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2 years ago

Help plz 50 points <3

Chemistry

1 answer:

Rufina [12.5K]2 years ago

8 0

Answer:

I believe the answer is the last one answer D: Neutral elements

Explanation:

Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. ... Ionic compounds are typically neutral. Ionic compounds generally form between elements that are metals and elements that are nonmetals.

Hope this helps please mark brainliest :)

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Given the following chemical reaction:202 CH4 CO2 2 H20What mass of CH4 is required to completely react with 100 grams of O2?

Helga [31]

Molar mass:

O₂ = 32.0 g /mol CH₄ = 16.0 g/mol

2 O₂ + CH₄ = CO₂ + 2 H₂O

2 x 32 g O₂ ---------------> 16 g CH₄
100 g O₂ ------------------> ( mass of CH₄)

mass of CH₄ = 100 x 16 / 2 x 32

mass of CH₄ = 1600 / 64

= 25 g of CH₄

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4 years ago

Observe the concentrations of the hydronium ions(H3O+), hydroxide ions(OH-), and water (H2O) in the “Water Components” chart on

tia_tia [17]

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3 years ago

An element, X, can form a chloride (XCl3) and an iodide (XI3). The chloride can be converted quantitatively into the iodide when

Arlecino [84]

Answer : The chemical symbol for this element is, (La)

Explanation : Given,

Mass of $XCl_3$ = 0.760 g

Mass of $XI_3$ = 1.610 g

The given chemical reaction is:

$2XCl_3+3I_2\rightarrow 2XI_3+3Cl_2$

First we have to calculate the moles of $XCl_3$ and $XI_3$ .

$\text{Moles of }XCl_3=\frac{\text{Mass of }XCl_3}{\text{Molar mass of }XCl_3}$

Molar mass of Cl = 35.5 g/mole

Let the molar mass of element 'X' be, M

$\text{Moles of }XCl_3=\frac{0.760}{[M+3(35.5)]}$

and,

$\text{Moles of }XI_3=\frac{\text{Mass of }XI_3}{\text{Molar mass of }XI_3}$

Molar mass of I = 126.9 g/mole

Let the molar mass of element 'X' be, M

$\text{Moles of }XI_3=\frac{1.610}{[M+3(126.9)]}$

From the balanced chemical reaction we conclude that,

The moles of ratio of $XCl_3$ and $XI_3$ is, 1 : 1

That means,

$\frac{0.760}{[M+3(35.5)]}=\frac{1.610}{[M+3(126.9)]}$

$\frac{0.760}{[M+106.5]}=\frac{1.610}{[M+380.7]}$

$M=138.667g/mol$

From this we conclude that the element (X) is lanthanum (La) that has molecular weight, 138.667 g/mol.

Hence, the chemical symbol for this element is, (La)

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4 years ago

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4vir4ik [10]

The answer to this question is 850 kilometers

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3 years ago

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DochEvi [55]

Answer:

Explanation:

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3 years ago