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2 years ago

If the reactants of wood when burning weigh 10 kgs, how much will the products weigh?

Chemistry

1 answer:

aksik [14]2 years ago

7 0

Answer:

the weight of products is is equal the weight of the wood plus the weight of oxygen that was used to burn that wood, so weigh of the product is greater than 10 kilograms.

Explanation:

Conservation of mass (mass is never lost or gained in chemical reactions), during chemical reaction no particles are created or destroyed, the atoms are rearranged from the reactants to the products.

In this example wood (mostly carbon) and oxygen are reactants and carbon dioxide (mostly) is product of reaction.

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Infrared radiation can be detected by D. night-vision goggles.

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3 years ago

Consider a perfectly insulated and sealed container. Determine the minimum volume in L of the container such that 0.37 L of wate

Nataly_w [17]

Answer: The minimum volume of the container must be 460.54 L.

Explanation:

Density is defined as the ratio of mass and volume of a substance.

$\text{Density}=\frac{\text{Mass}}{\text{Volume}}
$ ......(1)

Given values:

Volume of water = 0.37 L = 370 mL (Conversion factor: 1 L = 1000 mL)

Density of water = 1.00 g/mL

Putting values in equation 1, we get:

$\text{Mass of water}=(1.00g/mL\times 370mL)=370g$

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(2)

Given mass of water = 370 g

Molar mass of water = 18 g/mol

Putting values in equation 2, we get:

$\text{Moles of water}=\frac{370g}{18g/mol}=20.56mol$

At STP conditions:

1 mole of a gas occupies 22.4 L of volume

Applying unitary method:

20.56 moles of water will occupy = $\frac{22.4L}{1mol}\times 20.56mol=460.54L$ of volume.

Hence, the minimum volume of the container must be 460.54 L.

8 0

3 years ago

A vehicle is traveling at a speed of 92.5 km/h. What is this value in feet per second? Note that, by definition, 1 in = 2.54 cm.

Harlamova29_29 [7]

Answer:

$v=84.3\frac{ft}{s}$

Explanation:

Hello,

In this case, given that 1 kilometer equals 1000 meters, 1 meter equals 3.281 feet and 1 hour equals 3600 seconds, the required velocity in feet per second turns out:

$v=92.5\frac{km}{h}*\frac{1000m}{1km} *\frac{3.281ft}{1m} *\frac{1h}{3600s}\\ \\v=84.3\frac{ft}{s}$

Regards.

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3 years ago

In order to be sure that your results are accurate, you must be able to ______ your experiment.

mina [271]

The answer is A, you must repeat your experiment to ensure you results are accurate. That is the best way to know for sure and it is what you must do to every experiment.

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3 years ago

A box has dimensions 0.2 mx 0.4 m x 0.6 m. What is the

AnnyKZ [126]

Answer:

$V=0.048m^3$

Explanation:

Hello,

In this case, since the volume is computed by multiplying the given dimensions as follows:

$V=0.2m*0.4m*0.6m$

The result is shown in cubic meters since each meter is also added:

$V=0.048m^3$

Best regards.

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3 years ago