01/26/22

Calculate the minimum mass

Liquid hexane (CH3(CH2)4CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide(CO2) and gaseous water (H2O).Suppose 7.76 g of hexane is mixed with 45. g of oxygen. Calculate... more
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01/25/22

How do I go about doing this in a lab?
Solution preparation1. Prepare 20 mls of a 10% w/v solution of cobaltous chloride (pink colour, max. ABS @510nm)in a 30ml sample bottle.2. Using pipettes and sample bottles, make dilutions of the... more
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01/25/22

Find how many moles of gas
Assuming you collected 65.4mL of gas in the reaction with zinc, how many moles of gas would have been produced at 22°C and 103kPa?
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01/25/22

Vapor Pressure Help Needed!
The density of a 1.50 M solution of sodium nitrate (NaNO3) at 298 K is 1.021 g/mL. Calculate the vapor pressure of water above the solution. The vapor pressure of pure water at this temperature is... more
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01/25/22

What is the iodine clock reaction system and what is the propose of doing experiments?
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01/25/22

Copper reacts with sulfur to form copper (2) sulfide, there were 2.00 grams of copper, how many grams of cu2s can be formed?

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01/25/22

What is the specific heat, in J/g∘C , of the metal?
A metal is thought to be aluminum or copper. When 3.5  of the metal absorbs 12  , its temperature rises by 3.7 .
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01/24/22

9.70g of sodium sulphide. Na2S is added to 550 mL of 0.200 mol/L lead (II) nitrate solution, Pb(NO3)2. Calculate the maximum mass of precipitate that can form.
I need all the steps to find the answer, preferably with the G.R.A.S.S method please.My email is - [email protected]
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01/24/22

kinetics summary
In reaction A + B ---> P the following results were obtained for the initial rates of reaction for different initial concentrations. Deduce the rate equation and calculate the rate constant.... more
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01/24/22

kinetics summary
C composes to form D. The following results were obtained by experiment.[C] in mol L-1 1.00x10-3 2.00x10-3 6.00x10-3Rate in mol L-1 1.45x10-5 1.45x10-5 1.45x10-5 What is the rate equation... more
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01/24/22

kinetics summary
P and Q react to form E. In one experiment, the concentration of P is tripled while Q is kept constant. This causes the rate to triple. In a second experiment, the concentration of Q is doubled... more
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01/24/22

If electrons were discovered in 1897, how did Volta say the electricity was a flow of electrons in 1799??
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01/24/22

chemistry physical
The rate constant is 7.5 × 10-3 dm3mol–1s. Given that the initial number of moles ofA is 0.05 moles in a volume of 2 litres.Calculate the time (s) taken for [A] to be reduced by 20 %.
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01/23/22

In metric terms, a typical automobile averages 5.48 km/L of gasoline burned
In metric terms, a typical automobile averages 5.48 km/L of gasoline burned. Gasoline has a heat of combustion of 48 kJ/g and a density of 0.68 g/mL. How much energy is consumed in driving an... more
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01/23/22

A gold coin whose mass is 7.06 g is heated to 137.6°C...
A gold coin whose mass is 7.06 g is heated to 137.6oC and then quickly dropped into an ice calorimeter. What mass of ice melts? (The amount of heat in an ice calorimeter is determined from the... more
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01/22/22

what are your thoughts after reading the following articles?
Interesting articles about the way we have been learning and teaching science.if you are interested read one or both articles and let me know what you think!Silence is Never Neutral; Neither is... more
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01/22/22

3.42 g of sucrose is dissolved in 18g of water in a beaker. The number of oxygen atoms in the solution are
I am not able to do this Q, and if possible please answer this without using the formulas but in the arithmetic wayThank You!
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01/22/22

Consider the following electrolytic cell, C(s) ⎜CrBr3(aq),⎟ C(s) 
Determine the standard cell potential Include the half reactions, indicating the cathode and the anode Include the overall reaction
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01/22/22

Consider the following electrolytic cell, C(s)|NiI2(aq),|C(s)
a. Identify potential Oxidizing agents and Reduction agentsb. Determine the standard cell potentialc. Include the half reactions, indicating the cathode and the anoded. Include the overall reaction
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01/22/22

Using: N 2 + 3H 2  2NH 3 How many moles of NH 3 can you make from .41 moles of H 2
The first 2's are subscripts and so is the 3 in NH 3.
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01/21/22

Given that 6.9 moles of carbon monoxide gas are present in a container of volume 34.5 L, what is the pressure of the gas (in atm) if the temperature is 62°C
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01/21/22

The volume of a gas is 5.345 L, measured at 1.00 atm. What is the pressure of the gas in mmHg if the volume is changed to 9.65 L while the temperature remains constant?
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01/21/22

A gas occupying a volume of 725 mL at a pressure of 1.345 atm is allowed to expand at constant temperature until its pressure reaches 0.345 atm. What is its final volume?
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01/21/22

A 34.50 g piece of limestone is placed into a 1.50 L container and heated until the solid fully composes. Whats the final pressure in the container when the temperature of the container is 25.0 °C
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01/21/22

Mg + 2 H+(aq) Mg2+ (aq) + H2 (g) If 0.883 g of magnesium is added to 25.5 mL of 1.345 M HCl solution at 25°C and 1.00 atm, how many liters will be occupied by the dry hydrogen gas which is produced?
The vapor pressure of water at 25°C is 3.2 kPa.
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