All of the following compounds are soluble in water EXCEPT

a
MgSO4
b
Ca(NO3)2
с
Agi
d
K2CO3

Insects can walk on water due to its surface tension, which is something like 0.07 J/m^2.

So water (and most liquids) have a property called surface tension, which is defined as the amount of energy that you need to increase the surface per area unit of the liquid volume.

Thus, if the insect has smaller energy than that, it would not change the surface of the liquid, allowing it to walk on the water's surface.

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Answer: They are able to walk on water because of surface tension. Liquid molecules are held together by electrostatic forces. Molecules on the surface of the water are attracted to surrounding molecules and tension is created as the molecules get pulled down. This allows them to distribute their body weight over the water’s surface without breaking through that force.

Explanation:

Answer:

join the provisonal IRA and help free and unite ireland

Explanation:

fight aganst the english oppressors and free ireland

erinn go braugh

Answer:

2.Closed System: A closed system is a thermodynamic system where energy can be exchanged with its surrounding but not matter. Open System: Open systems can exchange matter with the surrounding. Closed System: Closed systems cannot exchange matter with the surrounding. Open System: The mass of the system will vary with time in open systems.

Explanation:

1.The particle model is the name for the diagrams used to draw solids, liquids and gases. In the model, the particles are shown as circles or spheres. However, the particles in ice, liquid water and steam look the same because they are all water, but in different states of matter. Why do we use the particle model in science?

3.An open system can be defined as a system which can exchange both matter and energy with the surrounding. For example, the earth can be recognized as an open system. In this case, the earth is the system, and space is the surrounding. Sunlight can reach the earth surface and we can send rockets to space.

Answer:

Length of ramp = 77.27ft

Explanation:

Step 1 - Sketch a diagram

Make a line about 15 deg. above the horizontal x-axis. Draw the horizontal and vertical components to form a right triangle. See image if you don’t understand.

Step 2 - Label your diagram

Your triangle creates a 15 deg. angle with the x-axis and we know the vertical distance from the top of the ramp to the ground is 20 ft.

Step 3 - Use trig to make an equation and solve

SOH CAH TOA

I’m this problem we know the angle, know “opposite, and we are solving for the hypotenuse of the triangle. Therefore, it would be easiest to use SOH or sin(theta)= (opp./hyp.) Plug in the numbers and solve for the hypotenuse.

All work is shown in the attached image.

The method of propagation of the given organisms is shown below:

1. Mongo ---> seeds

2. Moss ---> spores

3. Ferns ---> stem

4. Pine Tree ---> cones

5. Guava ---> seeds

6. Mango ---> seeds

7. Coconut ---> seeds

8. Katakataka ---> leaves

9. Potato ---> stem

10. Okra ---> seeds

Repr0duction is the process by which living organisms produce young ones of their kind.

Repr0duction can either involve two parents through the joining of male and female gametes to produce a zygote i.e. seeds in plants and embryo in animals or can involve only one parent and occurs through vegetative parts such as roots, stem, or leaves.

The table below gives organisms and their propagation parts:

1. Mongo ---> seed

2. Moss ---> spores

3. Ferns ---> stem

4. Pine Tree ---> cones

5. Guava ---> seeds

6. Mango ---> seeds

7. Coconut ---> seeds

8. Katakataka ---> leaves

9. Potato ---> stem

10. Okra ---> seeds

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Carbohydrates which include sugars and starches are the primary energy sources produced in plants and used by heterotrophic organisms.

Carbohydrates are composed of a basic chemical formula that typically contains a ratio of one Carbon atom for every two Hydrogen atoms and one Oxygen atom C1H2O1. Basically one carbon atom for every one water molecule Carbon + Water = Carbohydrate.

Monosaccharides or Single Carbon Chain Sugars include Glucose C6H12O6

Disaccharides or Double Carbon Chain Sugars include Sucrose C12H22O11

Combining monosaccharides and disaccharides create Polysaccharides which are complex sugars called starches.

Answer:

I think that is the literal answer

Answer:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. 

Answer:

A covalent bond is the “interatomic linkage that results from the sharing of an electron pair between two atoms.”

Explanation:

Hope this helps have a nice day

Answer:

b

Explanation:

OH and CN both have -1 charges

Answer:

It's all of the above.

Explanation:

I took the quiz.

I think correct answer is C.Jet stream would be displaced southwards causing heavy rain and flooding

The statement that is a likely impact of stronger than normal trade winds in the Pacific Northwest to the United States is Jet stream would be displaced southwards causing heavy rain and flooding.

Answer:

Tortilla

Explanation:

Answer:

tortilla

Explanation:

Answer:

It has a higher boiling point than water, and it likely has a stronger electrostatic forces between its molecules than water.

Explanation:

The unknown substance has a higher boiling point than water, and it likely has stronger electrostatic forces between its molecules than water.

The temperature at which a liquid's saturated vapour pressure equals the air pressure surrounding it is known as the boiling point.

It is given that an unknown substance has a boiling point of 174°C.

The boiling point of water is 100°C.

So the boiling point of the unknown substance is higher than that of water.

Higher boiling point signifies more heat required to break the bonds.

Higher boiling point means existence of strong non covalent bonds.

This means  it likely has stronger electrostatic forces between its molecules than water.

Therefore Option A is the correct answer.

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When oxygen -15 nucleus undergoes beta emission, it is transformed into Fluorine - 15 nucleus.

Beta decay is said to occur when a neutron is converted to a proton. This process leads to the emission of en electron. The neutron - proton ratio decreases and the atomic number of the daughter nucleus is greater than that of the parent nucleus by one  unit.

Hence, when oxygen -15 nucleus undergoes beta emission, it is transformed into Fluorine 15 nucleus.

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Answer:

The three specific cone cells in our eyes work together, allowing us to translate these three colors of light into millions of different colors. ... When green and blue light are combined, they make cyan. Red and green light make yellow. And when all three primary colors of light are combined, we see white light.

Explanation:

The volume of water needed to make the solution is 473.76 mL

We'll begin by calculating the volume of the diluted solution.

M₁V₁ = M₂V₂

15.5 × 5.41 = 0.175 × V₂

83.855 = 0.175 × V₂

Divide both side by 0.175

V₂ = 83.855 / 0.175

V₂ = 479.17 mL

Finally, we shall determine the volume of water needed.

Volume of water = V₂ – V₁

Volume of water = 479.17 – 5.41

Volume of water = 473.76 mL

Therefore, the volume of the water needed is 473.76 mL

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Answer: it wound'nt let me type the equations out so i did it on g.o.o.gl.e docs :')

Explanation:

hope this helps <3

have a great day/night/noon

:)

Answer:

0.16 L

Explanation:

Step 1: Write the balanced equation

C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g)

Step 2: Calculate the moles of CO₂ produced from 0.012 moles of O₂

The molar ratio of O₂ to CO₂ is 5:3. The moles of CO₂ produced are 3/5 × 0.012 mol = 0.0072 mol.

Step 3: Calculate the volume occupied by 0.0072 moles of CO₂ at standard temperature and pressure

At STP, 1 mole of CO₂ occupies 22.4 L.

0.0072 mol × 22.4 L/1 mol = 0.16 L

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Answer:

Ionic bond occurs between two atoms that have different:

a) Electron

Explanation:

according to the definition of ionic bond,

it is the electrostatic force of attraction that holds the two oppositely charged ions together and an ionic bond or electrovalent bond is formed when one atom gains electrons while the other atom loses electrons from its outermost level or orbit.

Molecules' general shape, as well as bond lengths, bond angles, torsional angles, and any other geometrical factors that affect each atom's position, are revealed by their molecular geometry. The molecular geometry of AsCl₃ is trigonal pyramidal.

Molecule geometry is the study of the three-dimensional configuration of the atoms that make up a molecule. Because the shared pairs of electrons remain localized in a specific location between the nuclei of the involved atoms, covalent molecules have directed bonds.

The arsenic atom is surrounded by 4 regions of electron density which means that it has a steric number equal to 4. According to VSPER Theory, the molecular geometry will be trigonal pyramidal, AX₃E₁.

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Answer:

D. The bike experiences a contact force and Earth experiences a non-contact force.

Answer:D. The bike experiences a contact force and Earth experiences a non-contact force.

Explanation:

why is because tthe force wil make the bikw wobbly and boom no contact force

It will take the Ne gas approximately 1.2 s to equilibrate between the two sides.

We know that the time taken for a gas to diffuse is dependent on the molar mass of the gas. This is one of the interpretations of Graham's law of diffusion in gases. Thus, Let;

t1 = time taken for Rn to equilibrate = 4.0 s

t2 = time taken for Ne to equilibrate = ?

M1 = molar mass of Rn = 222g/mol

M2 = molar mass of Ne = 20 g/mol

Using

t1/t2 = √M1/M2

4/t2 = √222/20

4/t2 = 3.33

t2 = 4/3.33

t2 = 1.2 seconds

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Answer:

When we do multiple trials of the same experiment, we can make sure that our results are consistent and not altered by random events and are reliable. Multiple trials can be done at one time. E.g. If we were testing a new fertilizer, we could test it on lots of individual plants at the same time.

Hope that helped.x

Answer:

Without the hydrosphere, the atmosphere will no longer be able to carry up the evaporated water, as well as pour down the water, leaving the biosphere to rot away. The hydrosphere works with the Biosphere to provide the requirement of water to the organisms needs, as well as the hydrosphere assisting in photosnythesis.

Explanation:

Answer:

The hydrosphere refers to the water on the earth crust. If there were no hydrosphere, we would not have lakes, oceans, rivers, or even a hose full of water. There would also be no life. Nothing can live without water, so nothing would have evolved.  

Explanation:

Answer:

good job ;0

Explanation:

Answer: A typical hydrogen fuel cell produces 0.5 V to 0.8 V per cell. To increase the voltage individual cells can be connected in series.

Answer:

nm, dm, km, m

Explanation:

1 nanometer = 1e-12 (0.000000000001) kilometers

1 decimeter = 1e-4 (0.0001) kilometers

1 kilometer = 1 kilometer

Regardless of whether 'm' stands for mile or meter, it's still larger than all of these being approx. 1.61 and 1e-3 (0.001) kilometers respectively.

in the future, please provide the exact units.

Such as:

nanometers, decimeters, kilometers, meters

Answer:

1.1 mol

Explanation:

n=m/M, where n is moles, m is mass, and M is molar mass.

M of CO2 = 12.01+16.00+16.00 = 44.01g/mol

n=50g/44.01g/mol

n = 1.13610543 mol

n ≈ 1.1 mol

Hope that helps