what type of heat transfer takes place when you come in contact with a snow flake on a cold day?

Answers

Answer 1

Answer:

Conduction

Explanation:

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object.

Answer 2

Answer:

Conduction

Explanation:

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object.


Related Questions

mention the three colours of Zanzibar .

Answers

Answer:

horizontal tricolor with three equal-sized stripes of blue, black and green.

Explanation:

hope this is what u want

Answer: ↓

Black and Vivid Cerulean,

About The Photos: This second Photo is the flag from the 2000's I believe, and the first Photo shows the 1964 flag.

1 Aluminum reacts with oxygen to produce aluminum oxide, what is the chemical equation?​

Answers

Answer:  Aluminum reacts with oxygen to produce aluminum oxide as follows: 4Al + 3O2 → 2Al2O3 a.

Explanation: I really really hope that was helpful.

Do your answers to the previous questions satisfy
the following statements?
A) The dependent variable is changed by the
independent variable.
B) The independent variable causes a change
to another variable.
C) The independent variable is not changed by
another variable.

Answers

Answer:

I put B&C

Explanation:

With the aid of a balanced chemical equation explain Chemical Reactions and the Types Of Chemical Reaction

Answers

Answer:

Answers

1.)reactants: nitrogen and hydrogen; product: ammonia.

2.)reactants: magnesium hydroxide and nitric acid; products: magnesium nitrate and water.

3.)N 2 + 3H 2 → 2NH 3

4.)Mg(OH) 2 + 2HNO 3 → Mg(NO 3) 2 + 2H 2O.

5.)2NaClO 3 → 2NaCl + 3O 2

6.)4Al + 3O 2 → 2Al 2O 3

7.)N 2(g) + 3H 2(g) → 2NH 3(g)

Explanation:

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A chemical reaction is a process in which atoms are rearranged to form new molecules or substances. During a chemical reaction, chemical bonds are broken and formed, resulting in the transformation of reactant molecules into product molecules. The reactants and products of a chemical reaction are characterized by their chemical formulas, which describe the types and numbers of atoms present in the molecules.

A balanced chemical equation is a written representation of a chemical reaction that shows the reactants on the left side of the equation and the products on the right side. The equation is balanced by adjusting the coefficients (the numbers in front of the chemical formulas) so that the number of atoms of each element is the same on both sides of the equation. This ensures that the law of conservation of mass is obeyed, which states that matter cannot be created or destroyed during a chemical reaction.

There are several types of chemical reactions, including:

Decomposition reactions: These reactions involve the breakdown of a single compound into two or simpler substances. An example of a decomposition reaction is the thermal decomposition of water to form hydrogen and oxygen gases:

2H2O (l) -> 2H2 (g) + O2 (g)

Displacement reactions: These reactions involve the replacement of one element with another element in a compound. An example of a displacement reaction is the reaction of zinc with hydrochloric acid to form zinc chloride and hydrogen gas:

Zn (s) + 2HCl (aq) -> ZnCl2 (aq) + H2 (g)

Redox reactions: These reactions involve a transfer of electrons from one species to another. An example of a redox reaction is the reaction of magnesium with oxygen to form magnesium oxide:

2Mg (s) + O2 (g) -> 2MgO (s)

Combination reactions: These reactions involve the combination of two or more substances to form a single compound. An example of a combination reaction is the reaction of hydrogen and oxygen to form water:

2H2 (g) + O2 (g) -> 2H2O (l)

Acid-base reactions: These reactions involve the transfer of a proton from an acid to a base. An example of an acid-base reaction is the neutralization of hydrochloric acid with sodium hydroxide to form water and sodium chloride:

HCl (aq) + NaOH (aq) -> H2O (l) + NaCl (aq)

What conversion factors
determine the number of
molecules from the number of
moles of a compound?

Answers

Answer: Avogrado's number, or 6.022 x 10^23

Explanation:

To convert from moles to atoms, multiply the molar amount by Avogadro's number. To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).

35 points
What are the reactants and the products in this equation?

2H2 + O2 → 2H2O


a Reactants: water; Products: hydrogen, oxygen

b Reactants: hydrogen, oxygen; Products: water

Answers

Answer:

02 ;D h2oooooooooooo

long story shortB

Explanation:

Answer:

B

Explanation:

2H2→Hydrogen peroxide

O2→oxygen

"A water molecule (formally known as dihydrogen monoxide) is composed of two hydrogen atoms and one oxygen atom. ... The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy"

"A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction."

The answer is B, hope this helps :)

The contents of a bucket filled from a well were in a ____ stat. If the contents were heated up enough, they would change to a ____ state.

Answers

Answer: liquid state

A gas state

Explanation:

A wave has a frequency of 46 Hz and a wavelength of 2.3 meters. What is the speed of the
wave?

Answers

Answer:

105.8 m/s

Explanation:

V = f * w

Where V is the velocity (m/s)

f is the frequency (hz)

w is the wavelength (m)

How many grams of MgO are in 3.500 moles?

Answers

(3.500 mol MgO)(40.3044g MgO/1mol MgO)
=141.0654

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, lead has the highest mass. 141.05gram of MgO are in 3.500 moles.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. 141.05gram is the mass of  MgO.

Mathematically, the molar mass, mole and given mass can be related as

Mole of MgO =given mass of  MgO ÷ molar mass of  MgO

Molar mass of MgO= 40.30 g/mol

Mole of MgO= 3.500 moles

substituting the values, we get

3.500 moles = mass of MgO÷ 40.30 g/mol

Mass of MgO=141.05gram

Therefore, 141.05gram of MgO are in 3.500 moles.

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what is the charge on a calcium (Ca) atom that contains 18e?

Answers

Answer:

Ca2+

Explanation:

the charge on a calcium (Ca) atom that contains 18e is 2+

I don't really understand this worksheet question.​

Answers

25/2 and 96/X
CROSS MULTIPLY.

2x=2,400.
divide by 2.
x=1,200.

you take the GIVEN MASS of an element, and you put it on top, the coefficient is what it’s over. i believe this is right

For many plants, carbon dioxide is a limiting factor.

What happens when more carbon dioxide is available to plants?

1.Plant growth increases.
2.Plant growth stays the same.
3.Plant growth decreases.
4.Plant growth may increase or decrease.

Answers

Answer:

1

Explanation:

plants use carbon dioxide and if there is more then that mean the plants will have more to use and will grow faster and populate more


1. To calculate the molarity of a solution, you need to know the moles of solute and the
O volume of the solvents
O mass of the solution
O volume of the solution
volume of the solute

Answers

Answer:

O volume of the solution

Explanation:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / volume of solution  in L

For example:

if we dissolve the 1 mole of NaCl to make the solution of volume 2 L. The molarity of solution is,

M = 1 mol / 2 L

M = 0.5 M

____ Al(NO3)3 + ____ FeCl2 --> _____ Fe(NO3)2 + ______AlCl3
~
how to fix/ balance this chemical reaction?

Answers

The balanced equation

2Al(NO₃)₃ +  3FeCl₂ ⇒ 3Fe(NO₃)₂ + 2AlCl₃

Further explanation

Given

Reaction

Al(NO₃)₃ +  FeCl₂ --> Fe(NO₃)₂ + AlCl₃

Required

Balanced equation

Solution

Give a coefficient

aAl(NO₃)₃ +  bFeCl₂ --> Fe(NO₃)₂ + cAlCl₃

Make an equation

Fe, left=b, right=1⇒b=1

N, left=3a, right=2⇒3a=2⇒a=2/3

Cl, left=2b, right=3c⇒2b=3c⇒2.1=3c⇒c=2/3

The equation becomes :

2/3Al(NO₃)₃ +  FeCl₂ --> Fe(NO₃)₂ + 2/3AlCl₃ x3

2Al(NO₃)₃ +  3FeCl₂ --> 3Fe(NO₃)₂ + 2AlCl₃

how many grams of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate?

Answers

Answer: 212 g  of sodium carbonate must react

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

The balanced chemical equation is:

[tex]Na_2CO_3+CaCl_2\rightarrow 2NaCl+CaCO_3[/tex]

Mass of products = mass of  sodium chloride + mass of  calcium carbonate = 233 g+ 201 g= 434 g

Mass of reactants= mass of sodium carbonate  + mass of calcium chloride =x + 222 g

As the mass of reactants should be equal to mass of products

434  = x  + 222 g

x = 212 g

Thus 212 g  of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate

On the periodic table, all of the elements in Group 1 are ____________
a) considered pure.
b) do not form chemical bonds.
c) have the same number of valence electrons. ​

Answers

they have the same number of valence electrons

pls helpppp
Is the law of conservation of mass observed in each equation?

1. 2KClO3=2KCl+3O2

2. CaCO3+2HCl=CaCl2+H2O+CO2

Answers

Answer:

its c my guy

Explanation:

Which of the following halogens has the weakest attraction for electrons?


I


F


Br


Cl

Answers

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.

As you go down the periodic group the electronegativity decreases. The most electronegative element on the periodic table is fluorine. Down the group, iodine is the least electronegativeThis is due to the large size of its atom.

can someone please help me solve this? i dont understand this problem :(

Answers

Answer:

–4020 KJ

Explanation:

The following data were obtained from the question:

H₂(g) + F₂(g) —> 2HF(g) ΔH = –536 KJ

Next, we shall determine the mass of H₂ that reacted from the balanced equation to produce –536 KJ of heat energy. This can be obtained as follow:

Molar mass of H₂ = 2 × 1 = 2 g/mol

Mass of H₂ from the balanced equation = 1 × 2 = 2 g.

Summary:

From the balanced equation above,

2 g of H₂ reacted to produce –536 KJ of heat energy.

Finally, we shall determine the heat change produced by the reaction of 15 g of H₂. This can be obtained as follow:

From the balanced equation above,

2 g of H₂ reacted to produce –536 KJ of heat energy.

Therefore, 15 g of H₂ will react to produce = (15 × –536)/2 = –4020 KJ of heat energy.

Thus, the heat change for the reaction is –4020 KJ

How many molecules are there in 31.8 moles of water?
1.91 x 1025 molecules
1.91 x 1022
5.28 x 10-23 molecules
5.28x 10.25

Answers

Answer:

[tex]31.8\ moles = 1.91 * 10^{25}\ molecules[/tex]

Explanation:

Given

31.8 moles of water

Required

Determine the number of molecule

In standard units: 1 molecule of water is:

[tex]1\ mole = 6.022 * 10^{23}\ molecules[/tex]

Multiply both sides by 31.8

[tex]31.8 * 1\ mole = 31.8 * 6.022 * 10^{23}\ molecules[/tex]

[tex]31.8\ moles = 31.8 * 6.022 * 10^{23}\ molecules[/tex]

[tex]31.8\ moles = 191.4996 * 10^{23}\ molecules[/tex]

Express 191.4996 as a standard form

[tex]31.8\ moles = 1.914996 * 10^2 * 10^{23}\ molecules[/tex]

Apply law of indices:

[tex]31.8\ moles = 1.914996 * 10^{2+23}\ molecules[/tex]

[tex]31.8\ moles = 1.914996 * 10^{25}\ molecules[/tex]

Approximate:

[tex]31.8\ moles = 1.91 * 10^{25}\ molecules[/tex]



Miley partridge if you see this I am CJ and these hearts are for you ❤❤❤❤❤❤

Answers

Answer: not to be rude but who is Miley partridge? If she is a friend then u r a kind hearted person

Explanation:

awww that is so sweet !

Convert 4.5 x 10-3 to standard Notation
Posted today at 6:30 am
1
=

Answers

Answer:

0.0045

Explanation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

for example 4.5×10⁻³

In standard notation

4.5 / 10³

0.0045

The expanded notation is standard notation of writing the numerical values which is normal way. The numbers are written as they are, without the power of 10.

How did Wegener use fossils as evidence that continents had moved?

Answers

Answer: Because the same Fossils were found on other continents.

Explanation:

The world used to be connected but then what I call the Continental Drift started and the world broke apart, along with the dinosaurs splitting in two or more packs.

What force pulled the solar system together out of a cloud of gas and dust

Answers

gravity
Approximately 4.5 billion years ago, gravity pulled a cloud of dust and gas together to form our solar system.

Question 7 of 10
Which of the following elements has the largest first ionization energy?
A. Boron (B)
B. Oxygen (0)
C. Carbon (C)
D. Nitrogen (N)

Answers

The answer should be B. Oxygen

What is the relationship between specific heat and the rate of heating?

Answers

Answer:

the rate of heat transfer is directly proportional to the mass flow rate.

Explanation:

There is an elementary equation from basic thermodynamics that states that the rate of heat transfer (Q) equals the mass flow rate (M) times a Constant (the specific heat of water) times the Delta T (fluid temp out minus fluid temp in): Q = M x C x Delta T In other words, the rate of heat transfer is directly proportional to the mass flow rate.


What is one effect of the uneven heating of Earth caused by the Sun? (Answer with a 5 sentence paragraph)
ene
(This is scinece

Answers

Answer:

Albedo

Explanation:

Usually when we talk about uneven heating of the Earth's surface we are discussing convection. The uneven heating results in some of the atmosphere to be warmer than other parts and changes in volume and pressure which result in updrafts and can cause thunderstorms and other violent weather. The cause of this is the reflectiveness of the surface of the Earth at that point (the albedo) and the angle that the sun's rays strike it at. A field covered with snow and ice is going to be much more reflective than a black top asphalt parking lot. As such the parking lot absorbs much more shortwave radiation from the sun and gets much warmer.

The uneven heating of Earth caused by the Sun craetes the difference in the atmosphere pressure and the volume of gasses present in atmosphere.

What is uneven heating of Earth?

The uneven heating in the atmosphere disturbs the climatic conditions as there are some areas which are cold and some are hot then before and also changes the volume and pressure.

The change in the volume and the pressure results in the flow of the upward flow of the current air which is the main cause of thunder storm and some other climatic disaster can also happen.

Therefore,  uneven heating of Earth caused by the Sun craetes the difference in the atmosphere pressure and the volume of gasses present in atmosphere.

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Answer this please if you do i will give you brainilset if you get it correct

Answers

Answer:

D

Explanation:

anyone know how to do this?

Answers

Answer:

2X₂Y₃    →     4X     +     3Y₂

Explanation:

This problem is about balancing chemical equations.

The reaction is given as:

          X₂Y₃    →     X     +     Y₂

To balance the reaction equation, we use a mathematical approach.

      aX₂Y₃    →     bX     +     cY₂

Conserving X;   2a  = b

                    Y;   3a = 2c

Now, let us make a  = 1

                              b  = 2

                              c  = [tex]\frac{3}{2}[/tex]  

Multiply through by 2;

         a  = 2, b  = 4 , c  = 3;

        2X₂Y₃    →     4X     +     3Y₂

 

What is the conversion for 2.0 m x 5.0 m =

Answers

2.0 m x 5.0 m =

Answer: 10.0 m
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