Which quantity repsresents the number of protons in an atom

An imaginary gas that perfectly obeys all gas laws is called a (n) ___. a) ionic gas b) perfect gas c) ideal gas d) inert gas

Determine the molarity and mole fraction of a 1.15 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.

For the diagram shown, which angles are adjacent supplementary angles? ∠1 and ∠5 ∠4 and ∠2 ∠8 and ∠7 ∠3 and ∠6

Explain how two two parents with brown skin could have a child with dark brown skin and anotherchild with light brown skin

When 1224 J of heat energy is added to 39.6 g of ethanol, C 2 H 6 O, the temperature increases by 12.6 ∘ C. Calculate the molar heat capacity of C 2 H 6 O.

How many moles of lithium are in 83 grams of lithium?

Ocean constitutes most of ___ of water a) Evaporation b) Precipitation c) Condensation d) Transpiration e) Sublimation Don't choose a random letter.

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

Is nail varnish soluble?

What is the periodic trend for atomic size from top and bottom in a group? From left to right in a period?