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3 years ago

When measuring the volume of a liquid in a graduating cylinder, you measure_____.

Chemistry

2 answers:

BaLLatris [955]3 years ago

7 0

The average between the volume at the top of and the bottom of the meniscus

nlexa [21]3 years ago

6 0

Answer: from the bottom of the meniscus

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At STP, 1 mole of gas has a molar volume of 22.4 L. What is the density (g/L) of oxygen at STP?

Bingel [31]

So the GFM of O2 is 32.00g/mol
If we have 1 mole of O2 we have 32.00g
32.00g/22.4L = 1.42857… aprox. 1.43g/L

Sorrr I’m not quite sure where PV=nRT comes in

5 0

1 year ago

Which chemical equations show an oxidation- reduction reaction

saveliy_v [14]

Answer:

O2 + 2H2 → 2H2O MgSO4 + CaCl2 → MgCl2 + CaSO4 2Al + 6HI → 2AlI3 + 3H2 FeCl2 + Na2CO3 → FeCO3 + 2NaCl 2AgNO3 + Na2S → Ag2S + 2NaNO3

4 0

2 years ago

How many of each element would you find in AI(NO3)3?

Leno4ka [110]

Answer:

you will find 3 in aluminium

hydrogen should be b 3

and oxygen is 9

7 0

1 year ago

Two samples of potassium iodide are decomposed into their constituent elements. The first sample produced 13.0 g of potassium an

Cerrena [4.2K]

Answer:

79.4 kg

Explanation:

The formula for potassium iodide is:-

$KI$

This means that they are present in the same mole ration, i.e. 1 : 1

Also for 2 samples, the ratio of the masses must be equal .

So,

$\frac{Mass\ of\ potassium\ in\ sample\ 1}{Mass\ of\ Iodine\ in\ sample\ 1}=\frac{Mass\ of\ potassium\ in\ sample\ 2}{Mass\ of\ Iodine\ in\ sample\ 2}$

Thus,

Mass of potassium in sample 1 = 13.0 g

Mass of Iodine in sample 1 = 42.3 g

Mass of potassium in sample 2 = 24.4 kg

Applying in the above formula, we get that:-

$\frac{13.0\ g}{42.3\ g}=\frac{24.4\ kg}{Mass\ of\ Iodine\ in\ sample\ 2}$

Mass of iodine in sample 2 = 79.4 kg

5 0

3 years ago

What is the correct formula for glucose? A) CO2H2O B) C6H12O6 C) CHO D) CO2 + H2O

chubhunter [2.5K]

Answer:

It's B !

Explanation:

Formulas. The molecular formula for glucose is C6H12O6. This means that there are 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms bonded together to make one molecule of glucose.

Hope this helps!!

8 0

3 years ago