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ololo11 [35]
3 years ago
13

Can someone help me with number 4? Please and thank you

Chemistry
1 answer:
kipiarov [429]3 years ago
6 0

Answer:

1st Blank: <em>1 Co</em>

2nd Blank:<em> 2 Na2S</em>

3rd Blank:<em> 4 Na</em>

4th Blank:<em> 1 CoS2</em>

Explanation:

<em>Trust me</em>

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Iron-59 has a half-life of 44 days. a radioactive sample has an activity of 0.64 mbq. what is the activity of the sample after 8
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4 years ago
Identify the acid-conjugate base pair in this balanced equation:
Nataliya [291]

Answer:

The answer is B. H2SO4/Na2SO4

Explanation:

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Water exist as a liquid between 0 and 100 Celsius.<br><br> a. True<br><br> b. False
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Which of the following equations is balanced correctly and has the correct products for the reactants RbNO3 and BeF2?3RbNO3 + 3B
zvonat [6]

Answer:

2RbNO₃ + BeF₂ → Be(NO₃)₂ + 2RbF, because Be keeps a 2+ charge throughout the reaction.

Explanation:

  • It is a double replacement reaction.
  • A double replacement reaction is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.
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  • So, the right choice is:

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3 years ago
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