Based on the activity series you created in part C, predict whether there would be a chemical
reaction or no reaction when the listed pairs of substances are combined.
BI U X
X Х.
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А -
А
EEE 를 들 들
Substances
Reaction or No
Reaction
I
magnesium and copper(1)
sulfate
iron and magnesium sulfate
copper and iron(III) nitrate
magnesium and hydrochloric
acid

Answer:

science?? i guess

:\

Explanation:

Answer:

The 5000 kilogram truck

Explanation:

The 5000 kilogram truck is using less force to move vs the 10000 kilogram truck because 5000 kilogram truck is lighter and so needs half the speed as the 10000 kilogram truck.

Answer:

The answer is d

Explanation:

Answer:

The answer is D

Explanation:

Answer:

Filtration is the removal or filtering of the toxins and waste products from the blood by the kidney. They are excreted from the body through urine. In general, filtration refers to the passing of a liquid through a filter. In the human body, the kidney functions as a filter.

Explanation:

Answer:

Lithium will lose 1 electron in order to become stable

Answer:

lithium has 3 electrons so it has 3 protons and 3 electrons two electrons will shell 1 and then it will shell 2

Explanation:

this is what i learned

hope it helps

Answer:group 1A(1)

Explanation:

Answer:

1.5232 × 10^-6 grams

Explanation:

Answer:p=m/v

p=(292.2-130.2)/200

p=0.8100g/ml

Explanation:

Density of a substance is the ratio of its mass to volume. The density of the oil filled in a  200.01 ml beaker is 0.815 g/ml.

Density of a substance is the mass  per volume. Thus we het how much of its particles are located per one unit of volume.

Mathematically density can be written as mass/ volume. The mass of the beaker containing oil is given as 293.2 g. The mass of beaker itself is 130.2 g. Hence, mass of oil is 293.2 - 130.2 = 163 g.

Volume of the oil is 200 ml. Thus density is 163 g/200 ml = 0.815 g/ml.

Hence, the oil in the beaker with 200 ml volume and 163 g mass have a density of 0.815 g/ml.

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Answer:

B. Living organism can be created from nonliving matter

Explanation:

The theory of spontaneous generation states that life could come from non-living things.

Answer:

To measure the density of a liquid you do the same thing you would for a solid. Mass the fluid, find its volume, and divide mass by volume. To mass the fluid, weigh it in a container, pour it out, weigh the empty container, and subtract the mass of the empty container from the full container.

Explanation:

Answer:

[tex] \rho = \frac{mass}{vol} \\ = \frac{75 \: g}{25 \: ml} = 3g .{ml}^{ - 1} [/tex]

Answer:  See below

Explanation:  a.  The mass of an element is composed of:

protons:     1 amu each

neutrons:   1 amu each

electrons:   0 amu each

Only the protons and neutrons are counted in the atomic mass of an element

b.  Electrons are assigned a mass of 0.  They do have a mass, but it is exceedingly small compared to the protons and neutrons, so they are left out of the calculation of an element's mass.

c.  An element becomes unstable if the neutrons exceed the protons by a certain ratio, dependent on the element.

Answer:

I= true

III=false

iv=true

The given elements are Na, Ag and Au.

1. Sodium(Na)

Mass number= 23 u

Atomic number=11

Number of protons= Number of electrons= Atomic number=11

Number of neutrons= Mass number- Number of protons=23-11=12

2. Silver (Ag)

Mass number= 108 u

Atomic number= 47

Number of protons= Number of electrons= Atomic number= 47

Number of neutrons= Mass number- Number of protons=108-47=61

3. Gold (Au)

Mass number= 197 u

Atomic number= 79

Number of protons= Number of electrons= Atomic number= 79

Number of neutrons= Mass number- Number of protons= 197-79=118

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CAN YOU BRAINLEST ME

Answer:

7.96 x 10^-22 J

Explanation:

Answer:

Please click above answer.

1. Same fossils have been found on different continents

2. Their coastlines fit together

3. Mountain ridges, land formations, glacial evidence, rocks…

Btw, can you describe the rotation of North America? I’m having trouble with continental drift too-

Answer:

D) n = 2.5, ℓ = 0, mℓ = 0

Explanation:

According to the rules governing acceptable quantum numbers, the value for n must be an integer. Therefore, the set {n = 2.5, ℓ = 0, mℓ = 0} is not allowed.

Answer:

hh

Explanation:

For the reaction of deprotonation of formic acid, the concentration of HCOO⁻ at equilibrium is 0.0151 M if the initial concentration of formic acid is 1.35 M.  

The reaction of deprotonation of formic acid is the following:

CHOOH + H₂O ⇄ HCOO⁻ + H₃O⁺

At the equilibrium we have:

CHOOH + H₂O ⇄ HCOO⁻ + H₃O⁺    (1)

1.35 - x                         x           x

The acid equilibrium constant for this reaction is:

[tex] K_{a} = \frac{[HCOO^{-}][H_{3}O^{+}]}{[CHOOH]} = 1.7 \cdot 10^{-4} [/tex]  (2)

Entering the values of [CHOOH] = 1.35-x, [HCOO⁻] = [H₃O⁺] = x, into equation (2) we have:

[tex] 1.7 \cdot 10^{-4} = \frac{[HCOO^{-}][H_{3}O^{+}]}{[CHOOH]} = \frac{x^{2}}{(1.35 - x)} [/tex]  

[tex]1.7 \cdot 10^{-4}(1.35 - x) - x^{2} = 0[/tex]

After solving the above quadratic equation and taking the positive value for x (concentrations cannot be negative), we have:

[tex] x = [HCOO^{-}] = [H_{3}O^{+}] = 0.0151 M [/tex]

Therefore, the concentration of HCOO⁻ at equilibrium is 0.0151 M.

Learn more about the equilibrium constant here:

I hope it helps you!

Answer:

d

Explanation:

thanks so much to you welcomeeee for me and my brother in the same situation and he does it for a year of life in your relationship

Answer:

See below

Explanation:

2C2H6 + 7O2 = 4CO2 + 6H2O

2C2H2 + 5O2 = 4CO2 + 2H2O

A lot of this is trial and error.  I start from left to right.  For the first reaction, you had

C2H6 + O2  =  CO2  +  H2O

You have 2 carbons on the left so you can try adding a 2 in front of the carbons on the right and keep going from there.  Now you have

C2H6  +  O2  =  2CO2  + H2O

You now have 2 C on each side.  C2 is the same as 2C.

The next step is to look at the hydrogens on the left.  You have 6 so you need 6 on the right.  You can add a 3 in front of the H on the right.  The H already has a subscript of a 2 so having the 3 in front will now make it 6H.  You now have this

C2H6  +  O2  =  2CO2  +  3H2O

So your C are equal (2 on each side) and your H is equal (6 on each side).  All that is left is the O.  So far you have 2 on the left but you have 7 on the right (4 from the 2CO2 and 3 more from 3H2O).  Since you have an even number on one side and an odd number on the other, there is no way to make this work.  So it's time to start over.

My next step was to put a 2 in front of C2H6 and keep going as we did above.  Start with this

2C2H6   + O2  = CO2  + H2O

You have 4 C on the left.  So you need to add a 4 in front of CO2 to get 4 C on the right.  Now you have this

2C2H6  +  O2  =  4CO2  +  H2O

Now on the left you have 12 H (2 in front times the 6 subscript on the H).  You need to have 12 on the right.  We can get that by putting a 6 in front of the H2O ( again the 6 in front times the 2 subscript of the H is 12 total).  You have this now

2C2H6  +  O2  = 4CO2  +  6H2O

You now have 4 C on both sides, 12 H on both sides.  All that is left now is the O.

On the right side, you have a total of 14 ( 8 from the 4CO2 and 6 from 6H2O).  So you'd need to add 7 in front of the O2 to make it 14.

You're done.  4 C on both sides, 12 H on both sides and 14 O on both sides.

The second equation I just did the same process.

Answer:

285 kJ

Explanation:

potential energy

= m g h

= 95,000 g × 10 m/s² × 300 meters

= 95 kg × 10 m/s² × 300 meters

= 950 kgm/s² × 300 meters

= 285,000 J

= 285 kJ

Explanation:

The added greenhouse gases absorb the heat. They then radiate this heat. Some of the heat will head away from the Earth, some of it will be absorbed by another greenhouse gas molecule, and some of it will wind up back at the planet's surface again. With more greenhouse gases, heat will stick around, warming the planet.

Answer:

it does not have a control group

The final pressure of the gas mixtures is 72.48 atm.

The given parameters;

The number of moles of the gases is calculated as follows;

[tex]number \ of \ moles \ of \ oxygen = \frac{88}{16} = 5.5 \ moles\\[/tex]

[tex]number \ of \ moles \ of \ argon = \frac{33}{40} = 0.825 \ moles\\[/tex]

The total number of moles of the gas mixture;

= 5.5 + 0.825

= 6.325 moles

The final pressure of the mixture is calculated as follows;

PV = nRT

[tex]P = \frac{nRT}{V} \\\\P = \frac{6.325\ mol \times (0.0821 \ L.atm/mo.K) \times (62+273)}{2.4 \ L} \\\\P = 72.48 \ atm[/tex]

Thus, the final pressure of the gas mixtures is 72.48 atm.

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Answer:

2 electrons is the correct answer hope u pass !!!!!!

If an element has three valence electrons, it is most likely a metal.

In the periodic table, metals are found towards the left hand side of the table. Metals have fewer valence electrons than nonmetals. In the periodic table, there are more metallic than nonmetallic elements.

Metals of group 13 typically have three valence electrons. Hence, if an element has three valence electrons, it is most likely a metal of group 13.

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