Chemistry High School

How is heat transferred through space

Answers

Answer 1

Heat is transferred by energy waves moving through space. Explanation: According to research: Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible

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Answer 2

Answer:

the transfer of energy through space is called radiation. through radiation there is no direct contact between heat source and object. sunlight radiation warms the earth's surface; radiation can also come from fires.

Related Questions

Which state or states of matter have fixed volume but not a fixed shape?

Answers

Answer:

gas and liquid

Explanation:

Why don't we feel the air pressing on us all the time?

Answers

Answer: Why don't we feel the air pressing on us all the time?

Explanation:

Because air is a fluid, the weight of the air is transmitted to the palm of your hand and to the back of your hand at the same time. These forces cancel so that your hand overall feels no net force

Answer:the gravity in the atmosphere is pulling all the air so we can survive

Explanation:

A water molecule is held together by ___ covalent bonds,
meaning there are a total of __shared electrons in the
molecule.

Answers

2 covalent bonds

2 pairs or 4 electrons

Dana is playing with her friends. They ride their scooters 20 meters down the road North. They stop to grab a drink of water. Feeling tired, they turn around and ride their scooters 20 meters south
What is Dana and her friend’s displacement

Answers

Answer:

what is the displacement

Explanation:

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A 10.0 g sample containing calcium carbonate (CaCO3) and an unreactive material was placed in excess hydrochloric acid, HCl. A reaction occurred, producing calcium chloride (CaCl2), water, and carbon dioxide. (a) write a balanced equation for the reaction (b) when the reaction was complete, 800 mL of carbon dioxide gas was collected. How many moles of calcium carbonate were used in the creation? (c) How many grams of CaCO3 were used? (d) If there was another contaminant in the sample that was not unreactive, would this have caused the percent yield of carbon dioxide to be higher, lower, or the same, explain your answer.

Answers

Explanation:

(a) write a balanced equation for the reaction

CaCO3 + HCl --> CaCl2 + H2O + CO2

The balanced equation is given as;

CaCO3 + 2HCl → CaCl2 + H2O + CO2  

(b) when the reaction was complete, 800 mL of carbon dioxide gas was collected. How many moles of calcium carbonate were used in the creation?

From the balanced reaction;

1 mol of CaCO3 reacts to produce 1 mol of CO2

1 mol of CO2 = 22.4 L of CO2

This means;

1 mol of CaCO3 reacts to produce 22.4L  of CO2

x mol would produce 800ml (0.8 L) of CO2

1 = 22.4

x = 0.8

x = 0.8 * 1 / 22.4 = 0.0357 mol

(c) How many grams of CaCO3 were used?

Mass = Number of moles * Molar mass

Molar mass of CaCO3 = 100.0869 g/mol

Mass = 0.0357 mol * 100.0869 g/mol = 3.57 g

(d) If there was another contaminant in the sample that was not un reactive, would this have caused the percent yield of carbon dioxide to be higher, lower, or the same, explain your answer.

The same

An un reactive contaminant in the sample is most likely a catalyst. Catalysts only affect the rate of reaction. They do not affect yields of products.

In an exothermic reaction, the average kinetic energy of the particles of matter ib the products _____
1. decreases
2.stays the same
3. increases ​

Answers

Answer:

decreases

Explanation:

I'm hope it's correct

When there is an exothermic reaction so here the average kinetic energy of the particles of matter ib the products is option 1. decrease.

What is an exothermic reaction?

In terms of thermochemistry, an exothermic reaction means the reaction where the total standard enthalpy should change so ΔH⚬ is negative. Also it should be release heat.

So based on this, When there is an exothermic reaction so here the average kinetic energy of the particles of matter ib the products is option 1. decrease.

Learn more about reaction here: https://brainly.com/question/18358257

Learning Task 2: Fill in the blanks. Write your answers
​

Answers

1.roots of the sea 2aquatic 3marine4breeding ground5costal

What is the relationship between a front and cloud formation?

Answers

Answer:

Weather fronts can cause clouds to form. Fronts occur when two large masses of air collide at the Earth's surface. Warm fronts produce clouds when warm air replaces cold air by sliding above it.

Explanation:

Metals usually bend without breaking
while gems usually break in a specific pattern. What might be happening
to the bonds between the atoms in these materials that can explain this
difference?

Answers

Metals and gems have different properties in them which causes them to react in a such way.

We have that For a metal to metal  metallic bond the atoms are arranged in a very compact manner ,This help for metals to move over each other in case of a bend.While gem atom don't same attribute.

From the question we are told

Metals usually bend without breaking

while gems usually break in a specific pattern. What might be happening

to the bonds between the atoms in these materials that can explain this

difference?

Generally

Metals are elements that form positive ionsMetals tend  to engage in variant types of bondsFor a metal to metal  metallic bond the atoms are arranged in a very compact manner This help for metals to move over each other in case of a bend.Hence, Metals don't break upon a bend

Gems, on the other hand break on impact be cause of the bonding between them.Most gems use an ionic bond for the bonding mechanism

For more information on this visit

https://brainly.com/question/1641336  

Wastewater filtration

Pros and cons of secondary water filtration?

Answers

Pros:
• Water filtration is cost effective, and it does not require a lot of money to maintain
•It is very easy and straightforward to use

Cons:
•Thorough cleaning and care of the equipment is very vital so that they can carry out the water softening process without any hitch whatsoever


“Sewage"; used water from a community (homes, businesses and industries, stormwater runoff)



Type
Pros
Cons
Pitcher
Low upfront cost; no installation needed.
Does not remove all contaminants; filters must be changed every couple of months and will increase the yearly cost of the filter system; filtration is slow.
Faucet/On the Counter
Relatively inexpensive; can switch between filtered and unfiltered water; easy to install; ideal for drinking and cooking water.
Faucet mounted may not fit on all faucets; decreases flow rate; filters are changed every couple of months.



On the counter may require some installation and can take up space; can sometimes be expensive.
Under-sink
Filter system is out of sight; infrequent filter changes; ideal for drinking and cooking water.
Requires installation; can sometimes be expensive; takes up cabinet space.
Whole House
Whole house kept clean from one system; various processes available; if system uses filters they are changed every couple of years.
Professionally installed; very expensive.
Reverse Osmosis
Removes most unwanted contaminants.
5-step process; filters replaced frequently; very expensive; wastes a lot of water.
Distillation
Removes heavy metals, fluorides and bacteria.
Not energy efficient; takes up a lot of space; very expensive.
Ultraviolet (UV)
Does not use heat or chemicals to remove contaminants.
Any color in water will prevent UV from working; sometimes filtration is necessary prior to UV; has a low effectiveness for removing chemicals.

Hope all these helps

According to the Heisenberg uncertainty principle, it is impossible to know both the __ and __ of an electron simultaneously.
a. mass and charge
b. position and velocity
c. mass and position
d. velocity and charge

Answers

Answer:

C

Explanation:

It's simple because there were so many quantitative analysis of error and they didn't had the kind of observations as we have now

A 170.0 g sample of an unidentified compound contains 29.84 g sodium, 67.49
g chromium, and 72.67 g oxygen. What is the compound's empirical formula?

Answers

The empirical formula : Na₂Cr₂O₇

Further explanation

Given

170 g sample contains :

29.84 g sodium, 67.49  g chromium, and 72.67 g oxygen

Required

The compound's empirical formula

Solution

mol ratio of elements :

Na : 29.84 : 23 g/mol = 1.297

Cr : 67.49 : 51,9961 g/mol = 1.297

O : 72.67 : 16 g/mol = 4.54

Divide by 1.297

Na : Cr : O = 1 : 1 : 3.5 = 2 : 2 : 7

What causes the biggest change mass or speed?

Answers

Answer:

Explanation if an object is in motion and more force is applied to it, the object will begin moving faster. If two objects have the same mass and a greater force is applied to one of the objects, the object which receives the greater force will change speeds more quickly.:

Answer:

i think that it is F

Explanation:

how many moles are in 1.2 x 10^26 molecules of calcium hydroxide

Answers

Answer:

199.26 or with sig figs 2.0 x 10^2

Explanation: you take the # of molecules and divide it by avagadros number which is 6.022141 x 10^23

is cellphone is made from renewable resources * true or false

Answers

Answer:

T

Explanation:

False false false false

nuclear energy is created through the process of splitting apart atoms and releasing large amounts of heat energy that can be converted to electrical energy.this process is known as?

Answers

Nuclear fission is a process by which the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.

How many atoms of silver are in a bracelet that has a mass of 13.94 grams?

Answers

Number of Silver atoms : N = 7.8 x 10²² atoms

Further explanation

Given

mass of bracelet : 13.94 g

Required

Number of atoms

Solution

Assuming the bracelet consists entirely of silver

mol of silver :

= mass : molar mass

= 13.94 g : 107,8682 g/mol

= 0.129

Number of atoms :

N = n x No(No = Avogadro's number)

N = 0.129 x 6.02 x 10²³

N = 7.8 x 10²² atoms

3. How many moles of hydrogen atoms are present in 2.0 moles of ammonia
NH3?
A.3.0 mol
B. 6.0 mol
C. 8.0 mol
D. 2.0 mol

Answers

Answer:

3 I think

Explanation:

this could be because I noticed the 3 subscript by the H which is the letter for hydrogen but I'm not 100% sure

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How many atoms are in 4.5 x 1022 moles of CO2?

Answers

The number of atoms : N = 2.709 x 10⁴⁶

Further explanation

Given

4.5 x 10²² moles of CO₂

Required

The number of atoms

Solution

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Input the value :

N = 4.5 x 10²² x 6.02 x 10²³

N = 2.709 x 10⁴⁶

How does the freezing point of a substance relate to its melting point?

Answers

Answer:

The melting temperature of a solid is generally considered to be the same as the freezing point of the corresponding liquid; because a liquid may freeze in different crystal systems and because impurities lower the freezing point, however, the actual freezing point may not be the same as the melting point.

#carryONlearning


which element group makes computers and calculators

Answers

electronic or Technology

How many moles of CH3 are in 60 grams of CH3 ?

Answers

Answer: There are 3.99 .

Explanation:

Which of the following best describes the movement of particles in a solid?
O A. Particles can vibrate slightly, but are unable to move around.
O B. Particles move past each other freely.
O C. Particles travel at high speeds in all directions.
O D. Particles travel at low speeds in all directions.

Answers

Answer:

A

Explanation:

particles are frozen and hence will vibrate in their fixed positions

PLEASE HELP ME!! CHEMISTRY
139. How many formula units are present in 500.0 g of lead (II) chloride?

Answers

Answer:

(500.0 g PbCl2) / (278.1164 g PbCl2/mol) × (6.022 × 10^23 f.u./mol) =  

1.083 × 10^24 formula units

Explanation:

stars evolve and change over time, what is something else on earth that changes over time? describe the similarities and differences

Answers

Answer:

Trees change over time.

Explanation:

In the summer, trees thrive on the nutrients the sunlight gives them. In the winter, their leaves change colors and they start to perish. Then, with a little bit of sunlight ad water, they can thrive again. Stars also start to perish at some point, but they do not thrive again. They continue perishing until they implode.

At certain times of year , the oceans get warmer. Which part of the water cycle is directly affected by the warming of the ocean water?

Answers

Climate change is likely causing parts of the water cycle to speed up as warming global temperatures increase the rate of evaporation worldwide. More evaporation is causing more precipitation, on average.
May God bless you and your family

Why are we able to see planets at night?

Answers

Answer:   Because planets do not have nuclear fusion, they do not produce their own light. Instead, they shine with light reflected from a star. When we see planets in the night sky, such as Venus, the so-called "Evening Star," we're seeing reflected sunlight.

Explanation:

Why can single bonds rotate freely?

Answers

Carbon atoms in single bonds rotate freely. Rotation can occur because the heaviest electron density in the σ bond exists along an imaginary line between two carbon nuclei. Rotation does not change this electron distribution; the bond strength remains constant throughout rotation.

Substance X is extremely acidic. Substance Y is extremely basic. What would be formed if substance X and Y were mixed together?

Answers

Answer:

salt will form bcz when acids reacts with base then it forms salts . and this reaction is called neutralization reaction

How many moles of Na2SO4 are present in 426.12 grams of Na2SO4? (5 points)

Group of answer choices

2

3

5

6

Answers

Answer: It’s 2.9 moles

Explanation:

Answer:

b) 3

Explanation:

i got it right

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