of PO3^4- and HPO4^2− ions in a buffer solution having a pH of 13.16? What mass of K3PO4 must be added to 1 L of 0.1 M K2HPO4(aq) to prepare a buffer solution with a pH of 13.16? Answer in units of g What mass of K2HPO4...
11 years ago
What are the major differences between the circulatory system and the respiratory system?
8 years ago
>Find m∠BAC and m∠DAB in the figure shown below.Line upper D upper C is shown intersecting with line upper E upper B at point upper A. The angle upper E upper A upper D is labeled 80 degrees." width="169" height="70" align="middle" style="border: 0px soli...
6 years ago
a stone is thrown vertically upwards with an initial velocity of 14m/s .neglecting air resistence , find time taken before it reaches the ground .
6 years ago
What conclusion could be drawn about the relationship between the two reactions? i know its a weird question but its on my assignment and have no idea how to answer plz help lol
4 years ago

Answers

The following answers were posted by visitors named gabriella.