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3 years ago

Tonsils are lymphatic organs located in the...

Chemistry

1 answer:

mixer [17]3 years ago

3 0

Answer:

C. throat

Explanation:

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SOMEONE PLEASE HELP

Snowcat [4.5K]

Answer:

a. release of heat flames or light - Physical Change

b. formation of precipitate - Chemical Change

c. change in substances size - Physical Change

d. change in an objects shape - Physical Change

e. change in an objects phase of matter - Physical Change

f. releasing gases/bubbles - Chemical Change

Explanation:

These are all either changes in physicality or in chemical structures; hope I helped either way!

6 0

3 years ago

Which is an example of a mixture?

suter [353]

Trail mix becasue it is a mixture of different things

4 0

3 years ago

A potassium hydroxide (KOH) solution has a molar concentration of 0.065 M, calculate the [H3O+], [OH-] and pH of the solution.

Tanya [424]

Answer:

1) [OH⁻] = 0.065 M

2) [H₃O⁺] = 1.54 x 10⁻¹³ M.

3) pH = 12.81.

Explanation:

HCl is completely dissociated yo its ions in solution:

KOH + H₂O → H₃O⁺ + K⁺ + OH⁻,

1) [OH⁻] = 0.065 M.

2) [H₃O⁺]:

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

∴ [H₃O⁺] = 10⁻¹⁴/[OH⁻] = 10⁻¹⁴/(0.065 M) = 1.54 x 10⁻¹³ M.

3) pH:

For strong acids like HCl:

pH = - log[H₃O⁺] = - log[1.54 x 10⁻¹³ M] = 12.81.

4 0

3 years ago

Use Boyle's, Charles's, or Gay-Lussac's law to calculate the missing value in each of the following.

kow [346]

The missing value is found using the Boyle's Law and P2= 1.24 atm

The missing value is found using the Charles 's Law and T1= 171.35

Explanation:

Given data

1. Volume and pressure is given

Based on the data, the volume and pressure is given it requires the Boyle's Law

Boyle's Law:

P1 V1 = P2V2

Given data

V1 = 2.0 L, P1 = 0.62 atm, V2 = 1.0 L, P2 = ?

(0.62 atm)(2.0L)= P2 (1.OL)

Dividing both the sides by 1.0L

we get P2= 1.24 atm

The missing value is found using the Boyle's Law and P2= 1.24 atm

2. A volume and temperature is given:

Charles Law:

V1 / T1 = V2 /T2

Given data

V1 = 230 mL, T1 = ?, V2 = 400. mL, T2 = 298 K

230 ml/ T1= 400 ml/ 298 K

T1 × 400 ml = 68450 ml × K

T1= 171.35

The missing value is found using the Charles 's Law and T1= 171.35

6 0

3 years ago

Şekildeki açık uçlu manometre, Konya' da yapılan bir ölçümü göstermektedir. Bu manometre İzmir ‘de aynı sıcaklıkta, deniz seviye

grin007 [14]

Answer:

nkvchiisjnjhxnejgbdisbrnsjbensihfbe

5 0

3 years ago