Is cutting a paper snowflake a chemical or physical change and why?

How many kilowatt hours does it take to lift an apple that weighs 100g 1 meter. (use 9.8 kg m/s2 for the force of gravity)

MnCl₂ (aq) + (NH₄) ₂CO₃ (aq) - -> MnCO₃ (s) + 2 NH₄Cl (aq)

The lifting force on an airplane's wing does which of the following? O A. Increases gravity O B. Increases with speed O C. Decreases with speed D. Overcomes drag

For a given sample of ch3oh, the enthalpy change during the reaction is 82.3 kj. how many grams of methane gas are produced?

The law of universal gravitation was discovered by.

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.