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2 years ago

7

Why do some metals react with only steam?

2 answers:

Gnoma [55]2 years ago

7 0

Answer:

Metals which react with steam form the solid metal oxide and hydrogen gas.

In general, the more reactive the metal, the more rapid the reaction. Aluminium is unusual, because it is a reactive metal that does not react with water. Its surface forms a protective layer of aluminium oxide that keeps water away from the metal below.

The apparatus used to react a metal with steam and collect the gas produced is shown below.

Andrews [41]2 years ago

3 0

Answer:

This is because some metals like aluminium, zinc, iron do not react with hot/cold water ; they react only with steam to form a metal oxide and hydrogen.

Step-by-step explanation:

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The amount of chlorine in a swimming pool is proportional to the volume of water. The pool has 2.5 milligrams of chlorine per li

stira [4]

Answer:

There are <u>20,000 milligrams</u> chlorine in the pool.

Step-by-step explanation:

Given:

The chlorine per liter of water in the pool is 2.5 milligrams.

The volume of water in the swimming pool is 8000 gallons.

Now, to find the quantity of chlorine in the pool.

Let the quantity of chlorine be $x.$

The gallons of water in the swimming pool = 8000.

The milligrams of chlorine per liter of water in the pool = 2.5.

According to question, the amount of chlorine in the swimming pool is proportional to the volume of water.

So, 2.5 mg of chlorine is equivalent to 1 liter.

Thus, $x$ is equivalent to $8000.$

Now, to get the quantity of chlorine by using cross multiplication method:

$\frac{2.5}{1} =\frac{x}{8000}$

<em>By cross multiplying we get:</em>

$20000=x\\\\x=20,000\ mg.$

Therefore, there are 20,000 milligram chlorine in the pool.

6 0

2 years ago

Andrew has already played 32 minutes on his video game this morning and wants to play an additional 15 minutes on each of x game

belka [17]

Given :

Andrew has already played 32 minutes on his video game this morning and wants to play an additional 15 minutes on each of x games after school today.

To Find :

Which equation can be used to find y, the total minutes Andrew will play video games today.

Solution :

Number of minutes he play after school time, n = 15x .

Number of minutes already played, c = 32 .

So, total number of minutes he play games for today is :

y = n + c

y = 15x + 32

Therefore, equation which is useful to find number of minutes video game played per day is y = 15x + 32 .

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2 years ago

Marcy has 567 earmuffs in stock if she can put 18 earmuffs on each shelf, about how many shelves does she need for all of the ea

Nitella [24]

It would be: 567/18 = 31.5

So, she needs atleast 32 shelves....

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2 years ago

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The larger of two numbers is seven less than three times the smaller number. If the sum is 61, find the numbers.

swat32

Answer:

17 and 44

Step-by-step explanation:

Let S = smaller number, then L = the larger = 3S - 7

The sum = 3S - 7 + S = 4S - 7 = 61

4S = 68

S = 17 and L = 44

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2 years ago

Which of the following could be the lengths of the three sides of a triangle?

OverLord2011 [107]

its b

Step-by-step explanation:

cuz to sides are the exact same then one side is bigger than the others :)

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2 years ago

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