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Zielflug [23.3K]
3 years ago
14

If I log out of Brainly and delete the Brainly app from my phone, will my account still be up and active?

Chemistry
1 answer:
Darya [45]3 years ago
4 0
Yes and you can log in to it later as well
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An atom of an alkaline earth metal reacts with another element to form a compound. Which element MOSTLY LIKELY combined with the
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Connect the group to the configuration.pleas help !!
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Explanation:

The group number in the periodic table represents number of valence electrons of the elements in a certain group.

Group 1 : 2,8,1

Group 2 : 2,8,8,2

Group 3 : 2,8,3

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Vinegar is an aqueous solution of acetic acid, ch3cooh. a 5.00 ml sample of a particular vinegar requires 26.90 ml of 0.175 m na
Fed [463]

  The molarity  of  acetic acid in the  vinegar is  0.94 M


 <u><em> calculation</em></u>

Step 1:  write  the balanced equation between CH3COOH  + NaOH

that is CH3COOH   + NaOH  →  CH3COONa  + H2O


step 2 :  find the moles of NaOH

moles  =molarity  x volume in L

volume in liters = 26.90/1000=0.0269 l

moles = 0.175 mol /L x 0.0269 L  =0.0047  moles  of NaOH


Step 3: use the mole  ratio to find moles of CH3COOH

that is the  mole ratio of  CH3COOH: NaOH is 1:1 therefore  the moles of CH3COOH is  =0.0047  moles


Step 4:  find the  molarity  of  CH3COOH

molarity = moles/volume in liters

volume in liter = 5.00/1000 =0.005 l

molarity  is therefore=0.0047 moles/ 0.005 l = 0.94 M

4 0
4 years ago
¿De dónde se originan los rayos alfa, Beta y gamma?
KATRIN_1 [288]
La radiación alfa consiste en núcleos de helio-4 (4He) y es detenida fácilmente por una hoja de papel. La radiación beta, que consiste en electrones, es detenida por una placa de aluminio. La radiación gamma es finalmente absorbida cuando penetra en un material denso.
5 0
3 years ago
Data for the decomposition of hydrogen peroxide at some set temperature T is provided below. The rate law depends only on the co
Viktor [21]

Answer:

0.00442 s^{-1} is the value of the rate constant.

Explanation:

2 H_2O_2\rightarrow 2 H_2O + O_2

Let the order of the reaction be x.

The rate law of the reaction can be written as:

R=k[H_2O_2]^x

1. Rate of the reaction when concentration changes from 0.882 M to 0.697 M in 0 seconds  to 60 seconds.

R=-\frac{0.697 M-0.882 M}{60 s-0 s}=0.00308 M/s

0.00308 M/s=k[0.697 M]^x..[1]

2. Rate of the reaction when concentration changes from  0.697 M to 0.566 M in 240 seconds to 360 seconds.

R=-\frac{0.236M-0.372M}{120s-60 s}=0.00227 M/s

0.00218 M/s=k[0.236 M]^x..[2]

[1] ÷ [2]

\frac{0.00308 M/s}{0.00227 M/s}=\frac{k[0.697 M]^x}{k[0.236M]^x}

Solving fro x:

x = 0.92 ≈ 1

R=k[H_2O_2]^1

0.00308 M/s=k[0.697 M]^1

k=\frac{0.00308 M/s}{[0.697 M]^1}=0.00442 s^{-1}

0.00442 s^{-1} is the value of the rate constant.

5 0
3 years ago
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