Explain certain and uncertain numbers count

Assignment Help Chemistry
Reference no: EM13552161

what is the difference between a certain number and an uncertain number in a measurement? which certain and uncertain numbers count as the significant figures of a measurement?

Reference no: EM13552161

Questions Cloud

Define ethane and methane is contained a glass bulb : A mixture of ethane and methane is contained a glass bulb of 500 cm^3 capacity at 25 degree celsius. the pressure is 1.25 bar and the mass of the gas in the bulb is 0.53 grams. what is the average molar mass and what is the mole fraction of methan..
Estimate where should the third charge be located : A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.54 m. Where should the third charge be located
Obtain the acceleration of the proton : A proton high above the equator approaches the Earth moving straight downward with a speed of 345m/s. Find the acceleration of the proton
Plan of action for encouraging ethical behavior : Select a small business with which you are familiar and develop a plan of action for encouraging ethical behavior. Provide specific examples to support your response.
Explain certain and uncertain numbers count : What is the difference between a certain number and an uncertain number in a measurement. which certain and uncertain numbers count as the significant figures of a measurement
What type of test should be conducted : What type of test should be conducted?
Calculate what is the volume of the wood : A piece of wood with a density of 730 kg/m3 is tied with a string to the bottom of a water-filled flask. What is the volume of the wood
Evaluate the standard enthalpies of the reactions : Using the standard enthalpies of combustion, calculate the standard enthalpies of the following reactions: A. C2H5OH(l)+3O2(g)>2CO2(g)+3H2O(l)
Estimate what is the change in the photons wavelength : A photon scatters off an electron at an angle of 180° with respect to its initial motion. What is the change in the photon's wavelength

Reviews

Write a Review

Chemistry Questions & Answers

  The naturally occurring compound urea conh22 was first

the naturally occurring compound urea conh22 was first synthesized by friedrich wohler in germany in 1828 by heating

  Explain does the iron in the fe(nh4)2so4 solutions function

Does the iron in the Fe(NH4)2SO4 solutions function as an oxidizing agent or a reducing agent. Please explain

  What is the percent yield

If 42.3 L of PH3 forms when 85.1L of H2 (g) reacts with 167.6 (g) of P4 at STP. What is the percent yield.

  Explain the empirical formula for the compound formed

A 1.525 g sample of a compound between sulfur and oxygen was prepared by burning 0.7625 g of sulfur in air and collecting the product. What is the empirical formula for the compound formed

  Explain what is the identity of the element x

An element X forms the oxalate complex X2C2O4 which is 7.91% C and 21.07 % O by mass. What is the identity of the Element X

  State what is the least amount of energy that can be emitted

what is the least amount of energy that can be emitted by an excited electron in a hydrogen atom falling from an excited state directly to the n=3 state? what is the quantum number n for the excited state

  What is the specific heat of the nickel

100.0 g of nickel at 150 °C was placed in 1.00 L of water at 25.0 °C. The final temperature of the nickel-water mixture was 26.3 °C.

  Explain the table of first ionization energy

Looking at the table of first ionization energy, if the n=1 shell held 3 electrons max instead of 2, then the first ionization energy for Li(g) would be around _____ MJ/mol.

  Draw all of the stereoisomers

When a chiral carbon contains a hydrogen, you should not show the hydrogen, but you must use either a wedge or dashed bond and 2 sticks to establish stereochemistry.

  Amount of solid deposited at the bottom of the flask

The surface area of 100 g of glucose > than that of 1 g. give explanation why the solubility does not increase with the amount of solid deposited at the bottom of the flask?

  Explain the rydberg equation to calculate the wavelength

Use the rydberg equation to calculate the wavelength (in nm) of the photon emitted when an electron in a hydrogen atom undergoes a transition from n=4 to n=2.

  Define what are the total pressure and the partial pressures

Hydrogen (H2(g)), 100.L at 380.mm Hg reacts at 150°C in a 110.L container with oxygen O2(g) (10.0L at 3.00 atm) to give water (H2O(g)). (a) How many moles of H2O(g) much water is formed? and (b) What are the total pressure and the partial pressure..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd