胡雪8°

What is the wavelength of radiation that has a frequency of 5.80×1014 s−1 ?

find x and y intercepts. f(x)=(x-3)^2 + 5.?

In the balanced redox reaction equation, which species is the oxidising agent and which is the reducing agent for the forward reaction?

2C2H4(g)+2O3(g)->4CH2O(g)+O2(g) given the data below what is the rate law reaction (in description, checking my answer)?

A compound contains arsenic and oxygen as its only elements. A 1.626 g sample of the compound contains 1.060 g of arsenic.?

Perform the operation and write the result in standard form. (i/3-2i)+(3+2i)/(3+8i). See picture also. ?

Maths Help?

Question number 8?

Find two positive numbers where the sum of the first and twice the second is 20 and the product is a maximum.?

Precalc: evaluate e^(ln (√11))? and log5(5^8)?

An automobile and a truck start from rest?

Titration Question?

How many moles of oxygen are in 3.0 moles of C6H12O6 ?

Calculate the mass in grams of 1.60 × 1024 molecules of ethylene glycol. The chemical formula for ethylene glycol is C2H6O2.?

transition metals are often paramagnetic owing to the presence of one or more _____ electrons in the system?

physics help please!?

Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O2(g)2PbO(s)...... ΔH° = -434.6 kJ (2) 2Hg(l) + O2(g)2Hg?

Help with homework?

Waves and the Quantization of Energy?

two products A and B. Each unit of A requires 3 labor hours and each unit of B requires 5 labor hours. Daily manufacturing capacity is?

How many milliliters of 0.150 M are required to react completely with 175 mL of 0.0855 M K2CrO4? What mass of Ag2CrO4 is formed? AgNO3?

Using ohms law, determine the current in a 120 volt simple series circuit if the resistance is 40 ohms.?

What is the effective nuclear charge of iron for 3d and 4s electron?

Boiling points of hydrides graph question. PLease explain answers for revision purposes?

2C8H18+25O2→16CO2+18H2O The question asks how much octane can react with 0.890 mol of oxygen?

E is the midpoint of DF=2x+4, and EF=3x-1. Find all segment lenghs?

Which function is a quadratic function? a p(x) = 2x(x2 + 6) + 1 b m(x) = –4(x + 3) – 2 c t(x) = –8x2(x2 – 6) + 1 d h(x) = 3x(x – 2) – 4?

Why is [log(x)]/[log(y)]=log_y(x)? How did this happen? Why did the denominator become the base of the numerator? Can you please explain?

Derivative of y = (x-1)^1/3 / (x+1)^1/3?

Challenging Chemistry Question?

Explain why a proton and a H+1 ion are equivalent. Are a Na+1 ion and a proton equivalen; explain your reasoning?

What is the compound name of AuP?

What is the correct answer choice ? And what do I need to understand in order to solve this problem ?

Calc help, find equation of y.?

44g of CO2 always contains avogadro number of molecules?

chem help please?

need help with chemistry problem?

oxygen-16 atom?

Mathematics GCSE Question - The Dog Chain Problem?

In mathematical induction, can we take n = 2 in the first step if n is not equal to 1?

If I have produced 1 mL of and ester and the density is 1.05 g/mL, what is the mass?

Order Acid strength and Explain how to order : N^3- NH^2- HSO4^- SO4^2-?

what is the principal difference between a strong and weak acid.?

Basic Enthalpy problem, need help ASAP!?

Rearrange these linear equations into the form shown in brackets A) y=3x+5 (ax+by=c) B) 8x-2y=14 (y=ax+b) Thanks?

Can someone help with this math problem?

A block of wood 3cm on each side has a mass of 27g. What is the density of the block? ( Hint: Don't forget to find the volume of the wood. )?

chemistry problem?

name this compound using IUPAC system?

Can someone please help me with this chemistry question?