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WINSTONCH [101]

3 years ago

10

PLEASE HELP!!!! Draw a representation of John Dalton’s atomic model.

1 answer:

larisa [96]3 years ago

7 0

Answer:

John Dalton's Atomic Model Below ⬇

Explanation:

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PLEASE HELP??<br> Describe how the periodic table differentiates between metals and nonmetals.

Dovator [93]

Metals are the majority of the periodic table. Also, they are on the left side of the periodic table. The no metals are on the right side of periodic table.
Hope I Helped!

4 0

3 years ago

100.0 mL of 3.8M NaCN, the minimum lethal concentration of sodium cyanide in blood serum

9966 [12]

The given question is incomplete. The complete question is:

Calculate the number of moles and the mass of the solute in each of the following solution: 100.0 mL of 3.8 × 10−5 M NaCN, the minimum lethal concentration of sodium cyanide in blood serum

Answer: The number of moles and the mass of the solute are $0.38\times 10^{-5}$ and $18.62\times 10^{-5}g$ respectively

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in ml

$3.8\times 10^{-5}M=\frac{n\times 1000}{100.0}$

$n=0.38\times 10^{-5}$

n = moles of $NaCN$ = $\frac{\text {given mass}}{\text {Molar mass}}$

$0.38\times 10^{-5}=\frac{x}{49g/mol}$

$x=18.62\times 10^{-5}g$

Thus the number of moles and the mass of the solute are $0.38\times 10^{-5}$ and $18.62\times 10^{-5}g$ respectively

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3 years ago

Calculate the m/m% of casein in the milk sample:

Lapatulllka [165]

Answer:What kind of milk? What are the variables on your project? (I'm assuming it's an experiment)

Explanation:

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3 years ago

The lewis dot structure rule states that

Rama09 [41]

Answer:

32

Explanation:

The total valence electron is available for the Silicon tetrachloride

lewis structure is 32

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2 years ago

Trina walked into the kitchen and saw that the cake she'd put in the refrigerator the night before was gone. She said to

rjkz [21]

Answer:

the answer is b

Explanation:

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3 years ago