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Luda [366]
3 years ago
7

C15H28 is the formula of

Chemistry
1 answer:
Olegator [25]3 years ago
5 0
Cyclopentadecene is it
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What is the coefficient for this formula? 9 NaCl2 A. 11 B. 9 C. 2 D. 1
KATRIN_1 [288]

Answer:

B. 9

Explanation:

The formula of the compound is given as:

            9NaCl

Coefficient is the number before the compound. The compound here is made up of sodium and chlorine.

Therefore, we have 9 as the coefficient and it is 9 moles of NaCl.

  • The compound have 1 atoms of Na
  • Also 1 atom of Cl

Note, NaCl is an ionic compound.

5 0
2 years ago
Calculate freeze 62.9 g of iron at 1535oC<br> Hf (J/g)=257
Inessa [10]

Answer:

<u>-16200J</u>

Explanation:

(257J/g)(62.9g)

eliminate the variables

u get 16165.3

go to 3 significant digits

u get 16200

and since it is freezing we are taking out energy so it would be

-16200J

4 0
3 years ago
Which of the following substances is most likely to be a liquid at room temperature?
nikitadnepr [17]

Answer:

The correct answer is d.hydrogen peroxide H₂O₂H₂O₂

Explanation:

Substances can be found in nature in different <em>aggregation states. </em>

Agreggation states can be liquid, gas or solid.

The problem asks about which substance can be found in room temperature as <em>liquid.</em> Each subtances has different physical and chemical properties that determines in which state you can find them at room temperature.

Hydrogen peroxide is the only substance listed that is in liquid state at room temperature, all other substances are in gas state at room temperature.

3 0
3 years ago
Which of the following is a compound?<br> a. iron<br> b. lead<br> c. helium<br> d. methane
Lana71 [14]
The correct answer is d) methane (CH_4)

The other options are elements.
6 0
3 years ago
I'll give brainliest
ss7ja [257]

Answer:

b,d,f

Explanation:your welcome give brainilest

8 0
2 years ago
Read 2 more answers
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