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2 years ago

Please Help! Hurry!

Chemistry

2 answers:

Rasek [7]2 years ago

6 0

Answer:

A. the jar covers

Explanation:

An independent variable is what you, as the scientist, changes.

nydimaria [60]2 years ago

3 0

Answer: a

Explanation:

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An auomobile can travel 40.0 miles on one gallon of gasoline.how many kilometers per liter is this?(1.61 km= 1 mi; 1L=0.246 gal)

Karo-lina-s [1.5K]

40 mi/gal * 1.61 km/mi * 0.264 gal/li

40*1.61*0.264

17 km/li

7 0

2 years ago

What mass of silver oxide, Ag2O is required to produce 25.0 g of silver sulfadiazine, AgC10H9N4SO2, from the reaction of silver

Wittaler [7]

Answer:

8.1107 g

Explanation:

The given reaction:

$2C_{10}H_{10}N_4SO_2+Ag_2O\rightarrow 2AgC_{10}H_9N_4SO_2+H_2O$

Given that:

Mass of silver sulfadiazine = 25.0 g

Molar mass of silver sulfadiazine = 357.14 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{25.0\ g}{357.14\ g/mol}$

$Moles= 0.07\ mol$

From the reaction,

2 moles of silver sulfadiazine are formed from 1 mole of silver oxide

So,

1 mole of silver sulfadiazine are formed from 1/2 mole of silver oxide

0.07 mole of silver sulfadiazine are formed from 1/2*0.07 mole of silver oxide

Moles of silver oxide = 0.035 moles

Molar mass of silver oxide = 231.735 g/mol

Mass = Moles * Molar mass = 0.035 moles * 231.735 g/mol = 8.1107 g

4 0

3 years ago

How do we form Ionic Compounds?

brilliants [131]

Answer

Ionic compounds are formed when metals react with non-metals . Ionic compounds held together by ionic bonds are classed as ionic compounds.

Explanation:

I used this to awnser this queston when I was a freshmen in high school.

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2 years ago

Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).

slamgirl [31]

Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).
1.20 moles of Silicon are added to 1.00 moles of Nitrogen gas.
(5 Points) Balance the equation and indicate the phases.

Si (___) + N2 (___) → Si3N4 (___)

(5 Points) What is the limiting reactant? You must show your work.

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3 years ago

How do I find density

skad [1K]

Divide mass by the volume to find density.

7 0

3 years ago