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Novay_Z [31]
3 years ago
8

Which of the following correctly describes a compound? (4 points) a The atoms are chemically bonded together, and they retain th

eir individual physical and chemical properties. b The atoms are not chemically bonded, and there is no set ratio for how the atoms can combine together. c The atoms can only combine in fixed ratios, and they can only be separated by a chemical change. d The atoms do not retain their individual chemical properties, and they can be separated by physical means.
Chemistry
1 answer:
stepladder [879]3 years ago
7 0
Yes it’s A thank you for asking!! I knew it from the beginning!
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Enter the formula for the polyatomic ion in MnCO3.
joja [24]
The formula is Mn2+CO2= MnCO3
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3 years ago
The density of an unknown gas at 98°C and 740 mmHg is 2.50 g/L. What is the molar mass of the gas with work showed?
noname [10]

Answer:

78.2 g/mol  

Step-by-step explanation:

We can use the <em>Ideal Gas Law</em> to solve this problem:

       pV = nRT

Since n = m/M, the equation becomes

      pV = (m/M)RT     Multiply each side by M

   pVM = mRT               Divide each side by pV

        M = (mRT)/(pV)

Data:

ρ = 2.50 g/L

R = 0.082 16 L·atm·K⁻¹mol⁻¹

T =98 °C

p = 740 mmHg

Calculation:

(a)<em> Convert temperature to kelvins </em>

T = (98 + 273.15) = 371.15 K

(b) <em>Convert pressure to atmospheres </em>

p = 740 × 1/760 =0.9737 atm

(c) <em>Calculate the molar mass </em>

Assume V = 1 L.

   Then m = 2.50 g

            M = (2.50 × 0.082 06 × 371.15)/(0.9737 × 1)

                = 76.14/0.9737

                = 78.2 g/mol

3 0
3 years ago
Divergent plate boundary is when two plates come together <br><br><br><br> True or false
Ivahew [28]

False, divergent boundaries are when two plates move away from each other.

7 0
3 years ago
Rationing is an attempt to limit shortages that naturally result from what?
makvit [3.9K]

Answer:

Price ceiling. In order to limit the shortages that naturally result from a price ceiling, the government can do what to certain goods? Ration.

Explanation:

5 0
3 years ago
If 1,2-dichloroethane has a density of 1.23 g/ml, how do you expect it to sit in a separatory funnel with an aqueous solution?
Jobisdone [24]

1,2-dichloroethane of density 1.23 g/ml would settle down an aqueous solution.

<h3>Density:</h3>

Knowing whether the aqueous layer is above or below the organic layer in the separatory funnel is crucial since it determines which layer is ultimately kept and discarded. Because immiscible solvents have different densities, they will stack on top of one another. The less-dense solution will rest on top, and the more dense one will rest at the bottom.

Due to their low density of less than 1 g/mL, the majority of non-halogenated organic solvents will float on top of an aqueous solution (if they are immiscible). One significant exception is that halogenated solvents will sink below aqueous solutions because they are denser than water (having densities greater than 1 g/mL). Except for halogenated solvents like dichloromethane, which are usually on the bottom, most organic solvents, such as diethyl ether, are on top.

Learn more about aqueous layer here:

brainly.com/question/14356327

#SPJ4

5 0
2 years ago
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