What are the opposites?

Answer:

b is correct

Explanation:

Answer:

B.  state matter change from solid to liquid.

Explanation:

Melting happens when a solid turns (melts) into a liquid.

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When you have collected a lot of data most likely need to use a computer to analyze data. Option B is correct.

The analyzed data is a system in which the unmanaged data or the messy data can be arranged in a recognizable sequence for the better study of something for which data is to be maintained.

The computer is needed for the process as the computer has some special characters to maintain tables according to alphabets and according to the number and can be taken out anytime want.

Therefore, Option B is correct. When you have collected a lot of data most likely need to use a computer to analyze the data.

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Answer:

The virus's genome is uncoated from the protein and injected into the host cell.

Explanation:

Answer:

[tex]thank \: yo[/tex]

Answer:

B. as a food preservative in the manufacture of detergents

.........

Answer:

Chemical change.

Hope this helps you.

Answer:

3.99 × 10 ^-28

Explanation:

In the equation of E = hc/λ, the h = 6.626 × 10^−34 J and c = 3 × 10^8 m/s

E =  6.626 × 10^−34 × 3 × 10^8 divided by 498

E = 3.99 × 10 ^-28

Explanation:

Neon is [Ne] 3s2 3p3 = 1s2 2s2 2p6 3s2 3p3.

Answer:

potassium hydroxide + sulfuric acid → potassium sulfate + water.

Explanation:

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because it doesn't react easily with other elements it requires high heat and other things

Answer: The answer is ‘a neutral atom gained 2 electrons’

Explanation: Because electrons are negatively charged and adding 2 extra would make the ion negatively charged by 2

Answer:

The answer to all the quiz questions are

Explanation:

1. Which statement describes the number of protons in each atom of an element?

*The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.*

2. An element has an atomic number of 16. An ion of this element has a 2– charge. How was the ion formed?

*A neutral atom gained 2 electrons.*

3. Rubidium has an atomic number of 37 and a mass number of 85. How many protons, neutrons, and electrons does an ion of rubidium with a 1+ charge have?

*37 protons, 48 neutrons, and 36 electrons*

4. There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true?

*Their atomic masses differ.*

5. Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?

*5*

Explanation:

basically, you'll just have to convert the given grams into moles, convert that into moles of Br, and then convert it again into grams of Br

The amount of gram of [tex]Br_{2}[/tex] will be  65.1 grams in equation [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].

The definition of a gram was given as the mass of one cubic centimeter of pure water at 4 degrees Celsius.

Calculation of amount of  [tex]Br_{2}[/tex]

The given equation is [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].

The mass of  [tex]Br_{2}[/tex]  = Count of bromine molecule × molar mass

The mass of  [tex]Br_{2}[/tex]   = 0.4072 × 159.8

The mass of  [tex]Br_{2}[/tex]   = 65.08 mol.

The amount of gram of  [tex]Br_{2}[/tex]  will be  65.1 grams in equation  [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].

Therefore, the answer will be option (a).

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Answer:

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Answer: a

Explanation:

i took the test

Answer:

Descriptive investigations use careful observations and measurements to develop findings. Science journals, science logs, and field notebooks are some of the tools scientists use to gather information for descriptive investigations.

Explanation:

Answer:

Synthesis reaction is 2 or more chemical combing to form  complex product (A+B→AB)

Decomposition occurs when one reactant breaks down into 2 or more products (H2CO3→H2O+CO2)  

Single replacement is a reaction when one element is substituted for another element compound.                                                   (A+BC→ AC+B)

Double replacement occur when parts of 2 ionic compounds are exchanged making two new compounds .(A+B - + C + D- → A+D- +C )

The activation energy of the particular reaction will determines the rate at which it will go. The higher the activation energy gets, the slower the chemical reaction will become.  

Explanation:

Answer:

Use filtration method lol.

Answer:

3). C

Explanation:

When inter-nuclear distance [ atomic radius ] is smaller, the nuclear attraction has a greater magnitude.

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Answer:

Explanation:s the gravitational field strength on Earth's 9.8 N kg?

The gravitational field strength of the Earth is 10 N/kg (10 newtons per kilogram).

Answer:

d

Explanation:

b/ce The strong force effects produce a mass that is essentially independent of the kinds of quarks involved, so this mass contribution will be the same for the proton and neutron.

Answer:

This is an English server, sorry

Explanation:

Answer:

Well in short, if u want more explanation u can ask

1. Only one side benefits

2. Plants needs sunlight for photosynthesis, so if a large plant is blocking all that sunlight, that small plants won't have sufficient sunlight

1) The predator or parasite both derive nutrients from the other organism.

Usually predators quickly kill the prey while parasites slowly weaken or kill their host

2) The plant blocks sunlight from reaching smaller plants. This is an issue because

without the sun, plants can't get the food they need to grow, reproduce and survive. This hinders their ability to photosynthesize

3) fox and rabbit

flower and bee

whales and barnacles

dog and tick

Answer:

l think it's hydrogen chloride

Explanation:

Answer: it's group 14

Explanation:

The common group name for carbon is Group 14 (IVa) on the periodic table.

Nitrogen exists as a diatomic molecule, N2 (subscript 2). It exists as a gas at room temperature because of the type of interactions with other identical molecules: weak intermolecular forces are present between the molecules, specifically temporary dipole-dipole interactions.

These interactions are the second weakest type of intermolecular force (Van Der Waals and Hydrogen Bonds are the other two with Hydrogen Bonds being stronger).

Now the reason why Nitrogen exists as gas is that these weak intermolecular forces can be overcome with little energy. Therefore, at room temperature, Nitrogen exists as a gas.

Nitrogen has a low melting and boiling point and is a gas at room temperature. The Earth's atmosphere is made up of 78% nitrogen. The next most common gas is oxygen, at 21%. Nitrogen isn't very reactive, but it can react with oxygen at high temperatures, such as in-car engines.

Nitrogen forms an extensive series of nitrides with carbon, including those with chain-, graphitic-, and fullerene-like structures.

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Taking into account the definition of density, the density of the liquid is 0.76 [tex]\frac{g}{mL}[/tex].

First of all, density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

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

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know:

So, replacing in the definition of density:

[tex]density= \frac{19 g}{25 mL}[/tex]

Solving:

[tex]density= 0.76 \frac{g}{mL}[/tex]

Finally, the density of the liquid is 0.76 [tex]\frac{g}{mL}[/tex].

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C2H2 will be left  when the burning is complete.

The equation of the reaction is; 2C2H2 + 5O2 --> 4CO2 + 2H2O

The number of moles of C2H2 reacting is = 1.20 g/26 g/mol = 0.046 moles

The number of moles of O2 is = 3.50 g/32 g/mol = 0.109 moles

Since;

2 mole of C2H2 reacts with 5 moles of O2

x moles of C2H2 reacts with 0.109 moles of O2

x = 2 mole × 0.109 moles/5 moles

x = 0.044 moles of C2H2.

It then follows that C2H2 is the reactant in excess so C2H2  will be left  when the burning is complete.

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Answer:

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Explanation:

Oxygen

Answer:

4

Explanation:

If there is 12 boxs that cost $48, you need to divide the 12 boxs into the $48 to see how many time 12 goes into it to see how much it is. So 48 divided by 12 is 4.