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kobusy [5.1K]
2 years ago
6

HELP PLS important plsssssssssssssssss

Chemistry
1 answer:
prohojiy [21]2 years ago
6 0

Answer: All have something wrong with them!!!

Explanation: #1: He is using chemicals without using any goggles or protection

#2: She is unsupervised while around fire as well as no protection

#3:

#4: There are many flammable things around the fire especially since its paper it could start a major fire

#5: Again has no protection (goggles. gloves, e.t.c.) and putting chemicals close to your face is just a Don't in science

#6: They are "horseplaying" and also someone else is doing all the work

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Describe the location of the negative charges of the atom in j.j thompsons plum pudding model
iren2701 [21]

The location of the negative charges is evenly distributed throughout the entire atom.

J. J. Tomson concluded that atoms are divisible and that the corpuscles are their building blocks.

Atoms are made up of smaller particles.

J. J. Thomson discovered the electron ( the negative charges of the atom) in 1897.

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge and evenly distributed throughout the entire atom.

With this model, he abandoned his earlier hypothesis that the atom was composed of immaterial vortices.

Later, Rutherford demonstrate that J.J Thompson's Plum Pudding model was not accurate.

More info about Thomson’s plum pudding model: brainly.com/question/6319700

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6 0
2 years ago
What volume of H2O is formed at stp when 6.0g of Al is treated with excess NaOH?
Ne4ueva [31]

Answer : The volume of H_2O is 14.784 L.

Solution : Given,

Mass of Aluminium = 6 g

Molar mass of Aluminium = 27 g/mole

First we have to calculate the moles of aluminium.

Moles of Al = \frac{\text{ Given mass of Al}}{\text{ Molar mass of Al}}=\frac{6g}{27g/mole}=0.22moles

The given balanced reaction is,

2NaOH+2Al+6H_2O\rightarrow 2NaAl(OH)_4+3H_2

From the reaction, we conclude that

2 moles of Al react with the 6 moles of H_2O

0.22 moles of Al react with \frac{6}{2}\times 0.22=0.66moles of H_2O

At STP,  1 mole contains 22.4 L volume

As, 1 mole of H_2O contains 22.4 L volume of H_2O

0.66 moles of H_2O contains (22.4)\times (0.66)=14.784L volume of H_2O

Therefore, the volume of H_2O is 14.784 L.                                                                                        

8 0
3 years ago
I need 2 examples of chemical and physical change. *15 points
melamori03 [73]
*Chemical: Burning of paper and log of wood. - Digestion of food. - Boiling an egg. - Chemical battery usage. - Electroplating a metal. - Baking a cake. - Milk going sour.

*Physical: An ice cube melting into water in your drink. - Freezing water to make ice cubes. - Boiling water evaporating. - Hot shower water turning to steam. - Steam from the shower condensing on a mirror.
3 0
3 years ago
I need to know the answer to that
Tresset [83]

im not sure which one to answer, and i can hardly see the text.

8 0
3 years ago
Help please! asap!
Harrizon [31]

Answer:A

Explanation:

4 0
3 years ago
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