What can the period number of an element tell us about that element?

Answer:

radiation and conduction

Explanation:

During a warm summer day, a car became extremely hot. When a student went to open the car door, he burned his fingers. What two forms of energy were responsible for the student burning his fingers?

Solution:

Heat is the transfer of energy from a warmer object to a cooler object. For heat transfer to occur, there have to be a difference in temperature between two objects.  

Heat can be transferred in three ways: by conduction, by convection, and by radiation.

Conduction is the transfer of thermal energy between bodies through direct contact. Convection is the transfer of thermal energy through the movement of heat in a liquid or gas. Radiation is the transfer of thermal energy through thermal emission by electromagnetic waves.

During a warm summer day, The sun makes the car to become hot through energy transfer from the sun to the car. When the student touch the car, there is heat transfer as a result of conduction.

Answer:

Organelles; role.

Explanation:

A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life. A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells. Generally, cells have the ability to independently replicate themselves. In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles with their respective functions in all living organisms such as trees, birds, and bacteria include;

1. Nucleus : it controls all the activities taking place in the cell and the synthesis of proteins.

2. Mitochondria : it provides all the energy required in the cell by transforming energy forms.

3. Lysosomes : they are responsible for absorbing materials and breaking the materials taken in by the cells.

4. Chromosomes : they give sets of instructions for the synthesis of products.

5. Ribosomes : they are involved in the build up of proteins.

6. Endoplasmic Reticulum : this is where the ribosomes perform their tasks.

7. Cytoskeleton : they help to maintain and support the shape of the cells.

8. Vesicles : they ensure proteins are properly transported to the right and exact location.

9. Golgi apparatus : it prepares the protein for export by chemically tagging them.

10. Cell membrane : is the wall of the cell and typically controls what leaves and enters the cell.

Hence, cells are made of many parts, or organelles, that help the cell do its job. Each cell organelle has a specific function, or role.

Answer:

98.4 kPa

Explanation:

Step 1: Given and required data

Step 2: Calculate the total pressure of the gaseous mixture

The total pressure of the gaseous mixture (P) os equal to the sum of the partial pressures of the gases that form it.

P = pH₂O + pN₂ + pHe

P = 19.9 kPa + 53.0 kPa + 25.5 kPa = 98.4 kPa

The total pressure of the wet gas mixture is 98.4 KPa

This law states that at constant temperature, the total pressure of a mixture of gases is equal to the sum of the partial pressure exerted by each gas. Mathematically, it is expressed as

Total pressure = partial pressure of A + partial pressure of B

P = pH₂O + pN₂ + pHe

P = 19.9 + 53 + 25.5

P = 98.4 KPa

Learn more about partial pressure:

https://brainly.com/question/15577259

Answer:i think its 1974

Explanation:

Answer:

P³⁻ + Cl⁻ --> PCl₃

Explanation:

PCl₃: phosphorus trichloride. prefix in front of chloride is "tri"–meaning three.

Answer:

phosphorus + chlorine = phosphorus trichloride

(He asked for word equation)

Answer: about 1,705,536 hrs

24 hrs = 1 day

189 hrs = 1 week

756 = 1 month

9072 = 1 yr

1,705,536 = 188 yrs

Explanation:

Trust Milky. Milky smart

Answer:

B. the American bald eagle

Answer:

layer 1 is the same age as layer C

layer 3 is the same age as layer D

The term ionic is used when compounds are formed from a metal element and non metal element because of the transfer of electrons from the metallic to the non metallic elements to become ions

Ionic combination is the process of chemical combination that mostly happens between metals and nonmetals in which metals lose electrons and non metals gain electrons.

Metals are reducing agents because they are highly electropositive. Hence they become ionized by losing electrons to electronegative elements like the non metals

Non metals are oxidizing agents because they become ionized by gaining electrons from electropositive elements, mostly metals.

Therefore, the term ionic is used when compounds are formed from a metal element and non metal element because of the transfer of electrons from the metallic to the non metallic elements to become ions

Learn more here: https://brainly.com/question/19467019

Answer:

Mole

Explanation:

In solids, amount of substance is given by;

n = mass/molar mass

n will have a unit of mole

However, in liquids, amount of substance is;

n = concentration × volume

Again, n will be in mole

Thus, the SI unit that represents the amount of substance is mole

Answer:

Genotypic ratio = 1 Bb: 1 bb

Phenotypic ratio = 1 black rabbit : 1 brown rabbit

Explanation:

This question involves a gene coding for hair color in rabbits. The allele for Black hair (B) is dominant to the allele for brown hair (b).

According to this question, a black rabbit whose mother is brown haired (bb) is crossed with a brown hair rabbit. This means that the black rabbit will have a genotype 'Bb' while the brown rabbit will have a genotype 'bb'. Each parent will produce the following gametes:

Bb - B and b

bb - b and b

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

Bb, Bb, bb and bb

This means that the;

Genotypic ratio = 1 Bb: 1 bb

Phenotypic ratio = 1 black rabbit : 1 brown rabbit

Answer:

2 mol CH 4

Explanation:

43.8 x L

----------------                      = 2 mol CH 4

22.4 x L x mol - 1

Answer:

2 significant figures i.e. 2 and 7.

Explanation:

We need to find the number of significant figures in the given number i.e. [tex]2.7\cdot10^{-3}[/tex].

It has 2 significant figures i.e. 2 and 7.

It means the power of 10 doesn't count in the significant figures.

Hence, there are 2 significant figures.

Answer:

See explanation

Explanation:

Fossil fuels are formed from the remains of plants and animals that have been subjected to intense pressure during the carboniferous era. These plants and animal remains undergo the process of fossilization to yield the fossil fuels we have today such as crude oil.

Living organisms are composed of elements which include nitrogen and sulphur. Since these fuels originated from dead organisms, they also contain these elements found in living organisms.

Hence, fossil fuels such as; coal, crude oil, and natural gas contain 0.05%-0.5% sulfur and 0.5%-2.1% nitrogen.

Answer: 2Ag + 2H2O + HgCl2 → 2AgCl + H2 + Hg(OH)2

Explanation: hope this helps, if so give me brainliest thanks!

Answer:

Calcium chloride react with silver nitrate to produce calcium nitrate and silver(I) chloride.

Answer:

Silver Chloride and Calcium Nitrate

Explanation:

calcium chloride + silver nitrate = Silver Chloride + Calcium Nitrate

            ^                         ^                        ^                             ^

              The Reactants                               The Products          

2AgNO3 + CaCl2 -> 2AgCl(ppt) + Ca(NO3)2

Answer:

An object with a high mass close to the Earth could be sent out into a collision course with the asteroid, knocking it off course. When the asteroid is still far from the Earth, a means of deflecting the asteroid is to directly alter its momentum by colliding a spacecraft with the asteroid.

Hope it helps!!

Answer:

1. deflect it 2. grab it with a claw 3. blast it to smithereens

Explanation:

Answer:

No, Micah is not correct. Since there are equal numbers of people in each group who drive and who do not drive, the relative frequency for each is 50%. Because the relative frequencies are the same, there is no association   between the variables.

Explanation:

Answer:1.2 picoseconds

Explanation:

Answer:

B

Explanation:

The triple point is the temperature and pressure in which the three states or phases of a matter coexist with one another.

For example, the triple point of pure water is 0.01°C and 4.5mmHg

Answer:

Iodine

Explanation:

Helium, Radon, and Krypton are all in group 18 but Iodine is not

(it's in group 17)

:)

The chemical reaction in which energy is released is referred to as an Exothermic reaction.

This is the type of reaction in which the overall standard enthalpy change is negative.

This is however as a result of the energy being released when a chemical reaction takes place under certain conditions.

Read more about Exothermic reaction here https://brainly.com/question/579952

#SPJ2

Explanation:

32.0g×1 mole/79.9g = 0.401 mole Br

ratio 1:2

MgBr2

9g × 1mole/24.31= 0.20 mole Mg

Explanation:

0 is the odd one...............

and rest are metals and they lose electron and 0 gain electron and is non metal

Answer:

the answer I think is 76.5L

Answer:

c. Gas particles don't interact

Explanation:

Ideal gas particles do not interact with each other.

The gas molecules do not interact with each other except for colliding with each other. Gases expand to completely fill a container; they would not if they were attracted to each other. That being said, they obviously still do, as a result of Dalton's Law.