Help I need them fast pls

Answer:

Yes.

Explanation:

Answer:

=0=0==00=0=0=

Explanation:

can i have Brainliest i need 1 more

Answer:

C. They change the substance into another substance.

Explanation:

Hope it helps!!

Answer:

gas

Explanation:

at Standard Temperature and Pressure Carbon monoxide (CO), carbon dioxide (CO2) and nitrogen dioxide (NO2) exist as gases

Option C is correct

Covalent compounds are compounds that are characterized by strong Intra-molecular bonds and they are solids as they have higher molecular weights

But when compounds like Carbon monoxide (CO), carbon dioxide (CO2), and nitrogen dioxide (NO2) are formed with low molecular weight covalent bonds They exist as gases

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Answer:

number 29 is D

Explanation: When the moon orbits the earth some of the light reflects off the moon, making it visible on the Earth.

I dont know how to answer 28 fully, is there a picture?

Answer:ultraviolet rays

Explanation:

Explanation:

Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.

Answer:

A. young, narrow

Explanation:

Correct me if I am wrong

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Answer:

six

Explanation:

check your periodic table

Answer:

Skin cells are flat and protect you!

Explanation:

Answer:

Epithelial cells are the safety shields of the body. Take another look at your hand. It is covered with epithelial cells that protect your body by being a barrier between your internal cells and the dirt and microbes in the environment.

Answer:

Because people can now see microscopic items

Explanation:

People can now see the cells because they are so small we cant see them with the enhanced microscope we can see everything that's micro

Answer:

strong winds come from the energy of a hurricane

The energy of a hurricane come from strong wind. The Taino Native American term hurricane, which translates to "bad spirit of the wind," is where the word hurricane originates.

A tropical storm that has sustained winds of 74 mph or greater is referred regarded as a hurricane. A storm's eye typically measures 20 to 30 miles in width and can reach distances of 400 miles. Storms can be dangerous because of their torrential downpours, strong gusts, and storm surges.

When warm, humid air begins to rise over water, hurricanes emerge. Cooler air replaces the rising air. Large clouds and thunderstorms continue to grow as a result of this process. Thanks to the earth's Coriolis Effect, these thunderstorms are still expanding and starting to rotate.

Thus, option B is correct.

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Answer:

a hydrogen ion will have more or fewer electrons than a standard hydrogen atom.

Explanation:

ions are atoms that have lost or gained elections. this applies to ions in general.

Answer:9.38 x 10^−3 m

Explanation:

Answer: 9.38 x 10^−3 m

Explanation:

Answer:

C:  [tex]\frac{6 mol}{2 L}[/tex]

Explanation:

we can use the molarity equation

[tex]M = \frac{mol}{L}[/tex]

so to find M we plug in what we know, which is 6 moles of NaCl and 2 L of water, which gives us:

[tex]\frac{6 mol}{2 L}[/tex]

Answer:6 mol/2L

Explanation:just took the quiz

Answer:

Sn has a different charge in each of the compounds.

+2, +4 charges, respectively.  

Explanation:

SnO has subscripts of 1, which means it takes only one of each element to make the compound.

We know that oxygen's charge is -2 from the periodic table.

In order for the compound to be neutrally charged,

Sn + O = 0

Sn - 2 = 0.

So, Sn has a +2 charge.

Likewise with the second compound, we know O has a -2 charge.

Sn + 2*(-2) = 0

Sn - 4 = 0

Sn = +4

+2 and +4 are different charges on the Sn cation.  

Answer:

= 100u. Hence 10 g = 0.1 mole. Hope it's helpful to u

Answer:

baking the dough to form the crust

In making a pizza, the process that involves a chemical change is baking the dough to form the crust.

Chemical changes occur when a substance combines with another to form an entirely new substance.

During a chemical change there is a formation of an entirely new product different from the original product.

Thus, In making a pizza, the process that involves a chemical change is baking the dough to form the crust.

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Answer:

Valency of nitrogen in the given compounds:

N₂O₃ = +3

N₂O₅ = +5

NO = +2

-TheUnknownScientist 72

Answer:

D - ingestion

Explanation:

Answer:

Oxygen is negative charge

Explanation:

And The 2 Hydrogens are positive charges

Answer:

The most common injury caused by working with machinery are cuts and burns.

Explanation:

Cuts and burns are the  most common injury caused by working with machines unsafely.

Any physiological harm to living tissue brought on by acute physical stress is referred to as an injury. An injury can be brought on by a blunt trauma, a piercing trauma, burning, exposure to chemicals, asphyxiation, or overexertion, and it can also happen accidentally. Any area of the body can become injured, and each injury has a unique set of symptoms.

Major injuries are normally treated by a medical practitioner, and the type of treatment depends considerably on the injury. The most frequent reason for accidental human injury or injury-related death is traffic crashes. Chronic conditions are different from injuries. Cuts and burns are the  most common injury caused by working with machines unsafely.

Therefore,  Cuts and burns are the  most common injury caused by working with machines unsafely.

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Answer:

In a compound, chemical energy is _____required__________ when bonds break.

Answer:

Covalent bond between identical atoms

Covalent bonds occur between identical atoms or between different atoms whose difference in electronegativity is insufficient to allow transfer of electrons to form ions. ... The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond.

Answer:

True

Explanation:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points.

Answer:

is not completely ionized in water

The ethanoic acid (acetic acid) is considered as a weak acid because it does not releases all of its hydrogen in water, rather it dissociates partially and establishes an equilibrium with its conjugate base.