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4 years ago

A piece of notebook paper

Chemistry

2 answers:

Elis [28]4 years ago

6 0

Answer:

Yes it is a Heterogenous mix because we know a piece of notebook paper comes from a tree and we know a tree is a amplafier for fire which is why it is used as a element and a compound so it is a mix

VikaD [51]4 years ago

4 0

An element but I’m not too sure

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A ________ can be defined as a very large molecule constructed from repeated molecular fragments or segments.

Semenov [28]

The Answer is D. a polymer is a substance that has a molecular structure consisting of a large number of similar units bonded together

7 0

3 years ago

How would I do the conclusion for this?

rosijanka [135]

Answer:

very confused but, hope this helps in a way-:

What can be the Results and conclusion to this experiment?

1) Observation: Plants grow well in the ant habitats.

2) Question: Does ants help in plant's growth?

3) Hypothesis: There is a mutualistic relationship between plants and ants.

4) Experiment: This hypothesis can be experimented using ecological study design. The growth of two plants, one growing in the presence of ants and the other in the absence of ants are compared. All other variables like temperature, moisture, soil and nutrients are maintained constant. The growth in plants are measured after two months. It will be observed that the growth of plants in the presence of ants is more than the other plant. Ants help in aerating the soil and protects the plant from herbivores, and fungal attack.

3 0

3 years ago

A 6.1-kg solid sphere, made of metal whose density is 2600 kg/m3, is suspended by a cord. When the sphere is immersed in a liqui

deff fn [24]

Answer:

Density of the liquid = 1470.43 kg/m³

Explanation:

Given:

Mass of solid sphere(m) = 6.1 kg

Density of the metal = 2600 kg/m³

Thus volume of the liquid :

$Volume(V)=\frac{Mass(m)}{Density (\rho)}$

Volume of the sphere = 6.1 kg/2600 kg/m³ = 0.002346 m³

The volume of water displaced is equal to the volume of sphere (Archimedes' principle)

Volume displaced = 0.002346 m³

Buoyant force = $\rho\times gV$

Where

$\rho$ is the density of the fluid

g is the acceleration due to gravity

V is the volume displaced

The free body diagram of the sphere is shown in image.

According to image:

$mg=\rho\times gV+T$

Acceleration due to gravity = 9.81 ms⁻²

Tension force = 26 N

Applying in the equation to find the density of the liquid as:

$6.1\times 9.81=\rho\times 9.81\times 0.002346+26$

$33.841=\rho\times 9.81\times 0.002346$

$\rho=\frac{33.841}{9.81\times 0.002346}$

$\rho=1470.43 kgm^3$

<u>Thus, the density of the liquid = 1470.43 kg/m³</u>

6 0

4 years ago

After 42 days, a 2.0 g sample of phosphorous-32 contains only 0.25 g of the isotope. What is the half-life of phosphorus-32?

tester [92]

Answer:

Half life of phosphorous-32 = 14 days

Explanation:

Given data:

Total mass of phosphorous-32 = 2.0 g

After 42 days mass left = 0.25 g

Half life of phosphorous-32 = ?

Solution:

First of all we will calculate the number of half lives passed.

At time zero = 2.0 g

At first half life = 2.0 g/2 = 1.0 g

At 2nd half life = 1.0 g/2 = 0.5 g

At 3rd half life = 0.5 g/2 = 0.25 g

Half life:

Half life = T elapsed / half lives

Half life = 42 days/ 3

Half life = 14 days

4 0

3 years ago

What is the correct name for the compound with the chemical formula NH4NO3?

olga nikolaevna [1]

Answer:

The correct answer is - Ammonium nitrate.

Explanation:

Ammonium nitrate is a chemical compound that is represented by the chemical formula NH4NO3. It is a chemical compound with ions of ammonium and nitrate that forms a white crystalline solid which is soluble in water.

Ammonium nitrate is used as fertilizer in agriculture to provide a high amount of nitrogen to the soil and plants. It is a hygroscopic as a solid chemical compound.

4 0

3 years ago