All categories

3 years ago

Which clue can be used to identify a chemical reaction as a combustion reaction

Chemistry

2 answers:

melisa1 [442]3 years ago

5 0

i think it’s B. a hydrocarbon reacts with oxygen
if i’m correct, a combustion reaction is anything that’ll give a reaction

kogti [31]3 years ago

5 0

Answer:

A hydrocarbon reacts with oxygen

Explanation:

The other options are incorrect because:

oxygen is a reactant

water and carbon dioxide are products

the reaction doesn't involve ions

Other characteristics of combustion are the presence of: a flame, heat, ashes and smoke.

You might be interested in

Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients NH3(g) + O2(g) + CH4(g)

alexira [117]

Answer:

$2NH_{3 (g)} + 3O_{2 (g)} +2CH_{4 (g)} --> 2HCN_{(aq)} + 6H_{2}O_{(l)}$

Explanation:

5 0

3 years ago

Please help!!<br> I don’t understand

laiz [17]

<h3>Answer:</h3>

150 g Si

<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
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Use Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 3.2 × 10²⁴ atoms Si

[Solve] grams Si

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

Avogadro's Number

[PT] Molar Mass of Si - 28.09 g/mol

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 3.2 \cdot 10^{24} \ atoms \ Si(\frac{1 \ mol \ Si}{6.022 \cdot 10^{23} \ atoms \ Si})(\frac{28.09 \ g \ Si}{1 \ mol \ Si})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 149.266 \ g \ Si$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. Instructed to round to 2 sig figs.</em>

149.266 g Si ≈ 150 g Si

4 0

3 years ago

A scientist evaluates its livestock and determines which livestock it is

Rina8888 [55]

Any animals look for steangth mostly because the offspring can probobly onther trait is looks. The male will try to impess the female.

4 0

3 years ago

Heather mixes two white liquids together. Immediately, a gray liquid forms.

Klio2033 [76]

The grey liquid is related to the white liquids because the change in colour is the result of a chemical change/reaction between the two white liquids.

4 0

3 years ago

What is the momentum of a 750-kg car traveling at a velocity of a 25 m/s?

hichkok12 [17]

Momentum = mass x velocity 750x25 = 18750 kg-m/s.

3 0

3 years ago