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MissTica
4 years ago
8

1:

Chemistry
1 answer:
Vlad1618 [11]4 years ago
4 0

Answer:

1. Iron sulfide is the mineral that can be decomposed by black smokers

2.??

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When the concentration of molecules on both sides of a membrane is the same, the molecules will
denis-greek [22]
B is correct....................
6 0
3 years ago
What happens when a pure substance undergoes a chemical change
Zina [86]
Google will help you with this
8 0
3 years ago
A sample of oxygen gas has a volume of 5.60 l at 27°c and 800.0 torr. how many oxygen molecules does it contain?
ratelena [41]
<span>1.44x10^23 molecules of oxygen gas The ideal gas law is PV = nRT where P = pressure (800.0 Torr) V = volume (5.60 L) n = number of moles R = Ideal gas constant (62.363577 L*Torr/(K*mol) ) T = absolute temperature (27C + 273.15 = 300.15 K) Let's solve for n, the substitute the known values and solve. PV = nRT PV/RT = n (800.0 Torr*5.60 L)/(62.363577 L*Torr/(K*mol)*300.15 K) = n (4480 L*Torr)/(18718.42764 L*Torr/mol) = n 0.239336342 mol = n So we have 0.239336342 moles of oxygen molecules. To get the number of atoms, we need to multiply by avogadro's number, so: 0.239336342 * 6.0221409x10^23 = 1.44x10^23</span>
8 0
3 years ago
If 18.0 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentra
k0ka [10]

<em>Answer:</em>

  • The molarity of ammonia will be 2.88 M.

<em>Chemical equation</em>

                                      HCl +  NH3 ------> NH4Cl

First of calculate the moles of HCl

mole of HCl = Molarity × Vol (L)

mole of HCl = 0.800× 0.018 = 0.014 mole

As the in balance chemical, moles of HCl and NH3 areequal

so

                        moles of NH3= 0.014

                       Molarity of NH3 = moles ÷ V(L) = 0.014/0.005 =  2.88 M

<em>Result</em>:

  • The molarity of ammonia will be 2.88 M.
3 0
3 years ago
Based on its position on the periodic table sodium is a solid at room temperature
ruslelena [56]

True

Explanation:

The position of sodium on the periodic table makes the element a solid at room temperature is very correct.

  • Sodium is an elements with 11 electrons in its shell.
  • It is located in group 1 on the periodic table because it contains an outer valence electron.
  • In a free state Na metal, the atoms exhibit metallic bonding.
  • Metallic bonding is responsible for the solid nature of this alkali metal at room temperature.
  • It is highly reactive because it has just one valence electron.
  • Metals are usually found left of the periodic table.

Learn more:

Group 1 brainly.com/question/2154626

#learnwithBrainly

6 0
4 years ago
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