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3 years ago

Describe the formation of elements in stars by nuclear fusion of hydrogen and helium

1 answer:

3 0

At the point when the new star arrives at a specific size, a cycle called atomic combination lights, creating the star's tremendous vitality. The combination cycle powers hydrogen molecules together, changing them into heavier components, for example, helium, carbon and oxygen.

^ already paraphrased so no need to change up anything !!

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3 points

melamori03 [73]

D) The same number of each type of atom will always be present before and after a chemical reaction takes place.

Mass is never created or lost in a chemical reaction, so the atoms of each element must stay balanced.

8 0

3 years ago

An Isolated system could be best described as a _______________.

grandymaker [24]

Hello Mate!

Well, there are many definitions and descriptions of isolated systems, and here are some of them:

1. It can be a physical system which is located very very far from all other systems, so there is absolutely no interaction between them, thus making it isolated.

2. It can be a thermodynamic system with rigid walls, which prevents mass and energy to pass through.

I Hope my answer has come to your Help. Thank you for posting your question here in $Brainly.$ We hope to answer more of your questions and inquiries soon. Have a nice day ahead! :)

$(Ps. Mark As Brainliest IF Helped!)$

$-TheOneAboveAll :D$

5 0

4 years ago

Does photosynthesis release engrey

juin [17]

Answer:

Photosynthesis uses light energy to convert carbon dioxide and water into glucose and oxygen gas. ... Cellular respiration is the complementary reaction to photosynthesis, because it is the reaction that cells use to break down glucose molecules and release ATP.

5 0

3 years ago

A neutralization reaction between an acid and sodium hydroxide formed water and the salt named sodium sulfate. What was the form

myrzilka [38]

Answer: The formula of the acid that was neutralized is $H_2SO_4$

Explanation:

Neutralization is a chemical reaction in which acid and base combine to form salt and water. Acids donate $H^+$ and bases donate $OH^-$ in water which combine to form water molecules.

As the salt formed is $Na_2SO_4$ , the acid must contain $SO_4$ and thus the acid is $H_2SO_4$

The balanced chemical reaction is ;

$H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O$

The formula of the acid that was neutralized is $H_2SO_4$

3 0

4 years ago

What mass (g) of magnesium nitride (Mg3N2) can be made from the reaction of 1.22 g of magnesium with excess nitrogen? __Mg + __N

Citrus2011 [14]

<h3>Answer:</h3>

1.69 g Mg₃N₂

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

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table

<u>Stoichiometry</u>

Using Dimensional Analysis
Reactions RxN

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Unbalanced] Mg + N₂ → Mg₃N₂

[RxN - Balanced] 3Mg + N₂ → Mg₃N₂

[Given] 1.22 g Mg

[Solve] grams Mg₃N₂

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

[RxN] 3 mol Mg → Mg₃N₂

[PT] Molar Mass of Mg - 24.31 g/mol

[PT] Molar Mass of N - 14.01 g/mol

Molar Mass of Mg₃N₂ - 3(24.31) + 2(14.01) = 100.95 g/mol

<u>Step 3: Stoich</u>

[DA] Set up: $\displaystyle 1.22 \ g \ Mg(\frac{1 \ mol \ Mg}{24.31 \ g \ Mg})(\frac{1 \ mol \ Mg_3N_2}{3 \ mol \ Mg})(\frac{100.95 \ g \ Mg_3N_2}{1 \ mol\ Mg_3N_2})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 1.68873 \ g \ Mg_3N_2$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

1.68873 g Mg₃N₂ ≈ 1.69 g Mg₃N₂

8 0

3 years ago