Who originally observed the constellations in the sky?

The empirical formula of an artificial sweetener is C14H18N2O5. The molecular mass of the sweetener is 294.34 g/mol. What is the molecular formula of the artificial sweetener?

Which of the following measurements represents the most matter? 3.5 kg 350 g 3.5 x 103 hg 3.5 x 104 cg

A 215-g sample of copper metal at some temperature is added to 26.6 g of water. The initial water temperature is 22.22 oC, and the final temperature is 24.44 oC. If the specific heat of copper is 0.

consider the halogen family from fluorine to iodine which element would have the largest ionic radius?

Which of the following is the correctly balanced chemical equation for the reaction of Ca (OH) 2 and HNO3? Ca (OH) 2 + HNO, → Ca++NO; Ca (OH) 2 + 2HNO, → 2H2O+2NO- Ca (OH) 2 + 2HNO, →H, O+CaNO, Ca (OH) 2 + 2HNO, → 2H2O + Ca (NO3) 2

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?

The car wit fastest acceleration is the tempest. it has an acceleration of 6.1 m/s. suppose the car accelerates from rest to a final speed of 30. m/s. how long does it take the tempest to reach this speed?

What is the wavelength of 2.18*1016 hz wave?

Which of the following summarizes photosynthesis? A. glucose + carbon dioxide → oxygen + water B. carbon dioxide + water → glucose + oxygen + water C. oxygen + water → glucose + carbon dioxide + water D.