Can you please help me with this question

Answer:

B.

Explanation:

Answer:

we need to know it's

mass and velocity

Explanation:

then use the formula of kinetic energy

Answer:

Mass and velocity (or motion).

Explanation:

KE=(1/2)mv^2.

The kinetic energy of an object is the amount of work (expended energy) that's required to move (or more accurately, to accelerate) the object to a specific velocity.  So, if you know the mass of the object, and you know it's current velocity, you can determine it's kinetic energy with the formula above.

Answer:

Possibly a bad reaction as some people's immune systems are weaker than others

Explanation:

Answer:

Subtract the number of electrons from the number of protons in an atom as a basic way of calculating the charge of the ion.

Explanation:

For example, if a sodium atom loses one electron, work out 11 - 10 = 1.

Answer:

2NaI + F₂    →     2NaF + I₂

Explanation:

Chemical equation:

NaI + F₂    →     NaF + I₂

Balanced chemical equation:

2NaI + F₂    →     2NaF + I₂

The given reaction is single replacement reaction.

Step 1:

NaI + F₂    →     NaF + I₂

left hand side                    Right hand side

Na = 1                            Na = 1

I = I                                 I  = 2

F = 2                               F = 1

Step 2:

2NaI + F₂    →     NaF + I₂

left hand side                    Right hand side

Na = 2                                Na = 1

I = 2                                   I  = 2

F = 2                                  F = 1

Step 3:

2NaI + F₂    →     2NaF + I₂

left hand side                    Right hand side

Na = 2                                Na = 2

I = 2                                    I  = 2

F = 2                                   F = 2

Answer:

18.01528 grams.

Explanation:

Ther are 0.84 moles of [tex]H_{2}O[/tex] in 15.2 g of pure ice.

The molar mass of [tex]H_{2}O[/tex] is 18g.

To calculate the number of moles of a substance in a given mass of the sample, we divide the given mass by the molar mass of the sample,

Number of moles = given mass / molar mass

It is given that we have 15.2g of pure ice. Then the number of moles of [tex]H_{2}O[/tex] will be:

n = 15.2/18

n = 0.84 moles.

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Answer: Rift zones are common places for igneous rock to form because the pulling apart of rocks decreased the pressure on buried rocks.

Explanation: magma can then form and solidify.

Answer:

Potassium: 1 Stratum: 2 Sodium: 1 Copper: 11 Calcium: 2 Lithium:1

Explanation:

The groups are columns on the periodic table

Answer:

im pretty sure the answer to your question is false sorry if its wrong.

Explanation:

Answer:

Mass of CO₂ produced = 299.64 g  

Explanation:

Given data:

Mass of CO₂ produced = ?

Mass of propane (C₃H₈) = 100.0 g

Solution:

Chemical equation:

C₃H₈ + 5O₂     →        3CO₂ + 4H₂O

Number of moles of propane:

Number of moles = mass/molar mass

Number of moles = 100.0 g/  44.1 g/mol

Number of moles = 2.27 mol

Now we will compare the moles of propane and carbon dioxide.

                 C₃H₈          :          CO₂

                    1              :            3

                  2.27          :           3/1×2.27  = 6.81 mol

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 6.81 mol × 44 g/mol

Mass = 299.64 g  

Melting ice cubes. Melting solid salts. Evaporating liquid water

Answer:

ham nahi jante hai be happy

Answer:

29.76ºC

Explanation:

The melting point is a physical property of the matter it doesn't change as you slice the gallium into three different parts. Thus, it's the same value 29.76ºC

Explanation:

charge = proton - electron

charge = 65-63

charge = +2

Answer:here is ur answer....

Explanation:

C) 2+

Answer:

Question 4 is 291.0346

Explanation:

Answer:

An ionic bond is formed by the complete transfer of some electrons from one atom to another. The atom losing one or more electrons becomes a cation or a positively charged ion. The atom gaining one or more electrons becomes an anion which is a negatively charged ion.

Answer:

I NEED TO KNOW THIS TOO

Explanation:

IVE BEEN LOOKING FOR THE ANSWER

Answer:

i would say B? Im sorry if im wrong

Explanation:

i think that because Catabolic reactions release energy, while anabolic reactions use up energy. Anabolism is the opposite of catabolism.

Answer:

B) In anabolism, energy is absorbed.

Answer:

I

Explanation:

Among the halogens given in this problem, iodine has the lowest attraction for electrons.

This property is known as electronegativity.

Electronegativity is expressed as the relative tendency with which the atoms of the element attracts valence electrons in a chemical bond.

Answer:

pretty sure its C

Explanation:

Democritus was all about the consept f tiny indestructible partivls called atoms so C is the only one that doesn' t fit

Answer:

I'm pretty sure it's A

Answer:

Halogens i think. hope this help

Explanation:

Answer:

In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

Explanation:

hope this helps

When bonds between molecules or atoms are created, disrupted, or both, chemical changes result. This implies that a material is changed from one with a certain set of attributes into another with a different set of properties.

Each atom is made up of a nucleus and one or more electrons that are linked to it. One or more protons and a significant number of neutrons make up the nucleus. Only the most prevalent kind of hydrogen is neutron-free. The smallest component of ordinary stuff that makes up a chemical element is an atom.

An atom's nucleus is surrounded by an area of electrons. The electrical charge of every electron is negative one. Protons and neutrons, which together make up an atom's nucleus, are made of quarks.

The atoms in the reactants rearrange and link with one another differently to create one or more new products that vary from the reactants in several ways.

Thus, When bonds between molecules or atoms are created, disrupted, or both, chemical changes occur.

To learn more about an atom, follow the link;

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Answer:

320pka

Explanation:

This is a complete question;

If the temperature of a gas increased from 100 K to 200 K and the volume of a gas decreased from 20 L to 10 L, what is the new pressure if the original pressure was 80kPa?

EXPLANATION;

Gas laws can be regarded as aws which relate the pressure, volume, as well as temperature of a gas. It can be expressed as

P1V1/T1 = P2V2/T2

Where

V1= initial volume= 20L

V2 = final volume= 10L

T1 = initial temperature= 100K

T2 = final temperature= 200K

P2=final pressure=

P1= initial pressure= 80pka

Making P2 subject of the formula from the eqn, we have

P2= (P1*V1*T2=)/(T1*V2)

If we substitute the values we have

P2= (80 × 20×200)/(100×10)

P2= 320pka

Hence, the new pressure is 320pka

Answer:

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Answer:

The relative velocity is the velocity of an object or observer B in the rest frame of another object or observer A.

Answer:

Relative motion is defined as the calculation of the motion of an object with regard to some other moving or static object. Thus, the motion is not calculated with reference to the earth, but is the velocity of the object in reference to the other moving object as if it were in a static state.

Explanation:

Answer:

C!!!!!!!!!!!!!!!!!!!!

Explanation:

Hope this helps!!!!!!!!!

I'm pretty sure it's a series circuit because all components are connected end-to-end, forming a single path for current flow.

Answer:  lone pair of electrons

Explanation: A bonding electron domain is a pair of electrons shared between two atoms and a nonbonding is a lone pair of electrons

The difference between the bonding electron domain and a nonbonding electron domain should be explained below.

A bonding electron domain refers to the region that lies between the two bonded atoms that comprise one or more pairs where the electrons should be bonded.

While on the other hand, the non-bonded electron contains on the single-atom also comprise of one pair of lone pair.

In this way, it should be differentiated.

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Answer:

#1

The temperature that this happens is called the freezing point and is the same temperature as the melting point. As more energy is put into the system, the water heats up, the molecules begin moving faster and faster until there is finally enough energy in the system to totally overcome the attractive forces.

Explanation:

#2

Heating a liquid increases the speed of the molecules. An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. ... A decrease in the speed of the molecules allows the attractions between molecules to bring them a little closer together.