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
polet [3.4K]
3 years ago
6

Calcule el porcentaje de soluto (%vv) en una disolución preparada con 45,2 mL de ácido nítrico en 205 mL de agua.

Chemistry
1 answer:
ryzh [129]3 years ago
5 0

Answer:

18.1% V/V

Explanation:

El porcentaje volumen/volumen (%v/v) es una unidad de concentración en química definida como la relación entre volumen de soluto y volumen total de la solución (En las mismas unidades ambos volúmenes) por cien. La fórmula es:

% V/V = Volumen soluto / Volumen solución × 100

Analizando el problema, el soluto es ácido nítrico (Menor cantidad) y el solvente es el agua.

Recordando, el volumen de la solución es igual al volumen del soluto + el volumen del solvente. Así:

% V/V = 45.2mL soluto / (45.2mL + 205mL) × 100 =

<em>18.1% V/V</em> es la concentración de la solución.

You might be interested in
.
a_sh-v [17]
The writers of the Articles of Confederation wanted to preserve the states' sovereignty.
7 0
3 years ago
Calculate the number of Calories present in a chocolate chip cookie that contains 19 g carbohydrate, 3 g protein, and 9 g fat.
agasfer [191]
Im unsure :( maybe try looking up a calorie calculator
5 0
3 years ago
You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physics. Y
lbvjy [14]

Answer: 2.58 days

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = ?

t = age of sample  = 6 days

a = initial amount of the reactant  =  1 g

a - x = amount left after decay process   = 0.2 g

a) to find the rate constant

6=\frac{2.303}{k}\log\frac{1.0}{0.2}

k=\frac{2.303}{6}\log\frac{1.0}{0.2}

k=0.268days^{-1}

b) for completion of half life:  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

t_{\frac{1}{2}}=\frac{0.693}{0.268}=2.58days

The half life is 2.58 days

3 0
3 years ago
Draw an electrolytic cell in which Mn2+ is reduced to Mn and Sn is oxidized to Sn2+. (Assume standard conditions).
babunello [35]

Answer:

-1.05 V

Explanation:

A detailed diagram of the setup as required in the question is shown in the image attached to this answer. The electrolytes chosen are SnCl2 for the anode half cell and MnCl2 for the cathode half cell. Tin rod and manganese rod are used as the anode and cathode materials respectively. Electrons flow from anode to cathode as indicated. The battery connected to the set up drives this non spontaneous electrolytic process.

Oxidation half equation;

Sn(s) ------> Sn^2+(aq) + 2e

Reduction half equation:

Mn^2+(aq) + 2e ----> Mn(s)

Cell voltage= E°cathode - E°anode

E°cathode= -1.19V

E°anode= -0.14 V

Cell voltage= -1.19 V - (-0.14V)

Cell voltage= -1.05 V

8 0
3 years ago
Why shouldn’t we fill up balloons with hydrogen gas ?
aivan3 [116]

Answer: Because hydrogen is a gas.

Explanation: If children were running around with balloons filled with hydrogen gas, then they would catch fire. So the answer to your question is, its simply dangerous.

5 0
3 years ago
Other questions:
  • Condors are related to vultures and feed on carrion, or dead animals.
    13·1 answer
  • 8.41 x 10 to the -7 grams to microgram
    14·1 answer
  • Which of the following is considered a contact force
    14·2 answers
  • What is this temperature in degree celsius of 77.2k
    14·1 answer
  • Perhatikan persamaan termokimia berikut.
    11·1 answer
  • If you place a weighing boat (0.229 g) on the balance, hit the tare/zero button, weigh 0.678 g of NaCl, then remove everything f
    15·2 answers
  • By how many times would you expect Al2(SO4)3 to depress the F.P of water compared to sucrose C12H22011 ?​
    11·1 answer
  • What mass of Na2SO4is needed to make 2.5 L of 2.0 Msolution? (Na = 23 g; S = 32 g; O = 16 g)
    13·1 answer
  • Elements found on the left side of the Periodic Table are known as
    15·1 answer
  • Use the periodic table to answer the following questions.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!