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A 500 Kg crate is carried horizontally at a constant speed of 7m/s. What is the Kinetic energy of the crate?

Balance this Chem Equation?

Liquid A has a density of 0.7 g/cm^3 Liquid B has a density of 1.6 g/cm&3 140g of liquid A and 128g of liquid B are mixed to make liquid C?

CHEMISTRY PLEASE HELP! :why do you seldom see high-boiling solvents used as recrystallization solvents?

Explain how the combination of electrons, protons and neutrons results in the neutral charge of an atom?

what is the difference between a chlorite ion and a chlorate ion?

What is the concentration in g.dm-3 of 0.200M of KOH solution?

predict the changes in equilibrium position for this reaction when the following changes are made. in each...?

If 1 mL of a liquid weigh 0.79 gram, what is the density of this liquid in g/mL? Can anyone help me step by step?

you need 0.0100 mole of lead (2) chromate. How mush should you weigh on the scale?

based on intermolecular forces, which of these substances would have the highest boiling point? He O2 Ch4 NH3?

As bullet points, describe the key steps in preparing magnesium sulfate crystals from magnesium and sulfuric acid?

what metallic compound forms when sulfuric acid reacts with magnesium metal?

why does water expand on freezing?

How does temperature affects the value of Kc or Kp?

whats the mechanism for this Isomerization?

What is its IUPAC name? https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRG3G78nSltOJW4o2B_61dRNgk00mLarFvqfTw6Kp5saFLZBT_d?

If a 1.8 molal solution of nitric acid is needed in an experiment, 25 g of the solute are available, how many grams of water must be added?

What is the density and molar mass of a gas?

i got test tomorrow!!!?

Which of the reagents listed below would serve as the basis for a simple chemical test to distinguish between (CH3)3COH and (CH3)2CHCH2OH ?

Please help Asap!?

Delta H*f is 0 except for?

The reversible chemical reaction A+B⇌C+D has the following equilibrium constant: Kc=[C][D][A][B]=5.0?

If 1.93 g of Ar are added to 4.00 atm of He in a 2.00 L cylinder at 27.0 °C, what is the total pressure of the resulting gaseous mixture?

are these compounds ionic or molecular?

What is the concentration in ppm of Pb in 6.58 x 10^-3 moles Pb(NO3)2 per liter of solution? Show your work please.?

How many mL of 0.122M MnO4- are required?

the rate constant of first order reaction at 7°C& 57°C are 7.0*10^-7 & 9.0*10^-4 mole / litresecond calculate value of rate const at127°C?

Which is the smallest atom? A. Rubidium (Rb) B. Lithium (Li) C. Potassium (K) D. Sodium (Na)?

What mass of ammonia is consumed by the reaction of 8.45g of oxygen gas?

Chemistry help please?

In order to prepare 50.0 mL pf 0.100 M of NaCl you will add ____ grams of NaCl to ____ mL of water. Help!!?

when acidified potassium permanganate is mixed with a reducing agent, what will be the observation?

2.45 g of an unknown gas at 79 °C and 1.00 atm is stored in a 2.55-L flask. What is the molar mass of the gas?

Chem help!?

Energy by wavelength?

If a 50.00 kg sample of copper (0.385 J/(g·K)) initially at 5.0 oC is struck by 2.50 moles of 364 nm photons, and all of the energy of the..?

Chemistry HELP!?

how do you calculate mass and relative molecular mass using the ideal gas equation?

How do you read this?

Which of the following represents an endothermic reaction?

87.0 mL of a 0.400 M stock solution must be diluted to 0.100 M. Assuming the volumes are additive, how much water in mL should you add?

Chemistry dilution equation?

CHEM HELP: A monoatomic ion has a charge of 1+. This ion has 18 electron and 20 neutron?

General Chemistry HELP!?

pH of a buffer help?

Chemistry question please help?

does the order of mixing have any effect on the temperature change? mixing 3M HCl + 3 M NaOH together and mixing 3M HCl and 3M KOH together?

What mass of Cu2+ ion is produced by the reaction of 0.50 g of Cu metal?