HELP! PLZZ! NEED THIS DONE ASAP!

Answer: the answer is force

Explanation:

Answer:

D.

Explanation:

Translation:

A. make a barbecue

B. organize a picnic

C. swimming in the pool

D. to go skiing

Barbecue is usually a summer activity, so we eliminate that.

It would be too cold for a picnic!

It would be too cold to go swimming, and that's more of a summer thing!

Skiing is a snow activity, and since it is winter, it is likely to know.

Answer: Earth's average albedo is about 0.3. In other words, about 30 percent of incoming solar radiation is reflected back into space and 70 percent is absorbed. A sensor aboard NASA's Terra satellite is now collecting detailed measurements of how much sunlight the earth's surface reflects back up into the atmosphere.

Explanation: ik im annoying thanks

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\ [/tex]

So we have

[tex]volume = \frac{220}{11} \\ [/tex]

We have the final answer as

Hope this helps you

the two middle ones is the answer

Answer:

2 in each

Explanation:

Answer:

C. Malleability

Explanation:

The malleability of aluminum allows it to be formed into thin sheets.

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

Answer:

C

Explanation:

Answer:

[tex]4.7 * 10^{-7} meters[/tex]

Explanation:

Angstrom can be defined as a metric unit of length for used for the measurement of the wavelength of light (optics) such as visible light, x-rays, ultraviolet light, gamma rays etc. The symbol for Angstrom is "A" and it is named after the 19th century physicist from Sweden, named Anders Jonas Angstrom.

Given the following data;

Wavelength of spectral line = 4700A

To convert this value to meters;

One Angstrom is mathematically equal to [tex] 10^{-10} meters [/tex]

[tex] 1 Angstrom = 10^{-10} meters[/tex]

[tex] 4700 Angstrom = X \; meters[/tex]

Cross multiplying, we have;

[tex] X = 4700 * 10^{-10}[/tex]

X =  [tex]4.7 * 10^{-7} meters[/tex]

Therefore, 4700A is equal to 4.7e-7 or 0.00000047 meters.

Answer:

Gravity

Explanation:

According to Newton's Law of Gravity, an object with mass will attract another object with mass.

Answer: Salt is primarily composed of sodium chloride.

Explanation:

Answer:

False. Chemical changes are always physical changes

Answer:

False

Explanation:

answer: 1.83 to 1

or at least that’s what i got

Answer:

1.) Liquid

2.) Powder

3.) No ( Not A Solid)

Explanation:

When substance put in a 25 mL beaker. than state of matter will be solid , appearance and texture will be powdered and  crystalline structure will be powdered.

A state of matter was one of many different shapes that matter can take. In daily life, four states of matter were visible: solid, liquid, gas, but also plasma.

What is crystalline structure?

The organized configuration of atoms, ions, and even molecules in such a crystalline material is usually referred to as crystalline structure.

Therefore,

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Answer:

everything including the space...

hope it helps...

physical property is conductivity

Answer:

1

Explanation:

you would take 4 subtract 0 which is 4 and divide it by 4 which is 1

Answer:

Air from the trumpet moved it

Explanation:

CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2

2Al + 3Cl₂ --------->2AlCl3

Ag + HCl ------->AgCl + H2

C2H2 + 5O2 --------> 4CO2 + 2H2O

MgCl₂ --------->Mg + Cl2

Answer:

Explanation:

Definition of Prokaryote. a single-celled organism (such as bacteria) that lacks a nucleus and cannot be seen with the naked eye. Examples of Prokaryote in a sentence. 1. The scientist studied the prokaryote under the microscope to see if its single-cell would multiply in certain conditions.

Hope this helps!

Prokaryotes are a single celled organism that is microscopic. They do not have a distinct nucleus with a membrane. They don't have other specialized organelles either. They also include bacteria and archaea.

"Prokaryotes are so small you cant see them with the bare human eye!"

[tex]\boxed{I\;hope\;it\;helps!}[/tex]

<3

Answer:

0.00025 m3

Explanation:

it just is; used conversion table

Option C, slopes are same but y intercepts are different is the correct answer

Answer:

Protons and Neutrons

Explanation:

Answer:

The answer is A

Explanation:

My teacher gave me the answer before the test that we took on 11/12/2020

Hope this helps anyone else who has the same question.

The halogens have similar properties, the correct option is A.

Halogens are the group 17th compound of the periodic table, It consists of elements like Fluorine(F), Chlorine(Cl), Bromine(Br), and Lodine(I).

The halogens have the following properties.

They all react with hydrogen to create acids.

All of them are fairly harmful.

Salts are easily formed when they react with metals.

Their outer shell contains seven valence electrons.

They are electronegative and very reactive.

Low melting and boiling points characterize the halogens. This is a common characteristic of non-metals.

As you move lower in the group, the melting and boiling points then rise.

The elements have different atomic mass, atomic radius, and a different number of protons.

They are grouped together because they all have similar properties.

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Answer:

[He] 2s² 2p⁴

Explanation:

If you're looking for the answer in subshell form, here it is:

[tex]1sx^{2} 2sx^{2} px^{4} (2.6)[/tex]

Quote:

"Where I walk, I walk alone. Where I fight, I fight alone."

- Akuma

Answer:

Nitrogen

Explanation:

:) pls mark brainliest

Answer:

Nitrogen

Explanation:

To find your answer, pay attention to the number of protons. Protons define an element's atomic number.

2 HClO(aq) + Ca(OH)2(aq) = 2 H2O(l) + Ca(ClO)2(aq) is the balanced equation

Answer:The atoms in gases are far apart from each other, so they are much more disordered than either liquids or solids.

Explanation:

Answer:

6

Explanation:

To determine the number of neutrons we round 10.8 to 11 and subtract the atomic number (5) and get 6; therefore, boron has 6 neutrons.

Answer:

Its right

Explanation:

The chemical formula of calcium dichromate is CaCr207

Answer:

Option D is correct.

H₂O + CO₂      →    H₂CO₃

Explanation:

First of all we will get to know what law of conservation of mass states.

According to this law, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

Example:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

Now we will apply this law to given chemical equations:

A) H₂ + O₂   →    H₂O

There are two hydrogen and two oxygen atoms present on left side while on right side only one oxygen and two hydrogen atoms are present so mass in not conserved. This equation not follow the law of conservation of mass.

B) Mg + HCl   →   H₂ + MgCl₂

In this equation one Mg, one H and one Cl atoms are present on left side while on right side two hydrogen, one Mg and two chlorine atoms are present. This equation also not follow the law of conservation of mass.

C) KClO₃      →     KCl + O₂

There are one K, one Cl and three O atoms are present on left side of chemical equation while on right side one K one Cl and two oxygen atoms are present. This equation also not following the law of conservation of mass.

D)  H₂O + CO₂      →    H₂CO₃

There are two hydrogen, one carbon and three oxygen atoms are present on both side of equation thus, mass remain conserved. Thus is correct option.

The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.

The conservation of mass states that the mass of the reactant and products has been equal. The mass can be calculated in terms of the number of atoms.

(A) [tex]\rm H_2\;+\;O_2\;\rightarrow\;H_2O[/tex]

The number of atoms of Hydrogen:

Reactant = 2

Product = 2

The number of atoms of Oxygen:

Reactant = 2

Product = 1

The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.

(B) [tex]\rm Mg\;+\;HCl\;\rightarrow\;H_2\;+\;MgCl_2[/tex]

The number of atoms of Mg:

Reactant = 1

Product = 1

The number of atoms of H:

Reactant = 1

Product = 2

The number of atoms of Cl:

Reactant = 1

Product = 2

The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.

(C) [tex]\rm KClO_3\;\rightarrow\;KCl\;+\;O_2[/tex]

The number of atoms of K:

Reactant = 1

Product = 1

The number of atoms of Cl:

Reactant = 1

Product = 1

The number of atoms of O:

Reactant = 3

Product = 2

The number of atoms of products and reactant is not equal, Thus, the reaction did not follow the conservation of mass.

(D) [tex]\rm H_2O\;+\;CO_2\;\rightarrow\;H_2CO_3[/tex]

The number of atoms of H:

Reactant = 2

Product = 2

The number of atoms of O:

Reactant = 3

Product = 3

The number of atoms of C:

Reactant = 1

Product = 1

The number of atoms of products and reactant is equal, Thus, the reaction follows the conservation of mass.

The chemical reaction that follows the conservation of mass has been the formation of hydrogen carbonate. Thus, option D is correct.

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