A bottle contains 158.1 grams of lead (II) sulfate (PbSO4), used for car batteries. How many moles does it contain?

Answer:

22.22 g

Explanation:

The balanced reaction equation is;

Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)

Number of moles of calcium reacted = 8.02g/40.1g/mol = 0.2 moles of Calcium

From the reaction equation;

1 mole of Ca yields 1 mole of CaCl2

Hence 0.2 moles of Ca also yields 0.2 moles of CaCl2

Mass of calcium chloride produced = number of moles * molar mass

Mass of calcium chloride = 0.2 moles of CaCl2 * 111.1g/mol = 22.22 g

Answer:

7249.1

Explanation:

Multiply 7.1x1021= 7249.1

Answer:

A. Na

Explanation:

Sodium is a good conductor of electricity and heat because it has only one electron in its valence shell.

i hope this helps :)

Answer:

C.) P

Explanation:

I believe this is correct, lmk if it's not.

Answer:

It does not react with water, but reacts with most acids

Explanation:

Answer:

It doesn't react with water, but reacts with most acids

The  best represents the location of the Earth’s core is the pit of a peach. Therefore, option A is correct.

The earth core is almost entirely composed of metal, notably iron and nickel, in contrast to the crust and mantle, which are rich in minerals. Iron-nickel alloys found in the core are denoted by their chemical symbols, Ni,Fe. The core also contains siderophile, or substances that dissolve in iron.

The Earth's inner core contains even more metal than the outer core. Both are primarily comprised of iron with a small amount of nickel. However, lighter elements like oxygen, carbon, and silicon are also assumed to be present in small amounts in the iron.

This inner core is around 5,400 degrees Celsius hotter than the Sun's surface. The remaining portion is the liquid outer core of the Earth, which is primarily composed of nickel and iron and has temperatures that are similar to surface temperatures before becoming hotter toward the center.

Thus, option A is correct.

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Answer:i will improve my my experiment by:

1.increasing the validity of that experiment

2.Improving of measurwment techniques

3.reduction of the simple bias

4.Blinding of the experiment

Explanation:

These can be achieved by doing these respectively,

1.Through considering the given time frame feo data collection and the experimental treat

2.Done by ensuring vessels are properly clibrated, are clean and ready to use as well as functioning

3.We can avoid this by doing convenience sampling and again ensuring target population arw properly defined.

4.we can avoid this by alerting the group members on the available group assignments and the data collectors.

Answer:

1272 pound

Explanation:

From the question given above, the following data were obtained:

Pressure (P) = 38 psi

Area (A) = 12 cm by 18 cm

Force (F) =?

Next, we shall determine the area. This can be obtained as follow:

Area (A) = 12 cm by 18 cm

A = 216 cm²

Next, we shall convert 216 cm² to square inch (in²). This can be obtained as follow:

1 cm² = 0.155 in²

Therefore,

216 cm² = 216 cm² × 0.155 in² / 1 cm

216 cm² = 33.48 in²

Finally, we shall determine the force exerted. This can be obtained as follow:

Pressure (P) = 38 psi = 38 lbf/in²

Area (A) = 33.48 in²

Force (F) =?

P = F/A

38 = F / 33.48

Cross multiply

F = 38 × 33.48

F = 1272 pound

Thus, the force exerted is 1272 pound

The combustion temperature of a material determines whether a material melts or burns

Materials whose combustion temperatures are lower than their melting point gets burnt instead of melting, because before the temperature of the material is raised up to the melting point temperature,  the materials gets combusted at a lower temperature known as the combustion temperature

Melting is physical change and is controlled by the physical property ( melting point ) while burning is chemical change which is irreversible.

Hence we can conclude that The combustion temperature of a material determines whether a material melts or burns

Answer:

Chemical change.

Explanation:

When it is heated it decomposes into mercury and oxygen gas. The mercury oxide reactant becomes the silver color of mercury. Hence, a color change can be noticed throughout the reaction.

Answer:

chemical change

Explanation:

Answer:

2.A baby grasshoper is a nymph.

Explanation:

Answer:

yourinagenjitsulol

Expert

75 answers

3.6K people helped

Answer:

2.A baby grasshopper is a nymph.

Explanation:

i agree

Answer:

D

Explanation:

A rumor spread faster in a classroom where students are confined to desks than in a gym where all of the students can move around freely.

The same applies to conductivity between metals and ionic solids because metals have more close particles.

Conductivity is the process by which a material is able to transfer electric charge or heat from one point to another without the actual movement of the particles of the substance.

The conductivity of substances varies from one substance to another.

The conductivity of solids is greater than the conductivity of that of other substances.

The conductivity of substances increases with a decrease in the distance between the particles of the substance.

Thus solids that have the closest particles have the highest conductivity.

Liquids have medium conductivity.

Gases have the least conductivity because they have the most spaced-out particles.

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Answer:

1,354

Explanation:

Answer:  The intertidal or littoral zone maintains a balance between the land and the sea. It provides a home to specially adapted marine plants and animals.

Explanation: The intertidal zone is the area where the ocean meets the land between high and low tides. A tide pool within Monterey Bay National Marine Sanctuary. Intertidal zones exist anywhere the ocean meets the land, from steep, rocky ledges to long, sloping sandy beaches and mudflats that can extend for hundreds of meters.

Answer:

B

Explanation:

Answer: producers

Explanation:

Answer:

because if you do not react to anything you will be a misarable old lady with 5 cats sitting on you .

Explanation: bascially you cant live without reacations to life

Answer:

they move apart

Explanation:

when two tectonic plates move apart it causes a trench this is most common in oceans

Answer:In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench

Explanation:

Answer:

I wanna say c

Explanation:

It makes the most sense, because non-metals don't produce an electrical current, and therefore aren't conductors.

Answer:

1.  2)Hydrogen Bond

2. 1)Electromagnetic attraction

3. 2) A molecule with a positively charged end and a negatively charged end

4. 2.Hydrogen bonding

* i think i am right and i really hope so but please dont

count it against me babe.

explanation:

Individual hydrogen bonds are weak and easily broken; however, they occur in very large numbers in water and in organic polymers, creating a major force in combination. Hydrogen bonds are also responsible for zipping together the DNA double helix.

A hydrogen bond is formed when the positive end of one molecule is attracted to the negative end of another. The concept is similar to magnetic attraction where opposite poles attract. Hydrogen has one proton and one electron. This makes hydrogen an electrically positive atom because it has a deficiency of electrons.

A polar molecule is a chemical species in which the distribution of electrons between the covalently bonded atoms is not even. Some chemical species, such as chains of carbon molecules, share electrons equally and are said to be nonpolar molecules

Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.

Answer:

form of rain, snow, hail, dew, or fog that transports sulfur and. nitrogen compounds from the high atmosphere to the ground

Answer:

scavenger- eats dead carcasses

Explanation:

Answer:

I think 213g

Explanation:

Im not that smart in stuff based in this subject but I think its right but If anyone knows for sure fact check me plz....

Metals have a crystalline in nature, and a consistent shift in stress causes the structure to alter, causing the metal to stiffen and fracture. This is known as metal fatige. The bending causes that to occur.

A metal is a substance that has a shiny look when freshly processed, polished, or shattered, and conducts electricity and heat rather effectively. Generally speaking, metals are malleable and ductile.

These characteristics are the outcome of the metallic link that exists between the metal's atoms or molecules.

The earth's crust is where most pure metals are found. They are discovered in ores, which are solid materials from which metals and minerals may be extracted. The majority of the planet's iron mass, which makes up over a third of its mass, is located in its core.

Thus, Metals have a crystalline in nature, and a consistent shift in stress causes the structure to alter.

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Answer: can I suck your super long di ck or titis

Explanation:

Answer:

hi

Explanation:

Answer:Yes

Explanation:  Matter is everything around you.

Answer:24

Explanation:axtizent