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dybincka [34]
3 years ago
12

Which of the following is true about the differences between the "Plum Pudding" model and Rutherford's model? There are two poss

ible answers.
A. Both models describe food.

B. The plum pudding model had no deflection of particles because it lacked a nucleus

C. Rutherford's model showed deflection of particles because the nucleus has positive and neutral particles.

D. The plum pudding model and Rutherford's model are the same
Chemistry
1 answer:
Ugo [173]3 years ago
7 0
I think it is the letter A because they both Make sense
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With 21 g of Zinc, and 7 g of CuCl2, how much ZnCl2 is made in grams?
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Answer: 7.07 grams

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}    

\text{Moles of} zinc=\frac{21g}{65g/mol}=0.32moles

\text{Moles of} CuCl_2=\frac{7g}{134g/mol}=0.052moles

Zn+CuCl_2\rightarrow Cu+ZnCl_2

According to stoichiometry :

1 mole of CuCl_2 require 1 mole of Zn

Thus 0.052 moles of CuCl_2 will require=\frac{1}{1}\times 0.052=0.052moles  of Zn

Thus CuCl_2 is the limiting reagent as it limits the formation of product and Zn is the excess reagent.

As 1 mole of CuCl_2 give = 1 mole of ZnCl_2

Thus 0.052 moles of CuCl_2 give =\frac{1}{1}\times 0.052=0.052moles  of ZnCl_2

Mass of ZnCl_2=moles\times {\text {Molar mass}}=0.052moles\times 136g/mol=7.07g

Thus 7.07 g of ZnCl_2 will be produced from the given masses of both reactants.

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What visible changes, in addition to precipitate formation, show that cations and anions have rearranged to form new products?
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Explanation:

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Because single-subject experiments typically involve few participants, there are concerns regarding the __________________ of th
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There are questions about the external validity of the results because single-subject experiments frequently only involve a small number of subjects.

<h3>What is experimentation with a single subject?</h3>

A type of quantitative research known as single-subject studies includes closely examining each participant's behavior in a small sample size. It should be noted that the phrase "single-subject" does not necessarily suggest that only one participant is being examined; rather, it usually refers to a group of two to ten.

<h3>What does a single-subject research design aim to achieve?</h3>

Single subject research design is a sort of research methodology that involves monitoring a single phenomena repeatedly over time (often a behavior), and it is typically used to test interventions.

<h3>What features distinguish single-subject studies?</h3>

Changes on the DV can be measured using data gathered before, during, and after the intervention.

learn more about single-subject experiments here

<u>brainly.com/question/13009400</u>

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