1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mars2501 [29]
2 years ago
11

Please help ASAPPPPP

Chemistry
1 answer:
inessss [21]2 years ago
4 0
30 grams of CO2 … that’s the answer but brainly wants 20 words

You might be interested in
How many moles are there in 7.5 L Of H2
True [87]
So multiply number of moles x number of atoms/mole = 1.8066 x 10^24 atoms of H2. One mole of any gas at STP has a volume of 22.4 L. So first determine the number of moles of gas you have.
for example do 7
7.5 \div 22.4
that 's what I think
3 0
3 years ago
Un globo lleno de helio tenia un volumen de 8.5 L en el suelo a 20°C y a una presión de 750 torr. Cuando se le soltó, el globo s
Ray Of Light [21]

Answer:

El volumen del gas era 12.95 L

Explanation:

Se relaciona la presión y el volumen mediante la ley de Boyle, que dice:

“El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”

La ley de Boyle se expresa matemáticamente como:  P*V=k

Por otro lado, la Ley de Charles consiste en la relación que existe entre el volumen y la temperatura absoluta de una cierta cantidad de gas ideal, el cual se mantiene a una presión constante. Esta ley dice que cuando la cantidad de gas y de presión se mantienen constantes, el cociente que existe entre el volumen y la temperatura siempre tendrán el mismo valor:  

\frac{V}{T}=k

Por último, la Ley de Gay Lussac dice que la temperatura absoluta y la presión son directamente proporcionales. Es decir, cuando se mantiene todo lo demás constante, mientras suba la temperatura de un gas subirá también su presión. Y mientras la temperatura del gas baje, lo mismo ocurrirá con la presión:

\frac{P}{T}=k

Combinado las mencionadas tres leyes se obtiene:

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

Cuando se desean estudiar dos diferentes estados, uno inicial y una final de un gas, se puede aplicar:

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

Recordando que la temperatura debe usarse en grados Kelvin, conoces los siguientes datos:

  • P1: 750 torr
  • V1: 8.5 L
  • T1: 20°C= 293°K (siendo 0°C=273°K)
  • P2: 425 torr
  • V2: ?
  • T2: -20°C= 253 °K

Reemplazando:

\frac{750 torr*8.5 L}{293K} =\frac{425 torr*V2}{253 K}

Resolviendo:

V2=\frac{750 torr*8.5 L}{293K} *\frac{253 K}{425 torr}

V2= 12.95 L

<u><em>El volumen del gas era 12.95 L</em></u>

<u><em></em></u>

5 0
3 years ago
Locate the element zinc (Zn) on the periodic table. How many protons does an atom of zinc contain? How many electrons does an at
Lady bird [3.3K]
<h2>Answer:</h2><h3>Part 1:</h3>

Location the element zinc (Zn) on the periodic table:

  •    Group number : 12
  •     Period number : 4
  •     Block :  d block
  •      Element : Transition elements.
<h3>Part 2:</h3>

Protons in an atom of Zn:  30

<h3>Part 3:</h3>

Electrons in a Zn atom: 30

<h3>Part 4 :</h3>

Neutron in an atom of Zn: 35


<h3 />
4 0
3 years ago
Read 2 more answers
What are the molality and mole fraction of solute in a 22.2 percent by mass aqueous solution of formic acid (HCOOH)?
hodyreva [135]
Calculate  the  mass  of  water  used
that  is
100-22.2=77.8g  convert   into  Kg = 77.8/1000=0.0778Kg  of  water

then  calculate  the  moles  of HCOOH  used
that   is  22.2g/molar  mass  of HCOOH(1+12+16+16+1)=46
therefore  the  moles  of HCOOH=22.2/46=0.48moles
 the  mole  of  water=  77.8/18(molar  mass  of  water= 4.32moles

the   molarity of  HCOOH =  0.48mol/0.0778kg=6.17M

The   mole  ratio= moles  of HCOOH  divided  by  total  moles
the  total  moles=  0.48+4.32=4.8moles
therefore  the  mole  ratio=   0.48/4.8moles=0.1(the  moles  fraction  of  HCOOH)
7 0
3 years ago
a solution is made by dissolving cadmium fluoride (CdF2 Ksp =6.44×10 −3 ) in 100.0 mL of water until excess solid is present. So
Lunna [17]

Answer:

Answers are in the explanation

Explanation:

Ksp of CdF₂ is:

CdF₂(s) ⇄ Cd²⁺(aq) + 2F⁻(aq)

Ksp = 6.44x10⁻³ = [Cd²⁺] [F⁻]²

When an excess of solid is present, the solution is saturated, the molarity of Cd²⁺ is X and F⁻ 2X:

6.44x10⁻³ = [X] [2X]²

6.44x10⁻³ = 4X³

X = 0.1172M

<h3>[F⁻] = 0.2344M</h3><h3 />

Ksp of LiF is:

LiF(s) ⇄ Li⁺(aq) + F⁻(aq)

Ksp = 1.84x10⁻³ = [Li⁺] [F⁻]

When an excess of solid is present, the solution is saturated, the molarity of Li⁺ and F⁻ is XX:

1.84x10⁻³ = [X] [X]

1.84x10⁻³ = X²

X = 0.0429

<h3>[F⁻] = 0.0429M</h3><h3 /><h3>The solution of CdF₂ has the higher fluoride ion concentration</h3>
7 0
3 years ago
Other questions:
  • Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. A pur
    15·1 answer
  • Newton contributed to astronomy by:
    7·2 answers
  • How is the periodic table helpful in determining the types of bonds an element will form?
    9·1 answer
  • If you had excess aluminum, how many moles of aluminum chloride could be produced from 28.0 g of chlorine gas, Cl2?
    6·1 answer
  • Who first determined the value of the avogadros number​
    7·1 answer
  • Identify the element with 3 energy levels and 2 valence electrons.
    14·1 answer
  • How many liters of 
    15·1 answer
  • Determine how many carbon dioxide (CO2) molecules are produced if 8.45 x 1023 molecules of water (H2O) are produced 2 C2H6 (g) +
    10·1 answer
  • Plz help ASAP i will give brainlists
    14·1 answer
  • How many moles of Cs are contained in 3 moles of Cs3PO4?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!