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Bezzdna [24]
3 years ago
10

Chemical equations

Chemistry
2 answers:
Alenkasestr [34]3 years ago
7 0

I believe it is B writing chemical formulas

Yuki888 [10]3 years ago
4 0

chemical equations: describe chemical reactions

Answer: a

I think this is the answer

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Explain why we experience seasons. *
REY [17]

Answer:

Seasons occur because Earth is tilted on its axis relative to the orbital plane, the invisible, flat disc where most objects in the solar system orbit the sun. ... In June, when the Northern Hemisphere is tilted toward the sun, the sun's rays hit it for a greater part of the day than in winter.

4 0
3 years ago
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Which is a common psychological side effect of dementia?
lapo4ka [179]
D. Loss of coordination
5 0
3 years ago
You need to prepare 150 mL of 0.1 M solution of silver chloride. How much silver chloride is required?
Rudiy27

Answer:

amount of silver chloride required is 0.015 moles or 2.1504 g

Explanation:

0.1M AgCL means 0.1mol/dm³ or 0.1mol/L

1L = 1000mL

if 0.1mol of AgCl is contained in 1000mL of solution

then x will be contained in 150mL of solution

cross multiply to find x

x = (0.1*150)/1000

x= 0.015 moles

moles of silver chloride present in 150 mL of solution is 0.15 moles

To convert this to grams, simply multiply this value by the molar mass of silver chloride

molar mass of silver chloride AgCl =107.86 + 35.5

                                                     =143.36 g/mol

mass of AgCl = moles *molar mass

                       =0.015*143.36

                        =2.1504g

                        =

4 0
3 years ago
W = m·g is a form of Newton's ______ Law.<br><br> A)first<br><br> B)second<br><br> C) third
tatuchka [14]

Answer:

B. Second

Explanation:

It is the Law of Motion

3 0
3 years ago
A sample of carbon tetrachloride (CCI) contains 3 moles of the substance. How many atoms are there in the sample?
STALIN [3.7K]

Answer:

Number of atoms =1.806×10²⁴

Explanation:

You have the number of moles of Carbon tetrachloride which is n=3

And you are looking for number of atoms that are in the sample, which are represented by the letter "N"

The formula that has both number of moles(n) and number of atoms(N) is written as n=N/Na

Na is called the Avogadros number and it is equal to 6.08×10²³, it never changes(it is a constant)

So you will substitute the number of moles and the avogadros number to you formula, and the only unknown will be the number of atoms which you are looking for

  • n=N/Na
  • 3=N(6.02×10²³)
  • N=1.806×10²⁴ atoms of CCl

NB: N does not represent the number of atoms only. It may also represent the number of particles or molecules...

3 0
3 years ago
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