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3 years ago

Please help me with chem, it would be very appreciated!

1 answer:

5 0

To determine the shapes of molecules, we must become acquainted with the Lewis electron dot structure. Although the Lewis theory does not determine the shapes of molecules, it is the first step in predicting shapes of molecules. The Lewis structure helps us identify the bond pairs and the lone pairs.

Please mark BRAINLIEST.

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Solid magnesium has mass of 1300g and a volume of 743cm . what's the density of magnesium?

Lilit [14]

D = m / V

d = 1300 g / 743 cm³

d = 1.749 g/cm³

3 0

3 years ago

A laboratory stock solution is 1.50 m naoh. calculate the volume of this stock solution that would be needed to prepare 300. ml

myrzilka [38]

laboratory stock solution is 1.50 M NaOH. Calcul. Show transcribed image text A laboratory stock solution is 1.50 M NaOH. Calculate the volume of this stock solution that would be needed to prepare 300. ml

8 0

4 years ago

The dosage for an antibiotic is prescribed at 8.0 mg per kilogram of body weight taken it twice daily for 2 weeks what total mas

krek1111 [17]

Answer:

18.2784 g

Explanation:

First we convert 180 lb to kg:

1 lb = 0.453 kg

180 lb * 0.453 kg / lb = 81.6 kg

Now we calculate the mass of antibiotic taken in one day:

8.0 mg/kg * 81.6 kg = 652.8 mg

Given that it is taken twice daily, in one day the person would take (652.8 * 2) 1305.6 mg. In grams that mass would be:

1305.6 mg / 1000 = 1.3056 g

Finally we multiply those 1.3056 daily grams by the 14 days in two weeks:

(1.3056 g) * 14 = 18.2784 g

7 0

3 years ago

What is the correct name of the compound that is incorrectly named 1-chloro-3-pentyne?

sleet_krkn [62]

No that is why I am asking for help

3 0

3 years ago

Read 2 more answers

What is the name of the compound NiC03 * 8H20?

Hoochie [10]

The answer is :

Nickel II carbonate octahydrate

The explanation:

-when Ni is the symbol of Nickel.

and CO3 is the symbol of carbonate group.

and both have 2 valence so, it will be write 2:2 = 1:1 → NiCO3 named Nickel caronae.

and any compound contain H2O will be named Hydrate and here we have 8 H2O so, i will e named octa (because of his 8 ) octahydrate

so, the compound will be Nickel II carbonate octahydrate

5 0

3 years ago