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3 years ago

Perform the following calculation and report the answer with the correct number of significant figures.

Chemistry

2 answers:

Paul [167]3 years ago

8 0

Answer:

81.72 +0.73=82.45

Explanation:

you need to add it

81.72

+0.73

= 82.45

4vir4ik [10]3 years ago

4 0

82.72 + 0.73 = 82.45

Explanation:

0.72+0.73 = 1.45

Therefore 81+1.45= 82.45 ( Integer in addition with a decimal number).

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0.378g grams of a compound is made up of 0.273g of Mg and 0.105g nitrogen. Find its empirical formula.

Harrizon [31]

Answer:

The empirical formula of the compound is $Mg_3N_2$ .

Explanation:

Mass of magnesium in compound = 0.273 g

Mass of nitrogen in the compound = 0.105 g

Moles of magnesium = $\frac{0.273 g}{24.305 g/mol}=0.0112 mol$

Moles of nitrogen = $\frac{0.105 g}{14.0067 g/mol}=0.00750 mol$

Form empirical formula divides the lowest value of moles of an element present with all the moles of elements present.

Magnesium $=\frac{0.0112 mol}{0.00750 mol}=1.5$

Nitrogen $=\frac{0.00750mol}{0.00750 mol}=1$

The empirical formula of a compound:

$Mg_{1.5}N_1=Mg_{\frac{15}{10}}N_1=Mg_{15}N_{10}=Mg_3N_2$

The empirical formula of the compound is $Mg_3N_2$ .

3 0

3 years ago

Complete the following reaction :<br><br>HC≡CH + HBr→?

Morgarella [4.7K]

hope it helps you .............

3 0

3 years ago

Group 18 noble gases are relatively inert because *

choli [55]

Answer:I believe its A. There noble gasses so there happy with there electron count!

Explanation:

3 0

3 years ago

A compound has the name iodine pentafluoride. What kind of bond is present between the atoms? A. O Metallic B Covalent C. Hydrog

8090 [49]

Answer:

IF(subscript 5)

Explanation:

covalent.

3 0

3 years ago

We can change gas to a liquid by(Increasing, decreasing, removing) the temperature and (increasing, decreasing, removing ) the p

xz_007 [3.2K]

Decreasing

Increasing

Explanation:

We can change gas to liquid by decreasing the temperature and increasing the pressure.

Temperature is the degree of hotness or coldness of a body.
It is a function of how much heat it has absorbed or lost.
Heat causes the thermal energy of a system to increase and the particles becomes randomized.
Pressure is the force per unit area of particles.
If we decrease the temperature of gases, they have less kinetic energy and entropy reduces.
The will not be random.
Further increasing their pressure will bring them together and make them flow like liquid.
This phase change is often called condensation.

learn more:

Phase change brainly.com/question/1875234

#learnwithBrainly

8 0

4 years ago