2 years ago

What is the name of this molecule?

Chemistry

1 answer:

mina [271]2 years ago

4 0

D. 1-butyne.

The name of this molecule is 1-butyne.

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A 50.0 mL graduated cylinder has a mass of 65.1 g. When it is filled with an unknown liquid to the 49.3 mL mark, the cylinder an

Delvig [45]

<u>Answer:</u> The density of liquid is $1.12g/cm^3$

<u>Explanation:</u>

We are given:

Mass of cylinder, $m_1$ = 65.1 g

Mass of liquid and cylinder combined, M = 120.5 g

Mass of liquid, $m_2$ = $(M-m_1)=(120.5-65.1)g=55.4g$

To calculate density of a substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

We are given:

Mass of liquid = 55.4 g

Volume of liquid = 49.3 mL = $49.3 cm^3$ (Conversion factor: $1mL=1cm^3$ )

Putting values in above equation, we get:

$\text{Density of liquid}=\frac{55.4g}{49.3cm^3}\\\\\text{Density of liquid}=1.12g/cm^3$

Hence, the density of liquid is $1.12g/cm^3$

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3 years ago

Please help me on #7,9,10

Kay [80]

7=cells
9= The Central Nervous system
10= not sure

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3 years ago

Identify all the examples that support the Law of Conservation of Mass through chemical changes.

wariber [46]

Answer:

Explanation:

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3 years ago

Read 2 more answers

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Vesna [10]

Answer:first D. 88L

Second A 2*10^24

Explanation:

At stp 1 mole = 22.4L

mw Cl2= 70.9

280 g =280/70.9 moles, about 4

4*22.4 = about 88

aw Sr 87.6 —> 6.02214076*10^23 atoms = 1 mole

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3 years ago

Protons + Neutrons = the atomic ?

kolezko [41]

Answer:

The atomic mass number is the number of protons and neutrons in an atom.

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3 years ago