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3 years ago

Select the correct answer.

Chemistry

2 answers:

Alex3 years ago

7 0

no:A

is a correct answer

Nina [5.8K]3 years ago

7 0

Answer: A

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In lab an experiment was performed to determine the empirical formula of magnesium

Nat2105 [25]

Answer:

The correct option is

C) Trial 1 will have the same calculated empirical formula as trial 2.

Explanation:

The empirical formula is the formula of a chemical compound that states the simplest whole number ratio of each of the atoms included in the compound. It is obtained by dividing the mass of an element present in the compound by the element's molar mass to find the mole ratio of the elements. The obtained mole value for each element is then divided by the smallest number of moles obtained in the division.

By definition the composition and ratio of elements combined in a chemical compound is fixed, therefore trial 1 will have the same calculated empirical formula as trial 2.

5 0

3 years ago

The rows from left to right in the periodic table is called what

Mandarinka [93]

Answer:

The periodic table has rows that go left to right and columns that go up and down, just like any other grid. The rows are referred to as PERIODS, while the columns are referred to as GROUPS.

Explanation:

7 0

3 years ago

Write the formula for a complex formed between zn2 zn2 and nh3nh3 with a coordination number of 3.

fredd [130]

Triammine zinc sulfate is the formula for a compound produced between zn2 and nh3 with a coordination number of 3.

<h3>Steps</h3>

Zinc atoms are present in the +2 oxidation state in zinc sulfate (ZnSO4).

Thus, a coordination complex formed by three ammonia ligands and zinc sulfate can be shown below.

NH3 + ZnSO4 = [Zn(NH3)] SO4

In its ionic form, this equation can be expressed as

Zn²⁺ + 3NH₃ = [Zn(NH₃)₃]²⁺

<h3>Coordination number: what is it?</h3>

The number of atoms, ions, or molecules that a central atom or ion in a complex, coordination compound, or crystal holds as its closest neighbors.

<h3>What is a good illustration of a coordination number?</h3>

For instance, [Cr(NH3)2Cl2Br2] has the core cation Cr3+, which is referred to as hexacoordinate and has a coordination number of 6.

learn more about coordination number here

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3 0

2 years ago

Liquid methylene bromide has a density of 2.50 g/mL. A barometer is constructed using methylene bromide instead of mercury. If t

vova2212 [387]

Answer:

393 cm

Explanation:

Step 1: Given and required data

Density of liquid methylene bromide (ρ): 2.50 g/mL (2.50 g/cm³)

Earth's gravity (g): 9.81 m/s²

Atmospheric pressure (P): 0.950 atm

Step 2: Convert 0.950 atm to Pa (N/m²)

We will use the conversion factor 1 atm = 101325 Pa.

0.950 atm × 101325 Pa/1 atm = 9.63 × 10⁴ Pa

Step 3: Convert 2.50 g/cm³ to kg/m³

We will use the conversion factors:

1 kg = 10³ g

1 m³ = 10⁶ cm³

$\frac{2.50g}{cm^{3} } \times \frac{1kg}{10^{3}g } \times \frac{10^{6}cm^{3} }{1m^{3} } = 2.50 \times 10^{3} kg/m^{3}$

Step 4: Calculate the height (h) of the liquid column

We will use the following expression.

P = ρ × g × h

h = P / ρ × g

h = 9.63 × 10⁴ Pa / (2.50 × 10³ kg/m³) × 9.81 m/s²

h = 3.93 m = 393 cm

7 0

3 years ago

HELP ASAP Is this atom more likely to gain electrons or to lose electrons? Explain how you can tell.

Zina [86]

It is more likely to gain electrons because it wants to achieve the “8 electron configuration”. So because it has 16 electrons it will gain 2 electrons more

6 0

3 years ago