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Nadya [2.5K]
3 years ago
9

Which era did we live on in 2008

Chemistry
2 answers:
devlian [24]3 years ago
6 0

Answer:

21st century

Explanation:

lukranit [14]3 years ago
5 0
The better era tbh.......
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PLEASE HELP URGENT!!!! 20 POINTS!!!!!
andrey2020 [161]

Explanation:

  • Bar Graph.
  • Segmented Bar Graph.
  • Column Graph.
  • Whiskers Graph (also called a Box Plot)
  • Frequency Graph (Frequency Table)
  • Cumulative Frequency Table.
  • Frequency Polygon.
  • Histogram.

BAR GRAPH

The bar graph is used to compare the items between different groups over time, bar graphs are used to measure the changes over a period of time, when the changes are larger, a bar graph is the best option to represent the data.

SEGMENTED BAR GRAPH

A segmented bar graph is used to compare two categories within a data set, the whole bar represents all the data within one category. Then, each bar is separated into parts (segments) that show the percentage of each part in the second category.

COLUMN GRAPH

A column graph summarizes categorical data by presenting parallel vertical bars with a height (and hence area) proportionate to specific quantities of data for each category, this type of graph can be useful in comparing two or more distributions of nominal- or ordinal-level data.

WHISKERS GRAPH

A box and whisker plot is a way of summarizing

a set of data measured on an interval scale, it is often used in explanatory data analysis, this type of graph is used to show the shape of the distribution, its central value, and its variability.

FREQUENCY GRAPH

Frequency tables, pie charts, and bar charts can be used to display the distribution of a single categorical variable,these displays show all possible values of the variable along with either the frequency (count) or relative frequency (percentage).

CUMULATIVE FREQUENCY GRAPH

Cumulative frequency is used to determine the number of observations that lie above (or below) a particular value in a data set, the cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors.

FREQUENCY POLYGON

A frequency polygon is a graphical form of representation of data, it is used to depict the shape of the data and to depict trends, It is usually drawn with the help of a histogram but can be drawn without it as well. Frequency polygons are a graphical device for understanding the shapes of distributions.

HISTOGRAM

A histogram is used to summarize discrete or continuous data, in other words, it provides a visual interpretation of numerical data by showing the number of data points that fall within a specified range of values (called “bins”). It is similar to a vertical bar graph.

5 0
3 years ago
Number is equal to 6022 x 10^23
Juliette [100K]

Answer:

The Avogadro's number

Explanation:

the number is 6.02214x10 to the 23 power

8 0
3 years ago
ASAP MULTIPLE CHOICE
OleMash [197]
The mass of electrons , i just did the same test and got it right
7 0
3 years ago
To find the molecular formula from the empirical formula, one must determine the compounds _____
xxTIMURxx [149]

Answer:

Relative molecular of the compound or infomation like vapour density, volume occupied by a known mass of its vapour at stp, etc

Explanation:

The molecular mass of a compound is twice its vapour density. We can find the molecular formula using the relationship below:

  •    Empirical formula is the simplest formula of a compound. It repeats itself "n" times to become a molecular formula i.e (EF)ₙ = MF...... n is the number of times the empirical formula presents in a mole of the compound.
  • Most times, n is a whole number like 1,2,3,.....
7 0
3 years ago
Classify each amino acid by the chemical properties of its side chain (R group) at pH 7 . Select the amino acid that fits best i
Blizzard [7]

Answer: The amino acid that has a positively charged R group are LYSINE and ARGININE.

Explanation:

AMINO ACIDS are the basic structural units of proteins. Each amino acid contains an amino group ( -NH2) and a carboxyl group (-COOH) in its molecule. The carbon atom of amino acid to which the functional groups are attached is know as the alpha-carbon. In neutral solution, amino acids are mainly in the form of dipolar ions. Amino acids can be prepared through hydrolysis of protein by boiling with dilute hydrochloric acid.

Amino acids can be classified according to the chemical properties of its side chain (R group) at pH 7, these include:

--> Amino acids with POSITIVELY CHARGED R group

--> Amino acids with negatively charged R group

--> Amino acids with neutral polar R group

--> Amino acids with nonpolar aliphatic R group.

Amino acids with POSITIVELY CHARGED R group are those amino acids that has side chains which contain nitrogen and resemble ammonia, which is a base. Their pKa's are high enough that they tend to bind protons, gaining a positive charge in the process. Example include LYSINE and ARGININE.

4 0
3 years ago
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