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3 years ago

Describe the structure of an atom.

Chemistry

1 answer:

pochemuha3 years ago

5 0

The answer would be A

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A balloon is filled to a volume of 1.6 L at 278 K. The balloon is left outside overnight and the temperature has dropped to 253

german

Explanation:

Charles' law gives the relationship between the volume and the temperature of the gas. Mathematically,

Volume ∝ Temperature

i.e. $\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}$

We have, V₁ = 1.6 L, T₁ = 278 K, T₂ = 253, V₂=?

$V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{1.6\times 253}{278}\\\\V_2=1.45\ L$

So, the new volume is 1.45 L.

6 0

3 years ago

If the mass of a cube with a length of 9.0 cm3 is 12.2 g what is its density

Anvisha [2.4K]

Answer:

The density is 1,35 g/cm3

Explanation:

We use the formula for calculate the density

δ =m/V =12,2g / 9,0 cm3= 1,35 g/cm3

7 0

3 years ago

Read 2 more answers

Omg imgonnafailnfiedkla

Flura [38]

Answer:

Glucose and oxygen are required for cellular respiration. As the law of conversation states, in a biochemical reaction, mass is conserved. The mass of hydrogen in the glucose is therefore conserved in the water molecules products.

4 0

3 years ago

n a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the ________, while the antibonding

Kruka [31]

Answer:

In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the valence band, while the antibonding orbitals that are completely empty are referred to as the conduction band.

The conduction band occupies a higher energy level than the valence band. The band gap is what separates the two orbitals.

3 0

2 years ago

An environmental study of a certain metropolitan region indicates that given population x (in thousands), the average daily leve

Vedmedyk [2.9K]

Answer:

In 4 years the carbon monoxide level reach 7.8 parts per million.

Explanation:

The average daily level of carbon monoxide in the air is given by :

$c(x) = 0.5x + 2$ parts per million..[1]

The population of the region after t years is modeled by the formula :

$x(t) = 10 + 0.1t^2$ ...[2]

If level of carbon monoxide level reach 7.8 parts per million in t years.

Using [1] to calculate value of x.

c(x)= 7.8 parts per million

c(x) = 0.5x + 2 parts per million

7.8 parts per million = (0.5x + 2 ) parts per million

Solving for x , we get ;

x = 11.6

Using [2] to calculate value of t.:

x(t) = 11.6

$11.6 = 10 + 0.1t^2$

Solving for 't' we get ;

t = 4 years

In 4 years the carbon monoxide level reach 7.8 parts per million.

3 0

3 years ago