ATIVIDADES Responde as questõesi

1 - Explique em poucas palavras o que são as transformações físicas e as transformações químicas.

De exemplos.

- Um aluno, eo realizar determinado experimento, registrou as observações a seguir."Ao misturar

10 g de um liquido incolor e inodoro com 10 g de um liquido também incolor, com odor desagradá-

vel semelhante ao de ovo estragado, observou a formação de 20 g de um sólido preto, sem cheiro.

Durante a transformação, a temperatura do sistema aumentou 15°C."

a) A transformação descrita é fisica ou quimica? Justifique sua resposta.

b) Transcreva as observações do aluno para uma tabela, indicando o estado inicial e o estado

final do processo

Estado final

Estado Inlela

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Ineed someone to see if my answers are correct! if any are wrong let me know what the correct answers would be and how to get that answer! 1. how many moles of sodium chloride are in 28 grams od nacl? a. 265 mole naclb. 856 mole naclc. 479 mole of nacld. 1.2 mole nacl < my choice2. 734 grams of lithium sulfate (li2so4) are dissolved to make 2500 ml of solution what is rhe molaratiy? a. 2.67 mb. 4.56 mc. 3.89 m < my choiced. 1.78 m3. how many grams of cacl2 would be dissolved in 3.0 l of a 0.50 m solution of cacl2? a. 250 g cacl2 b. 166.5 g cacl2c. 113.65 g cacl2d. 98 g cacl2 < my choice4. suppose you had 58.44 g of nacl and you dissolved it in exactly 2.00 liters. the molarity if the solution would be 0.5 mtrue < my choicefalse 5. i would need 22g of naoh to make a 3.0 m solution using 250 ml of solvent.true < my choicefalse6. identify the solute: you have a .0195 m solution made from using 6.5 g of solute and 3 l of solvent. identify the solute by solving for molar weight.a. the solute is nacl because the molar weight is 58.43 g/mol < my choiceb. the solute is h2so4 because the molar weight is 98.06 g/molc. the solute is cacl2 because the molar weight is 111.11 g/mol