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
earnstyle [38]
3 years ago
15

Question 1 (1 point)

Chemistry
1 answer:
Aneli [31]3 years ago
6 0

Answer:

Question 1. Solubility

Question 2. 18%

Question 3. 60%

Explanation:

Question 1.

Molarity and mass percent are both, sort of concentrations for solutions.

They involve the amount of solute respect to the solution.

Solubility is the ability of a substance to dissolve in another. This capacity can be expressed in moles per liter.

Question 2.

Percent concentration which is also the same as mass percent, shows the mass of solute in 100 g of solution.

In this case, for 18 g of salt which are contained in 100 g of solution, the percent concentration is 18%

Question 3.

Solute: 45 g of sugar

Solvent: 30 g of water

Solution: 75 g of solution

Percent sugar in the solution → (45 g / 75g) . 100 = 60%

You might be interested in
The reaction C4H8(g)⟶2C2H4(g) C4H8(g)⟶2C2H4(g) has an activation energy of 262 kJ/mol.262 kJ/mol. At 600.0 K,600.0 K, the rate c
crimeas [40]

Answer : The rate constant at 785.0 K is, 1.45\times 10^{-2}s^{-1}

Explanation :

According to the Arrhenius equation,

K=A\times e^{\frac{-Ea}{RT}}

or,

\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_1 = rate constant at 600.0K = 6.1\times 10^{-8}s^{-1}

K_2 = rate constant at 785.0K = ?

Ea = activation energy for the reaction = 262 kJ/mole = 262000 J/mole

R = gas constant = 8.314 J/mole.K

T_1 = initial temperature = 600.0K

T_2 = final temperature = 785.0K

Now put all the given values in this formula, we get:

\log (\frac{K_2}{6.1\times 10^{-8}s^{-1}})=\frac{262000J/mole}{2.303\times 8.314J/mole.K}[\frac{1}{600.0K}-\frac{1}{785.0K}]

K_2=1.45\times 10^{-2}s^{-1}

Therefore, the rate constant at 785.0 K is, 1.45\times 10^{-2}s^{-1}

7 0
3 years ago
Explain why saltwater is considered a mixture
lutik1710 [3]
Because it is a mix of H2O (water) and NaCl (salt)
3 0
3 years ago
Read 2 more answers
Which of the following has the electron configuration [ar] 4s23d5 ?
nignag [31]

Answer:

Mn Manganese

Explanation:

5 0
3 years ago
An atom has 25 protons,20 neutrons, and 19 electrons.Which atom is this,What is the atom's mass number?
ladessa [460]
The atomic mass is 45
6 0
3 years ago
Read 2 more answers
The equilibrium constant, Kc, for the following reaction is 1.29E-2 at 600 K. COCl2(g) CO(g) Cl2(g) Calculate the equilibrium co
RSB [31]

Answer:

At Equilibrium

[COCl₂] = 0.226 M

[CO] = 0.054 M

[Cl₂] = 0.054 M

Explanation:

Given that;

equilibrium constant Kc = 1.29 × 10⁻² at 600k

the equilibrium concentrations of reactant and products = ?

when 0.280 moles of COCl2(g) are introduced into a 1.00 L vessel at 600 K. [COCl²]

Concentration of  COCl₂ = 0.280 / 1.00 = 0.280 M

COCl₂(g) ---------->  CO(g)   +  Cl₂(g)

0.280                      0                0  ------------ Initial

-x                             x                 x

(0.280 - x)               x                 x   ----------- equilibrium

we know that; solid does not take part in equilibrium constant expression

so

KC = [CO][Cl₂] / COCl₂

we substitute

1.29 × 10⁻² = x² / (0.280 - x)

0.0129 (0.280 - x) = x²

x² = 0.003612 - 0.0129x

x² + 0.0129x - 0.003612 = 0

x = -b±√(b² - 4ac) / 2a

we substitute

x = [-(0.0129)±√((0.0129)² - 4×1×(-0.003612))] / [2 × 1 ]

x = [-0.0129 ± √( 0.00017 + 0.01445)] / 2

x = [-0.0129 ± 0.1209] / 2

Acceptable value of x =[ -0.0129 + 0.1209] / 2

x = 0.108 / 2

x = 0.054

At equilibrium

[COCl₂] = (0.280 - x) = 0.280 - 0.054 = 0.226 M

[CO] = 0.054 M

[Cl₂] = 0.054 M

7 0
3 years ago
Other questions:
  • A study of the decomposition reaction 3RS2  3R + 6S yields the following initial rate dat
    6·1 answer
  • Identify the precipitation reaction in the set?
    15·1 answer
  • Use standard reduction potentials to find the equilibrium constant for the following reaction at 25°C: 2Ce4+(aq) + 2Cl−(aq) ⇌ 2C
    10·1 answer
  • Groundwater in Pherric, New Mexico, initially contains 1.800 mg/L of iron as Fe3+. What must the pH be raised to in order to pre
    5·1 answer
  • A scuba diver 25.0m below the sea surface inhales 75.0mL of compressed air in a scuba tank at a pressure of 3.50atm and a temper
    12·1 answer
  • As part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedur
    10·2 answers
  • This type of thermometer relies on a liquid to contract will colder and expand when warmed. A)infrared B)thermistor
    13·1 answer
  • Halons contain halogens, which are highly reactive with oxygen. true or false
    15·2 answers
  • Which form of energy can be connected closely to climate change?
    12·1 answer
  • Im so alone and i really need friends and maybe more pls dont delete my quiestion
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!