All categories

3 years ago

. Which of the following animals is sessile?

Chemistry

2 answers:

Nastasia [14]3 years ago

7 0

Answer:

Explanation:

sponges are sessile animals because i cannot move freely and sessile animals cannot move freely.

storchak [24]3 years ago

4 0

Answer:

A) Jellyfish

Explanation:

has a sessile larval stage as a polyp, leading to a motile stage as they reach maturity. Conversely, organisms such as barnacles have a motile, pelagic larval stage and become sessile in their adult life

You might be interested in

1. A balloon shrinks when it ’s taken outside in the winter.

monitta

Explanation:

1) Charles's Law: This law states that the volume is directly related to the temperature of the gas when pressure and number of moles are held constant.

$V\propto T$ (At constant Pressure and number of moles)

2) Boyle's Law: This law states that Pressure is inversely related to the volume of the gas when temperature and number of moles are held constant.

$P\propto \frac{1}{V}$ (At constant Temperature and number of moles)

3) Avogadro's Law: This law states that Volume is directly related to the Number of moles of gas when Pressure and temperature are held constant.

$V\propto n$ (At constant Pressure and Temperature)

For the given options:

1) A balloon shrinks when it is taken outside in the winter.

In this the temperature is low outside in winters and as we take the balloon outside, the volume also as it shrinks. So, this situation follows Charles's Law.

2) When the size of an air chamber is increased, the air pressure decreases.

As the size is increasing which means that the volume is increasing and hence, the pressure is decreasing. This situation is following Boyle's Law.

3) A balloon expands when air is blown into it.

As the number of particles are increasing when we blow air into the balloon and as a result the size of the balloon is also increasing. Therefore, this situation is following Avogadro's Law.

4) A closed, flexible container expands when it is heated.

In this situation, the temperature is increasing and as a result thus container is also expanding. Thus, this situation is following Charles's Law.

5) Pressing on an inflated balloon decreases its size.

Here, the pressure is increasing the volume of the balloon is decreasing because the size is decreasing. This situation is following Boyle's Law.

3 0

4 years ago

Read 2 more answers

A balloonist begins a trip in a helium-filled balloon in early morning when the temperature is 15°C. By mid-afternoon, the tempe

madam [21]

ΔH(enthalpy change) for the process is 311.775J.

The amount of heat released or absorbed during a reaction that takes place under constant pressure is referred to as the enthalpy change. The sign for it is H, which can be read as "ΔH." Note that only reactions carried out under constant pressure are covered by the phrase "enthalpy change."

Enthalpy is significant because it tells us how much heat is there in a system (energy). Heat is crucial because it allows us to produce useful work. In terms of a chemical process, an enthalpy shift reveals how much enthalpy was gained or lost. Enthalpy is the system's heat energy.

A reaction is endothermic if the enthalpy of the products is larger than the enthalpy of the reactants, as indicated by a positive ΔH value. This indicates that higher energy products were created from lower energy reactants and that the higher energy change was a result of energy absorption from the environment.

Cp =5/2 R

Enthalpy change= nCpΔT

Enthalpy change= 1×5/2 R × (T2 − T1)

Enthalpy change= $\frac{5*8.314}{2}$ × 15

Enthalpy change = 311.775 J

To know more about Enthalpy change refer to: brainly.com/question/4526346

#SPJ4

6 0

1 year ago

Set up the ion formation equations, with ionization energy values for each electron in the valence layer, of the atoms of the ch

Studentka2010 [4]

Explanation:

Set up the ion formation equations, with ionization energy values for each electron in the valence layer, of the atoms of the chemical elements below: a) Na z=11 b) Ca z= 20 c) Sr z 38 d) Li z= 3 e) Cs z= 55 f) Be z= 43

7 0

3 years ago

How many moles of koh are required to prepare 0.80 l of 6.4 m koh? 0.13 mol koh 5.1 mol koh 7.2 mol koh 8.0 mol koh?

wel

Answer is: 5,1 mol KOH.
V (KOH) = 0,8l = 0,8 dm³.
c (KOH) = 6,4 mol/dm³.
V - volume of solution.
c - concentration of solution.
c = n÷V
n - amount of substance.
n (KOH) = c·V = 6,4 mol/dm³ · 0,8 dm³ = 5,12 mol.
Potassium hydroxide (KOH) can dissolve in water at room temperature.

8 0

4 years ago

A mixture of compounds containing diethylamine, phenol, ammonia, and acetic acid is separated using liquid-liquid extraction as

umka2103 [35]

Answer:

I would expect to extract the acetic acid.

Explanation:

In the first step, since we are adding a concentrated acid, it will react with the bases present in the mixture (diethylamine and ammonia) forming salts, which are soluble in water. Therefore, after draining the aqueous layer, we will have phenol and acetic acid left in the organic layer.

In the second step, we are adding a diluted base, so it will react with a strong acid. This compound is acetic acid, and its salt will be present in the aqueous layer. Phenol will be left on the organic layer.

7 0

3 years ago