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3 years ago

Explain what might happen to tundra animals, such as polar bears, as earth's climate warms. pls explain

Chemistry

1 answer:

SCORPION-xisa [38]3 years ago

8 0

Answer:

They will die.

Explanation:

Polar Bears were made to live in the frigid temperatures of the tundras. If there is a temperature change it can affect their habitat. It can destroy it and they would have to move out to another place. They can die due to global warming.

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Charge on monatomic ions: a) I b) Sr c) K d) N e) S f) In

wlad13 [49]

A) I = -1, B) Sr = +2, C) K = +1, D) N = -3, E) S = -2, F) In = +3

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3 years ago

Len [333]

A.) AlO is the correct formula

8 0

3 years ago

At 1.00 atm and 0 ∘ C, a 5.04 L mixture of methane ( CH 4 ) and propane ( C 3 H 8 ) was burned, producing 15.0 g CO 2 . What was

diamong [38]

Answer : The mole fraction of methane and propane is, 0.742 and 0.26

Explanation :

First we have to calculate the moles of mixture by using ideal gas equation.

PV = nRT

where,

P = pressure of the mixture = 1.00 atm

V = Volume of the mixture = 5.04 L

T = Temperature of the mixture = $0^oC=[0+273]K=273K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of mixture = ?

Putting values in above equation, we get:

$1.00atm\times 5.04L=n_{mix}\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 273K\\n_{mix}=\frac{1.00\times 5.04}{0.0821\times 273}=0.225mol$

Let the number of moles of methane be 'x' moles and that of propane be 'y' moles

So, $x+y=0.225$ .....(1)

The chemical equation for the combustion of methane follows:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

By Stoichiometry of the reaction:

1 mole of methane produces 1 mole of carbon dioxide

So, 'x' moles of methane will produce = $\frac{1}{1}\times x=x$ moles of carbon dioxide

The chemical equation for the combustion of propane follows:

$C_3H_8+5O_2\rightarrow 3CO_2+4H_2O$

By Stoichiometry of the reaction:

1 mole of propane produces 3 mole of carbon dioxide

So, 'y' moles of propane will produce = $\frac{1}{1}\times y=y$ moles of carbon dioxide

Now we have to calculate the mass of carbon dioxide.

Total moles of carbon dioxide = (x + 3y)

Mass of carbon dioxide = (Total moles) × (Molar mass of carbon dioxide)

Molar mass of carbon dioxide = 44 g/mol

Mass of carbon dioxide = $(x+3y)\times 44$

As we are given:

Mass of carbon dioxide = 15.0 g

So, $44(x+3y)=15.0$ .....(2)

Putting value of 'x' from equation 1, in equation 2, we get:

$44(0.225-y+3y)=15.0\\\\0.225+2y=0.341\\\\y=0.058$

Evaluating value of 'x' from equation 1, we get:

$x+0.058=0.225\\x=0.167$

Mole fraction of a substance is given by:

$\chi_A=\frac{n_A}{n_A+n_B}$

For Methane:

$\chi_A=\frac{n_A}{n_A+n_B}$

Moles of methane = 0.167 moles

Total moles = 0.225

Putting values in above equation, we get:

$\chi_{(Methane)}=\frac{0.167}{0.225}=0.742$

For Propane:

Moles of propane = 0.058 moles

Total moles = 0.225

Putting values in above equation, we get:

$\chi_{(Propane)}=\frac{0.058}{0.225}=0.26$

Hence, the mole fraction of methane and propane is, 0.742 and 0.26

6 0

4 years ago

Do you think changing your habits can make a big impact on Earth? Why or why not

Andre45 [30]

Answer:

yes if you ride a bike rather than driving a car so much or also using less plastic and all of this will leave a smaller carbon footprint

Explanation:

4 0

3 years ago

Read 2 more answers

During the process of heat transfer, the heat transferred to or from a system's surroundings is always?

OleMash [197]

Answer:

During the process of heat transfer, the heat transferred to or from a system's surroundings is always equal in magnitude to the heat transferred to or from the system, but opposite in sign.

<h2>What is the 1st law of thermodynamics?</h2>

The total energy of an isolated system is said to stay constant according to the first rule of thermodynamics. Energy cannot be generated or destroyed, but it may be transformed from one form into another inside a closed system, which is known as the conservation of energy.

This rule states that when a system is exposed to a certain amount of heat, the amount of heat that the system absorbs is equal to the product of the increase in internal energy (change in internal energy) of the system and the external work that the system does. The relationship between a system's internal energy and work output and the heat given to it is demonstrated by the first law of thermodynamics. This equation provides the foundation for the majority of practical innovations like heat engines, freezers, and air conditioners.

The equation for the first law of thermodynamics is given as; ΔU = q + W

Where,

ΔU = change in internal energy of the system.
q = algebraic sum of heat transfer between system and surroundings.

W = work interaction of the system with its surroundings.

The heat transported to or from a system's surroundings during the process of heat transfer is always opposite in sign, but equal in size, to the heat transferred to or from the system.

What is heat transfer?

The flow of thermal energy between physical systems is known as heat transfer. The temperatures of the systems and the characteristics of the medium used to transmit the heat affect how quickly it transfers. Conduction, convection, and radiation are the three basic ways that heat is transferred. It is crucial to employ heat transfer, or the movement of energy in the form of heat, in applications of the First Law of Thermodynamics since it is a mechanism through which a system changes its internal energy. Diffusion and conduction are two different concepts. Diffusion linked to fluid mixing is not the same as conduction.

The Second Law of Thermodynamics controls the direction of heat transmission, which is from one area of high temperature to another area of lower temperature. The internal energy of the systems from and to which the energy is transmitted is altered during heat transfer. Heat transfer will take place in a way that makes the group of systems' entropy higher.

In physics, heat is described as the flow of thermal energy over a boundary that is clearly defined surrounding a thermodynamic system. The amount of work that a thermodynamic system may accomplish is known as the thermodynamic free energy. Enthalpy is a thermodynamic potential with the letter "H" that is made up of the system's internal energy (U) plus the volumetric product of pressure (P) and temperature (T) (V). A joule is a unit used to measure energy, effort, or heat production.

The quantity of heat transmitted in a thermodynamic process that modifies a system's state relies on how that process happens, not just the net difference between the process' beginning and ending states, since heat transfer is a process function (or route function), as opposed to a function of state.

The heat transfer coefficient, which represents the relationship between the heat flux and the thermodynamic force that drives the flow of heat, is used to determine both thermodynamic and mechanical heat transfer. A quantitative, vectorial description of the movement of heat through a surface is called a heat flux.

The term "heat" is sometimes used interchangeably with "thermal energy" in technical applications. This usage derives from the historical understanding of heat as a fluid (caloric) that may be transported by a variety of reasons, which is also prevalent in laypeople's language and daily life.

Thank you,

Eddie

8 0

2 years ago