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3 years ago

PLS HELP ME WITH MY ASSIGNMENT WILL MARK BRAINLIEST!

Chemistry

2 answers:

kkurt [141]3 years ago

7 0

Answer:

D. anions ; +1

Explanation:

Alkali metals tend to lose one electron and form ions with a single positive charge.<em> </em><u><em>'alkali metals typically lose 1 eclectron to form anions with a charge of +1".</em></u>

never [62]3 years ago

4 0

I believe it would be number 2 Cation +1

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True or False all non - metal elements are gassed at room temperature.

saul85 [17]

Answer:

false

Explanation:

you have bromine , its a non metal and liquid in room temperature

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3 years ago

Some covalent compounds dissociate into ions in water. What atom do these compounds have in their structures? What type of solut

valentina_108 [34]

H atoms are found in the molecules of covalent compounds that dissolve in water. These compound are called acids (proton donors). They form acidic solutionst{acidic solutions} acidic solutions.

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Examples are hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid solutions (HNO3).

<h3>What type of compounds dissociate in water to form ions?</h3>

When certain substances dissolve in water, they undergo either a physical or a chemical change that results in the formation of ions in solution. These substances are members of an important class of compounds known as electrolytes. Nonelectrolytes are substances that do not produce ions when dissolved.

A substance is known as a strong electrolyte if the physical or chemical process that generates the ions is essentially 100% efficient (all of the dissolved compound yields ions). A weak electrolyte is one in which only a small portion of the dissolved substance undergoes the ion-producing process.

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2 years ago

Write an expression for standard enthalpy of formation using suitable chemical reaction

Paraphin [41]

Answer: To calculate for the enthalpy of formation, it is the sum of all values of products - sum of all values of reactants.

Explanation:

I’m not sure what chemical reaction you are referencing to, but I attached an image below to help you see what I’m saying.

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3 years ago

How many grams of CO2 are produced from 6.7 L of O2 gas at STP?

Tasya [4]

<h3>Answer:</h3>

13 g CO₂

<h3>General Formulas and Concepts:</h3>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Moles
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

<u>Stoichiometry</u>

Using Dimensional Analysis

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<h3>Explanation:</h3>

<u>Step 1: Define</u>

<em>Identify variables</em>

[Given] 6.7 L O₂

[Solve] g O₂

<u>Step 2: Identify Conversions</u>

[STP] 22.4 L = 1 mol

[PT] Molar Mass of O: 16.00 g/mol

[PT] Molar Mass of C: 12.01 g/mol

Molar Mass of CO₂: 12.01 + 2(16.00) = 44.01 g/mol

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 6.7 \ L \ O_2(\frac{1 \ mol \ O_2}{22.4 \ L \ O_2})(\frac{44.01 \ g \ O_2}{1 \ mol \ O_2})$
[DA] Divide/Multiply [Cancel out units]: $\displaystyle 13.1637 \ g \ O_2$