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3 years ago

How many moles of mgci2 are there in 332 g of the compound

Chemistry

1 answer:

Agata [3.3K]3 years ago

3 0

Find molar mass of MgCl2 so M=<span>95.211 g/mol
N=m/M
N=332/95.2
N=3.487
dont forget to round your sig figs </span>

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A 215-g sample of copper metal at some temperature is added to 26.6 g of water. The initial water temperature is 22.22 oC, and t

andrezito [222]

The initial temperature of the copper metal was 27.38 degrees.

Explanation:

Data given:

mass of the copper metal sample = 215 gram

mass of water = 26.6 grams

Initial temperature of water = 22.22 Degrees

Final temperature of water = 24.44 degrees

Specific heat capacity of water = 0.385 J/g°C

initial temperature of copper material , Ti=?

specific heat capacity of water = 4.186 joule/gram °C

from the principle of:

heat lost = heat gained

heat gained by water is given by:

q water = mcΔT

Putting the values in the equation:

qwater = 26.6 x 4.186 x (2.22)

qwater = 247.19 J

qcopper = 215 x 0.385 x (Ti-24.4)

= 82.77Ti - 2019.71

Now heat lost by metal = heat gained by water

82.77Ti - 2019.71 = 247.19

Ti = 27.38 degrees

8 0

3 years ago

If two elements are from the

Vladimir79 [104]

Answer:

The element from Group 13.

Explanation:

Following trends of the periodic table, atomic radius of the elements increase going down from the right side and decrease on its way up diagonally to the left. (sry if u can't understand me)

7 0

3 years ago

Thomas has 235 grams of K2S in the chemistry lab. How many atoms of potassium (K) are in 235 grams of the compound?

iVinArrow [24]

The number of atoms of K that are in 235 g of the compound is

2.57 x10^24 atoms

calculation

Step 1: find the moles of K2S

= moles = mass/molar mass

= 235 g/110 g/mol= 2.136 moles

Step 2: multiply 2.136 moles by no. of K atoms in K2S

= 2.136 x2 = 4.272 moles

Step 3: use the Avogadro's law to determine number of K atoms

that is according to Avogadro's law 1 mole = 6.02 x 10^23 atoms

4.272 moles= ? atoms

by cross multiplication

= (4.272 moles x 6.02 x10^23 atoms) / 1 mole = 2.57 x10^24 atoms

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3 years ago

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Ganezh [65]

Answer:

Explanation:

Linoleic acid, which is polyunsaturated fatty acid, found

the three resonance structures are given as,

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3 years ago

What property must a solid have to be considered a crystalline solid

PolarNik [594]

The atoms of the solid have to form a crystalline structure, which means that they have an ordered configuration that is the same throughout the entire solid.

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3 years ago