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2 years ago

12

I need help with these questions fast plz no links!!!!

1 answer:

nydimaria [60]2 years ago

8 0

Answer:

c

B

B

I Hope u can understand and it's correct answer

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Which of the following elements are good insulators?

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In the laboratory, a volume of 100 mL of sulfuric acid (H2SO4) is recorded. How many g are there of the liquid if its density is

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$\large \boxed{\text{183 g}}$

Explanation:

$\begin{array}{rcl}\text{Density} & = & \dfrac{\text{Mass}}{\text{Volume}}\\\\\rho & = &\dfrac{m}{V}\\\\1.83 \text{ g$\cdot$ cm}^{-3} & = & \dfrac{m}{\text{100 cm}^{3}}\\\\m & = & \text{183 g}\\\end{array}\\\text{There are $\large \boxed{\textbf{183 g}}$ of sulfuric acid.}$

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3 years ago

How many moles are in a 111.5 gram sample of sodium chloride, NaCl?

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Answer: 1.91 moles

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First you want to find the molar mass of NaCL

Na = 22.99g Cl = 35.45g

22.99g + 35.45g = 54.44g

Then divide 111.5g by 54.44g and this will give you moles.

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2 years ago

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