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2 years ago

Which sentence is a scientific statement?

Chemistry

2 answers:

tekilochka [14]2 years ago

7 0

Answer:d

Explanation:

obv

mel-nik [20]2 years ago

7 0

The answer is d for ur question

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I think that it is shear adhesion

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Butoxors [25]

Answer:

the 6 stands for the atomic number

the 12.01 stands for the atomic mass

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Qué tipo de reacción es el siguiente? CH4 + 02<br><br> CO2 + H2O

Tatiana [17]

Answer:

Combustion reaction

Explanation:

Let's consider the following balanced equation.

CH₄ + 2 O₂ ⇒ CO₂ + 2 H₂O

This reaction is known as a combustion reaction, in which a compound reacts with oxygen to form a compound of carbon and water.

If the product is carbon dioxide, the combustion is complete.
If the product is carbon monoxide or carbon, the combustion is incomplete.

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Given the unbalanced equation below, answer the following: Calculate the number of liters of 3.00 M lead (II) iodide solution pr

mr_godi [17]

The number of liters of 3.00 M lead (II) iodide : 0.277 L

<h3>Further explanation</h3>

Reaction(balanced)

Pb(NO₃)₂(aq) + 2KI(aq) → 2KNO₃(aq) + PbI₂(s)

moles of KI = 1.66

From the equation, mol ratio of KI : PbI₂ = 2 : 1, so mol PbI₂ :

$\tt \dfrac{1}{2}\times 1.66=0.83$

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}$

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So the number of liters(V) of 3.00 M lead (II) iodide-PbI₂ (n=0.83, M=3):

$\tt V=\dfrac{n}{M}\\\\V=\dfrac{0.83}{3}\\\\V=0.277~L$

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2 years ago

Which process represents a chemical change?(1) melting of ice(2) corrosion of copper(3) evaporation of water(4) crystallization

miskamm [114]

(2) Corrosion of copper.
Mark best answer

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2 years ago