Question 1 (2 points)
What is the mass in mg of 9.3 x 1016 lead atoms? Give answer with correct
significant figures and units.

Answers

Answer 1

Answer:

the answer would be 9,448.8

Answer 2

The mass of 9.3 × 10¹⁶ lead atoms is equal to 0.032 mg.

What is Avogadro's number?

Avogadro’s number represents the number of entities in one mole of any substance. Generally, these units can be molecules, atoms, ions, electrons, or protons, depending upon the type of chemical reaction or reactant and product.

The value of Avogadro’s constant is approximately equal to 6.022 × 10²³ mol⁻¹.

Given, the number of atoms of the lead =  9.3 × 10¹⁶

The atomic mass of the lead = 207.2 g/mol

So 6.022 × 10²³ atoms of lead have mass = 207.2g

Then 9.3 × 10¹⁶ lead atoms will have mass [tex]=\frac{207.2\times 9.3\times 10^{23}}{ 6.022\times 10^{23}}[/tex]  = 31.998 ×10⁻⁷g

As we know, 1 gram = 1000 mg

The mass of the  9.3 × 10¹⁶ lead atoms =  31.998 ×10⁻⁴ mg = 0.0032 mg

Therefore, the mass of 9.3 × 10¹⁶ lead atoms is  0.032 mg.

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Related Questions

HELP PLS ILL GIVE BRAINLIEST AND 40 POINTS!!!

According to the information in the table, what comparison can Molly make about the densities of sugar and corn starch?

Density is mass divided by volume (D = M/V)

Select one:
A. Corn starch is more dense than sugar.
B. Sugar is more dense than corn starch.
C. Sugar is more dense than baking soda.
D. Both sugar and corn starch are more dense than salt.

Answers

Answer:

A.? I think it is A hope it helps

Which of the following atoms has the largest radius?
Mg
Si
S
Cl

Answers

Answer:

Mg

Hope this helps :D sorry if im wrong :(

When 20g of hydrogen gas will react with 20g of chlorine gas, what is the mass of hydrogen chloride formed?

Answers

Answer:

40g

Explanation:

equation; H2 + Cl2 ---- 2HCl

mole ratio; 1 mole 1 mole 2 moles

before reaction;20g 20g 0g

after reaction; 20g 20g 40g

Every day a 6th grade class puts candy into bags to prepare for Valentine's Day. They put
7 pieces of candy in each bag. If they make 28 bags in 4 days, how many bags would
they make in 10 days?

Answers

70 bags is the answer.
They add “They put 7 pieces of candy in each bag to throw you off”
To find the answer just divide 28 bags by 4 days to get how many bags they make in 1 day. Take that number “7” and multiply it by 10 days. The answer is then 70.


Which two formulas are used to calculate potential and kinetic energy?

Answers

For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2!

Answer:

[tex]\boxed{\bold { \large { \boxed {KE=\frac{1}{2} mv^2 \ , \ PE=mgh}}}}[/tex]

Explanation:

Kinetic energy formula

[tex]\displaystyle KE=\frac{1}{2} mv^2[/tex]

Potential energy formula

[tex]\displaystyle PE=mgh[/tex]

[tex]\displaystyle KE \Rightarrow \sf kinetic \ energy \ (J)[/tex]

[tex]\displaystyle PE \Rightarrow \sf potential \ energy \ (J)[/tex]

[tex]\displaystyle m \Rightarrow \sf mass \ (kg)[/tex]

[tex]\displaystyle v \Rightarrow \sf velocity \ (m/s)[/tex]

[tex]\displaystyle g \Rightarrow \sf acceleration \ of \ gravity\ (m/s^2)[/tex]

[tex]\displaystyle h \Rightarrow \sf height \ (m)[/tex]

As the volume of a gas increases, what happens to the pressure of the gas?

Answers

Boyle found that when the pressure of gas at a constant temperature is increased, the volume of the gas decreases. when the pressure of gas is decreased, the volume increases. this relationship between pressure and volume is called Boyle's law.

A balloon with a volume of 0.5L at 293K is cooled to 20K. What is the balloon's new
volume?

Answers

Answer:

0.03 L

Explanation:

Step 1: Given data

Initial volume of the balloon (V₁): 0.5 LInitial temperature of the balloon (T₁): 293 KFinal volume of the balloon (V₂): ?Final temperature of the balloon (T₂): 20 K

Step 2: Calculate the final volume of the balloon

The balloon is filled with air. If we assume it behaves as an ideal gas, we can calculate the final volume of the balloon using Charles' law.

V₁/T₁ = V₂/T₂

V₂ = V₁ × T₂/T₁

V₂ = 0.5 L × 20 K/293 K = 0.03 L

why is eating fruits and vegetables always included in the lists of prevention for malnutrition and micronutrients deficiencies​

Answers

Fruits and vegetables carry necessary vitamins, minerals, and natural sugars to the body

an atom of which element has the strongest attraction for electons in a chemical bond?cholorine, phosphorus, carbon, sulfur

Answers

The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element. Therefore, chlorine has the strongest attraction for electrons in a chemical bond.

What is atom?

Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.

Atom consists of electron, proton and neutron. The total mass of atom is inside the nucleus. Inside the nucleus proton and neutron is there. So calculate mass of an atom, total mass of all protons is added to the total mass of neutron. Electrons revolve around the nucleus.

Electronegative element have greatest strongest attraction for electrons due to high effective nuclear charge. Among the given molecules, chlorine is the most electronegative element. Chlorine has the strongest attraction for electrons in a chemical bond.

Therefore, chlorine has the strongest attraction for electrons in a chemical bond.

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Suppose the reduction of nitric oxide proceeds by the following mechanism:

step elementary reaction rate constant

(g)
(g)
(g)
(g)
(g)
(g)
(g)
(g)
Suppose also

. That is, the first step is much faster than the second.

Answers

Answer:

vgj I'll all all all

Explanation:

gghjjhhjjjjjjjj nnh

Which has a greater volume, 100mL of alcohol or 100mL of water? Prove your answer.

Answers

Answer water

Explanation:

The representative particle for NaF

Answers

Answer:

Na2S, it is the formula unit

Explanation:

The representative particle of CO2 is the molecule, while for Na2S, it is the formula unit

Write the complete balanced chemical equation _A+_BC3->_AC2 +_ B

Answers

Answer:

Prueba con tus argumentos quienes sufren mas con la violencia?

Answer:

Sure! The complete balanced chemical equation for the reaction you provided is: `2A + BC3 -> AC2 + 3B`.

PLEASE MARK AS BRAINLIEST

When some solid ammonium nitrate was dissolved in water the temperature decreased from 22 oC to 3 oC. What can be deduced from this observation?
The dissolving is endothermic and ∆H is positive. The dissolving is endothermic and ∆H is negative. The dissolving is exothermic and ∆H is positive. The dissolving is exothermic and ∆H is negative.

Which is a correct statement about an endothermic reaction?
A. The bonds in the reactants are stronger than in the products and ∆H is positive.
B. The bonds in the products are stronger than in the reactants and ∆H is positive.
C. The bonds in the reactants are stronger than in the products and ∆H is negative
D. The bonds in the products are stronger than in the reactants and ∆H is negative.

Which is a correct statement about the following() enthalpy level diagram of a reaction? A. The reaction is exothermic and △H is positive.
E. The reaction is exothermic and △H is negative.
F. The reaction is endothermic and △H is positive.
G. The reaction is endothermic and △H is negative.

Which statements are correct for all exothermic reactions?
I. The products are more stable than the reactants.
II. The bonds in the products are stronger than the bonds in the reactants
III. The enthalpy of the products is less than the enthalpy of the reactants
A. I and II only
B. I and III only
C. II and III only
D. I, II and III

Answers

Answer:

1. The dissolving is endothermic and deltaH is positive

2. A. The bonds in the reactants are stronger than in the products and deltaH is positive

3. I can't see the diagram so I don't know the answer (it's a glitch on my part not yours, my school district blocks images automatically on their rented chromebooks)

4.  A. I, and II only

Explanation:

   When we measure the temperature of a solution, and we notice that the temperature of the water is decreasing, then this is an endothermic reaction..

   The dissolved solute (the "invisible" ions) are absorbing the heat, causing the water around it to be colder.. **Heat moves from hot to cold, so the water is losing it's heat and the dissolving (dissolved solute) is gaining heat, meaning that it is Endothermic.

    When a reaction is endothermic, the energy that is required to break bonds and attractive forces is greater than the energy required to form bonds and attractive forces. This means that the bonds in the reactants are stronger than in the products and deltaH is positive. Since we know that the energy in the reactants is greater, there is more heat in the reactants. This is also why the dissolved solute would be gaining heat.. If the energy of the reactants is stronger, when it breaks, it will release a lot of energy that the dissolved solute will be absorbing.

     Think, heat (q, released or absorbed) is measured in Joules, the higher the Joules, the hotter something will be. So, if the heat (q) is negative, that represents the amount of Joules (heat) being released.  If it is positive, that is the amount being absorbed. So, if heat is being absorbed then deltaH is positive.  

    If the diagram shows the products being at a higher energy level than the reactants, then the diagram shows an endothermic reaction.. If we see that the energy from the products is greater, than the energy of the system increased as it absorbed energy from its surroundings.

If the diagrams shows the reactants being at a higher energy level than the products, then the diagram shows an exothermic reaction.. Think of it this way, if we see that the energy from the reactants was greater, than the energy of the system was originally greater than the surroundings, but now (observing the products), it is not, as energy was lost to the surroundings, making this an exothermic reaction.

    For exothermic reactions, the energy that is required to break bonds and attractive forces is less than the energy required to form bonds and attractive forces.. This means that energy in the products are greater, so as these bonds are broken and energy is released, the surroundings gain energy/heat. This means that the energy is favorable (more stable), the more negative our potential energy (energy of the system) is, the more favorable our process is.

please help me out right now​

Answers

Ok what you need help with I’m your G

with what telll  meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Helppppppppppppppppppppppp

Answers

Answer : c - stable atom

Answer:

B. Periodic electrons

1.I make my cup of coffee in the morning by pouring boiling water over ground-up coffee beans held in a special piece of paper and by collecting the brown liquid that comes through. Which techniques of the five described in the background section is/are used in the preparation of the cup of coffee

Answers

Answer:

Filtration

Explanation:

Filtration is a physical separation technique that is used to separate solids from liquids or gases. The process involves the use of a filter which allows just the liquid to pass through.

In this case, the coffee beans is the solid and the boiling water is the liquid. The special piece of paper is the medium (filter) through which the coffee is collected.

The coffee coming through the special piece of paper (filter) is called a filtrate.

Filtration is used in the preparation of the cup of coffee.

How many moles are there in 1.20 x 1025 particles of helium?

Answers

Answer:

You would get 19.969 moles.

Explanation:

You would get 19.969 moles.

Significant figures are a measure of __________. an precise and accurate answer. the true value of a measurement. accuracy. precision.

Answers

Answer:

Significant figures are a measure of precision.

Explanation:

The significant figures of a number are those that have a real meaning and, therefore, provide some information. Therefore, the set of digits that are known with certainty in a measure are called significant figures and are the digits of a number considered non-null.

Any experimental measurement is inaccurate and must be expressed with its significant figures.

In this way, significant figures express the precision of a measuring tool.

7. Circle the number that is larger in each pair.
5.6 x 10-6 or
5.6 x 10-5

Answers

10 because it's a large number

How many atoms are in 4.36 moles of copper ?

Answers

Answer:

Moles of Cr in 4.36×1023 atoms of Cr?

I mass of Cr = 52.00

A's# = 6.02x10^23

I don't know how to approach this. Help?

Update:

Moles of Cr in 4.36×10^23 atoms of Cr?

Update 2:

ALSO......

moles of Cu in 9.7×10^21 atoms of Cu?

moles of C2H6 in 2.75×10^23 molecules of C2H6?

Explanation:

There are 3.567599 atoms in moles of copper

onsider a tank used in certain hydrodynamic experiments. After one experiment the tank contains 200 L of a dye solution with a concentration of 1 g/L. To prepare for the next experiment, the tank is to be rinsed with fresh water flowing in at a rate of 2 L/min, the well-stirred solution flowing out at the same rate. Find the time that will elapse before the concentration of dye in the tank reaches 1% of its original value.

Answers

Answer:

Explanation:

From the given information;

Let Q(t) = mass of dye in the tank as a function of time

The mass in the tank = 200 L × (1g/L) = 200 g

Using the law of mass conservation;

[tex]\dfrac{dQ}{dt} = \text{(Rate of incoming mass)- (rate of outgoing mass)}[/tex]

[tex]\dfrac{dQ}{dt} = (2 L/min ) (0 \ g/L) - (2 L/min ) (\dfrac{Q}{200}g/L)[/tex]

[tex]Q' = \dfrac{-Q}{1000}[/tex]

Q(0) = 200

By finding the solution to the ODE using the method of separation of variables;

[tex]\dfrac{Q'}{Q} = -0.01[/tex]

[tex]Q(t) = Ce^{-0.01t}[/tex]

Using the initial condition;

200 = Q(0) = C

[tex]Q(t) = 200e^{-0.01t}[/tex]

1% of 200g = 2g of dye solution

[tex]2 = 200e^{-0.01t}[/tex]

[tex]e^{-0.01t}=0.01[/tex]

[tex]t =\dfrac{ In(0.01}{-0.01}[/tex]

t = 460.5 hours

Order the following elements in order of increasing atomic size.1.Strontium 2.Tin 3.Iodine 4.Rubidium 5.Xenon

Answers

Answer Xenon.

Explanation:hope this helpssss

45) Rank Ca, Se, Co from the lowest to highest ionization energy.
46) Rank Te, S, and O from the lowest to the highest electronegativity.

Answers

Answer:

45) Ca < Co < Se

46) Te < S < O

Explanation:

These questions are talking about periodic trends. Here are some things to know about periodic trends:

Electronegativity

how well an element attracts an electronincreases left to right and bottom to top on the periodic tablenoble gases are not includedfluorine is most electronegative element, Francium is least

Atomic Radius

the distance between nucleiincreases from right to left and top to bottom on the periodic table the more electronegative an element is, the smaller it's atomic radiusFrancium has the largest atomic radius while fluorine has the smallest

Ionization Energy

the energy required to remove an electrondirectly proportional to electronegativity

Metallic Character

how closely an element's properties match those of a metaldirectly proportional with atomic radius

Hope this helps :)

rite TRUE if the statement is correct and FALSE if it is
1. Coral reefs and mangrove swamps are rich so
2. Mangrove swamps protect coastline areas an
3. Cutting down of trees lessen global warming
4. Tropical rainforests serve as shelter and habi
5. Coral reefs come from the waste of marine a
6. Mangrove swamps are found on the deep p
7. Overfishing causes destruction to food chai
8. Coral reefs cause formation of tidal waves.
9. Rainforests ecosystems supply a variety of
10.Coral reefs serve as hatchery for birds.
plete the graphic organize below. Write why y
Ecosystomo​

Answers

Answer:

uR making us work hard for this and yet all u give is 5 points

How many atoms is 45 moles of silicon (Si)?

Answers

I think it’s 270.9. Hope this help

Determine the number of significant figures in 53800​

Answers

3 because it is rounded to the nearest 100

How many particles are in 67 grams of Oxygen?

Answers

There are so many particles in 67 grams of oxygen

42 mole Al= how many atoms?

Answers

Answer:

2.5 × 10²³ atoms Al

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

42 mol Al

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Set up:                               [tex]\displaystyle 42 \ mol \ Al(\frac{6.022 \cdot 10^{23} \ atoms \ Al}{1 \ mol \ Al})[/tex]Multiply/Divide:                 [tex]\displaystyle 2.52924 \cdot 10^{25} \ atoms \ Al[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

2.52924 × 10²³ atoms Al ≈ 2.5 × 10²³ atoms Al

Please help me fast What is the Molarity of 100g of Vit. C (C6HBO6) with 2.5L of water?

Answers

.22M because u convert 100g to mols which is around .56mol then divide by 2.5
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