Which one of these is an element carbon carbon dioxide air water

Answers

Answer 1

Answer: carbon is an element.
Carbon dioxide is a compound
air is a mixture
water can be both a compound/mixture depending on the type

Hardness, lustre, and colour.

Explanation:

These Rocks shown in photographs are made of different types of minerals which have properties as follows:

●The color of the rock is grey, brown and yellow after it is ground into a powder its color is streak.

● The lustre of the rock tells how shiny the rocks are.

● Other properties include hardness, texture, shape, and size.

I need help with Number 63

Answers

Isotopes are variants of an element which have differing number of neutrons. So, yes, because all of them have the same atomic number, meaning they are all Mg, however they all have differing atomic masses meaning different number of neutrons.

Convert 30.0 cm to meters

Answers

Answer:

your answer would be 0.3 meters

To get the meter you have to divide the length 30 value by 100

which will give you 0.3.

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When the vapor pressure of a liquid equals the pressure on its surface the liquid will be

Answers

Answer:

The gas above it or boiling

Explanation:

The gas above it or boiling

Give an example of how satellites are used for communication?

Answers

Satellites are use in many different ways such as gps and to carry data. One of the many implementation is scintillate television and Internet access.

Which of these statements explains the relationship among elements, compounds, and mixtures? A. Elements are made of compounds and mixtures. B. Both compounds and mixtures are made up of elements. C. Mixtures are made of elements, and elements are made of compounds. D. Compounds are made of mixtures, and mixtures are made of elements.