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mr Goodwill [35]
2 years ago
10

7. You should see a diagonal band from top left to bottom right across your graph. These are called "main sequence stars". Descr

ibe the general trend or relationship they show between temperature and brightness.
Chemistry
1 answer:
igor_vitrenko [27]2 years ago
8 0

Answer: mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

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Which of the following is NOT a compound?<br> Table salt<br> Carbon dioxide<br> Water<br> Gold
Igoryamba

Answer: Gold.

Explanation: Water, CO2, and table salt are compounds. They are composed of two or more separate elements; a mixture, where as gold is neither.

3 0
2 years ago
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How many atoms are in<br> 3Ca(CIO3)2
satela [25.4K]

Answer:

Explanation:

Percent composition by element

Element Symbol # of Atoms

Chlorine Cl 2

Calcium Ca 1

Oxygen O 6

4 0
2 years ago
What are accounts for physical properties?
Nezavi [6.7K]
Freezing point, boiling point, melting point, smell, attraction or repulsion to magnets, colour change, and many more examples.
3 0
3 years ago
(BRAINLIEST) Coal burning plants produce less air pollution than nuclear power plants
Alecsey [184]

Answer:

the answer of this question is true

7 0
3 years ago
2. What mass of sodium chloride is produced when chlorine gas reacts with 2.29 grams of sodium iodide? The unbalanced equation i
Damm [24]

Answer:

0.88g

Explanation:

The reaction equation:

         2NaI  + Cl₂   →    2NaCl  + I₂

Given parameters:

Mass of Sodium iodide = 2.29g

Unknown:

Mass of NaCl = ?

Solution:

To solve this problem, we work from the known to the unknown.

First find the number of NaI from the mass given;

   Number of moles  = \frac{mass}{molar mass}  

          Molar mass of NaI  = 23 + 126.9  = 149.9g/mol

 Now insert the parameters and solve;

     Number of moles  = \frac{2.29}{149.9}   = 0.015mol

So;

 From the balanced reaction equation;

            2 moles of NaI produced 2 moles of NaCl

          0.015mole of NaI will produce 0.015mole of NaCl

Therefore;

      Mass  = number of moles x molar mass

      Molar mass of NaCl = 23 + 35.5  = 58.5g/mol

Now;

      Mass of NaCl  = 0.015 x 58.5  = 0.88g

8 0
2 years ago
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