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
ratelena [41]
3 years ago
6

What is a definition for ergonomics?

Chemistry
2 answers:
Serhud [2]3 years ago
5 0

Answer:

the study of people's efficiency in their working environment.

Explanation: Why couldn't you just look it up or Merriam Webster or a dictionary but here's your answer

lana [24]3 years ago
3 0
The study of people's efficiency in their working environment.
You might be interested in
Pretty Pudgey.. can i get a owaowa?
love history [14]

Answer:

owaowa

Explanation:

6 0
3 years ago
Read 2 more answers
  A solution is made by dissolving 20 ml of acetic acid in 180ml of water. Calculate its volume concentration​
inn [45]

Answer:

water is 9/10

chemical would be 1/10

Explanation:

180/200 would be water concentration in solution

and 20/200 would be chemical solution concentration in solution (if the chemical were to be polar and mix)

8 0
3 years ago
Which substance loses electrons in a chemical reaction
Ierofanga [76]

Answer:

Explanation:

Reducing agent

Reducing agent is an element or compound that loses or donates an electron to another chemical species in a redox chemical reaction. Since the reducing agent is losing electrons,it is said to have been oxidized.

8 0
3 years ago
Given the reaction: H2O2(l) ⇌ H2(g) + O2(g) The forward reaction is endothermic. Determine which of the following changes would
taurus [48]

Answer:

Option(II) and option (IV) are correct.

Explanation:

Here products are H_{2} and O_{2} and reactant is H_{2}O_{2}

(I) According to Le-chatelier principle,increase in H_{2}  will shift the equilibrium towards reactant side to keep the equilibrium constant unchanged.

(II) According to Le-chatelier principle,decrease in O_{2}  will shift the equilibrium towards product side to keep the equilibrium constant unchanged.

(III) Adding a catalyst will not change position of equilibrium. Catalyst only helps to achieve equilibrium in a lesser time.

(IV) As this reaction is an endothermic reaction therefore heat is consumed in formation of product. Therefore increase in temperature will lead to formation of more product to consume excess heat added.

(V) Pure solids and liquids do not affect position of equilibrium as their concentrations remain unchanged.

4 0
3 years ago
What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to which 0.150 mol of HCl were
irinina [24]

Answer:

pH = 2.21

Explanation:

Hello there!

In this case, according to the reaction between NaF and HCl as the latter is added to the buffer:

NaF+HCl\rightarrow NaCl+HF

It is possible for us to see how more HF is formed as HCl is added and therefore, the capacity of this HF/NaF-buffer is diminished as it turns acid. Therefore, it turns out feasible for us to calculate the consumed moles of NaF and the produced moles of HF due to the change in moles induced by HCl:

n_{HF}^{new}=0.300mol+0.150mol=0.450mol\\\\n_{NaF}^{new}=0.200mol-0.150mol=0.050mol

Next, we calculate the resulting concentrations to further apply the Henderson-Hasselbach equation:

[HF]=\frac{0.450mol}{1.0L} =0.450M

[NaF]=\frac{0.050mol}{1.0L} =0.050M

Now, calculated the pKa of HF:

pKa=-log(6.8x10^{-4})=3.17

We can proceed to the HH equation:

pH=pKa+log(\frac{[NaF]}{[HF]} )\\\\pH=3.17+log(\frac{0.05M}{0.45M} )\\\\pH=2.21

Best regards!

6 0
3 years ago
Other questions:
  • To test the quality of water sources in her area, Shameka collects five samples from each water source and tests the quality of
    7·1 answer
  • What is the definition of a chemical bond
    7·1 answer
  • If a ballon at 3.4 atm at 301k, what is the pressure when cooled to 212k
    10·1 answer
  • What is the pH of the lye in soap ?
    8·2 answers
  • Which refers to the type of chemical bond that involves the transfer of electrons between atoms? O metallic O polar covalent Oio
    7·2 answers
  • Humans could try to pollinate food crops by hand, but this would be expensive and time consuming. Natural pollinators, like bees
    7·1 answer
  • What is the change in energy of an atom if the wavelength of the photon absorbed by the atom is equal to 4.64 x 10-7 meters? (Pl
    8·2 answers
  • When 21.45 g of KNO3 was dissolved in water in a calorimeter, the temperature fell from 25.00°C to 14.14 °C. If the heat capacit
    7·1 answer
  • What are the resonance structures of the<br>carbonate (CO32-) ion?​
    9·1 answer
  • A gas occupies 12.3 litres at pressure of 40 cm of Hg. What is the volume in ml when the pressure is increased to 600 mm of Hg a
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!