State the element or compound without a doubt

Assignment Help Chemistry

Reference no: EM13545478

How do scientists know what is the composition of something? i.e. when they mention that "oxygen was obtained" how can they identify the element or compound without a doubt?

Reference no: EM13545478

Questions Cloud

Obtain the initial rate of increase of current in circuit : An inductor with an inductance of 2.60H and a resistor with a resistance of 14.0ohms are connected to the terminals of a battery with an emf of 7.00V, obtain the initial rate of increase of current in circuit

Explain what mass of lead would have an identical volume : You have a 22 g sample of ethanol with a density of 0.7893 g/mL. What volume of ethanol do you have. What mass of lead (density 11.4 g/cm3) would have an identical volume to 14.1 g of mercury (density 13.6 g/cm3).

Evaluate the phase angle of the source voltage : A 160(ohm) resistor is in series with a 8.00×10^-2 H inductor and a 0.400uF capacitor. compute the phase angle of the source voltage with respect to the current

Evaluate the initial concentration of formic acid : A solution of formic acid (HCOOH, Ka = 1.8 x 10^-4) has a pH of 2.70. Calculate the initial concentration of formic acid in this solution.

State the element or compound without a doubt : How do scientists know what is the composition of something. i.e. when they mention that "oxygen was obtained" how can they identify the element or compound without a doubt

State the formula of the compound sodium and iodine : Write the formula of the compound that would be formed between these two elements: sodium and iodine; hydrogen and sulfur; aluminum and selenium.

Evaluate the concentration of iodate ions : Calculate the concentration of iodate ions in a saturated solution of lead(II) iodate if Ksp = 2.6 × 10-13.

What is the mass of water at the end : A 150-g block of ice at 0°C is placed in an insulated thermos containing 568 g of water at 29°C. What is the mass of water at the end

Explain the half-life in minutes of substance a : In a laboratory class one student group found that 26.6% of A had isomerised after a period of 15.0 minutes when the temperature was maintained at 84.5 °C. What is the half-life in minutes of substance A at that temperature

User Account

All Pages