All categories

2 years ago

An object is found to have a mass of 54.3 g. Find the object’s density, if its volume is 47.18 cm3

Chemistry

1 answer:

Schach [20]2 years ago

8 0

Answer:

d≈ 1.15 g/cm^3

Explanation:

The density of an object can be found by dividing the mass over the volume.

d= m/v

The mass of the object is 54.3 grams and the volume is 47.18 cubic centimeters.

m= 54.3 g

v= 47.18 cm^3

Substitute the values into the formula.

d= 54.3 g/ 47.18 cm

Divide.

d= 1.150911403136922 g/cm^3

Let’s round to the nearest hundredth. The 0 in the thousandth place tells us to leave the 5 in the hundredth place.

d ≈ 1.15 g/cm^3

The density is about 1.15 grams per cubic centimeter.

You might be interested in

2.A fisherman in a boat is drinking hot coffee. The large lake below his boat is full of cold water. Which statement is an accur

KengaRu [80]

Answer:

2. The correct option is;

The coffee will have more total thermal energy, and the particles in the coffee will be moving faster

3. The correct option is;

The gallium atoms will gain kinetic energy

4. The correct option is;

A drop of water at 90°C

5. The correct option is;

The particle will gain kinetic energy, but the potential energy of the particles will stay the same

Explanation:

In a given system, the thermal energy can be presented as follows;

$E_{th}$ = Kinetic Translational Energy + Kinetic Rotational Energy + Energy due to vibration

Therefore, thermal energy within (received by) a system is represented as a kinetic energy form while the potential energy (by the law of conservation of energy) remains the same

For gases, we have;

$E_{th}$ = 3/2·N· $K_B$ ·T (Monoatomic gas thermal energy)

$E_{th}$ = 5/2·N· $K_B$ ·T (Diatomic gas thermal energy)

$E_{th}$ = 3·N· $K_B$ ·T (Solid in elemental form)

Where;

N = The number of molecules of the substance

$K_B$ = The Boltzmann constant

5 0

2 years ago

A 30 wt % solution of NaOH is diluted in a mixer to 5 wt%. If the streams entering and leaving the mixer are at 40 oC, find the

Strike441 [17]

Explanation:

It is given that 100 kg feed solution contains 30 wt% solution NaOH. Hence, feed contains 70 kg of water and 30 kg of NaOH.

Therefore, mixer outlet shows 5 wt% NaOH.

Let us assume that the mixture outlet be F kg so, by applying mass balance of NaOH we get the value of force as follows.

$F \times 0.05$ = 30

F = 600 Kg

In that 30 kg is NaOH and 570 kg is water which also means that initially water present is 70 kg. And, additional water added is 500 kg .

Thus, water feed rate is 500 kg/hr.

6 0

2 years ago

What is the difference between a period and a group in the periodic table?

Mandarinka [93]

A period is horizontal; the elements gain 1 proton for each space moving left to right.
A group is vertical; the elements in each group have the same number of electrons in the valence shell(outer orbital).

6 0

2 years ago

Read 2 more answers

Describe the profile you would expect for a biological catalyst. Complete the sentences to explain why an enzyme is different th

uysha [10]

Answer:

- When looking at the plot G versus reaction coordinate, the profile for a biological catalyst (e.g. an enzyme) will have about the same transition state(s), with an overall activation energy that is low in comparison to the uncatalyzed reaction.

- Enzymes have a high molecular weight and are organic compounds, while inorganic catalysts often have a low molecular weight and are inorganic compounds.

- When comparing rates, enzymes are typically several times faster than inorganic catalysts.

Explanation:

Enzymes are organic molecules capable of producing a faster chemical reaction. In an enzymatic reaction the transition state -corresponding to the state in which the substrates or products are equally likely- tends to be the same, while the energy required for the reaction decreases.

The differences between an enzyme and an inorganic catalyst are structural and functional:

Enzymes are organic and of high molecular weight and catalysts are inorganic and of low molecular weight.
An enzyme can change its structure during a reaction, while the configuration of a catalyst is the same.
The reaction catalyzed by an enzyme is about 10⁶ to 10¹² times faster than with a catalyst.

5 0

2 years ago

Define essential elements and how many elements are required for life

Travka [436]

Living organisms contain relatively large amounts of oxygen, carbon, hydrogen, nitrogen, and sulfur (thesefive elements are known as the bulk elements), along with sodium, magnesium, potassium, calcium, chlorine, and phosphorus (these six elements are known as macrominerals).

3 0

3 years ago