chemdummy

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

Questions

The following questions were asked by visitors named chemdummy.

When two solutions are mixed and a new color is observed, is this color change an indication that a chemical reaction has occurred? Explain. It is not possible to directly observe chemical bonds breaking and forming during a reaction, molecules and atoms...

colorless vinegar added to purple cabbage juice turns pink What is the reason behind and why is it considered a chemical change?

C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. H-C-C-C-C- O-H ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this structu...

what is the 1. chemical equation 2. complete ionic equation 3. net ionic equation include phase of HCH3COO+NaHCO3 pls correct my answers 1. CH3COOH(aq)+NaHCO3(aq)+CH3COONa(aq)+H2O(l)+CO2(g) 2. CH3COOH(aq)+OH-(aq)=CH3COO-(aq)+H2O(l) 3. OH(aq)+CO2(g)

complete and balance Co(OH)3(aq)+Na2CO3(aq)

What is the mass of 4.80 moles of MgCl2?My answer is: Mg=24.3 g/mole Cl2=35.5g/mole*2=71g/mole so, Mg 24.3+ Cl2 71= 95.3g/mole therefore 4.80 moles * 95.3 g/mole=471.84g Am i right pls correct me if i'm wrong thanks

How many moles of water are there in 5 moles of Tungsten(V)oxalate tetrahydrate?

How many atoms are there in the following problems? which one has the most number of atoms? a. 5 molecuels (NH4)2S b. 9 molecules H2O2 c. 11 molecules O3

Why is ther no such thing as NaCl molecule? pllllsss neeed heeelp thank you

Is CaCl2 an ionic compound or molecule? plss help. i'm just a little bit confused.

You have a large amount of 7.50M stock solution. You need 1.80L of 3.00M solution for an experiment. How would you prepare the desired solution without wasting any stock solution?

how to prepare 300ml of .250M HCl from a 1.00 M HCl stock solution

On the average; glucose (C6H1206) makes up about 0.100% by weight of human blood. How much glucose is there in 1.00 kg of blood?

What relationship exists between H^+ ion concentration and OH^- ion concentration? Waht is the OH^- concentration of an aqueous solution with the H^+ concentration of 10^-4M. Calculate the pOH? Need help with this pls. thank you.

Answers

The following answers were posted by visitors named chemdummy.

thanks DrBob222 for the answer kindly teach me what does sum coefficient mean and how to get it based from this problem

sorry but it should be -50 degree C i typed it wrong