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irga5000 [103]
3 years ago
13

What reacts with oxygen?

Chemistry
2 answers:
lesya [120]3 years ago
7 0
Sodium reacts to oxygen
Andrews [41]3 years ago
6 0
Group 1 metals react vigorously with oxygen (Lithium, Sodium, Potassium, Rubidium, Caesium and Francium)
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What is the mass of Na2CO3 required to make a
Paladinen [302]

Answer:

21.2 g

Explanation:

Step 1: Given data

  • Molar concentration of the solution (C): 0.400 mol/L
  • Volume of solution (V): 500 mL (0.500 L)

Step 2: Calculate the moles of Na₂CO₃ (solute) in the solution

We will use the definition of molarity.

C = moles of solute / liters of solution

moles of solute = C × liters of solution

moles of solute = 0.400 mol/L × 0.500 L = 0.200 mol

Step 3: Calculate the mass corresponding to 0.200 moles of Na₂CO₃

The molar mass of Na₂CO₃ is 105.99 g/mol.

0.200 mol × 105.99 g/mol = 21.2 g

8 0
3 years ago
Determine the empirical formula of a compound containing 30.4%N and 69.6%O
pochemuha
30.4 is the answer 


<span> composition is: 58.8 0/0 C, 9.9 0/0 H, and 31.3 0/0 </span>O<span>. Ifit's molecular mass is 306 ... composition of the </span>compound<span> is </span>30.4<span>% </span>
6 0
4 years ago
If a gas occupies 4600 mL at 0.9 atm and 195°C, what is the new volume in ml
Bumek [7]

Answer:

The new volume is 2415 mL

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases.

Boyle's law says that the volume occupied by a given gas mass at constant temperature is inversely proportional to the pressure and is expressed mathematically as:

P * V = k

Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

\frac{V}{T} =k

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the gas pressure increases. And when the temperature is decreased, the gas pressure decreases. This can be expressed mathematically in the following way:

\frac{P}{T} =k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\frac{P*V}{T} =k

Having two different states, an initial state and an final state, it is true:

\frac{P1*V1}{T1} =\frac{P2*V2}{T2}

In this case:

  • P1= 0.9 atm
  • V1=4,600 mL= 4.6 L (being 1 L=1,000 mL)
  • T1= 195 °C= 468 °K (being 0°C=273°K)

The final state 2 is in STP conditions:

  • P2= 1 atm
  • V2= ?
  • T2= 0°C= 273 °K

Replacing:

\frac{0.9 atm*4.6L}{468K} =\frac{1 atm*V2}{273K}

Solving:

V2=\frac{0.9 atm*4.6L}{468K}*\frac{273K}{1 atm}

V2= 2.415 L =2,415 mL

<u><em>The new volume is 2415 mL</em></u>

6 0
3 years ago
How many grams of Rb2O is produced from decomposing 24 moles of RbOH ?
solong [7]

Answer:

4486

Explanation:

3 0
3 years ago
Which of the solutions below will have the lowest ph? 0.10 m hbr 0.10 m hf 0.25 m hc2h3o2?
taurus [48]
PH value of 0.10 m of HBr, a strong acid. 
When dissolved in water it gives H+ and Br-, so H+ is the concentration.  
pH = - log H+) => pH = - log (0.10) = -(-1) = 1 
HF and HC2H3O2 are weak acids. They both will have pH value greater than 1 as they ionize in solution.
8 0
4 years ago
Read 2 more answers
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