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Crank
3 years ago
11

Which technology was essential for the development of the cell theory?​

Chemistry
1 answer:
vodka [1.7K]3 years ago
8 0

Answer: Microscope

Explanation: This is a kid answering :)

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What is the molarity of a salt solution made by dissolving 250.0 grams of NaCl in 775 mL of solution?
tester [92]

The molarity of a salt solution made by dissolving 250.0 grams of NaCl in 775 mL of solution is <u>5.52 M</u> .

<u>Explanation:</u>

The molarity of a solution tells one how many moles of <u>solute</u> one can get <em>per liter</em> of solution.One should remember to must convert this volume to liters by using the conversion factor:

1 L = 10³ml

Sodium chloride (NaCl) has a molar mass of 58.44 g per mol , which means that the sample will contain:

   250 \mathrm{g} \times \frac{1 \text { mole of } \mathrm{Nacl}}{58.44 \mathrm{g}}=4.278 \text { mole of } \mathrm{Nacl}

This means that the molarity of the solution will be:

\text {Molarity,c}=\frac{n_{\text {solute}}}{V_{\text {solution }}}=\frac{4.28}{775 \times 10^{-3}}=0.00552 \times 10^{3}=5.52 M

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3 years ago
What is a molecule???
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A molecule consists of group of atoms that are bonded together by chemical bond. It is the smallest particle of an element or a compound that has the properties of the element or the compound embedded in it. The atoms present in one element easily forms a bonding with the atoms of another element to form molecules. The size and complex nature of molecules varies hugely. Some molecules can have a single atom as is the case with helium, while in several other elements the number of atoms in the molecule can be more than one.
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Which process transfers heat from a hot pavement to a person sitting on it?
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conduction - the transfer of heat to an object through contact


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4 years ago
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Which of the following pairs of compounds can you directly compare against each other theoretically? (choose all that apply) (hi
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Answer:

b

Explanation:

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Which of the following electron configurations of outer sublevels is the most stable?
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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
4d5 5s1 is where electron configurations of outer sublevels is the most stable. <span>this could be a tricky question because of the fact the respond is going against the final rule that could say that 4d4 5s2 is the main sturdy. the final 2 a merely nonsence there is not any such factor as s3 or s4</span>
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