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4 years ago

How is steel made from iron??

1 answer:

8 0

<span>Iron is mined from the earth. In its raw form it is unrefined, not pure iron. The way to remove the iron is with heat in a process called smelting. There are three ways to process the iron into a usable form. One of them is to make steel. This is the most refined metal that can be made from iron. Most of the impurities are removed from the iron and it becomes a much stronger metal. </span>

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Help me please i need it for homework i cant seen to solve the answer :((

strojnjashka [21]

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7 0

3 years ago

Answer ASAP Please this is a timed test

DiKsa [7]

you want to design a faster car

because thats engineering

○○○

testing evaporation is not engineering

and making slime isnt either...

lets say it like this do you use a wrench for slime or evaporation?

nope but you do for cars

♥

7 0

3 years ago

a balloon contains 0.950 of nitrogen gas at a volume of 25.5 L. How many grams of N2 should be released from the balloon to brin

son4ous [18]

Answer:

4.27 g

Explanation:

We can write that for a gas kept at constant pressure and temperature, the number of moles of the gas is directly proportional to its volume:

$n\propto V$

Which can be rewritten as

$\frac{n_1}{V_1}=\frac{n_2}{V_2}$

where here we have:

$n_1=0.950 mol$ is the initial number of moles

$V_1=25.5 L$ is the initial volume of the gas

$V_2=17.3 L$ is the final volume of the gas

So the final number of moles is

$n_2=\frac{n_1 V_2}{V_1}=\frac{(0.950)(17.3)}{25.5}=0.645 mol$

So the number of moles that should be released from the balloon is:

$\Delta n = n_1-n_2=0.950-0.645=0.305 mol$

The molar mass of gas N2 is

$M=14 g/mol$

Therefore, the mass of gas that should be released is:

$\Delta m = M\Delta n =(14.0)(0.305)=4.27 g$

4 0

4 years ago

Which type of relationship exists between Alaskan brown bears and salmon? A. predation B. mutualism C. competition D. commensali

aksik [14]

Answer:

A. predation.

Explanation:

Predation is a type of ecological interaction in which one organism which is known as predator feeds upon another organism thereby killing it. The organism which is killed by predator is known as prey. In such interaction one organism is benefited while another one is harmed.

Brown bears of Alaska feed upon salmon. In order to so they have developed many ways which include waiting at the bottom of falls from where salmons pass by or standing at the bottom of the falls.

3 0

4 years ago

0.785 moles of N2,fill a balloon at 1.5 atm and 301 K.<br> What is the volume of the balloon?

Tcecarenko [31]

Answer:

V = 12.93 L

Explanation:

Given data:

Number of moles = 0.785 mol

Pressure of balloon = 1.5 atm

Temperature = 301 K

Volume of balloon = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K

T = temperature in kelvin

Now we will put the values.

V = nRT/P

V = 0.785 mol × 0.0821 atm.L/ mol.K × 301 K / 1.5 atm

V = 19.4 L /1.5

V = 12.93 L

7 0

3 years ago