A procedure calls for 4 parts reagent A to 16 parts water.What is the dilution of reagent A in water?

a) 4/16

b) 1/5

c) 1/4

d) 4/12

my guess answer iss 1/4 if incorrect sorr

**1/5 is the dilution of reagent A in water.**

**Explanation:**

[tex]D.F.=\frac{V_f}{V_i}[/tex]

Where:

D.F = Dilution factor

[tex]V_f[/tex] = Final volume of the diluted solution

[tex]V_i[/tex]= Initial volume of the undiluted solution

And the dilution is represented as 1 : D.F.**Given:**

4 parts of the reagent and 16 parts of water are mixed together to form a diluted solution.

**To find:**

The dilution of reagent A in water

**Solution:**

Parts of reagent A =[tex]V_i = 4[/tex]

Parts of water = 16

Final volume of solution = [tex]V _f = 4 + 16 = 20[/tex]

The dilution factor of reagent A:

[tex]D.F=\frac{20}{4}=5[/tex]

The dilution of the reagent A = [tex]1:5=\frac{1}{5}[/tex]

**1/5 is the dilution of reagent A in water**

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What is the density of water (in g/mL) to fouf significant figures at 6°C?

**Answer**** ****:**

**0.9999432**** ****g****/****cm****^****3**

The** density** of water in g/ml up to 4 **significant figures **at 6°C is 0.9999432 g/cm³.

**Significant figures** are used for establishment of a number which is presented in the form of digits. These digits give a meaningful representation to the numbers.

The significant figures are the significant digits which convey the meaning according to the **accuracy. **These provide** precision **to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of a non-zero digit are not significant.

4) All zeroes on right of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant

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Balancing oxidation-reduction reactions

Mg+ N2—>Mg3N2

**Answer:**

[tex]{ \sf{3Mg_{(s)} + N_{2(g)} →Mg _{3}N_{2(s)}}}[/tex]

Convert to standard notation.

9.3 x 10^-5

**Answer:**

9.3 x 10^ -5 in standard notation is 0.000093

**Explanation:**

Since 10 is raised to a -5, this means that there should be 5 zeros before the non-zero digits

Which is larger?

1). 1 liter or 1500 milliliters

2) 12 cm or 12 milliliters

**Answer:**

1). 1 litre

2).12 cm

**Explanation:**

In 1 litre = 1000 ml whereas 1500 milliliters equals 0.15 litres and it is same for 12 cm and 12 milliliters

GIVING 20 POINTS!! Apply Concepts Two chemists each plan an investigation in which they will combine hydrogen gas with chlorine gas to observe the chemical reactivity. The plans differ in that one will use 25 milligrams each of hydrogen and chlorine, and the other will use 1000 times this amount, i.e., 25 grams each of hydrogen and chlorine. Can the investigations reach similar conclusions about the reactivity of hydrogen with chlorine? Explain.

**Answer:**

Yes, the investigations will reach similar conclusions about the reactivity of H2 and Cl2

**Explanation:**

1. The law of multiple proportions says that when elements form compounds, the proportions of the elements in those chemical compounds can be expressed in small whole number ratios. This means that regardless of whether 1000 times more of the products are used, the reactivity of the products is established by the chemical reaction

2. The law of multiple proportions is an extension of the law of definite composition, which states that compounds will consist of defined ratios of elements.

3. A reaction with more reactants will need more care because more products are produced, which can be toxic

4. H2 and Cl2 reactivity does not depend on the quantities but the chemical properties of each compound

A. Identify the type of molecule shown in the drawing. (2 points)

**Answer: 1) Caboxylic acid**

**2) Ether**

**3) Ester**

**4) Aldehyde**

**5) Amine**

**6) Alcohol**

**Explanation: The type of a molecule is based it's primary functional group. **

**https://en.wikipedia.org/wiki/Functional_group**

The **identities **of the given **molecules **shown in the **drawing **are:

1) **Carboxylic **acid.

2) Ether

3) Ester

4) Ethane

**5) Aldehyde**

6) Amine

7) **Alcohol**

**Organic **compounds are those **compounds**, which contain carbon-carbon and **carbon**-hydrogen **bonds**.

The five **organic **compounds are **lipids**, carbohydrates, **protein**, nucleotide, etc.

Thus, the correct option is 1) **Carboxylic **acid.

2) Ether

3) Ester

4) Ethane

**5) Aldehyde**

6) Amine

7) **Alcohol**

Learn more about **organic compounds**

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give any two reasons that hydrogen is kept in group 1 in Modern Periodic Table

**Answer:**

Hydrogen is usually classified as a group 1 element since it has one valence electron, just like group 1 metals.

**Explanation:**

define singular noun
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