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adelina 88 [10]
2 years ago
15

Which of the following is a pure substance?

Chemistry
1 answer:
Mazyrski [523]2 years ago
8 0

Answer:

1. B

2. 100 C

3.  C

4. D

5. D

Explanation:

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How many square centimeters are in an area of 8.50 inch^2
Paha777 [63]

Explanation:

Given parameters:

  Dimension = 8.5in²

we are to convert from in² to cm²

 in² = in x in

 cm² = cm x cm

   1 in = 2.54cm

Using dimensional analysis;

   8.5in² x \frac{2.54cm}{1in}  x \frac{2.54cm}{1in}

        =  54.84cm²

We solved this problem using dimensional analysis where we multiplied the unit with 1.

learn more:

Conversion brainly.com/question/555814

#learnwithBrainly

5 0
3 years ago
Mixture are combination of two or more substances that can be​
ryzh [129]

Answer:

A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids. ... Some mixtures can be separated into their components by using physical (mechanical or thermal) means.

Explanation:

5 0
3 years ago
Match each chemical reaction with the type of reaction that best describes it.
r-ruslan [8.4K]

2 Al + 6 HCl → 2 AlCl₃ + 3 H₂ (single displacement)

Ca + Br₂  → CaBr₂ (synthesis)

4 NH₃ + 5 O₂  → 4 NO + 6 H₂O (combustion)

2 NaCl → 2 Na + Cl₂ (decomposition)

FeS + 2 HCl → FeCl₂ + H₂S (double displacement)

single displacement - is a chemical reaction of the following type: A + BC → AC + B

double displacement - is a chemical reaction of the following type: AB + CD → AC + BD

synthesis - the chemical product is obtained by combining in a synthesis the constituent elements

combustion - usually a exothermic reaction of a particular compound with oxygen

decomposition - degradation of a compound in simpler elements

8 0
3 years ago
How does the phase of water affect its specific heat capacity?
Alex787 [66]

Answer:

C

Explanation

I would guess water vapor because it cant really change form from there unless you split it

8 0
3 years ago
What is a reaction rate?
Kay [80]

Answer:

Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume)

Explanation:

8 0
2 years ago
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