where is the atomic mass on the periodic table

Answers

Answer 1

Explanation:

At the upper left is the atomic number, or number of protons. In the middle is the letter symbol for the element (e.g., H). Below is the relative atomic mass, as calculated for the isotopes found naturally on Earth. At the very bottom is the name of the element (e.g., hydrogen).


Related Questions

Write method of manufacturing of oxygen gas from liquid air

Answers

Answer:

cryogenic distillation process

Explanation:

Cryogenic distinction between carbohydrates and harmon process.

Calculate the molar mass for CO

Answers

Answer:28.01 grams

Explanation:

Given the equation
N2(g) +3H2 (g)--> 2NH3 (g)
1 mole of N2 gas is needed to completely react with 3 moles of H2 gas.
How many molecules of H2 gas are needed?

Answers

Answer:

numbers of molecules = 3×6.023×10-23

If a car is traveling 100 km/h and comes to a stop in 3 minutes,what is acceleration of a passenger who is using vehicle restraint?

Answers

We are given

Final velocity of car is, v= 0 Initial velocity of car is, u= 100 km/hr Time taken, t is = 3 minutes or 180 sec

Here

[tex]\qquad[/tex][tex] \pink{\bf \longrightarrow Initial\: velocity = 100 \:km/hr}[/tex]

[tex]\qquad[/tex][tex] \sf \longrightarrow Initial\: velocity = \dfrac{ 100 \times 1000}{3600} \:m/s[/tex]

[tex]\qquad[/tex][tex]\pink{ \bf \longrightarrow Initial\: velocity = 27.78\: m/s} [/tex]

Now –

[tex]\qquad[/tex]____________________________

[tex]\qquad[/tex][tex] \purple{\bf \longrightarrow Acceleration = \dfrac{Final\: Velocity -Initial \:Velocity }{Time}}[/tex]

[tex]\qquad[/tex][tex] \purple{\bf \longrightarrow Acceleration = \dfrac{v -u}{t}}[/tex]

[tex]\qquad[/tex][tex] \sf \longrightarrow Acceleration = \dfrac{(0- 27.78)}{1800}[/tex]

[tex]\qquad[/tex][tex] \sf \longrightarrow Acceleration =\cancel{ \dfrac{- 27.78}{1800}}[/tex]

[tex]\qquad[/tex][tex] \purple{\bf \longrightarrow Acceleration = -0.015 \: m/s^2} [/tex]

[tex]\qquad[/tex]_______________________________

Which of the following can be a
wave medium?
A. solids, liquids, gases, and plasma
B. only solids
C. empty space

Answers

The answer would be A


I need help ASAP this is my final

Answers

Answer:

A

Explanation:

is the best answer...........

how many moles are in 8.32 × × times 10^24 molecules of co2?

Answers

Answer:

13.8 moles

Explanation:

You know that in a mole you have 6.022x10²³ something in this case of molecules. By knowing that by each mole you have 6.022x10²³ molecules, then you can establish the factor of conversion:

8.32x10²⁴molec of CO2 x 1 mol/6.022x10²³ molec of CO2

You divide 8.32x10²⁴/6.022x10²³ and you get 13.81 moles.

Hurry. NO Spam! Write the neutralization reaction that occurs between HF and LiOH.

Answers

Answer:

HF + LiOH = LiF + H2O.

Explanation:

Hydofluoric acid is a weak acid the solution would be slightly basic due to the following equilibrium (condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs.)

Hope that helps. x


12. Draw the dot diagram for a molecule of P2
[show your work and draw a box around your answer]

Answers

Explanation:

download the app topper

[tex]\rule{2000pt}{1000000pt}[/tex]

mamama

Which term describes the small, somewhat circular pattern of wind?

A Easterlies

B Trade Winds

C polar winds

D convection cells

Answers

Answer:

its D, convection cells

What are the most of the elements in the periodic table

Answers

Answer:

Most of the elements in the periodic table are metals.

Hope that helps. x

Answer:

Here is your answer,mate!

Explanation:

Metals are the most of the elements in the periodic table.

PLEASE HELP ASAP I'M SO STRESSED

Answers

Answer:

160.3g

Explanation:

We know the equation:

No of moles = mass ÷ Mass of element

We need to find the mass, so make mass the subject of the formula.

Mass = No. of moles × mass of element

Mass = 5 × 32.06

Mass = 160.3g

What is a Chemical Properties and Physical Properties? Please tell me the deffinition of them both.

Answers

Answer:

All properties of matter are either physical or chemical properties and physical properties are either intensive or extensive. ... Physical properties can be measured without changing a substance's chemical identity. Chemical properties can be measured only by changing a substance's chemical identity.

Explanation:

A quantity of gas has a volume of 250L at 40°C. If the gas is heated to 120°C, what will the new volume be? Which law describes this change?

Answers

Answer:

706 L

Explanation:

P1V1 = P2 V2 3 atm 250.0 mL = 1 atm X

T1 T2 290 K 273 K

706 mL = X

Which of the following is true of grinding during
digestion?
A. The process of grinding is a physical change
that takes place in the mouth during digestion.
B. The process of grinding is a chemical change
that takes place in the mouth during digestion.
C. The process of grinding is a physical change
that takes place in the small intestine during
digestion
D. The process of grinding is a chemical change
that takes place in the small intestine during
digestion

Answers

The process of grinding is a physical change that takes place in the mouth during digestion.

GRINDING:

Grinding is one of the processes that occur during the digestion of food molecules into simpler substances.

Grinding of food molecules occurs in the mouth with the aid of the teeth, which is used to chew.

However, the process of grinding is a physical change because it does not result into the formation of new substances or change the chemical constituents of the food.

Learn more about physical change at: https://brainly.com/question/1984022?referrer=searchResults

If a sample of gas at constant temperature has its pressure doubled, what will happen to its volume?

Answers

Answer:

it'll halve

Explanation:

the gas is compressed with twice the pressure. The volume will be halved.

im certain

A solution containing 0.60 moles of sodium hydroxide is added to excess magnesium sulfate in solution. A white solid, magnesium hydroxide, is formed.

a) Write a balanced equation including the states of reactants and products.
b) write the name of the other product formed? ​

Answers

Explanation:

and then name of the other product will be sodium sulphate

Given that the molar mass of NaCl is 58. 44 g/mol, what is the molarity of a solution that contains 87. 75 g of NaCl in 500. ML of solution? Use Molarity equals StartFraction moles of solute over liters of solution EndFraction. 0. 333 M 0. 751 M 1. 50 M 3. 00 M.

Answers

Answer:

D

Explanation:

Given that the molar mass of NaCl is 58.44 g/mol, we want to determine the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution.

Recall that molarity is given by:

[tex]\displaystyle \text{M} = \frac{\text{ mols solute}}{\text{ liters soln.}}[/tex]

Therefore, we can convert the amount of NaCl in the solution to moles of NaCl and the volume from milliliters to liters:

[tex]\displaystyle \begin{aligned} \text{M} & = \frac{(87.75 \text{ g NaCl})}{(500. \text{ mL soln.})} \cdot \frac{1 \text{ mol NaCl}}{58.44 \text{ g NaCl}} \cdot \frac{1000 \text{ mL soln.}}{1 \text{ L soln.}} \\ \\ & = 3.00\text{ } \frac{\text{mol NaCl}}{\text{ L soln.}} \\ \\ & = 3.00 \text{ M} \end{aligned}[/tex]

Hence, our answer is D.

Calculate the density of sulfur dioxide gas (SO2) at 147°C and 29.9 kPa.

Answers

The density of the gas is obtained as  0.55 g/L.

We can find the density of the gas using the relation;

PM = dRT

P = pressure of the gas

M = molar mass of the gas

d = density of the gas

R = gas constant

T = temperature

Now;

P = 29.9 kPa

R = 8.314 L·kPa mol·K.

T =  147°C + 273 = 420 K

d = ?

M = 64 g/mol

Substituting values;

d = PM/RT

d =  29.9 kPa ×  64 g/mol/ 8.314 L·kPa mol-1K-1 420 K

d = 1913.6/3491.88

d = 0.55 g/L

Learn more about density: https://brainly.com/question/952755

Which elements are the most reactive and why?

Answers

Answer:

Fluorine is identified as the most reactive nonmetal and the most electro-negative element in the periodic table, making it the strongest oxidizing agent. Caesium is the most reactive metal in the periodic table, so much that working with this metal often ends in explosions!

Hydrogen is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements.

Hope that helps.

Alkali metals (situated far away from transitional metals and noble gases) are the most reactive elemental group. Cesium is second from the bottom of this group, with 6 electron shells, so it fits all the characteristics of a reactive atom, therefore making it the most reactive element.

how many grams are in 4.5 x 10^22 molecules of water

Answers

Answer:

1.35 g

Explanation:

water is h2o, so the molar mass is 1.01x2+16.00=18.02. divide 4.5 x 10^22 by 6.022 x 10^23 to get 7.5 x 10^-2 (2 sig figs). 18.02 x 7.5 x 10^-2 is 1.35 g

2. What do acidic solutions have high concentrations of? ​

Answers

hydrogen ions
mark me brainlist

Answer:

Explanation:

An acidic solution has a high concentration of hydrogen ions (H +start superscript, plus, end superscript), greater than that of pure wate

Mendeleev's arrangement of the periodic table was in order of increasing ____.
A. atomic number
B. atomic mass
C. neutron number
D. valence electron number

Answers

Answer:

B. atomic mass

Explanation:

He arranged the elements into rows in order of increasing mass so that elements with similar properties were in the same column.

why do the noble gases have relatively low electron affinities?

Answers

Answer:

Because noble gases have a full octet, their ionization energies are actually quite high. Electron affinity is the amount of energy released when an electron is added to a neutral atom. Because noble gases have stable electron configurations, they have very low electron affinities.

Explanation:

Answer:

Noble gases have a stable outer shell

Explanation:

Normal human sex cells have 23 chromosomes. Use the art to determine the number of chromosomes a sex cell may have if the nondisjuction occured during Meiosis I. Include all possible chromosome totals.

Answers

Answer:

46.....................

Please Help giving high points. Perform the following mathematical operation, and eport the answer to the correct number of significant figures. 4568/1.3 = [?]​

Answers

Answer:

1.3 is the value with the lowest sig figs in your question. So we have 2 sig figs.

4568/1.3 = 3513.84615

Now let's change the answer in sig figs.

We know that trailing zeros don't actually count as part of sig figs.

So we can round the answer to 3500, having the 2 sig figs (3 and 5) while the trailing zeros don't count.

Final answer = 3500

explain why almunium is often used for long distance over head electric cables (high voltage)​

Answers

Answer:

because it does not cost much and can be found easily.  due to their low resistance and excellent conductivity.

Explanation:

how many fluid ounces can i take on a plane united

Answers

3.4 ounces

Liquid or gel food items larger than 3.4 oz are not allowed in carry-on bags and should be placed in your checked bags if possible. TSA officers may instruct travelers to separate items from carry-on bags such as foods, powders, and any materials that can clutter bags and obstruct clear images on the X-ray machine.

A) Oxygen
B) water and oxygen
C) water and carbon dioxide
D) water and carbon monoxide

Answers

Answer:

A

Explanation:

this is because combustion is the chemical reaction between surfaces including OXYGEN to generate heat and light in the form of flame

Give an example for the neutralisation between a strong acid and a weak base, also mention the nature of its salt.​

need help !! ~~~~

Answers

Answer:

Neutralization occurs when a strong acid and a strong base come together in a chemical reaction to form water and salt.

Explanation:

not sure huhuhu

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