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Chemistry
College
I am timed please help!!
Chemistry
High School
What is the mass of an atom with 7 protons, and 7 neutrons?
Chemistry
High School
If I fill a tall glass with water and then transfer the water to a shorter glass, it appears there is more water. Is there more water?
Chemistry
High School
What is a property in Science how much space an object takes up something that changes all the timea characteristic or a quality of an object or substance a spoon
Chemistry
College
Calculate the percent composition for each of the elements in Na3PO4. A 5.00 gram sample of an oxide of lead PbxOy contains 4.33 g of lead. Determine the simplest formula for the compound. Balance the following equations by inspection: Cu(N03)2 rightarrow CuO + NO2 + O2 C2H6 + O2 rightarrow CO2 + H2O Mg3N2 + H2O rightarrow Mg(OH)2 + NH3 Magnesium (Mg) reacts with chlorine gas (C12) to produce magnesium chloride (MgC12). How many grams of Mg will react with 2 moles of Cl2? Mg(s) + C12(g) rightarrow MgC12(s) The compound P4S3 is used in matches. It reacts with oxygen to produce P4O10 and SO2. The unbalanced chemical equation is shown below, P4S3(s) + O2(g) rightarrow P4O10(s) + SO2(g) What mass of SO2 is produced from the combustion of 0.331 g P4S3 in excess O2? Nitric oxide is made from the oxidation of ammonia. What mass of nitric oxide can be made from the reaction of 8.00 g NH3 with 17.0 g O2? 4 NH3(g) + 5 O2(g) rightarrow 4 NO(g) + 6 H2O(g) To what volume should you dilute 50.0 mL of 12 M HNO3 solution to obtain a 0.100 M HNO3 solution?
Chemistry
High School
why can't a beaker be used to measuring the volume of a liquid
Chemistry
College
Complete hydrolysis of a hexapeptide gives 2 Gly, Leu, Phe, Pro, and Tyr. Reaction of the peptide with phenylisothiocyanate gave the phenylthiohydantoin of Pro. Partial hydrolysis of the peptide gave the following fragments: Phe-Gly-Tyr, Gly-Phe-Gly, Pro-Leu-Gly, Leu-Gly-Phe. What is the structure of the peptide
Chemistry
College
Solve: (6.825 x 10-3) (1.2 x 10-8)Choose the answer with the correct number of significant figures.a 8.2 x 10-11b 0.081 x 10-8C 8.01 x 1011d None of the above
Chemistry
College
Metal atoms always form a cation of a single, specific charge.a.) True, because metal atoms form ionic compounds of a known composition.b.) False, because some metal atoms are known to have more than one possible positive charge.c.) True, because nonmetal atoms always form anions of a single, specific charge.d.) True, because metal atoms lose all of their valence electrons.e.) False, because elements in different rows of the periodic table can form different cations.
Chemistry
College
Which wave has the greatest distance from trough to trough?
Chemistry
High School
Wood has a density of 0.531 g/cm3. What is the volume of 44 grams of wood?
Chemistry
High School
given: f(x) 3x-1. g(x) 2x^2-3=(3x-1) + (2x^2-3)= 3x-1 + 2x^2-3=5x^2-4can someone tell me if its correct, im not sure if i am ;-;
Chemistry
High School
describe how changing the particles changed the atom
Chemistry
College
What determines the reactivity of an akali metal?
Chemistry
College
12.A piece of magnesium is in the shape of a cylinder with a height of 5.62 cmand a diameter of 1.34 cm. If the magnesium sample has a mass of 14.1 g, whatis the density of the sample?
Chemistry
High School
If identical rocket ships were lifting off from Earth and Neptune, whichrocket would need more force for lift off and why.
Chemistry
College
Sample of carbonate rock is a mixture of CaCO3 and MgCO3. The rock is Analyzed in a laboratory and the results are recorded in the table above. Which columns in a table provide all the information necessary to determine the mole ratio of analyzed in a laboratory and the results are recorded in the table above. Which columns in a table provide all the information necessary to determine the mole ratio of Ca to Mg in the rock
Chemistry
High School
help? This is science btw
Chemistry
High School
HURRY I WILL GIVE BRAINLIEST Which would be a common-sense practice in a lab environment? keeping quiet about accidents washing hands before the lab taking a water bottle to drink scratching ones face during the lab
Chemistry
High School
B578 g343 9722 gwhich is more dense?
Chemistry
College
How many cm are in 29.7km?
Chemistry
College
Can someone please help me with this? :(
Chemistry
High School
Refer to this portion of the periodic table to answer the question that follows.34Lithium BerylliumLi Be6.939 9.012182.1 2,25BoronB10.812,37NitrogenN14.00672,68Oxygen015.99942,69FluorineF18.99842,712.0112,420.1832,8Which element in this group would be the least likely to react with other elements?aBoronbLithiumOxygenNeond
Chemistry
College
The particles of a gas inside a balloon are experiencing an increase in their average kinetic energy and the number of collisions with the wall of the balloon. What is the most likely outcome? higher gas pressure inside the balloon higher air pressure outside the balloon a decrease in gas temperature inside the balloon a large increase in air temperature outside the balloon
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