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Harman [31]
3 years ago
15

Which of the following answer choices best describes J. J. Thomson's plum-pudding model?An atom is surrounded by a firm outer sh

ell and contains positively charged particles in its core.An atom is surrounded by a firm outer shell and contains negatively charged particles in its core.An atom consists of positively charged matter that contains negatively charged particles.An atom consists of negatively charged matter that contains positively charged particles.
Chemistry
1 answer:
Misha Larkins [42]3 years ago
6 0

Answer:

C. An atom consists of positively charged matter that contains negatively charged particles.

Explanation:

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You have 363 mL of a 1.25M potassium chloride solution, but you need to make a 0.50M potassium chloride solution. How many milli
maxonik [38]

Answer:- 544.5 mL of water need to be added.

Solution:- It is a dilution problem. The equation used for solving this type of problems is:

M_1V_1=M_2V_2

where, M_1 is initial molarity and  M_2 is the molarity after dilution. Similarly,  V_1 is the volume before dilution and  V_2 is the volume after dilution.

Let's plug in the values in the equation:

1.25M(363mL)=0.50M(V_2)

V_2=\frac{1.25M(363mL)}{0.50M}

V_2=907.5mL

Volume of water added = 907.5mL - 363mL  = 544.5 mL

So, 544.5 mL of water are need to be added to the original solution for dilution.

3 0
3 years ago
What is the density of a book that weighs 550 grams and has a volume of 0.5 liters
Oksi-84 [34.3K]

Answer:

1.1gcm^-3

Explanation:

density \:  =  \frac{mass}{volume}

0.5l = 0.5*1000

= 500cm^3

Density = 550/500

Density =

{1.1gcm}^{ - 3}

4 0
2 years ago
Magnesium is the limiting reactant in this experiment. Calculate the theoretical yield of MgO for each trial.
liq [111]

/watch?v=DLzxrzFCyOs

6 0
3 years ago
What are some of the uses of halogens?​
BartSMP [9]

Answer:

Halogens are used in, water and sanitation, plastics, pharmaceutical, pulp and paper, textile, military and oil industries. Bromine, chlorine, fluorine and iodine are chemical intermediates( bleaching agents and disinfectants). Chlorine is used to purify water. Chlorine also is part of salt, sodium chloride, which is one of the most widely used chemical compounds. Fluorine is used in fluorides, which are added to water supplies to prevent tooth decay.

hopes this helps~

8 0
3 years ago
Read 2 more answers
What is the name of this molecule?
Daniel [21]
It is a linear chain.

It has one double bond, so it is an alkene

It has 9 carbon atoms, so it is a nonene.

Number the carbons so that the double bond is the closer to the first carbon.

As the double bond is in the first carbon, you name it 1-nonene.

Answer: 1-nonene
6 0
3 years ago
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