1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Serjik [45]
3 years ago
15

5. Identify each of the following as an element, a mixture, or a compound.

Chemistry
1 answer:
VashaNatasha [74]3 years ago
4 0

Answer:

Aluminum foil ~ element

Air ~ mixture

Water ~ compound

Salt Water ~ mixture

Copper Wire ~ element

Steel ~ element

You might be interested in
How much heat is required to warm 1.50L of water from 25.0C to 100.0C? (Assume a density of 1.0g/mL for the water.)
Masteriza [31]

<u>Answer:</u> The amount of heat required to warm given amount of water is 470.9 kJ

<u>Explanation:</u>

To calculate the mass of water, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of water = 1 g/mL

Volume of water = 1.50 L = 1500 mL    (Conversion factor:  1 L = 1000 mL)

Putting values in above equation, we get:

1g/mL=\frac{\text{Mass of water}}{1500mL}\\\\\text{Mass of water}=(1g/mL\times 1500mL)=1500g

To calculate the heat absorbed by the water, we use the equation:

q=mc\Delta T

where,

q = heat absorbed

m = mass of water = 1500 g

c = heat capacity of water = 4.186 J/g°C

\Delta T = change in temperature = T_2-T_1=(100-25)^oC=75^oC

Putting values in above equation, we get:

q=1500g\times 4.186J/g^oC\times 75^oC=470925J=470.9kJ

Hence, the amount of heat required to warm given amount of water is 470.9 kJ

6 0
3 years ago
Which group is the most reactive?
RideAnS [48]

Answer:

alkali metals- Group 1

Explanation:

they have less valence electrons and therefore are more reactive

8 0
3 years ago
How many moles is 2.55 x 10 to the power of 26 atoms of Neon?​
Yakvenalex [24]

Answer:

424 mol

Explanation:

Step 1: Given data

Number of atoms of Neon: 2.55 × 10²⁶ atoms

Step 2: Calculate the number of moles corresponding to 2.55 × 10²⁶ atoms of Neon

In order to convert atoms into moles, we need a conversion factor, which is Avogadro's number: there are 6.02 × 10²³ atoms of Neon in 1 mole of atoms of Neon.

2.55 × 10²⁶ atoms × (1 mol/6.02 × 10²³ atoms) = 424 mol

4 0
4 years ago
What is the number of cations is present in 1.17 g of sodium chloride? Given Na=6*10power 23 mol
natita [175]
1.17×6×1023 Wich equals 7.02×1023 Your final answer is 7.02×1023
5 0
3 years ago
Read 2 more answers
What’s the difference between 2o and o(subscript 2)?
tatuchka [14]

Answer:

2O is an atom while O2 Is a molecule

5 0
3 years ago
Other questions:
  • What happens when the amoeba proteus is placed in distilled water?
    15·1 answer
  • What compound is formed when methyloxirane (1,2-epoxypropane) is reacted with ethylmagnesium bromide followed by treatment with
    14·1 answer
  • Which weighs more 10g of iron or 10g of water
    11·2 answers
  • Whereas sodium is found mainly in the extracellular fluid, most ________ is found in the intracellular fluid.A) ironB) chlorideC
    8·1 answer
  • What is the molar mass of pure nitrogen gas? (*diatomic element) ?????
    9·1 answer
  • Why are vitamins and minerals are not classified as a food?
    7·1 answer
  • Describe 2 physical changes that could occur with a piece of paper
    10·2 answers
  • Which of the following observations indicates that atoms of all elements contain small, negatively charged particles?
    6·1 answer
  • 4NH3+5O2-4NO+6H2O<br>how many moles of NH3 must react to produce 5.0 moles of NO?​
    15·1 answer
  • How many moles (of molecules or formula units) are in each sample?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!