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emmainna [20.7K]
3 years ago
10

Which values are written in proper scientific notation? Check all that apply.

Chemistry
2 answers:
Korolek [52]3 years ago
7 0
3.50 × 10–4 is written in proper scientific notation
evablogger [386]3 years ago
4 0

The answers are numbers 3, 5 and 6

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Nervous System Freezes the Muscles:controls senses & most body functions .Carries message & information between the brai
Zolol [24]

Controls senses and most body functions .

Carries message and information between the brain & body​

Explanation:

The nervous system helps to control senses, body functions, carries message and information between brain and the body. It consists of the brain, spinal cord and the nerves.

  • Using series of electrical nerve impulses, the nervous system controls the body administration.
  • The brain, spinal cord and nerves directs communications between different parts of the body system.
  • It is divided into two broad categories, the central nervous system which consists of the brain and spinal cord and the peripheral nervous system which is made up the nerves.

Learn more:

neuron brainly.com/question/4662759

nervous system brainly.com/question/8701152

#learnwithBrainly

3 0
3 years ago
Calculate the molarity when 135 g of KCl is dissolved to make a 2.50 L solution. Round to two significant digits.
inysia [295]
<h2>0.72 mol/L</h2>

Explanation:

       \textrm{Molarity of a solution}=\frac{\textrm{Number of moles of solvent}}{\textrm{Volume of solution in Liters}}

       We are given a 2.50L solution which contains 135g of KCl.

       To calculate number of moles of KCl present, we need to find it's molar mass from charts. Molar Mass of KCl is known to be 74.55\frac{g}{Mol}.

       Number of moles of KCl present = \frac{\textrm{Given weight}}{\textrm{Molar Mass}}\textrm{ = }\frac{135g}{74.55\frac{g}{Mol}}\textrm{ = }1.81087mol

       Molarity = \frac{1.81087mol}{2.50L}=0.7243\frac{mol}{L}

∴ Molarity of given KCl solution = 0.72\frac{mol}{L}

7 0
3 years ago
*multiple choice*
OleMash [197]
I think the answer is A but I could be wrong
4 0
3 years ago
If a given aqueous solution at 298 K contains [H+] = 1.0 × 10-9, what is the [OH-]?
Zinaida [17]

Answer:

C.

Explanation:

\frac{1x10}x^{-14} = 1x10^{-9} \\ x =1x10^{-5} \\\\[OH][H]= 1x10^{-14}

The concetration can be found by dividing the water ph constant by the [H=] or [OH] to find the other

6 0
3 years ago
Peter and Jessica are both forensic scientists. Peter visits crime scenes to pr
ratelena [41]

Answer: Peter is a Field Officer and Jessica is a Lab Officer

Explanation:

For Plato it should be, Peter is a "Field officer" because he's going into the fiend of the crime scene to find his evidence

And Jessica is a "Lab officer" because she stay's in the lab to analyze the evidence brought to her by Peter  

8 0
3 years ago
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