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Porcentajes
Matemáticas
Middle School Math
Porcentajes

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Porcentajes
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1.	Una muestra de mineral se encuentra que está0.0048% gold and0.07% silver. What is the percent of matter in the ore that is neither gold nor silver?

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3.	A sample of clay is found in Mongolia that contains aluminum, silicon, hydrogen, magnesium, iron, and oxygen. The amount of iron is equal to the amount of aluminum. If the clay is25% silicon,18% hydrogen,8% magnesium and22% oxygen, what is the percent iron?

Morgan performed an analysis on some water from Bigtown Lake. She tested three samples and found the lead concentrations to be in parts per million (micrograms per milliliter or mg per liter) to be0.005,0.009, and0.044respectively. What was the average mass of lead? Round your answer to the nearest thousandth.

Zachary and Kaitlyn were working as partners on a chemistry experiment. They had just synthesized a white crystalline compound that precipitated to the bottom of the beaker. They weighed the compound (after drying it) and found they had6.55gramos. Según su instructor el rendimiento máximo para el experimento fue8.48gramos. ¿Qué por ciento del máximo lograron ellos? Redondea su respuesta al más cercano centésimo de un por ciento.

6.	¿Cuál es la concentración (en%) de una solución de650ml de agua que tiene19gramos de cloruro de bario disuelto en ella? Redondea su respuesta al más cercano centésimo parte de un por ciento si es necesario.

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Porcentajes
Matemáticas
Middle School Math
Porcentajes

This worksheet still contains English.
edHelper is working on the translation