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nevsk [136]
3 years ago
7

Starting a fitness plan slowly will lead to better results than starting out quickly TRUE OR FALSE

Chemistry
2 answers:
Lemur [1.5K]3 years ago
6 0
True. Hope that helps!
schepotkina [342]3 years ago
6 0
<span>Starting a fitness plan slowly will lead to better results than starting out quickly TRUE OR FALSE .</span>True
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Select all correct answers.
Jlenok [28]

Answer: It showed that all atoms contain electrons.

Explanation:

  • J.J. Thomson's experiments inside a cathode ray tube in the presence of an electric field showed that all atoms contain tiny negatively charged subatomic particles "electrons".
  • Also, Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."
  • Furthermore, Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny positively-charged nucleus.
  • Then, Rutherford proposed the nuclear model of the atom based on these results.
7 0
3 years ago
The recommended maintenance dose of penicillin for children is 1.0 mg/kg/hr by injection. Of 10 mL of a 25 mg/mL solution of pen
SOVA2 [1]

This problem is providing us with the recommended maintenance dose of penicillin for children as 1.0 mg/kg/hr by injection. Thus, the delivery rate for a 40-pound child is required, if 10 mL of a 25 mg/mL solution of penicillin is added to a 100-mL bottle of saline. At the end, the result is 8.0 mL/hr:

<h3>Dimensional analysis:</h3>

In chemistry, dimensional analysis allows us to obtain a specific result given relevant information about it. Although a formula is not always provided, one can use the units as a reference for the calculations.

For example, this problem asks for the rate, in mL/hr, at which a child gets this dose, so the first step will be to get the mass of the child in kilograms:

40 lb*\frac{0.4536kg}{1lb}= 18.144kg

Next, we calculate the rate at which the penicillin is delivered to this child:

1.0\frac{mg}{kg*hr} *18.144kg=18.144\frac{mg}{hr}

After that, we calculate the total mass of penicillin that is delivered:

10mL*25\frac{mg}{mL} =250 mg

And get the new concentration once it is diluted to 100 mL:

\frac{250mg}{10mL+100mL}=2.27\frac{mg}{mL}

And finally, we combine the mg/hr with the mg/mL to get the result in mL/hr as required:

18.144\frac{mg}{hr} *\frac{1mL}{2.27mg}\\ \\=8.0\frac{mL}{hr}

Learn more about dimensional analysis: brainly.com/question/10874167

5 0
2 years ago
The brightness of a star as seen from Earth is referred to as (.......) brightness. what is the word I can't remember it
m_a_m_a [10]

Answer:

Star's

Explanation:

Stars have their own brightness

3 0
2 years ago
Which of the following statements describes a physical property?
castortr0y [4]


The substance has a higher density than water


8 0
3 years ago
Read 2 more answers
sorry that answer is wrong. A chemical bond is the force that holds together the elements in a compound
olya-2409 [2.1K]
That is a true statement <span />
8 0
3 years ago
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