Explain why stainless steel, sea water, and air are all considered solutions

Answers

Answer 1

Answer:

Answer:

They are composed by two or more pure substances.

Explanation:

Hello,

At first, we must take into account that mixtures are such materials made up of two or mire pure substances, say elements, molecules or compounds. They are classified as homogeneous for which there is no appreciable difference upon its constituents and as heterogeneous for which the constituents are differentiable. Now, stainless steel is considered as a mixture as long as it is mainly composed by iron and carbon and some other metallic elements such as chromium. Sea water is another interesting example, since the main constituents are water and sodium chloride, nonetheless, other ions such as iodide, sulfate, magnesium (II), potassium (I), calcium (II) are also found into it. Finally, the air is a mixture due to the presence of oxygen and nitrogen as the major constituents, considering others such as carbon dioxide, methane (pollution), argon, hydrogen as traces, it means, compositions below the 1%.

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Answer 2

Answer:
Think of a homogeneous mixture similar to salt water. Homogeneous mixtures have a fixed, or uniform composition. This means that each part of the mixture has the same properties. Every part of the sample is identical to the next. The same thing would happen with steel and bronze, they too are uniform throughout.

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Which instrument is directly used to determine the relative masses of atoms? (A) spectroscope
(B)Geiger counter
(C)mass spectrograph
(D)microbalance
(E)electron microscope

Answers

Mass spectrograph is an instrument which is used to determine the relative masses of atoms.

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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It's C ^^ she's right

If 25% of a radioactive element remains after 1,000 years, what is the half-life?

Answers

Half life of the given radioactive substance after 1000 years is 500 years.

What is half life?

Half -life of a substance is defined as the time which is required for half of the quantity of a radioactive substance to get decayed.It is a term which is used in nuclear chemistry for describing how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the time which is required for number of disintegrations per second of radioactive material to decrease by one half of its initial value.

For the given problem, T=1000 years and N=25% of N°

where T=time period , N=amount of quantity after decay ,N°= initial quantity.

Here,N=25% of N°

N=25/100 N°=N°/4

N°/4=N°/2 $^n$

n=2

∵nt $_1/2$ =T

So. 2t $_1/2$ =1000

t $_1/2$ =500 years.

Hence, the half-life of a substance is 500 years.

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The half-life would be 500 years.

25% means that 2 half-lives have already passed. So one half-life is 500 years.

What are two elements that form a large number of bonds and that both have similar properties to carbon?

Answers

Silicon and Germanium. You can conclude it from its position in the periodic table. Silicon and Germanium are in the same group of the Carbon. That implies that all three have the same number of electrons in the outer orbital, which is responsible for the bonds.

Trisha is learning how to do a first-aid procedure known as CPR. She is practicing using a mannequin, or a model of the top half of the human body.What is one limitation of a CPR mannequin?
A.
It is not possible to press down on the chest of a CPR mannequin.
B.
It is not possible to breathe into the mouth a CPR mannequin.
C.
It is not possible to check for a real pulse on a CPR mannequin.
D.
It is not possible to lay a CPR mannequin on the floor.

Answers

C is the answer 〰️I need more characters Oop

Answer: The answer is C cause a CPR doll can do the rest

Explanation: pls mark as brainliest

What is the ratio of Al ions to S ions in a neutral compound?

Answers

Aluminum ions are usually +3 while sulfide ions are usually -2 which means that a neutral compound of aluminum sulfide would be Al₂S₃. 3×2=6 while -2×3=-6 and 6+-6=0.

I hope this helps. Let me know if anything is unclear.

Trends in the periodic table indicate that the element with the greatest ionization energy is in which of the following periods and groups?a
Period 2, Group 1
b
Period 7, Group 2
c
Period 6, Group 17
d
Period 1, Group 18

Answers

Answer:

D Period 1, Group 18

Explanation:

it's helium

it's top right corner of the periodic table

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