please help

Tare the balance. Place the wooden block on
the pan, and record the block's mass below. g

the percent yield: 9/21 x 100% = 42.9%

Answer:

Suppose that several objects composed of different materials are heated in the same manner. Will the objects warm up at equal rates? The answer: most likely not. Different materials would warm up at different rates because each material has its own specific heat capacity. The specific heat capacity refers to the amount of heat required to cause a unit of mass (say a gram or a kilogram) to change its temperature by 1°C. Specific heat capacities of various materials are often listed in textbooks. Standard metric units are Joules/kilogram/Kelvin (J/kg/K). More commonly used units are J/g/°C. Use the widget below to view specific heat capacities of various materials. Simply type in the name of a substance (aluminum, iron, copper, water, methanol, wood, etc.) and click on the Submit button; results will be displayed in a separate window.

Explanation:

Answer:

7.2e+6 cm (7200000cm)

Explanation:

Hope this is the answer your looking for ;)

The events in the order of top to bottom for a digital recording to become sound waves through a speaker include:

This is defined as a pattern of disturbance caused by movement of energy along a medium.

The order of events which produces the sound heard by audience can be seen above.

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Answer:

Fossil fuels release greenhouse gases and are non renewable

Answer:

Metallic bonding is the type of chemical bonding that occurs between atoms of metals. In a metallic bond, atoms share their electrons in a way that allows them to form a “sea” of free electrons. This electron sea is responsible for the unique physical and electrical properties of metals.

Explanation:

Answer:

B. allow for bonding metals to be stable.

Explanation:

edge 2022

#a

#b

#c

This is reversible reaction

Answer:

Explanation:

3 Apply Many scientific words, such as energy, also have everyday meanings. Use context clues to write your own definition for each meaning of the word energy.

Answer:

4

Explanation: it's a carbon atom right....soo it'll form 4 bonds(single)

An atom can form 4 single covalent bonds is carbon with two electron shell.

The bonds are defined as a strong bond that binds atoms, ions, or molecules together and promotes the production of molecules.

There are three types of bonds.

Covalent bonds are defined as the bond formed by sharing of electrons with each other.

Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons. Bonding pairs or sharing pairs are other names for these electron pairs.

It can also be defined as a type of chemical link where atoms share electrons to create electron pairs.

Covalent bonds  has low melting point, boiling point, enthalpy of fusion and enthalpy of vaporization.

Thus, an atom can form 4 single covalent bonds is carbon with two electron shell.

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Answer:

it is a

Explanation:

i hope this helps you

Answer:

because it needs to fit exactly into how your body is like

Explanation:

One potential drawback of using fuels cells in cars is that it require large tanks for hydrogen storage.

Fuel cells are cells which use hydrogen and oxygen as fuel to produce electrical energy for use in various purposes such as in powering cars.

The energy produced is as a result of redox reactions.

Fuels cells are clean renewable energy sources.

A potential drawback of using fuels cells in cars is that it require large tanks for hydrogen storage.

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Answer:

2500g

Explanation:

Half-life like the name suggests cuts the amount by half. So 10,000 grams would be 5,000 grams in one half-life (14 days). But 28 days is two halflives (14 + 14 = 28), thus 5,000 would be cut in half again to finally be 2500 g.

Answer:

Explanation:

n a laboratory experiment, you perform the above reaction. However, you only get 7.50g of Al. What was the percent yield of that experiment?

Answer:

s= 3.20 mph

Explanation:

s=t/d

s=380miles/5hours

Answer:

Sodium fluoride (NaF) does indeed follow the octet rule without any violations.

Answer:

Alkyne are hydrocarbons which contain carbon-carbon triple bonds.

Answer:

a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.

Explanation:

Answer:

3 - Methylpent-2-yn-1-ol

Answer:

114 grams N₂

Explanation:

To find the answer, you need to (1) convert from moles CuO to moles N₂ (via the mole-to-mole ratio from equation) and then (2) convert from moles to grams (via molar mass from the periodic table). The final answer should have 3 sig figs according to the given value (12.2).

2 NH₃ + 3 CuO --> 3 Cu + 1 N₂ + 3 H₂O

Molar Mass (N₂): 2(14.01 g/mol)

Molar Mass (N₂): 28.02 g/mol

12.2 moles CuO           1 mole N₂              28.02 grams
-----------------------  x  -----------------------  x  -----------------------  = 114 grams N₂
                                  3 moles CuO              1 mole N₂

Say out loud what you want to remember.

Take notes by hand, not on a computer.

Chunk your study sessions.

Test yourself. A lot.

Change the way you practice.

Exercise regularly.

Get more sleep.

Learn several subjects in succession.

If 321.5 grams of phosphorus chloride are made, then 168.235 grams of phosphorus were consumed.

Relation between the mass and moles of any substance will be represented as:

Moles of phosphorous chloride = 321.5g / 74.55g/mol = 4.315 mole

Given chemical reaction is:

2K + Cl₂ → 2KCl

From the stoichiometry of the reaction:

2 moles of KCl = produced by 2 moles of K

4.315 moles of KCl = produced by 4.315 moles of K

Mass of potassium = (4.315mol)(39g/mol) = 168.235 g

Hence required mass of phosphorous is 168.235 g.

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Answer:

1.Renewable resources.
2.Non- Renewable

3. Geothermal Energy.

4. Kenetic

5.Hydroelectric energy

6. Fossil fuels.

7.Coal

8.Wind power? (im trying to work with what you gave me)

9.Conservation

10. in the future? (these are ones that you have to think about)

Explanation:

you didnt give a key so at least give me credit for working with what i got.

Solar energy, geothermal energy, water and wind energy are renewable resources, Non- renewable, geothermal energy, kinetic, hydroelectric energy, fossil fuel, coal, wind power, conservation.

Renewable resources are energy sources that are never depleted and can provide a steady supply of clean energy.

The capacity to work is defined as energy. It can take the form of potential energy, kinetic energy, thermal energy, electrical energy, chemical energy, nuclear energy, or any other form.

1) Renewable resources resources. coal, oil, natural gas are examples of

2) Non- renewable sources.

3) Geothermal energy or heat from the ground is less polluting than crude oil. but when they are taken from deep under the ground, areas that have high biodiversity are destroyed. hydropower (hydro meaning water) is energy that comes from the force moving.

4) Kinetic lowing water creates energy that can be captured and turned into

5) hydroelectric energy the most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. natural gas is a form of

6) fossil fuel so are coal and crude oil (sometimes called petroleum). in the Philippines, we have coal and natural gas deposits a black or brownish black, solid rock that can be burned.

8.) Wind power is a clean  source that we can rely on for a long-term future. a wind turbine creates reliable, cost- effective, pollution-free energy. it is affordable, clean, and sustainable.

9) .Conservation is the practice of caring for these resources so all living things can benefit from them now and in the future. to use natural resources

10) In the future, we need to rethink which resources we use and how we use them.

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Based on the percentage of people that prefer to swim on weekends, the probability that a female who prefers swimming on weekends is picked is 0.40.

This can be found by the formula:

= Percentage of females who prefer swimming on weekends / Percentage of those who swim on weekends

Solving gives:

= 10% / 25%

= 0.40 or 40%

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Answer:

True

Explanation:

This is because the Earths ionisphere was distrubed which makes radio communications.

Answer:

hope this will help you

Explanation:

[tex]the \: structural \: formula \: is \: ch3 - ch2 - oh \\ \\ and \: chemical \: formula \: is \: c2h6o[/tex]

The chemical formula for ethanol is [tex]C_2H_5OH[/tex], where there are 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom are there.

A chemical formula tells us the number of atoms of each element in a compound.

The methyl group ([tex]CH_3-[/tex]) carbon attaches to the methylene group ([tex]CH_2-[/tex]) carbon, which binds to the oxygen of the hydroxyl group (-OH).

Hence, the chemical formula for ethanol is [tex]C_2H_5OH[/tex], where there are 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom are there.

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Answer:

here down below is the anwser

Explanation:

Whereas ionic compounds are usually formed when a metal and a nonmetal combine, covalent compounds are usually formed by a combination of nonmetals. Thus, the periodic table can help us recognize many of the compounds that are covalent.

Answer:

four single covalent bonds

Explanation:

cuz a carbon atom initially has four unpaired electrons in its outermost shell....sharing adds four more....making four bonds