# Chemisty

385 results

**Chemisty 11**

Why is it important to use the correct salt-sand mix on highways during storms? Help please this is for my Chemisty Project

**chemisty**

Na+I_2

**Chemisty**

explain how you get a decompositin..?

**chemisty**

balancing equations H2+02=

**Chemisty**

Need Boys #'s

**Chemisty**

why do you use water in calorimeters?

**chemisty**

how many grams are in 5.66 mole of of CaCo3

**chemisty**

(NH4)2SO4 How many atoms

**chemisty**

what is the name of this substance K2Cro4

**Chemisty**

How many V atoms are there in a 26.3 gram sample of V?

**Chemisty**

Full analysis for calcium

**chemisty**

calculate the H+ for green tea with a pH of 7.9

**Chemisty**

How do i convert 0.0024 to scientific notation

**chemisty**

does NF3 follow the octet rule

**Chemisty**

What is the electron dot structure of Ethanol?

**clinical chemisty**

why is lupus inhibitors important

**CHEMISTY**

why is but-1-ene a structural isomer of 2-methylpropene?

**chemisty**

give the conjugate base for HNO2

**Chemisty**

How do you convert 237.7 g/mol to moles?

**chemisty**

how do you convert 50 microliters of 2 butanol to moles?

**Chemisty**

If 59.0 mL of 0.40 M HI is mixed with 100. mL of 0.10 M KOH what is the resulting pH?

**chemisty**

How many moles of Ba(OH)2 are present in 295mL of 0.800M Ba(OH)2?

**chemisty**

convert 32.9g of neon into moles

**chemisty**

how many grams of KCL are there in 1200 ml of a 2% KCI solution

**Chemisty**

The molecular structure around the oxygen in water is....????

**Chemisty**

A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?

**Chemisty**

What mass of aluminum is produced by the decompisition of 7.47 kg of Al2O3?

**chemisty**

What is the approximate mass of 2L of C4H10 gas at STP?

**CHEMISTY**

WHICH HAS THE HIGHER BOILING POINT PENTANE OR HEPTANE

**Chemisty**

What volume of 0.57 M HCl is needed to react with 5.6 g CaCO3?

**Chemisty**

how many grams of propane would be burned with 80.0g of oxygen?

**Chemisty**

What mass of an NO2 is formed when and NO reacts with 384 g of O2?

**Chemisty **

How many grams of HNO3 will be contained in 300 mL of a 5 N solution?

**Chemisty**

What are the factors that cause the difference between measured pH and calculated pH in titration.

**chemisty**

How many moles of molecules are there in 250 grams of hydrogen nitrate?

**chemisty**

How much energy is needed to melt a 30.5 g ice cube?

**Chemisty**

In which cases are higher-energy photons released, with Li+ or Cu2+? How do you know?

**Chemisty**

calculate pH of 50.0 mL of a .100 M solution of the weak monoprotic acid HX

**Chemisty (Sig Figs)**

79.7 + 890.43 - 23 = 9.5 e2 its wrong and I am suppose to correct it.

**chemisty**

balance ___ch3ch2cooh + __o2 yields __co2 + ___h2o

**Science (Chemisty)**

Why do you never find liquid bromine in your neighborhood?

**Chemisty**

How would you classify a solution of NaCl at 35.9 g/100 g of water at 20° C?

**any tutor**

Are there any tutors on right now or people who are good with chemisty?

**Chemisty**

How many grams of c6h12o6 are needed to form 7.50g of c2h5oh

**Chemisty**

how many mole of calcium sulfate are in a 100mL of .86M solution?

**organic chemisty**

write raction of benzoic acid with propylamine

**Chemisty**

When alkali metals are heated with hydrogen they form--------hydrides

**Organic chemisty**

What's the difference between a major and minor product?

**Chemisty**

How many litres of water at 100°C are vaporized by the addition of 5.00 MJ of heat

**chemisty**

convert .98L of N20 gas at STP to moles

**chemisty**

how we prepare 0.5 mol of solution of hcl in 70ml in water

**chemisty**

What would happen if you reacted potassium dicarbonate with HCL and NaOH?

**Chemisty 11 U**

Determin the number of oxygen atmos in 1.75kg of potassium sulfate.

**Chemisty 11 U**

Determin the number of oxygen atmos in 1.75kg of potassium sulfate.

**Chemisty 11 U**

Determin the number of oxygen atmos in 1.75kg of potassium sulfate.

**chemisty**

What mass of iodine contains the same number of atoms at 25.0 g of chlorine?

**Chemisty**

Describe how you would prepare 250 ml of a 0.10M NaCl solution?

**chemisty**

how many grams of magnesium sulfate are required to make 575 ml of a 1.65% (m/v) solution

**Chemisty**

what instrument would you use to determine the mass of three apples

**Chemisty**

What instrument would you use to determine the volume of orange juice

**analytical chemisty**

Calculate the pH and pOH of a 0.00002M solution of acetic acid.

**chemisty 2**

Calculate the molarity (M) of a solution if you have 0.34 mol of NaOH in 19 ml of water

**Analytical chemisty**

How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?

**science**

when a substance is heated energy is released/ absored. in chemisty this is called an

**Chemisty**

250g of water containing sucrose freezes at -3.5C. What is the molality of the solution?

**chemisty**

what volume will be occupied by 3.25mol of oxygen gas at 735mmhg and 25celcius?

**Chemisty**

blanced equation for MgSO4(aq) + BaCl2(aq) describing any precipitaion reaction

**Chemisty**

the Keq of Mg(OH)2 is 2(10^-11). calculate the concentration of Mg ions in a saturated solution of this compound

**chemisty**

How many mL of .200 M NaOH are required to completely neutralize 5.00 mL of 0.100 M H2PO4?

**chemisty**

Calculate the density of oxygen,O2 , under each of the following conditions: 1- STP 2- 1.00 atm and 35.0 C

**chemisty**

what type of reaction occurs when potassium metal reacts with fluorine gas?

**chemisty**

how many grams of Na are needed to react with H2O to liberate 400mL of H2 gas at STP?

**chemisty**

calculate the molarity of a solution with .2 moles of sodim hydroxide dissolved in .5L of water

**Chemisty**

How many milliliters of 5.50 M HCl must be diluted to make 350. mL of a 0.500 M solution?

**chemisty**

What is the density of a 17.12 g object if the dimensions of the block are: length = 12.6 mm height = 9.82 cm width = 0.0140 m

**chemisty**

Calculate the volume of 4.0ml of nitogen gas at 754mmhg and 25 degrees celcius

**Chemisty**

What mass of carbon dioxide is formed by the complete combustion of 885g of methanol?

**Chemisty**

calculate the concentration of the solution of 6.4g calcium sulafte is added to 0.125l of water

**Chemisty**

Balance TeO3^3- + N2O4 --> Te +NO3^- using oxidation numbers Need help A.S.A.P

**chemisty**

If 26.5 mL of 0.222 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP?

**Chemisty**

8g of hydrogen is burnt in the presence of excess oxygen.the mass of water formed is?

**Chemisty**

What is the molecularity of each of the following elementary reactions? A. O+O2+N2----> O3+N2+ B. NO2Cl + Cl---> NO2 + Cl2 C. Cl + H2 ---> HCl + H D. CS2----> CS + S

**chemisty**

A bottle labeled 0.150Msulfuric acid contains a solution with what concentration in sulfate ions?

**Chemisty**

What is the Net Ionic Equation for the following: a.) NH4Br, NaOH b.) Li2CO3, HClO4 c.)Pb(NO3)2, Kl

**Chemisty**

In terms of saturation, how would you classify a KBr solution with a concentration of 78 g/100 g of water at 47°C?

**Chemisty**

In terms of saturation, how would you classify a KBr solution with a concentration of 78 g/100 g of water at 47°C?

**Chemisty**

How much KNO3 will you have to add to 100 g of water at 40° C to make a saturated solution?

**Chemisty**

How many moles of H2PO4 and HPO4 would be needed to prepare 1.0 L of a 0.01M phosphate buffer with a pH of 6.82?

**Chemisty**

Will Cd(OH)2 precipitate if 10.00 g of Cd(NO3)2(s) (MM = 236.42 g/mol) is added to 0.500 L of a 0.800 M NH3 solution?

**Chemisty**

2C2H6(g) + 7O2(g) = 4CO2(g) + 6H2O(g) How many L of oxygen gas is needed to produce 18.0 L of CO2

**Chemisty**

Write the symbols of the family of elements that have seven electrons in their outermost energy level.

**CHEMISTY**

WHAT IS THE MOLARITY OF A SOLUTION PREPARED BY DISSLOVING 4.92 GRAMS OF CALCIUM NITRATE, Ca(NO3)2 in 250 mL OF WATER?

**chemisty**

How many moles of carbon monoxide form at the same time that 0.337 mol CS2 forms?

**Chemisty**

Calculate the energy in radiation of wavelength 550 nm carried by 1) one photon 2) 1 mol of photons

**Chemisty**

Calculate the energy in radiation of wavelength 550 nm carried by 1) one photon 2) 1 mol of photons

**Chemisty**

Calculate the standard enthalpy change for the following reaction at 25 °C. MgCl2(s)+H2O(l)-->MgO(s)+2HCl

**Chemisty**

if 1.00 g of silver nitrate is combined with 1.00g of sodium chloride what is the mass of the solid if you have 75% yield?

**Chemisty**

At STP 4 liters of O2 contains the same total number of molecules as 1L of NH3 2L of Cl2 8L of He 4L of CO2

**Organic Chemisty**

How to identify the difference between major and minor products using Markovnikov' rule

**Chemisty**

how many moles of hydrogen will be liberated from 200.0ml of 3.00M HCL reacting with an excess of magnesium?