Which of the following correctly represents an exothermic reaction? a making ice cubes b a candle flame c burning sugar d all are examples of exothermic reactions

What would Fiberfill represent in a atom model

A sample containing 0.213g Cl - is dissolved in 50.0ml of water how many moles of Cl - are in the solution?

Organisms can reproduce asexually or sexually. All BUT ONE of the steps below is involved in sexual reproduction. Which step describes asexual rather than sexual reproduction? The sperm fertilizes the egg to produce a zygote.

What are proteins made from? what makes each protein different from the next?

Examine the block from the periodic table for the element nitrogen, chemical symbol N. Using your knowledge of the periodic table, which of these statements is correct about nitrogen? A) All Nitrogen atoms have 7 protons.

What is a group of elements that form salts called

Which number represents an acidic pH, 4 or 9?

What would make the risk of these cancers even worse for someone who drinks alcohol?

For what reasons would modern scientists accept dalton's atomic theory but not the idea of an atom proposed by the greek philosophers?

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing chromatography sorting