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Reptile [31]
3 years ago
7

Suppose that the expected value of a measurement is 17 N.

Chemistry
2 answers:
Sunny_sXe [5.5K]3 years ago
6 0
C ahaha siwvushss sjdjshsgau avians
iragen [17]3 years ago
4 0

Answer:

Jaga Raga OI roti caita C

Explanation:

You might be interested in
30 POINTS! ----- How many moles of oxygen gas are needed to completely react with 145 grams of aluminum? Report your answer with
gladu [14]
First a balanced reaction equation must be established:
4Al _{(s)}    +   3 O_{2}  _{(g)}     →    2 Al_{2} O_{3}

Now if mass of aluminum = 145 g
the moles of aluminum = (MASS) ÷ (MOLAR MASS) = 145 g ÷ 30 g/mol
                                                                                    =  4.83 mols

Now the mole ratio of Al : O₂ based on the equation is  4 : 3  
                                                                [4Al  + 3 O₂ → 2 Al₂O₃]

∴ if moles of Al = 4.83 moles
  then moles of O₂ = (4.83 mol ÷ 4) × 3
                              =  3.63 mol   (to  2 sig. fig.) 

Thus it can be concluded that 3.63 moles of oxygen is needed to react completely with 145 g of aluminum. 


     
4 0
3 years ago
John is carefully pouring a chemical into a beaker when the beaker slips and breaks
Kryger [21]

Following laboratory safety protocols such as wearing personal protective equipment will protect John when the accident occurred.

<h3>What are laboratory safety protocols?</h3>

Laboratory safety protocols are the protocols put in place to ensure safety in the laboratory.

Laboratory safety protocols include the following:

  • always wear personal protective equipment in the laboratory
  • do not play in the laboratory
  • do not eat in the laboratory

Following laboratory safety protocols will help protect us from accidents which occur in the laboratory.

What happened when john was carefully pouring a chemical into a beaker when the beaker slips and breaks is an example of laboratory accident.

Wearing personal protective equipment will protect John.

In conclusion, following laboratory safety protocols will protect us when accidents occur in the laboratory.

Learn more about laboratory safety protocols at: brainly.com/question/17994387

#SPJ1

Note that the complete question is given as follows:

John is carefully pouring a chemical into a beaker when the beaker slips and breaks. How would laboratory safety protocols help John?

5 0
2 years ago
If an atom gains an electron it is known as what ? And has a negative charge
bekas [8.4K]
If an atom gains an electron and gets a negative charge because of it, it is a negatively charge ion AKA an anion.
6 0
3 years ago
A motorcycle traveling at 19 m/s starts to slow down steadily, then it stops completely in 10 seconds. What is the motorcycle ac
Dmitry [639]

Answer:

-1,9m/s^{2}

Explanatio:

a=\frac{v-v_{0} }{t}

=\frac{0-19}{10}=-1,9m/s^{2}

3 0
2 years ago
How many hours are in 25 years?
Annette [7]
There are *219,000* hours in 25 years
6 0
3 years ago
Read 2 more answers
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