The reaction in which methane is burned, CH4 +202 --> 2H20 + CO2, is an example of a
combustion reaction
O synthesis reaction
O decomposition reaction
O precipitate reaction

Alkanes are saturated hydrocarbons that have single bonds in chains

General formula for alkanes :

[tex]\tt \large{\bold{C_nH_{2n+2}}[/tex]

Hydrocarbon combustion reactions (specifically alkanes)

[tex]\large {\box {\bold{C_nH _ (_2_n _ + _ 2_) + \dfrac {3n + 1} {2} O_2 \Rightarrow nCO_2 + (n + 1) H_2O}}}[/tex]

So that the burning of ethane with air (oxygen):

[tex]\tt C_2H_6+\dfrac{7}{2}O_2\rightarrow 2CO_2+3H_2O[/tex]

2C₂H₆ (g) + 7O₂ (g) ⟶ 4CO₂ (g) + 6H₂O (ℓ)

or we can use mathematical equations to solve equilibrium chemical equations by giving the coefficients for each compound involved in the reaction

C₂H₆ (g) + aO₂ (g) ⟶ bCO₂ (g) + cH₂O (ℓ)

C : left 2, right b ⇒ b=2

H: left 6, right 2c⇒ 2c=6⇒ c= 3

O : left 2a, right 2b+c⇒ 2a=2b+c⇒2a=2.2+3⇒2a=7⇒a=7/2

Answer:

After the reaction, the total mass of the products must be D. Less than 10.0 grams

Answer:

WHY DO YOU NEED HELP HUH

DON'T CHEAT READ AND STUDY

Explanation:

Answer:

It's C

Explanation:

The volume of cylinder = 7.948 cm³

Further explanation

Volume is a derivative quantity derived from the length of the principal

The unit of volume can be expressed in liters or milliliters or cubic meters

The volume of the aquarium is almost the same as the beam namely:

V = length x width x height

The volume of a cylinder can be formulated :

[tex]\tt V=\pi.r^2.h[/tex]

r = radius

h = height

Diameter of cylinder = 1.25 cm

radius=r :

[tex]\tt \dfrac{1.25}{2}=0.625~cm[/tex]

[tex]\tt V=\pi\times 0.625^2\times 6.48\\\\V=\boxed{\bold{7.948~cm^3}}[/tex]

Answer:

Differences in temperature cause differences in air density. Warmer air is less dense than cold, which is why warm air tends to rise and cold air sinks.

temparature affects particles. warm particles are more spread out.

Explanation:

. Being acted on by gravity, colder, denser air weighs more and exerts greater pressure per unit area.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 324 g

volume = 40.8 cm³

We have

[tex]density = \frac{324}{40.8} \\ = 7.941176...[/tex]

We have the final answer as

Hope this helps you

Answer:

freckles.........

You can inherit freckles from your family but you cant inherit hair length, physical fitness, or scars due to the fact you can cut your hair any length.You can gain scars from any wound. whereas Physical fitness comes from how healthy you are to perform aspects of sports, occupations and daily activities.  

Answer:

Freckles

Explanation:

Because everything else is specific to a person. And these things are ones own personality and not born with.

Answer:

A smallest particle of an element that can take part in a chemical reaction is called an atom.

Explanation:

E=x +c - D Emonety to explain the functionally full process of work and C3

Answer: The Equation:

Iron + oxygen → iron oxide

2Fe(s) + 3/2 O2(g) → Fe2O3(s)

Explanation:

Answer: +3

Explanation: Gallium liquefies just above room temperature. Gallium is a soft solid, however it quickly becomes liquid when heated.

Answer:

chemical equation balance.

Explanation:

if you need more explanation , comment.

Answer:

...

Explanation:

Answer:

p = 43, n = 57, e = 40

Explanation:

Z is the number of protons. The number of neutrons, subtract Z from the isotope number (100). To begin with, protons and electrons are equal in an atom, but this atom lost three, so subtract 3 from Z.

Z= # of protons = 43

100 - 43 = 57 neutrons

43 - 3 = 40 electrons.

Answer:

all

of them

Explanation:

Answer:

I think it's 1, but if that's wrong I'm really sorry

Answer:

A variable in an experiment which is held constant in order to assess the relationship between multiple variables, is a control variable.

Explanation:

Answer:

i believe its A

so sorry if i got it wrong

Explanation:

Answer:

2.48626 x 10^24

Explanation:

We multiple 4.13 by avogadro's number to get that.

Answer:

KF

Explanation:

Potassium = K

Fluoride = F

[tex]K^{+1}F^{-1}K_{1} F_{1}=KF[/tex]

Answer:

KF is your answer. Can I get Brainliest

Answer:

Explanation:

In order to find the new volume we use the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

We have

[tex]V_2 = \frac{10 \times 2}{4} = \frac{20}{4} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

line m is vertical line with an undefined slopel line correct answer is 6 8 10 12 x

Answer:

O microwaves, radio waves, infrared light

Explanation:

Answer: C.  microwaves, radio waves, infrared light

Explanation: C. Microwaves, Radio Waves, Infrared light

Answer:

Yes.

Explanation:

The expression are easy and clear to understand when a person expresses his inner state. The expression are a natural reaction which a person demonstrates and mostly these expressions are instant and unintended.

Answer:

3 g/mL

Explanation:

Density is mass divided by volume (g/mL).

Mass of rock = 12.5

Volume of rock = 24-20 = 4mL

Density of rock = 12.5g/ 4mL = 3.125 g/mL

Round to the lowest number of significant figures which is 1 to get 3 g/mL

KE = 0

Energy is the ability to do work  

Energy because its motion is expressed as Kinetic energy (KE) which can be formulated as:  

[tex]\large{\boxed{\bold{KE=\frac{1}{2}mv^2}}}[/tex]

So for two objects that have the same speed, the greater the mass of the object, the greater the kinetic energy  

The stone in hand is in a motionless state (at rest) so that its velocity (v) = 0, so it has no kinetic energy

But this stone can have potential energy that is gained due to its height

Answer:

the answer is metal  hope it helps

Explanation:

Answer:

The boiling point increases with increased pressure up to the critical point, where the gas and liquid properties become identical.

Answer:

The purpose of using a chemical equation is to keep track of elements and the number of atoms of each of the elements on each side of the equation. ... They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out.

Answer:

:0

Explanation:

Sample Response: Chemical equations show how chemicals interact when a reaction occurs. They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out. They also help keep track of all elements and the number of atoms of each element on each side of the equation.

Answer:

0.5×10² pm

Explanation:

Given data:

Frequency of x-ray = 6×10¹⁸ Hz

Wavelength of x-ray = ?

Solution:

Wavelength is designated as "λ" and it is the measured in meter. It is the distance between the two crust of two trough.

Formula:

speed of wave = wavelength × frequency

speed = 3×10⁸ m/s

now we will put the values in formula.

3×10⁸ m/s = λ  × 6×10¹⁸ Hz

Hz = s⁻¹

λ  = 3×10⁸ m/s / 6×10¹⁸ s⁻¹

λ  = 0.5×10⁻¹⁰ m

m to pm

0.5×10⁻¹⁰ m × 10¹² pm/1m

0.5×10² pm