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
yulyashka [42]
3 years ago
7

Independent variable ​

Chemistry
1 answer:
katrin [286]3 years ago
6 0

Answer:

Independent variable

aluminium ball

You might be interested in
A runner competed in a 5-mile run. How many yards did she run?
vfiekz [6]
5 miles are equivalent to 8,800 yards

so b. is the correct answer. plz like and hope it helped
3 0
3 years ago
25.0cm3 of s saturated potassium hydroxide is neutralized by 35.0cm3 of hydrogen chloride acid of concentration 0.75 mol/dm3. Ca
Kamila [148]

Answer:

Concentration of the original \rm KOH solution: approximately 1.05\; \rm mol \cdot dm^{-3}.

Explanation:

Notice that the concentration of the \rm HCl solution is in the unit \rm mol\cdot dm^{-3}. However, the unit of the two volumes is \rm cm^{3}. Convert the unit of the two volumes to \rm dm^{3} to match the unit of concentration.

\begin{aligned} V(\mathrm{NaOH}) &= 25.0\; \rm cm^{3} \\ &= 25.0\; \rm cm^{3} \times \frac{1\; \rm dm^{3}}{1000\; \rm cm^{3}} \approx 0.0250\; \rm dm^{3} \end{aligned}.

\begin{aligned} V(\mathrm{HCl}) &= 35.0\; \rm cm^{3} \\ &= 35.0\; \rm cm^{3} \times \frac{1\; \rm dm^{3}}{1000\; \rm cm^{3}} \approx 0.0350\; \rm dm^{3} \end{aligned}.

Calculate the number of moles of \rm HCl molecules in that 0.0350\; \rm dm^{3} of 0.75\; \rm mol \cdot dm^{3} \rm HCl\! solution:

\begin{aligned}n(\mathrm{HCl}) &= c(\mathrm{HCl}) \cdot V(\mathrm{HCl}) \\ &= 0.00350\; \rm dm^{3} \times 0.75\; \rm mol \cdot dm^{3} \\ &\approx 0.02625\; \rm mol\end{aligned}.

\rm HCl is a monoprotic acid. In other words, each \rm HCl\! would release up to one proton \rm H^{+}.

On the other hand, \rm KOH is a monoprotic base. Each \rm KOH\! formula unit would react with up to one \rm H^{+}.

Hence, \rm HCl molecules and \rm KOH\! formula units would react at a one-to-one ratio.

{\rm HCl}\, (aq) + {\rm NaOH}\, (aq) \to {\rm NaCl}\, (aq) + {\rm H_2O}\, (l).

Therefore, that 0.02625\; \rm mol of \rm HCl molecules would neutralize exactly the same number of \rm NaOH formula units. That is: n(\mathrm{NaOH}) = 0.02625\; \rm mol.

Calculate the concentration of a \rm NaOH solution where V(\mathrm{NaOH}) = 0.0250\; \rm dm^{3} and n(\mathrm{NaOH}) = 0.02625\; \rm mol:

\begin{aligned}c(\mathrm{NaOH}) &= \frac{n(\mathrm{NaOH})}{V(\mathrm{NaOH})} \\ &= \frac{0.02625\; \rm mol}{0.0250\; \rm dm^{3}}\approx 1.05\; \rm mol \cdot dm^{-3}\end{aligned}.

7 0
3 years ago
What is the Kelvin temperature for 30°C? 130 K 30 K 273 K 293 K 303 K
pishuonlain [190]

The answer is 303 K, to find K you have to add 273 to the °C

8 0
3 years ago
Calculate the amounts requested if 3.30 mol Fe2O3 completely react according to the following equation. Fe2O3 + 2Al --> 2Fe +
Natalija [7]
The answer would be : B
4 0
3 years ago
Determine the number of protons, electron and neutrons present in an atom of magnesium
Elena L [17]
Protons= 12, Electrons= 12, neutrons= 12
5 0
3 years ago
Other questions:
  • What type of chemical reaction is NH3
    14·1 answer
  • What is stp? provide an answer using at least two different units of pressure and complete sentences?
    8·1 answer
  • What is the first step in the scientific method? A. form a hypothesis B. illustrate the process C. observe and ask questions D.
    13·2 answers
  • Which type of reaction is Mg + S → MgS?
    12·2 answers
  • You apply 100.0 of force to a machine. The machine applies 20.0 N of force to the load. What is the mechanical advantage of the
    11·1 answer
  • HELP ASAP!!!
    8·1 answer
  • 1 Produce a time line for the formation of the atmosphere,
    11·1 answer
  • Question 1 (1 point)<br> ROOTS--What is NOT a root function in plants?
    12·1 answer
  • Do equal volumes of the same gas at the same temperature and pressure contain equal numbers of molecules (number of moles)?
    7·1 answer
  • Multicellular organisms are organized into tissues, organs, and organ systems.TRUE OR FALSE​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!