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3 years ago

What is the mass of a 12.31 cm 3 piece of copper having a density of 8.96g/cm3

Chemistry

1 answer:

Ipatiy [6.2K]3 years ago

3 0

You have 12.31 times more copper than 1 cm3
So:
12.31*8.96=110.30 g

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Be sure to answer all parts.

Fudgin [204]

Answer:

2H₂ + O₂ → 2H₂O

Explanation:

Chemical equation:

H₂ + O₂ → H₂O

Balance chemical equation:

2H₂ + O₂ → 2H₂O

Step 1:

H₂ + O₂ → H₂O

Left hand side Right hand side

H = 2 H = 2

O = 2 O = 1

Step 2:

H₂ + O₂ → 2H₂O

Left hand side Right hand side

H = 2 H = 4

O = 2 O = 2

Step 3:

2H₂ + O₂ → 2H₂O

Left hand side Right hand side

H = 4 H = 4

O = 2 O = 2

7 0

3 years ago

Label A is showing___ frequency waves, and label B is showing ___ frequency waves

igomit [66]

It's not really possible to tell longitudinal vs. transverse in this image as given. However, we can say that the waves labeled A are high-frequency (short wavelengths) while the waves labeled B are low-frequency (long wavelengths). So, this third answer choice would be correct here.

6 0

3 years ago

A cylindrical piece of metal is 4.5 dm in height with radius of 5.50 x 10^-5 km.

adell [148]

Answer:

a) $V=4.3x10^3mL$

b) $V=4.3x10^6mm^3$

c) $\rho=1.5x10^5g/L$

Explanation:

Hello,

a) In this case, the given height in cm is:

$h=4.5dm*\frac{1m}{10dm}* \frac{100cm}{1m}=45cm$

And the radius in cm is:

$r=5.50x10^{-5}km*\frac{1000m}{1km}*\frac{100cm}{1m}=5.5cm$

Thus, the volume in cubic centimeters which is also equal in mL (1cm³=mL) is:

$V=\pi (5.5cm)^2*45cm\\\\V=4.3x10^3cm^3=4.3x10^3mL$

b) In this case, the given height in mm is:

$h=4.5dm*\frac{1m}{10dm}* \frac{1000mm}{1m}=450mm$

And the radius in mm is:

$r=5.50x10^{-5}km*\frac{1000m}{1km}*\frac{1000mm}{1m}=55mm$

Thus, the volume in cubic millimeters is:

$V=\pi (55mm)^2*450mm\\\\V=4.3x10^6mm^3$

c) Finally, since 1000 mL equal 1 L, the required density in g/L turns out:

$\rho=\frac{m}{V}=\frac{6.54x10^5g}{4.3x10^3mL}*\frac{1000mL}{1L}\\ \\\rho=1.5x10^5g/L$

Best regards.

8 0

3 years ago

You are at home in your air conditioned garage. You are planning a family road trip from New York to Florida. You are lnfating t

Ksenya-84 [330]

Hello!

According to the Charles' Law, the volume of a gas is proportional to temperature when pressure is constant. When going from New York to Florida, if the pressure is left constant the volume of the tires will increase.

The final volume of the tires can be calculated from the following equation, derived from Charles' Law:

$V2= \frac{V1}{T1}*T2=\frac{10 L}{10degC}*32degC=32 L$

Have a nice day!

3 0

3 years ago

How many kilojoules is 1,500,000 calories

pochemuha

Answer:

1 cal = 0.004187 kJ

1,500,000 cal = 6280.5 kJ

5 0

3 years ago