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
mafiozo [28]
3 years ago
13

How to measure a bag of flour

Chemistry
1 answer:
ad-work [718]3 years ago
6 0
A bag of flour may reasonably be measured in either grams or kilograms depending on size. A small bag in a supermarket may be 500 grams. A larger bag may be 1-3 kg. Bags of flour direct from a mill may be much larger (25 kg).

A kilogram is roughly 2.2 pounds. That should be enough flour.
You might be interested in
You are managing a city that needs to upgrade its disinfection basin at your 40 MGD surface water drinking water treatment plant
nignag [31]

Solution :

According to Chick's law

$\frac{N_t}{N_0}=e^{-k'C^n t}$

where, t = contact time

            c = concentration of disinfectant

            k' = lethality coefficient = 4.71

            n = dilution coefficient = 1

            4 log removal = % removal = 99.99

$\frac{N_t}{N_0}=\frac{\text{bacteria remaining}}{\text{bacteria initailly present}}$

      = 1 - R

      = 1 - 0.9999

Now for plug flow reactor contact time,

$\tau =\frac{V}{Q} =\frac{75000}{40 \times 10^6}$

          = 0.01875 days

          = 27 minutes

For CSTR, $\tau =\frac{V}{Q} =\frac{150000}{40 \times 10^6}$

                             $=3.75 \times 10^{-3}$ days

                            = 5.4 minute

There are 3 reactors, hence total contact time = 3 x 5.4

                                                                            = 16.2 minute

Or $\frac{N_t}{N_0}=e^{-k'C^n t}$

or $(1-0.9999)=e^{-4.71 \times C \times t}$

∴ C x t = 1.955

For PFR, $t_1 = 27 $ min

∴ C $=\frac{1.955}{27}$ = 0.072 mg/L

For CSIR, $t_2=16.2$ min

$C=\frac{1.955}{16.2} = 0.1206$ mg/L

∴ Chlorine required for PFR in kg/day

$=\frac{0.072 \times 40 \times 10^6 \times 3.785}{10^6}$      (1 gallon = 3.785 L)

= 18.25 kg/day

Therefore we should go for PFR system.

3 0
3 years ago
Why is photosynthesis an example of chemical change, and why is it classified as endothermic?
Alexeev081 [22]

Answer:

It is an example of chemical reaction because carbon dioxide and water are converted into glucose and oxygen. If that makes any sense.  and it is classified as endothermic because it requires the input of energy in the form of solar energy.

Explanation:

3 0
3 years ago
What is the relationship between Celsius and kelvin
Inga [223]

The relationship between Celsius and kelvin is that degrees Kelvin is equal to degrees Celsius + 273.15. That means that the freezing point of water (0°C) is 273.15° kelvin. This makes an additive relationship between the two quantities, so quantities such as the boiling point and freezing point of water are the same distance apart on the Kelvin scale (100 degrees). This means that kelvin has the same magnitude as Celsius.

4 0
3 years ago
Identify the neutralization reaction
KIM [24]
In chemistry, neutralization or neutralisation (see spelling differences) is a chemical reaction in which an acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.
5 0
3 years ago
Which of the following vertebrates evolved in the Carboniferous period?
topjm [15]
Reptiles arose during the Carboniferous period. Therefore making the answer Reptiles
6 0
3 years ago
Read 2 more answers
Other questions:
  • Why does a hot water bottle feel warm? Options: Molecules in the hot water bottle are moving faster than molecules in the skin.
    8·2 answers
  • Air has a lower specific heat then water once the sun goes down will the air or the water cool faster? What is the independent a
    12·1 answer
  • Why wasn't oxidation type chemical weathering common more than 2 billion years ago?
    15·1 answer
  • the density of oxygen 1.43 gm/liter at 0°c and pressure 1.0 atm. if a 20 liter cylinder is filled with oxygen at pressure of 25
    9·1 answer
  • Order the structures from smallest to largest. Chloroplast Leaf Glucose molecule Cell Water molecule ​
    9·1 answer
  • What types of energy are involved in a chemical reaction?
    13·1 answer
  • Write the overall balanced equation for the reaction:<br><br> N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)
    10·1 answer
  • When coal is burned to produce electricity, the electrical energy produced is less than the
    13·1 answer
  • Balance the following equation<br> mg(s)+ HCl H2)g)+MgCl2
    13·1 answer
  • The results of an experiment is the:
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!