Why are milk powder tins and salmon tins coated with tin (Sn) metal? Give reasons based on the reactivity series of the metals.Urgent!!

Answers

Answer 1

Answer: the tin in reactivity arrangement implies more receptive than tin and can respond with food components protected in it

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A sample of matter must be copper if(1) each atom in the sample has 29 protons(2) atoms in the sample react with oxygen(3) the sample melts at 1768 K(4) the sample can conduct electricity
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A solution has the 23.22% mass/volume of a particular solvent what is the mass of solute dissolved in 2.5 liter of solvent?

Answers

23.22%:

2.5 L in mL : 2.5 * 1000 = 2500 mL

23.22 g ----------- 100 mL
? g ------------- 2500 mL

m = 2500 * 23.22 / 100

m = 58050 / 100

m = 580,5 g

An ongoing series of fission reactions is called an

Answers

A chain of reaction (can easily get out of control)

"A sphere of radius 0.50 m, temperature 27oC, and emissivity 0.85 is located in an environment of temperature 77oC. What is the net flow of energy transferred to the environment in 1 second?"

Answers

Explanation:

It is known that formula for area of a sphere is as follows.

A = $4 \pi r^(2)$

= $4 * 3.14 * (0.50 m)^(2)$

= 3.14 $m^(2)$

$T_(a)$ = (27 + 273.15) K = 300.15 K

T = (77 + 273.15) K = 350.15 K

Formula to calculate the net charge is as follows.

Q = $esA(T^(4) - T^(4)_(a))$

where, e = emissivity = 0.85

s = stefan-boltzmann constant = $5.6703 * 10^(-8) Wm^(-2) K^(-4)$

A = surface area

Hence, putting the given values into the above formula as follows.

Q = $esA(T^(4) - T^(4)_(a))$

= $0.85 * 5.6703 * 10^(-8) Wm^(-2) K^(-4) * 3.14 * ((350.15)^(4) - (300.15)^(4))$

= 1046.63 W

Therefore, we can conclude that the net flow of energy transferred to the environment in 1 second is 1046.63 W.

Which low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume?

Answers

Solid is the low energy state of condensed matter is characterized by structural rigidity

Final answer:

The low-energy state of condensed matter characterized by structural rigidity and resistance to shape or volume changes is the solid state. This is due to its atomic structure, where molecules are organized in a rigid lattice, allowing the solid to maintain its shape and resist deformation.

Explanation:

The low-energy state of condensed matter that is characterized by structural rigidity and resistance to changes of shape or volume is defined as a solid. Going back to its atomic structure, atoms in a solid are in close contact and the forces between them allow the atoms to vibrate but not to change positions with neighbouring atoms. Basically, this atomic regulation in a solid form leads to its characteristic rigidity and resistance to shape or volume alterations.

Molecules in a solid, unlike in a liquid or gas, are organized into a lattice formation and retain this pattern despite external forces. This allows the solid state to resist deformation, maintain its shape, and have fairly constant volume. The ability of solids to resist compression is also due to their lattice structure, where atoms are at a relatively fixed distance apart, and under compression, the atoms would be forced into one another.

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Which type of organism helps return nutrients from dead plants and animals to the soil. A producer. B prey. C predator. D decomposer

Answers

The answer is D. Decomposer

The answer is 'decomposer.'

The pH level of tomato juice is 4.2. What is the hydrogen-ion concentration [H+] for tomato juice?A. 0.0004 B. 0.0006 C. 0.00004 D. 0.00006

Answers

The pH of a solution is related to the hydrogen ion concentration in a logarithmic function which is expressed as:

pH = -log[H+]

4.2 = - log [H+]
[H+] = 6.31 x 10^-5 M

Therefore, the correct answer from the choices listed above is option D, 0.00006 M.

pH = 4.2

[H+] = 10 ^- pH

[H+] = 10 ^- 4.2

[H+] = 0.00006 M

Answer D

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