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
ValentinkaMS [17]
3 years ago
15

Equivalent massof sodium​

Chemistry
1 answer:
andre [41]3 years ago
8 0

Answer:

Sodium

Formula : Na

Equivalent mass:23.0

Mark me as Branliest

You might be interested in
3. A 31.2-g piece of silver (s = 0.237 J/(g · °C)), initially at 277.2°C, is added to 185.8 g of a liquid, initially at 24.4°C,
VARVARA [1.3K]

Answer:

Cp_{liquid}=2.54\frac{J}{g\°C}

Explanation:

Hello,

In this case, since silver is initially hot as it cools down, the heat it loses is gained by the liquid, which can be thermodynamically represented by:

Q_{Ag}=-Q_{liquid}

That in terms of the heat capacities, masses and temperature changes turns out:

m_{Ag}Cp_{Ag}(T_2-T_{Ag})=-m_{liquid}Cp_{liquid}(T_2-T_{liquid})

Since no phase change is happening. Thus, solving for the heat capacity of the liquid we obtain:

Cp_{liquid}=\frac{m_{Ag}Cp_{Ag}(T_2-T_{Ag})}{-m_{liquid}(T_2-T_{liquid})} \\\\Cp_{liquid}=\frac{31.2g*0.237\frac{J}{g\°C}*(28.3-227.2)\°C}{185.8g*(28.3-24.4)\°C}\\ \\Cp_{liquid}=2.54\frac{J}{g\°C}

Best regards.

6 0
3 years ago
You need to prepare 1 L of the citric acid/citrate buffer. You have chosen to use Method 1 (see lab presentation). Calculate the
prisoha [69]

Answer:

3.11 is the pH of the buffer

Explanation:

The pH of a buffer is obtained using H-H equation:

pH = pKa + log [Conjugate base] / [Weak acid]

<em>Where pH is the pH of the buffer, pKa = -log Ka = 3.14 for the citric buffer and [] could be taken as the moles of each species.</em>

The citric acid,HX (Weak acid), reacts with NaOH to produce sodium citrate, NaX (weak base) and water:

HX + NaOH → H2O + NaX

That means the moles of NaOH added = Moles of sodium citrate produced

And the resulitng moles of HX = Initial moles - Moles NaOH added

<em>Moles HX and NaX:</em>

Moles NaOH = 0.100L * (0.65mol / L) = 0.065 moles NaOH = Moles NaX

Moles HX = 0.300L * (0.45mol / L) = 0.135 moles HX - 0.065 moles NaOH = 0.070 moles HX

Replacing in H-H equation:

pH = 3.14 + log [0.065mol] / [0.070mol]

pH = 3.11 is the pH of the buffer

8 0
3 years ago
Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecul
Helen [10]
C
Carbon and its compound's stability means it is useful in synthesizing organic molecules which are used in the bodies of organisms.
6 0
3 years ago
Read 2 more answers
Is always
Studentka2010 [4]

Answer:

o atom, smaller, anion is the right answer of the following

7 0
3 years ago
Someone Please HELP Me
scoray [572]
Use a calculator to add those thank you ur welcome
7 0
3 years ago
Other questions:
  • Which of these scenarios involve a reaction that is at equilibrium
    14·2 answers
  • Pls answer
    6·1 answer
  • key A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration o
    8·2 answers
  • Factors that limit a technological design are called constrains. But why?
    10·1 answer
  • The atomic number of nitrogen is 7. The mass is 14.01. This means that a) All nitrogen atoms have exactly 7 neutrons b) A small
    15·2 answers
  • Bored fr so so bored anyone at all wanna hang only if your from14-16
    13·2 answers
  • What causes these H-bonds to form?
    15·1 answer
  • Which statement is true of the rock cycle?
    8·2 answers
  • Tyrone mixes some chemicals together. He notices that the mixture gives off heat and is hot to touch. What type of reaction is t
    13·1 answer
  • What are some characteristic properties of elements to the left of the elements along the ""staircase""? To the right?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!