How would you know if you were eating something with a high alkaline level?

The rate constant for a particular zero-order reaction is 0.075 M s-1. If the initial concentration of reactant is 0.537 M it ta

Phoenix [80]

Answer : It takes time for the concentration to decrease to 0.100 M is, 22.4 s

Explanation :

Formula used to calculate the rate constant for zero order reaction.

The expression used is:

$\ln [A]=-kt+\ln [A_o]$

where,

$[A_o]$ = initial concentration = 0.537 M

$[A]$ = final concentration = 0.100 M

t = time = ?

k = rate constant = 0.075 M/s

Now put all the given values in the above expression, we get:

$\ln (0.100)=-0.075\times t+\ln (0.537)$

$t=22.4s$

Therefore, it takes time for the concentration to decrease to 0.100 M is, 22.4 s

6 0

3 years ago

Use the drop-down menus to identify the electromagnetic waves.

mezya [45]

Answer:

Label A - Radio waves

Label C - Infrared

Label D - Visible light

Label G- Gamma rays

Explanation:

Electromagnetic spectrum is an arrangement of electromagnetic waves in order of their varying frequencies and wavelengths,
Radiowaves have the highest wavelength and lowest frequency while the gamma rays have the lowest wavelength and the highest frequency.
In order of increasing wavelength and decreasing frequency the electromagnetic waves are; Gamma rays, X-rays, U.V light, Visible light, infrared waves, microwaves, and Radio waves.

6 0

3 years ago

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Explain how scientific knowledge and reasoning can help us make difficult decisions.

ch4aika [34]

<span> Scientific reasoning consists of observation, forming a workable hypothesis and arriving at a conclusion. Almost without exception major scientific discoveries were made and are being made today based on these same precepts. It only seems logical when an individual makes a difficult decision he/she will apply all or part of these processes. Let;s say that you want to make someone;s acquaintance to possibly become serious. Certainly, you would begin by quietly observing them, then you might make a hypothesis, "This person might make a good companion for me." Then in your conclusion you would test your hypothesis and proceed as directed. THis may be a bit simplistic, and I hope that it helps.</span>

3 0

3 years ago

Explain step by step, please!

konstantin123 [22]

Answer:

10. Stacey

11. 7.86 g/cm^3 (3dp)

OR 786 kg/m^3 (SI units)

Explanation:

10. The correct exact answer for 10 is 26.169 (6.71x3.9). While Sam was correct in the precision of the number (2dp just like the given measurements), he was incorrect in the number itself. While Stacy's number was not as precise as Sam's (0dp), it is correctly rounded to the nearest whole number, therefore Stacy is correct.

11. The formula for density is mass/volume. The mass here is 264g and the volume is 33.6ml, therefore the density is 7.86 (3 sig figs because given values had 3) g/cm^3, because the mass was given in grams and 1ml = 1cm^3. Converted to SI units it is 786 kg/m^3.

Hope this helped!

4 0

3 years ago

Two people are trying to push a large box across a floor. Each person pushes with an equal amount of force. The total amount of

Charra [1.4K]

Answer:

C- 250+250= 500 newtons (the amount the both exerted) :)

Explanation:

5 0

3 years ago

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