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3 years ago

If you know the mass of an object you can calculate its weight with the formula

1 answer:

3 0

Answer: True

The formula of weight is w = mg, where m is the mass and g is the acceleration of gravity. If you want to calculate an object's weight, you need to know the two components: mass and gravity.

You only need to know the mass of the object because the acceleration of gravity is ALWAYS (assuming the object is on Earth) 9.8 m/s^2.

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A sample of argon gas has a volume of 795 mL at a pres-sure of 1.20 atm and a temperature of 116 ∘C. What is the final volume of

jek_recluse [69]

<u>Answer:</u> The volume when the pressure and temperature has changed is $1.6\times 10^2mL$

<u>Explanation:</u>

To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.

The equation follows:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1,V_1\text{ and }T_1$ are the initial pressure, volume and temperature of the gas

$P_2,V_2\text{ and }T_2$ are the final pressure, volume and temperature of the gas

Let us assume:

$P_1=1.20atm\\V_1=795mL\\T_1=116^oC=[116+273]K=389K\\P_2=0.55atm\\V_2=?mL\\T_2=75^oC=[75+273]K=348K$

Putting values in above equation, we get:

$\frac{1.20atm\times 795mL}{389K}=\frac{0.55atm\times V_2}{348K}\\\\V_2=\frac{1.20\times 795\times 348}{0.55\times 389}=1.6\times 10^3mL$

Hence, the volume when the pressure and temperature has changed is $1.6\times 10^2mL$

5 0

3 years ago

On July 4, 2020, America turned 7.69 x 10^9

iogann1982 [59]

America's age = 243.85 years

<h3>Further explanation</h3>

When converting units, list and multiply all the units until you find the unit you want

Time unit conversion

1 year = 365 days

1 day = 24 hours

1 hour = 3600 s

7.69 x 10⁹ seconds to years :

$\tt =7.69\times 10^9~s\times \dfrac{1`hour}{3600~s}\times \dfrac{1~day}{24~hours}\times \dfrac{1~years}{365~days}\\\\=\dfrac{7.69\times 10^9}{3600\times 24\times 365}\\\\=\boxed{\bold{243.85~years}}$

3 0

3 years ago

How did Robert Whitaker change dassification?

tester [92]

Answer:

created an organizational hierarchy

Explanation:

3 0

3 years ago

identify the kind of chemical catalysis and then identify which of the given amino acids can act as a catalyst for the reaction.

Agata [3.3K]

The kind of chemical catalysis is covalent catalysis and among the given amino acids lysine will act as a catalyst for the reaction.

The generation of iminium ions in the transition state of the reaction confirms that it is a covalent catalysis. lysine is the only amino acid that can catalyze the iminium ion generated in the transition state of the reaction.

So the answer for the type of catalysis is covalent catalysis, and the answer for the type of amino acid among the given amino acids that can catalyze the reaction is lysine.

Complete question: (Reaction is attached as a picture)

You can also learn about chemical catalysis from the following question:

brainly.com/question/13553173

#SPJ4

6 0

1 year ago

An experiment was conducted to see which metal pot would be better for cooking food quickly. The table below shows how quickly s

PolarNik [594]

Answer:

Conclusion.....hope this helps

4 0

3 years ago