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uranmaximum [27]
3 years ago
14

HELP!! I WILL CROWN BRAINLEIST FOR FAST ANSWER! The element phosporus is located to the right of the element magnesium along the

same period in the periodic table. Which best describes the relationship of the elements?
A. Magnesium has a larger atomic number.
B. Phosphorus has a larger atomic mass.
C. Magnesium is in the same category as phosphorus.
D. Phosphorus has similar chemical properties as magnesium.
Chemistry
2 answers:
Yuliya22 [10]3 years ago
7 0
B. since Phosphorus has an atomic mass of 30.974 (larger) than Magnesium which is 24.305 (smaller)
Lera25 [3.4K]3 years ago
3 0

Answer:B. since Phosphorus has an atomic mass of 30.974 (larger) than Magnesium which is 24.305 .

HOPE IT HELPS....

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A solution is made by mixing 0.82 grams of sodium acetate, 1 mL of 12 M acetic acid (pKa=4.76) and water to give a final volume
kompoz [17]

Answer:

This solution acts as an efficient buffer

Explanation:

the pH of a buffer solution can be described like this: pH=pKa+log\frac{[base]}{[acid]}

[acid]=[acetic acid]=1mL.\frac{12mol}{1000mL} . \frac{1}{1L} = 0.012M

[base]=[sodium acetate]=0.82g.\frac{1mol}{82g} .\frac{1}{1l} = 0.01M

replacing, pH=4.76+log\frac{0.01M}{0.012M} =4.84

If we add an acid, pH will decrease a little bit and if we add a base, pH wil increase a little bit.

lets supose that we change the rate by increasing [base] to 0.1, then

pH=4,76+log\frac{0.1}{0.012} = 5.68

and now lets supose that we increase [acid] to 0.1 pH=4.76+log\frac{0.01}{0.1} = 3.76

Big changes in concentration of base or acid doesn´t produce big changes in pH, in that way the mix of sodium acetate with acetic acid is a good buffer solution.

4 0
3 years ago
Graphing is an important procedure used by scientist to display the data that is collected during a controlled experiment. There
astraxan [27]

Bar graph or bar chart displays data graphically using bars

The correct values are;

1. The independent variable is the <u>month</u> of the year

2. The dependent variable is the <u>number of deer</u>

3. The title is:  <u>The number of deer counted per month</u>

The reason the above values are correct are as follows:

<u></u>

In a tabular form is given as follows;

\begin{array}{|c|cc|}Month&&\# \ of \ deer \\Sept&&38\\Oct&&32\\Nov&&26\\Dec&&20\\ Jan &&15\\Feb&&12\end{array}\right]

A. Please find attached the required bar graph (chart) created with a desktop application

1. In an investigation to assign the cause of an effect is the cause of an effect, the independent variable is the causal variable responsible for the observed effect, and it is not affected by the effect. It is the variable that is not measured

In the given data, the month of the year is not affected by the number of deer, and it is not counted, to see if there is a change, therefore, the independent variable is the <u>month</u> of the year

2. The dependent variable, is the effect variable that is measured, and it depends on the dependent variable, which is the month

Therefore, the dependent variable is the <u>number of deer</u>

<u></u>

3. An appropriate title is one that captures the information intended to be obtained from the Bar graph

An appropriate title for the bar graph is; <u>The number of deer counted per month</u>

Learn more about graphs here:

brainly.com/question/20465674

brainly.com/question/12730146

4 0
3 years ago
Should have only one variable <br> what is the word to that definition
shusha [124]
Bgvjajvjfdvhjdfagvbhjgvjhbvhjgdvjhbjvhjgv

7 0
3 years ago
Is powdered sports drink ionic or covalent ? 10pts !
Dahasolnce [82]
<h3><u>Answer;</u></h3>

Ionic

Powdered sports drink is<u> ionic </u>

<h3><u>Explanation;</u></h3>
  • <em><u>Sports drinks are beverages whose purpose is to help athletes replace water, electrolytes, and energy before and after training or competition.</u></em>
  • Sport drinks contain may contain water, fuel and electrolytes which are used to regulate fluid balances in the body. Electrolytes are molecules that have electrical charge called ions, such as calcium , potassium, sodium and chloride ions.
  • <em><u>Ionic compounds are made up of ions, that is positively charged ions and negatively charged ions which are joined together by ionic bonds. Electrolyte in sport drinks forms ionic bonds.</u></em>
7 0
3 years ago
If you use 19 mL of 0.100 M KMnO4, how many moles have you used? The answer has to be in four decimal places (do not forget the
Scorpion4ik [409]
1)

Volume = 19 / 1000 = 0.019 L

n = M * V

n = 0.100 * 0.019

n = 0.0019 moles
__________________________

2)

 M₁ * V₁ = M₂* V₂

5.0 * V₁ = 1.0 * 152

5.0 V₁ = 152

V₁ = 152 / 5.0

V₁ = 30.4 mL
______________________________________

<span>hope this helps!</span>
3 0
3 years ago
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