Density is the <u>degree of the heaviness of a particular substance. </u>
- Density can also be defined as the<u> unit mass of a substance per the substance's volume.</u>
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Density is said to be the characteristic property of a pure substance because the <u>density of a pure substance</u> is <u>constant and fixed </u>
- <u>Pure substances</u> are substances that are homogenous in nature, which means they are uniform and are made up of only <u>one component.</u>
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- Density is said to be the <u>characteristic property</u> of a <u>pure substance </u>because the density of a pure substance<u> is constant and fixed</u> but its <em>mass and volume can vary. </em>
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um I believe its heat transfer, or something called ligma.
Answer:
the correct answer is A, Hg22+ on edge 2020
Explanation:
i took the review
steps that are followed in taking a stratified random sample are
i. Take a sample of size n/k from each strata, where n is the sample size and k is the number of strata
iv. Take a systematic sample from the population as a whole. Take random samples from each strata.
Stratified random sampling is a sampling method that divides the population into smaller groups called layers. Groups or hierarchies are organized based on the common characteristics or attributes of the members in the group. The process of dividing the population into groups is called hierarchization.
Stratified Random Sample Example:
Suppose a research team wants to determine a GPA for a college student in the United States. The research team is having a hard time collecting data from all 21 million college students. We decided to use 4,000 students to extract a random sample of the population.
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