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Chemistry
Chemistry
High School
A carbon atom has six protons, six neutrons, and six electrons. How would a Bohr model show the protons in a carbon atom?A) The particles are evenly distributed through the mass of carbon.B) Electrons from a cloud around a nucleus of protons and neutrons.C) Neutrons revolve around a nucleus of electrons and protons.D) Electrons move in fixed orbits around a nucleus of protons and neutrons.
Chemistry
College
A solution of 6.54 g of a carbohydrate in 102.5 g of water has a density of 1.024 g/mL and an osmotic pressure of 4.61 atm at 20.0C. Calculate the molar mass of the carbohydrate.
Chemistry
High School
Answer number 5 please if you say for point I will report you:)
Chemistry
High School
An air plane is flying at a crusing speed of 200 miles per hour for 3 hours. How far would the plane fly?
Chemistry
High School
In which of the following situations would it be helpful to create a line graph?A. When comparing a patient's baseline blood pressure to his bloodpressure while walkingB. When illustrating how much time a patient spends exercisingversus doing other activitiesC. When recording a patient's height and weight during one visitD. When measuring a patient's height growth over 10 years
Chemistry
High School
how many ions are present in 75.0g of magnesium sulfateHELP ASAP PLEASEEtime limit on computer so pleaseBrainlest and thanks
Chemistry
College
How many moles are in 120g of NH3
Chemistry
High School
............................hhh look at the picture
Chemistry
Middle School
Plz answer correctly and make sure u put it in order
Chemistry
High School
CaC2 + 2H2O C2H2 + Ca(OH)2 If 2.8 moles of CaC2 are consumed in this reaction, how many grams of H2O are needed?
Chemistry
High School
Select the correct answer.Which is true with respect to the kinetic energy of a molecule?A. it is the lowest at low temperaturesB. it increases at low temperaturesC. it is the same at all temperaturesD. it is the lowest at high temperatures
Chemistry
High School
PLEASE HELP ME ANSWER
Chemistry
High School
What are the two toxic byproducts of incomplete combustion?Select one:a. oxygen, carbon monoxideb. carbon, oxygenc. water, carbon dioxided. carbon, carbon monoxide
Chemistry
College
When 3.00 moles of hydrogen molecules and 1.50 moles of oxygen molecules react, they form 3.00 moles of wateraccording to the reaction below.2H, + O2 + 2H2OHow many grams of oxygen were required?
Chemistry
High School
How many atoms of each element are in one molecule of the product?
Chemistry
High School
Calculate the number of moles in 24.18 liters of neon gas at STP.
Chemistry
High School
compare the mass number and atomic number for isotopes of an element. Explain your answer
Chemistry
High School
AH for the reaction:SO 2 (g) S (s) + O2 (g)
Chemistry
College
What is meant when the symbol C-12 is used?
Chemistry
High School
Help pls!! Question number 7
Chemistry
College
TRUE or FALSE: Broken wires or water can cause a long circuit. O True O False
Chemistry
High School
How many grams of ammonia (NH3) can be produced when 25 g of nitrogen gas reacts with 28 grams of hydrogen gas
Chemistry
High School
PLEASE ANSWER AS SOON AS POSSIBLECharlie has three samples of the same substance. The substance is a dark, dull, cube with a volume of 6 milliliters. Charlie is going to place all three samples in a circuit to see if they will conduct electricity. Sample A has a mass of 4 grams, sample B has a mass of 8 grams, and sample C has a mass of 10 grams. If sample C completes the circuit, showing that the sample does conduct electricity, which of the following statements is true?A. samples A and B will also conduct electricity because conductivity is an intrinsic physical property.B. samples A and B will also conduct electricity because conductivity is an extrinsic physically.C. samples A and B will not conduct electricity because conductivity is an intrinsic physically. D. samples A and B will not conduct electricity because conductivity is an extrinsic physically.
Chemistry
College
The multistep smelting of ferric oxide to form elemental iron occurs at high temperatures in a blast furnace. In the first step, ferric oxide reacts with carbon monoxide to form FeO. This substance reacts with more carbon monoxide to formiron(II) oxide, which reacts with still more carbon monoxide to form molten iron. Carbon dioxide is also produced in each step.(a) Write an overall balanced equation for the iron-smelting process. (b) How many grams of carbon monoxide are required to form 45.0 metric tons of iron from ferric oxide?
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