chemistry! URGENT

60,378 results, page 65

chemistry

How much work is done when a 175g tomato is lifted 14.7m?

chemistry

how does one find out the moles of NaCl?

Chemistry

what does the Lewis Dot Structure of Sr(CN)2 look like?

Chemistry

In an aqueous solution the [OH–] is 2.0 x 10–6 M. What is the [H3O+]? Question 17 options: 1.0 x 10–7 M 2.0 x 10–6 M 1.0 x 10–8 M 5.0 x 10–9M

AP chemistry

How do you balance ZnCO3 +O2 yields ZnO + CO2?

chemistry

Find the percentage of water in Na2CO3*2H2O?

chemistry

3 moles C6H12O6 in 100 ml equals what molarity?

chemistry

calculate the molarity of a g NaCl in 250 ml solution.

chemistry

3moles KI in 500 g of H2O equals what molality?

chemistry

how many moles of BaCl2 are in 300 g of H2O if the molality is 0.2 m?

Chemistry

Calculate Delta H for the following equation: Zn(s) + 2H+(aq) = Zn2+(aq) + H2(g)

Chemistry

Chemistrywhat is the weight of 1 atom of H in gram (at.wt Of h = 1.008) ?

Chemistry

Show how to calculate the molarity of 45 g of hcl in 1.5 L of water

chemistry

How many bonds can each atom make without hybridization? B,N, and O

chemistry

How many grams of CO(g) are in 0.944 L of the gas at 2.26 atm and 257. K?

chemistry

What is the mass of 4.3 × 10 to the power of15 atoms of nickel (Ni)?

Chemistry

How many molecules are in 0.923 mol of selenium tetrabromide?

chemistry

how many moles of solute are contained in 18.5ml 2.5m CaCL2

chemistry

is finding the molality and molarity the same concept

chemistry(solutions)

What is the % w/v of 13.2 g of salt dissolved in 264 mL of solvent?

chemistry

Can someone show me how to make a smoke bomb?

Chemistry

The density of 18% HCl is 1.09g/ml. Calculate its molarity (M).

chemistry

When 40.2g of kc103 is heated what quantity of kc1 is produced

Chemistry

What is the percent by mass of hydrogen in aspirin C2H8O4?

Chemistry

What is the mass of 1.00 mol of sodium hydrogen carbonate?

Chemistry

find the mass in grams of 1.40x10^23 molecules of n2

chemistry

how many HCl needed to dissolve 1 grams of Al2O3.

chemistry Drbobz222

How do i convert mols CaCl2 to AgCl

chemistry

How to prepare 0.2M of NaOH in 250ml volumetric flask???

Chemistry

Why is the carbonate solution boiled before titrating?

chemistry

How do gas particles exert pressure on their container?

Chemistry

I would i calculate the E.F of nitrogen 21% hydrogen 7.48% chlorine 66.35%

chemistry

Give the shapes of CH3, O3, SnCl3, BrF3, I3

chemistry

how many moles are present in 2.45 x 10²³ molecules CH₄?

chemistry

at STP , what is the volume of 7.08 mole of Nitrogen gas ?

chemistry

Balance redox reaction. Fe(s) + O2(g) + H2O(l)-->Fe2+(aq) +OH-

chemistry

how do I write the rate of the reaction for the following: Cl(g)+O3(g)-> ClO(g)+O2(g)

chemistry

How can Coulomb's law explain the distribution of electrons.

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

Why does the carotene elute from the column before the chlorophylls?

Chemistry

What is the percent by mass of NaHCO3 and KCl in the mixture.

chemistry

Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.

Chemistry

What is the name of the substance with formula Cu(H2O)6SO4?

Chemistry

How do I get the answer to ?mass, 200 cm3volume, 6.843 g/ml=

Quick chemistry help

What is the precipitate color for Na3PO4+CaCl2?

chemistry

chemical formulae for naphthalene and benzoic acid

chemistry

why does HF have a boiling point of 19°c and H2O 100°c

Chemistry

calculate the density of 50.0 g of gold that occupies a volume of 2.59 mL.

Chemistry

what is the PH of a solution of .1 M NAN3 that disassociates into HN3

chemistry

How many kilocalories are required to produce 1.83mol of aluminum?

chemistry 30

Calculate the enthalpy of reaction for the combustion of ethene.

Chemistry

how to prepare 100.0 ml of 0.2 M solution of sodium hydroxide

Chemistry

Are acids or bases suppose to react with carbonates?

chemistry

Calculate the hydroxide ion concentration of a solution with pH = 8.25.

Chemistry

What is the empirical formula for a compound that is 1.67g Ce and 4.54g I?

chemistry

is acid rain homogeneous or heterogeneous mixture?

chemistry

I would love help on trying to start this problem?

biology/ chemistry

how do electrolytes affect the formation of micelles?

chemistry

what is the strongest intermolecular force in nitrogen trifluoride

Chemistry

How many grams of CO(g) are there in 67.0mL of the gas at 0.826atm and 30 ∘C?

chemistry

Calculate the volume occupied by 3moles of a gas at r.t.p

Chemistry

What intermolecular forces are responsible for neoprene's stretchiness?

chemistry

the complete electrolysis of 90 grams of water will yield

chemistry

What is the heat involved when 3.00 g of aluminum oxide is formed?

chemistry

Why do you add Sodium hydroxidein your reduction procedure

Chemistry

What is a balanced equation for a Base-Acid Titration?

chemistry

How many grams of H2 are needed to produce 12.22g of NH3?

chemistry

How many molecules (not moles) of NH3 are produced from 3.55×10−4g of H2?

Chemistry

C18H32O2 + 2H2 - C18H3602; oxidized or reduced?

chemistry

what is ion pair formation in regards to extractions

Chemistry

What is the energy and frequency of a photon with a wavelength of 2.57 ×102 m?

chemistry

How to calculate the concetration on a Beer's law plot?

chemistry

q4 What element has the greatest first ionization energy? Li Na K Rb Cs

chemistry

What is the approximate effective nuclear charge for arsenic ?

Chemistry

In which condition(s) can I get this reaction: Fe + H2SO4 = Fe2(SO4)3 + H2

chemistry

how many ml of nitric acid will neutrilize 20 ml of KOH at .5 moles

chemistry

why does the neutrality in the blood depends on the concentrations of [H+] and [OH-] rather than pH.

Chemistry

How much heat is absorbed when 60.0h of ammonia is vaporized ?

chemistry

How many equivalents of an acid or base are in the following? 0.43mol Mg(OH)2 and 2.8g Mg(OH)2?

chemistry

find the numbers of elerctorins in 18ml water

Chemistry

Explain why a catalyst speeds up a chemical reaction.

Chemistry

Why may the absorbance of a filtrate be higher than it's theoretical concentration?

CHEMISTRY

ARRANGE THE FOLLOWING 0.1 M SOLUTIONS IN ORDER OF INCREASING PH

chemistry

What is the mass of 225ml of a liquid that has a density of 0.880g/ml

Chemistry

Calculate the frequency of an electron traveling at 1.85X10^7 m/s.

chemistry

What is the dominant intermolecular force for propionic acid?

Chemistry

Does aluminum dissolve in acidic and basic solutions?

chemistry

how is silver separated from its soluble salt solution?

Chemistry

How many grams of rust are produced from the oxidation of 10.0 lb of iron?

Chemistry

Round to the correct number of significant figures. 1) 6.02/2.23 2.70 2) 18.42/2.34 7.87 3) 35.15/3.10 11.3

Chemistry

How would you know if AgNO3 + Al(NO3)2 forms a precipitate?

chemistry

What is the molecular weight and formula for petroleum ether?

organic chemistry

how many atoms are there in 42.2g of sulfur divided by 1.0x10 to 23

Chemistry

How many hydrogen atoms are in a 15.00 mg sample of glucose? (C6H1206)

chemistry

Write the differences between atom and molecules?

chemistry

Which ions are formed during electrolysis of water?

Chemistry

A solution of NH3 in water has a pH of 11.17. Calculate it's molarity

Chemistry

Explain the role of CH3CO2Na n the preparation of Fe(C5H7O2)3)3

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