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Kamila [148]
3 years ago
6

An arctic weather balloon is filled with 34.1L of helium gas inside a prep shed. The temperature inside the shed is 5.°C. The b

alloon is then taken outside, where the temperature is â5.°C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1atm. Be sure your answer has the correct number of significant digits.
Chemistry
1 answer:
mart [117]3 years ago
6 0

Answer:

When the balloon is taken outside if the outside temperature is lower than the temperature inside the shed, the volume of the helium gas will decrease according to Charles' law. However, if the temperatureoutside is higher than inside the shed, the volume of the helium gas in the weather balloons will increase.

Note: The question is not complete. Assumptionshas been made about the temperature.

Explanation:

According to Charles' law of gases, the volume of a given mass of gas is directly proportional to its temperature in Kelvin provided its pressure remains constant.

Mathematically, V1T1 = V2T2

Given that the volume of the helium gas inside the weather balloon is 34.1 L at a temperature of 5 °C;

When the balloon is taken outside if the outside temperature is lower than the temperature inside the shed, the volume of the helium gas will decrease according to Charles' law. However, if the temperatureoutside is higher than inside the shed, the volume of the helium gas in the weather balloons will increase.

Assuming, the temperature outside the shed was 6.5 °C:

V1 = 34.1 L, T1 = 5.°C or 5.0 × 10^-10 °C = 273.1500000005

V2 = ?, T2 = 6.5 °C 6.5 × 10^-10 °C = 273.15000000065

V2 = V1T1/T2

V2 = (34.1 × 273.1500000005) / 273.15000000065

V2 = 34.1 L

Due the very small increase in temperature, the volume of the balloon increases only very slightly that is increase that it is negligible.

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Order the theories from oldest to most recent.
rjkz [21]

Answer:

Explanation:

The following are the order of point from oldest to most recent

1. Atoms are tiny indivisible particles that make up all mater.

it is Postulate of Dalton's atomic theory. this theory was put forward in 1803

2.  Negatively charged electrons are embedded in a mass of positive charge.

In 1897 J.J Thomson discovered that atom consist of tiny negatively charged particles called electrons that are uniformly spread in +vely charged matrix this model called as plum pudding model.

3. Atoms consist of mostly empty space with a dense nucleus of positive charge.

While doing experiment on gold foil Rutherford presented a model in 1909 and stated that atom consist mostly empty space with dense nucleus.

4. Electrons occupy specific energy levels surrounding a positively charged nucleus.

Niels Bohr in 1913 put forward a model to explain atomic orbitals/energy level. This is a postulate of Bohr model.

5. Electrons move about a positively charged nucleus in clouds that are defined by probabilities.

In 1926 Erwin Schrödinger explain the wave function of electrons and its probability.

5 0
3 years ago
300g de acido comercial se disuelve en agua destilada contenidos en un cono, cuyo radio es de 0.005Km y 300cm de altura, si la d
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Answer:

97.0%m/m es la concentración de la solución

Explanation:

El porcentaje masa/masa (%m/m) se define como 100 veces el radio entre la masa de soluto (300g de HCl) y la masa de la solución. Para hallar la masa de la solución debemos hallar la masa del agua (Solvente) haciendo uso de la ecuación del volumen de un cono. Con el volumen del cono podemos hallar la masa del agua haciendo uso de la densidad, así:

<em>Volumen:</em>

Volumen Cono = π*r²*h / 3

Donde r es el radio = 0.300m

h la altura = 5m

Volumen = π*(5m)²*0.300m / 3

7.85m³

<em>Masa Agua:</em>

7.85m³ * (1.2g / m³) = 9.42g Agua

<em>Masa solución:</em>

300g HCl + 9.42g Agua = 309.42g Solución

<em>%m/m:</em>

300g HCl  / 309.42g * 100 =

<h3>97.0%m/m es la concentración de la solución</h3>
8 0
3 years ago
If a climate scientist says, "The CO2 concentration in 2018 was 407.4 ppm." What<br> do they mean? *
Alinara [238K]

Answer:

Ppm <u>means the concentration of vapors or gases</u> expressed in parts per million of polluted air.

Explanation:

In Chemistry and Physics, part per million or PPM is a measure that expresses the number of units of a certain existing substance for every million units of the mixture. (Concentration)

In climate the equation is used so:

  • ppm = parts of polluted air / million parts of air .
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This is used to find the concentration of gases expressed as parts of gas per million parts of the

 polluted air.

In this case, it would be<u> 407.4L of CO2 per 10∧6L of air.</u>

6 0
3 years ago
Mary and her siblings share similar hair color. Which of these cell components are most involved in determining the hair color o
aksik [14]

The question is incomplete, the complete question is;

1. Mary and her siblings share similar hair color. Which of these cell components are most involved in determining the hair color of each sibling?

Gene, Chromosome, Nucleus

Cytoplasm, Chloroplasts,Genes

Vacuoles, Nucleus, Chromosomes

Chromosomes, Chloroplasts, Vacuoles

Answer:

Gene, Chromosome, Nucleus

Explanation:

Gene is defined in biology as "a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring" (Oxford Dictionary).

The gene is located in the chromosomes in the nucleus of cells. The sum total of the genes that an organism inherits from its parents is called the organisms' genotype and determines certain features of the organism.

The hair colour of Mary and each of her siblings depends on the genes they received from their parents.

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Harlamova29_29 [7]

Answer:

naturalistic

Explanation:

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