Fill in the coefficients, help, please.

Answer:

Silicon dioxide

Explanation:

Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO₂, most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand.

The name of the following covalent compound: SiO₂ is silicon oxide.

The name of the covalent compound is silicon oxide. Note that covalent compounds are known for their ability to share electrons. This is the case with the compound, silicon oxide that shares electrons with oxygen.

In the compound, there are two atoms of oxygen and one atom of silicon.. So, the name of the compound is silicon oxide.

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Answer:

D. all of the above

Explanation:

edg 2021

A way that human modification of limiting factors causes unbalances in ecosystems. are habitat loss, pollution, and climate change. Option D. This is further explained below.

Generally, An ecosystem is a geographical region in which plants, animals, and other species, as well as weather and topography, coexist to produce a circle.

In conclusion, habitat loss, pollution, and climate change are all human modification of limiting factors causes unbalance in ecosystems.​

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CQ

which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above

Answer:

Its answer choice C

Answer:

a) Hydrogen and Fluorine

b) Lithium and Oxygen

c) Potassium and Phosphorus

d) Nickel and Oxygen

e) Mercury and Chlorine

Explanation:

The capital letters in the compounds represent a single element, while some elements have one capital letter and one small letter after it.

a) H & F

b) Li & O

c) K & P

d) Ni & O

e) Hg & Cl

The famous formula E=mc^2 really says that mass and energy are the same thing, but measured in different units. So the separate laws of conservation- one for mass and the other for energy- are now merged into one law.

Einstein's theory of special relativity (1905) shows that matter (as mass) and energy can be converted into each other according to the famous equation E = mc2, where E is energy, m is mass, and c is the speed of light.

Hope It helps you.

Answer: 1849.9584

Explanation:

The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."

The organization of metals in a declining sequence of respective reactivities is referred to as the "activity series," also described as the "reactivity series" of metals.

Materials having the qualities of being bright, hard, fusible, malleable, ductile, etc. were known as metals.

The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."

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Answer:

The main products are ATP, carbon dioxide, and water.

Answer:

the hydrogen end

Explanation:

In H - F molecules there is a charge separation. Hydrogen has partial positive charge on them and Fluorine has a partial negative charge on it.

Answer:

goggles

Explanation:

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Answer:

7 moles of NaOH will produced.

Explanation:

Given data:

Number of moles of sodium oxide = 3.5 mol

Number of moles of sodium hydroxide produced = ?

Solution:

Chemical equation:

Na₂O + H₂O      →     2NaOH

Now we will compare the moles of sodium oxide with sodium hydroxide.

                 Na₂O            :         NaOH      

                    1                 :             2

                  3.5               :         2/1×3.5 = 7

7 moles of NaOH will produced.

Answer:

The second choice and can i have brainiest

Explanation:

Answer:

C. Magnesium

Explanation:

Zinc sulphate (ZnSO4) will react fastest with Magnesium (Mg) because magnesium is more reactive than Zinc and other given elements.

Zinc sulphate (ZnSO4) reacts with Magnesium (Mg) and undergo displacement reaction. Zinc is displaced by magnesium and form Magnesium Suphate (ZnSO4).

                 ZnSO4 + Mg => MgSO4 + Zn

Answer: 0.7 moles

Explanation:

Answer:

Loss of energy to a colder material. Ice forms at 32°F /0° C.

Explanation:

As water cools, the natural movement between the molecules slows until it changes to a solid state (just as it boils to gas if they become too active). This movement doesn't completely stop until the material hits "absolute zero" at -460°F /-273° C. (0° Kelvin).

That's about the temperature "in the shade" in outer space.

A more interesting question would be, "why does water expand when it freezes?" The H - two - O molecule forms a triangle (with the O in the middle).

As it cools, the angle formed by the two H's gets larger. At around 36°F /2° C , the shrinking space between molecules gets overwhelmed by the expanding size of each molecule.

So, for those last few degrees before freezing, the overall volume gets bigger instead of continuing to decrease.

That's what causes potholes in roads (water settles into cracks, then makes the crack larger as it freezes). It's what damages the eaves trough around your roof, breaks leaves down into topsoil and splits boulders in half.

Answer:

2 option

Explanation:

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Answer:

If the mass stays constant the object's density decreases as the volume increases. ... Because the property of density is a constant for all variables, density can be used to identify the material an object is made of.

Explanation:

Answer:

Explanation:

1. It reacts with hydrogen when heated

     Chemical property

2. It is a yellow solid at room temperature

    Physical property

3. It is soluble in carbon disulfide

    Chemical property

4. Its density is 2.97 g/cm3

    Physical property

5. It melts at 113°C

    Physical property

Physical properties tells us everything about what substance is when no change is occurring to its constituents.

It can be observed using apparatus and instruments. Examples are state of matter, color, odor, taste, texture, hardness, solubility in water, density, melting point and boiling point

Chemical properties are those properties that tell us about what a substance can do as regards to whether or not the substance reacts with other substances. Examples are flammability, rusting of irons, precipitation, decomposition of water by an electric current.

Answer:

Wavelength increases, and frequency decreases.

for my lazy friends its letter C

Explanation:

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The statement 'wavelength increases and frequency decreases' best describes electromagnetic waves moving from gamma rays to radio waves (option C).

The term wavelength makes reference to the distance between the picks of the waves in the electromagnetic spectrum.

In conclusion, the statement 'wavelength increases and frequency decreases' best describes electromagnetic waves moving from gamma rays to radio waves (option C).

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Answer:

Helium will heat up the fastest

Explanation:

Answer:

One mole of calcium is present in one mole of calcium carbonate

Explanation:

Because its formula is CaCO3

Ca contains 2+ charge and CO3 contains 2- charge

The number of proton is the atomic number of an element. Every element has a unique atomic number.

Answer:

the number of proton is equal

Answer:

The food pyramid is just to make people have a healthier "Diet."

Explanation:

It shows the food groups we eat and which ones to put together to make a healthy diet. Eating the right amount of each food group is called a "Balance" diet. Therefore, its not needed, but it is useful.

Explanation:

Chemistry, however, plays the primary role in materials science because it provides information about the structure and composition of materials. Materials scientists study the structures and chemical properties of various materials to develop new products or enhance existing ones.

Answer:

the other person is right.

Explanation:

Answer:

Ionic bonding is the type of bond that is made between a nonmetal and a metal. In this type of union, one of the elements yields electrons and the other accepts electrons.

In this case, the metal is Lithium, we need a nonmetal to complete the union. (Don't know if you need this or anything but here you go)

Beryllium is a metal.

Calcium is a metal.

Fluoride is a nonmetal.

Sodium is a metal.

After the analysis, we conclude that the correct answer is Fluoride since it is the only one that is a nonmetal.

Answer:

28.1

Explanation:

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Answer:

GCATACGT

Explanation:

A=T

G=C

C=G

T=A

This key goes with any complementary DNA strand.

Hope this helps you out!