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Rudiy27
3 years ago
13

Calculate the area of a floor that is 1.5 × 103 m long and 2.2 × 102 m wide.

Chemistry
1 answer:
liubo4ka [24]3 years ago
8 0

Answer:

154.5+224.4=378.9m

Explanation:

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Write the equation, Aluminum metal reacts with oxygen gas to produce aluminum oxide solid.
Alenkasestr [34]
The equation is:4Al+3O2----2Al2O3
8 0
3 years ago
How much heat is absorbed when 447 g of water , Cp = 4.184 J/goC, goes from 25.0 oC to 35.0 oC?
Digiron [165]

Answer:

The answer to your question is  Q = 18702.5 J

Explanation:

Data

mass of water = m = 447 g

Cp = 4.184 J/g°C

Temperature 1 = T1 = 25°C

Temperature 2 = T2 = 35°C

Heat = Q = ? Joules

Process

1.- Write the formula to calculate heat

    Q = mCp(T2 - T1)

2.- Substitution

    Q = (447)(4.184)(35 - 25)

3.- Simplification

    Q = (447)(4.184)(10)

4.- Result

    Q = 18702.5 J

8 0
3 years ago
Which of the following statements describes the correct method of preparation of 1.00 L of a 2.0 M urea solution?
Zolol [24]

Answer:

To prepare 1.00 L of 2.0 M urea solution, we need to dissolve 120 g of urea in enough water to produce a total of 1.00 L solution

Explanation:

Molarity of a solute in a solution denotes number of moles of solute dissolved in 1 L of solution.

So, moles of urea in 1.00 L of a 2.0 M urea solution = 2 moles

We know, number of moles of a compound is the ratio of mass to molar mass of that compound.

So, mass of  2 moles of urea = (2\times 60.06)g=120 g

Therefore to prepare 1.00 L of 2.0 M urea solution, we need to dissolve 120 g of urea in enough water to produce a total of 1.00 L solution

So, option (C) is correct.

8 0
3 years ago
What are the properties of a bandaid
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3 years ago
Is neutralizing a base, physical or chemical property?
DIA [1.3K]
Physical property

Have a nice day!
8 0
3 years ago
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