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3 years ago

True or false? Steel is a chemical element.

Chemistry

2 answers:

Irina-Kira [14]3 years ago

8 0

I think answer is false

dem82 [27]3 years ago

3 0

Steel is a blend of iron and carbon combined with at least one different metals or nonmetals. Since steel is a blend instead of a substance compound, steel does not have a set synthetic compound recipe. The naming tradition for steel relies on the steel's piece—what is blended in with the iron, for example, carbon steel or tungsten steel.

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The molar mass of water is 18.0 grams per mole. What is the mass of 9.00 moles of water?

Tju [1.3M]

Answer:

162 grams

Explanation:

To find the mass from molar mass and moles, you simply multiply.

You get (18.0g)x(9.00 moles)

3 0

3 years ago

how many liters of radon gas would be in 3.43 moles at standard temperature and pressure (273K and 100 kPa)?

bagirrra123 [75]

Answer:

V = 0.0007678398L

Explanation:

Given parameters:

Number of moles of gas = 3.43moles

Temperature = 273k

pressure = 100kPa = 100000Pa

Unknown:

Volume of gas = ?

Solution

The gas is at standard temperature and pressure, this implies we can use the ideal gas equation to solve for the unknown.

Mathematically, the law is expressed as:

PV = nRT

The unknown here is the Volume, V. We know the other parameters.

P = pressure on the gas

n = number of moles

R = gas constant=0.082

T = temperature

now, we have to make V the subject of the expression:

V = $\frac{nRT}{P}$

V = $\frac{3.43 x 0.082 x 273}{100000}$

V = 0.0007678398L

8 0

3 years ago

Alcohols always contain __________ groups.

siniylev [52]

Alcohols always contain the Hydroxyl functional group (-O H) - (or just hydroxyl group), which is an oxygen atom bound by a covalent (with shared electron pairs) bound to a hydrogen atom.

5 0

3 years ago

Is concrete a compound

zalisa [80]

Concrete is not a compound

7 0

4 years ago

A 2.50 L solution contains 5.00 g of NaOH, which has a molecular weight of 40.00

Fantom [35]

Answer:

0.313mol/L

Explanation:

$\frac{5.00}{40.00} \times 2.50 = 0.3125$

3 0

3 years ago