2 years ago

Which of the following materials is a substance, silver, air ,gasoline or staintless steel?

Chemistry

1 answer:

Irina-Kira [14]2 years ago

4 0

Silver is the only substance!

You might be interested in

Fireworks, KNO3<br> Give only the names of the elements alphabetically, separating them with commas.

Alborosie

Answer : The question is to write the elements alphabetically and seperating them with commas.

So in this case for your question of Fireworks , K $NO_{3}$ ,

The answer will be K, N, O.

You have to just differentiate the elements and write them according to the alphabetical order.

4 0

3 years ago

Read 2 more answers

Dima020 [189]

The correct answer is b hope this helps air

5 0

2 years ago

How many moles of oxygen molecules are present in 112ml of co2 at NTP?

dexar [7]

In each mole of carbon dioxide there will be one mole of O₂.

Let us calculate the moles of carbon dioxide gas present first

The conditions are NTP it means , Temperature = 293 K and P = 1 atm

We will use ideal gas equation

PV= nRT

Where

P = Pressure of gas = 1 atm

V= 112mL=0.112L

R= gas constant =0.0821 L atm /mol K

n = moles = ?

Putting values

$moles=\frac{PV}{RT}=\frac{1X0.112}{0.0821X293}$

moles = 0.00466

Thus moles of carbon dioxide will be 0.00466

The moles of O₂ = 0.00466

7 0

2 years ago

Groups of cells that work together are called .

Phantasy [73]

Group of tissues form a cell , and a group of cells form an organ

8 0

2 years ago

Which substance has Delta.Hf defined as 0 kJ/mol?

miskamm [114]

Answer:

the answer is 02 (g)

Explanation:

hope this helps :)

6 0

2 years ago