convert 175 lbs to kg

Given :

Mass of oxygen containing carbon monoxide (CO) is 2.666 gram .

To Find :

How many grams of carbon (C) would be present in carbon monoxide (CO) that contains 2.666 grams of oxygen (O) .

Solution :

By law of constant composition , a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

So , volume of solution does not matter .

Moles of oxygen , [tex]n=\dfrac{2.666}{16}=0.167\ mole[/tex] .

Now , molecule of CO contains 1 mole of C .

So , moles of C is also 0.167 mole .

Mass of carbon , [tex]m=12\times 0.167=2\ g[/tex] .

Therefore , mass of carbon is 2 grams .

Hence , this is the required solution .

Answer:

A.

Explanation:

The chemical equation in which the number of atoms in the reactants is the same as that of products would be Zn + 2HCl → H2 + ZnCl2. The correct option would be A.

Let us consider all the component atoms in the equation: Zn + 2HCl → H2 + ZnCl2

In Li2CO3 → LiO + CO2:

In CO2 + H2O → CH2OH + O2

In CH4 + O2 → CO2 + 2H2O

Hence, the only equation in which the number of atoms in the reactants is the same as that of products is Zn + 2HCl → H2 + ZnCl2

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Answer:

this does not look like chemistry but I believe your answer is 50.9439

Explanation:

hope it helps

Answer:

The mass of KF in the mixture is 2.77 gms.

Explanation:

Given;

Total weight of mixture (LiF+KF)=5.32gms

Let, mass of KF in the mixture = x gms

⟹ mass of LiF in mixture =(5.32-x)gms.

We know that :

Atomic weight of F=19gms.

Atomic weight of Li =7gms.

Atomic weight of K = 39 gms.

moles=mass/(molecular weight)

Thus, moles of KF=x/58

and moles of LiF = (5.97-x)/26LiF=(5.97−x)/26

Thus,

moles of F in KF=moles of KF=x/58 ---(1)

moles of F in LiF =moles of LiF= (5.32-x)/26---(2)

From (1) & (2),

Total moles of Fluorine

=(x/58)+((5.32-x)/26)

Hence,

total weight of Fluorine in sample = moles*Atomic weight

=((x/58)+((5.32-x)/26))*19gms.

=3.12 gms.---(given)

Now, solving the equation for x,

26x +(5.32*58)-58x

=3.12*58*26/19

22x=308.56-247.62

x=60.94/22

=2.77 gms. (Answer)

Thus, the mass of KF in the mixture is 2.77 gms.

Answer:

6

Explanation:

2+2=6

Answer:

3.10 × 4.520 = 14.0

Explanation:

Sig Figs

3

Decimals

1

Scientific Notation

1.40 × 10'

Answer:

true, they both have different types of DNA.

Answer:

Um yes... they have different DNA's.. ;-;

Explanation:

Answer:

1.a member of carbon family  with 14 eletrons is silicon

2.halide which is liquid at room temperature is bromine

3.transition metal with 79 electrons/protons and neutron 80 for me Is Gold

Answer:

= 9.872002 × 10^6

Explanation:

Move the decimal point in your number until there is only one non-zero digit to the left of the decimal point. The resulting decimal number is a.

Count how many places you moved the decimal point. This number is b.

If you moved the decimal to the left b is positive.

If you moved the decimal to the right b is negative.

If you did not need to move the decimal b = 0.

Write your scientific notation number as a x 10^b and read it as "a times 10 to the power of b."

Remove trailing 0's only if they were originally to the left of the decimal point.

Answer:

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Answer:

A compound because it cannot be found on the periodic table

Explanation:

Answer:

alkali metals

Explanation:

alkali metals

The alkali metals, found in group 1 of the periodic table (formerly known as group IA), are very reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell. Therefore, they are ready to lose that one electron in ionic bonding with other elements.

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Answer: D- Alpha

Explanation:

Answer:

65.21g

Explanation:

[tex](48.89 \div 100) \times 63.929 = 31.25 \\ (27.81 \div 100) \times 65.996 = 18.35 \\ (23.3 \div 100) \times 67.002 = 15.61 \\ 31.25 + 18.35 + 15.61 = 65.21[/tex]

Answer:

the respiration rate is the independent varaible ,measured is the indpendent variable i think

Explanation:

Answer:

yes

Explanation:

Answer:

False

Explanation:

because they do not prevent damage they make damage

Answer:

a lot of heat source

Explanation:

Given :

Mass of foil , m = 1.68 g .

Density of foil , [tex]\rho=7.31\ g/cm^3[/tex] .

To Find :

The thickness of the foil .

Solution :

Let , length and breadth is l and b respectively .

Also , height be h .

Volume is given by :

[tex]V=l\times b\times h[/tex]

Density is given by :

[tex]\rho=\dfrac{m}{V}\\\\V=\dfrac{m}{\rho}\\\\l\times b\times h=\dfrac{1.68}{7.31}\\\\l\times b\times h=0.23\\\\h=\dfrac{0.23}{lb}[/tex]

Therefore , thickness of the foil is [tex]\dfrac{0.23}{lb}[/tex] .

Hence , this is the required solution .

Explanation:

Never smoke near a place where hydrogen is generated or being used. Remove all possible sources of flame and sparks. Hydrogen should only be generated and used in a well ventilated out door area. Precautions must be taken to remove all possibilities of fire or explosion.

Answer:

Sun, water, caron dioxide.

Explanation:

They get there energy from those because photosynthesis the sun gives them that energy but the sun goes with water too because the sun and the water help it eat and produce its food and then the carbon is for it to breathe and thats how we have oxygen because the plants take in carbon and then they give out oxygen so thats why we need plants and plants need us.

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Answer:

sulfur, selenium, and oxygen.

Explanation:

I got it right on my test

To solve this we must be knowing each and every concept related to experiment. Therefore, the correct option is option A that is to leave the room and go to an area with fresh air.

Any procedure where measurements are taken and tests are run to support or disprove a hypothesis is referred to as a scientific experiment.

A science class is conducting an experiment that produces noxious fumes. Because of inadequate ventilation, some students begin to feel nauseated and dizzy. The first response should be to leave the room and go to an area with fresh air.

Therefore, the correct option is option A that is to leave the room and go to an area with fresh air.

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Answer:

0.00079

Explanation:

Any zero after the decimal isn’t a significant figure

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 762 kg/m³

We must first convert the volume from cm³ to m³

[tex]1 \: {cm}^{3} = 1 \times {10}^{ - 6} {m}^{3} [/tex]

So 99 cm³ will be

[tex]9.9 \times {10 }^{ - 5} \: \: {m}^{3} [/tex]

So the mass of the material is

[tex]mass = 762 \times 9.9 \times {10}^{ - 5} \\ = 0.075438[/tex]

We have the final answer as

Hope this helps you

Answer:

75438 kg

Explanation:

Answer:

A = 8

B = 8

C = O ( Oxygen )

D = 26

E = 30

F = Fe (Iron)

Explanation:

1)To get "A" we use the following formula

mass number = number of protons + number of. neutrons

15 = number of protons + 7

15 - 7 = number of protons

8 = number of protons

A = 8

2)To find "B"

atomic number = number of protons

Atomic number = 8

B = 8

3)To find "C"

the atomic number is 8 so the element which

has 8 atomic number on periodic table is Oxygen.

C = oxygen

4) To get "D"

Number of protons = atomic number

number of protons = 26

D = 26

5)To get "E"

mass number = number of protons + number of. neutrons

56 = 26 + number of neutrons

56 - 26 = number of neutrons

number of neutrons = 30

E = 30

6) To find "F"

The atomic number is 26 so the element which has 26 atomic number on periodic table is Iron.

hope it helps

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Answer:

30000

Explanation:

all you have to do is multiply by 1000

Answer:

A) It shows how electrons are distributed in the Shells of an Iron atom.

Explanation: Took the test on Edge

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the correct option is option A.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. The given model shows how electrons are distributed in the shells of an iron atom.

Therefore, the correct option is option A.

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Iodine is less reactive

Answer: Iodine is less reactive in comparison to Lithium