How many atoms are contained in 5.77 grams of aluminum? Express your answer in exponential notation (Ex: 6.02*1023 would be entered as 6.02e23). Round the digits to the hundredths place. No units required.

Answers

Answer 1

Answer:

5.09

Explanation:


Related Questions

5. Determine if each statement is true or false about forming a hypothesis:
a. It must be long.
b. It is an educated guess.
c. It is in if…then format.
d. It must be testable.
e. It must start with I think.

Answers

a. false
b. true
c. true
d. true
e. false

Help me on both of those questions please

Answers

Occurs evaporation and then the egg turns solid into a liquid

Answer:

Hey mate.....

This is your answer....

Explanation:

1. Evaporation

2. Liquid to solid

hope it helps you,

mark me as the brainliest.....

FOLLOW ME!

Which element is in the same period as Potassium (K) and in the same
group as Flourine (F)?
O A. Bromine (Br)
O B. Oxygen (O)
O C. Selenium (Se)
O D. Argon (Ar)

Answers

Answer:

A. Bromine (Br)

Explanation:

Correct answer is A. Bromine (Br)

What is the geometry for MgF2?

Answers

Answer:

espero poderte ayudar

Explanation:

Answer:

2FMg

Explanation:

MgF*2=2FMg

Brainliest for an answer!

2 As (s) + 6 NaOH (aq) → 2 Na3AsO3 (s) + 3 H2 (g)


If 34.0g of As react with excess NaOH at STP, what volume of H2 will be produced in liters?


If you can answer this question quickly, I will mark you brainliest, I'm stumped to be honest.

Answers

The volume of H₂ : = 15.2208 L

Further explanation

Given

Reaction

2 As (s) + 6 NaOH (aq) → 2 Na₃AsO₃ (s) + 3 H₂ (g)

34.0g of As

Required

The volume of H₂ at STP

Solution

mol As (Ar = 75 g/mol) :

= mass : Ar

= 34 g : 75 g/mol

= 0.453 mol

From the equation, mol ratio As : H₂ = 2 : 3, so mol H₂ :

=3/2 x mol As

=3/2 x 0.453

= 0.6795

At STP, 1 mol = 22.4 L, so :

= 0.6795 x 22.4 L

= 15.2208 L

How many moles are present in 44.8 L of nitrogen gas (Na)?

Answers

Answer:

two moles

There are two moles.

Explanation:

What is the percent yield of this reaction if 22.o g of Mgl2 is produced by the reaction of 25.0 g of Mg with 25.0 g of l2?

Answers

% yield = 80.719

Further explanation

Given

22.0 g of Mgl₂

25.0 g of Mg

25.0 g of l₂

Required

The percent yield

Solution

Reaction

Mg + I₂⇒ MgI₂

mol Mg = 25 g : 24.305 g/mol = 1.029

mol I₂ = 25 g : 253.809 g/mol = 0.098

Limiting reactant = I₂

Excess reactant = Mg

mol MgI₂ based on I₂, so mol MgI₂ = 0.098

Mass MgI₂ (theoretical):

= mol x MW

= 0.098 x 278.114

= 27.255 g

% yield = (actual/theoretical) x 100%

% yield = (22 / 27.255) x 100%

% yield = 80.719

Hi! I produce proteins inside the cell. What am I?​

Answers

Answer:

ribosome is the cell

Explanation:

hsduuejxkwnckwnirj

Ribosomes? I’m not sure but I think that’s it

Describe the changes to the coastline pictured above. Look particularly at North and South Monomy Island.

Answers

             Where is the picture?                                                                         

What will the formula of a diatomic element look like?

Answers

Answer:

or example, most samples of the elements hydrogen, oxygen, and nitrogen are composed of molecules that contain two atoms each (called diatomic molecules) and thus have the molecular formulas H2, O2, and N2, respectively. ... A molecule of sulfur is composed of eight sulfur atoms and is therefore written as S8.

What is the molar mass of nitrogen gas, N2(g)? How many moles of nitrogen
molecules are in 56 grams? Explain.

Answers

Answer:

28g/mol

2 moles of nitrogen are present

Explanation:

The molar mass is defined as the mass of a chemical when 1 mole of this substance is present and is used to convert mass of the substance to moles or vice versa. Is widely used in stoichiometry problems.

1 atom of nitrogen has a molar mass of 14g/mol. N₂(g) -The molecule that contains 2 atoms of nitrogen- has a molar mass of 28g. That is 28g/mol.

56g of N₂ are:

56g * (1mol / 28g) =

2 moles of nitrogen are present

un ejemplo de cambio físico ocurre cuando: a) horneamos pan dulce. b) endulzamos el agua de limón. c) freímos los huevos. d) tostados los granos de café.​

Answers

Answer:

...

Explanation:

A certain amount of gas at 25°C and at a pressure of 0.800 atm is contained in a glass vessel. Suppose that the vessel can withstand a pressure of 2.00 atm. What is the maximum temperature in Kelvin that the gas can have without bursting the vessel?
a. 745 K
b. 62.5 K
c. 298 K
d. 760 K ​

Answers

The maximum temperature : a. 745 K

Further explanation

Given

Gas at 25°C(298 K) and at a pressure of 0.800 atm

Final pressure = 2 atm

Required

Final temperature

Solution

Gay Lussac's Law  

When the volume is not changed, the gas pressure in the vessel is proportional to its absolute temperature  

[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

Input the value :

T₂=(P₂T₁)/P₁

T₂=(2 atm x 298 K)/0.8 atm

T₂ = 745 K = 472 °C

Through which medium would it be easiest to hear someone speaking to you?
Select one
-sea water
-concrete wall
-vacuum
-Air

Answers

air i think? i’m not sure

Answer:airr

Explanation:

Identify processes that change matter to a liquid state

Answers

Condensation When steam is cooled, it releases thermal energy and turns into its liquid state. This process is called condensation.

6 Li + Zn3(PO4)2 ------- > 2 Li3PO4 + 3 Zn




If 48.6 g of zinc is made, how many moles of lithium phosphate are also made? _______ moles

Answers

Moles of Lithium phosphate : 0.495

Further explanation

Given

6 Li + Zn₃(PO₄)₂ ------- > 2 Li₃PO₄ + 3 Zn

Required

Moles of Lithium phosphate

Solution

moles of Zinc(Ar=65,38 g/mol) :

= mass : Ar

= 48.6 : 65.38

= 0.743

From equation, mol ratio of Zn :  Li₃PO₄ = 3 : 2, so mol  Li₃PO₄ :

= 2/3 x mol Zn

= 2/3 x 0.743

= 0.495

Which element would most likely bond with lithium & why?

Answers

Answer:

Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.

Answer:

Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.

What is the name of Na3N?
HELP PLEASEEEE !!!!

Answers

Answer:

the answer I's the first one

What is the smallest representative particle of an element?

Answers

Answer:

atom

Explanation:

The smallest representative particle of an element is an atom.

What are atoms

Atoms are the fundamental building blocks of matter and the smallest unit of an element that retains the chemical properties of that element. Each atom consists of a nucleus at the center, composed of positively charged protons and neutral neutrons, surrounded by a cloud of negatively charged electrons.

Atoms combine to form molecules or ions through chemical reactions, but they themselves represent the basic structure and identity of an element. Each element has a unique number of protons in its nucleus, known as its atomic number, which determines its position on the periodic table and its distinct chemical properties.

Learn more about element at

https://brainly.com/question/20096027

#SPJ6

The ____________________ two objects are from each other, the _____________ the force of gravity between them. fill in spaces

Answers

Answer:

Farther, lesser

Explanation:

The farther the two objects are from each other, the lesser the force of gravity between them.

The force of gravitational attraction between two bodies is inversely proportional to the distance between them.

This premised on the Newton's law of universal gravitation which states that "the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distances between them".

So, the farther the distance, the lesser the gravitational attraction and vice versa.

How is water used in human living? Give at least five examples.

Answers

Your body uses water in all its cells, organs, and tissues to help regulate temperature and maintain other bodily functions. Because your body loses water through breathing, sweating, and digestion, it's important to rehydrate by drinking fluids and eating foods that contain water.

what will happen an unboiled egg is placed in the beaker of fresh water and salt water

Answers

Answer:

Explanation:

1

Humans have developed ways to increase the of their
environment. true or false

Answers

Answer:

True......................had to do this because we need atleast 20 letters

Determine the final temperature of sample with a specific heat of 1.1 J/g°C and a mass of 385 g if it starts out at a temperature of 19.5°C and 885 J of energy are added to it.

Answers

Answer:

T2 =21.52°C

Explanation:

Given data:

Specific heat capacity of sample = 1.1 J/g.°C

Mass of sample = 385 g

Initial temperature = 19.5°C

Heat absorbed = 885 J

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = Final temperature - initial temperature

885J = 385 g× 1.1 J/g.°C×(T2 - 19.5°C )

885 J = 423.5 J/°C× (T2 - 19.5°C )

885 J / 423.5 J/°C = (T2 - 19.5°C )

2.02°C = (T2 - 19.5°C )

T2 = 2.02°C + 19.5°C

T2 =21.52°C

what is rusting of iron?​

Answers

Answer:

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Unlike rust, which can flake off the surface of iron and steel objects, the layer of aluminium oxide does not flake off.

Explanation:

Rusting = oxidation reaction
Iron = reacts with oxygen and water to form hydrated iron oxide, we then start to see rust.
This prevents the metal from coming in any contact with air. Hope this helps :)

What is the molecular formula for a compound that is 40.0% C, 6.6% H, and 53.4% O and the molar mass is 120.0g/mol?

Answers

Answer:

molecular formula of the compound is C₄H₈O₄

Explanation:

First the empirical formula of the compound is determined:

Divide the percentage masses by the molar mass of each element to determine the mole ratio;

Carbon, C: 40/12 = 3.33

Hydrogen, H: 6.6/1 = 6.6

Oxygen, O: 53.4 / 16 = 3.3

dividing through with the smallest ratio to obtain the simplest whole number mole ratios

C = 3.3/3.3 = 1

H = 6.6/3.3 = 2

O = 3.3/3.3 = 1

Therefore, the empirical formula is CHO

molecular formula/mass = n (empirical formula/mass)

120 g/mol = n( 12 + 1 * 2 + 16)

30n = 120

n = 4 therefore, the molecular formula = 4(CH₂O)

molecular formula of the compound is C₄H₈O₄

Please I need help I can’t fail

Answers

I believe it’s D, it makes sense.

Which statements describe the fossil record? Check all that apply.

There is very little fossil evidence for the first 4 billion years of Earth.
There is very little fossil evidence for the last 600 million years of Earth.
Most of the fossil evidence is from the first 4 billion years of Earth.
Most of the fossil evidence is from the last 600 million years of Earth.
The fossil record is complete.
The fossil record is not complete.

Answers

Fossils are the preserved remains of organisms that have died and decayed. They are very useful in understanding the evolutionary history of organisms and to study ancient life forms.
Geologists use fossils to date sedimentary records by placing them in the order of their specific appearance.

Answer:

A D F

Explanation:

look at attachment if you don't believe me

A skateboard with a mass of 1.4 kg is accelerated with a force of 11.9 N.
Problem
If resisting forces are ignored, what is the acceleration of the skateboard?

A O 13.3 m/s2
BO 8.5 m/s2
CO 0.12 m/s2
D 16.66 m/s2
Submit Answer
Copyright © Education Galaxy, 2021. All Rights Reserved.

Answers

It would be C because you would do m divided by s squared and you would get 0.11 but you would round it to 0.12


How many significant figures are in the value 0.00250 m?

Answers

Answer:

3 significant figures

Explanation:

Significant figures:

1) The given measurement have four significant figures 1234.

2)  All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

3) Zero between the non zero digits are consider significant like 104 consist of three significant figures.

4)  Leading zeros are not consider as a significant figures. e.g. 0.07 in this number only one significant figure present which is 7.  

5) The zeros at the right side e.g 2600 are also significant. There are four significant figures are present.

In given measurement (0.00250 m) number of significant figures are 3.

2,5 and 0

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