교과서 질문
In an old trunk, you find a piece of metal that you think maybe aluminum, silver, or lead. You take it to a lab, where you find it has a mass of 217 g and a volume of 19.2 cm³. Using TABLE2.8, what is the metal you found?
2020
views
2. Measurement and Problem Solving
Density
1:42분문제 107
교과서 질문
How many milliliters of gasoline have a mass of 1.2 kg(see TABLE2.8)? (2.7)
검증된 단계별 안내1
Identify the density of gasoline from TABLE 2.8. Density is typically given in units of kg/L or g/mL.
Convert the mass of gasoline from kilograms to grams if necessary, since density might be given in g/mL.
Use the formula for density: \( \text{Density} = \frac{\text{Mass}}{\text{Volume}} \). Rearrange this formula to solve for volume: \( \text{Volume} = \frac{\text{Mass}}{\text{Density}} \).
Substitute the mass of gasoline and the density value into the rearranged formula to calculate the volume in liters or milliliters.
If the volume is calculated in liters, convert it to milliliters by multiplying by 1000, since 1 L = 1000 mL.
비슷한 문제에 대한 검증된 영상 답변:이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Density
Density is defined as mass per unit volume and is a critical property of substances. It is usually expressed in grams per milliliter (g/mL) or kilograms per liter (kg/L). To find the volume of a substance when its mass and density are known, the formula Volume = Mass/Density is used. Understanding density allows us to convert between mass and volume, which is essential for solving the given question.
추천 영상:
가이드 코스
01:56
Density
Units of Measurement
In chemistry, it is important to be familiar with various units of measurement, particularly when dealing with mass and volume. Mass is often measured in grams (g) or kilograms (kg), while volume can be measured in liters (L) or milliliters (mL). Converting between these units is crucial for accurate calculations, especially when using density to find the volume of a substance from its mass.
추천 영상:
가이드 코스
03:17Measuring Radioactivity Concept 1
Gasoline Composition
Gasoline is a complex mixture of hydrocarbons and other compounds, and its density can vary based on its composition and temperature. Typically, the density of gasoline ranges from about 0.71 to 0.77 g/mL. Knowing the specific density of gasoline is necessary to accurately calculate the volume corresponding to a given mass, as indicated in the question. This variability highlights the importance of consulting reliable data sources, such as tables, for precise values.
추천 영상:
가이드 코스
01:02Dalton's Law: Partial Pressure (Simplified) Concept 3
관련 영상
관련 실천