Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed.

Answer:

223.21 g /mol

Explanation:

To find the molar mass (g/mol) of a substance, you have to add the amu's of all the elements together. First you have to determine how of element there are:

Mg=1, Cl=2, O=8.     Now you multiply the amu of each element by the number of elements in the compound. Then add them together. The amu of an element and its molar mass are the same.

1(24.31 g/mol) + 2(35.45 g/mol) + 8(16.00 g/mol) = 223.31 g/mol

223.31 g/mol is the molar mass of the given compound. The molar mass of a material is a bulk attribute rather than a molecular one.

The ratio among the mass with the quantity of a substance (measured in mole) of any sample of a chemical compound is known as the molar mass (M) in chemistry. The compound's molar mass represents an average over numerous samples, which frequently have different masses because of isotopes. A terrestrial average as well as a function of the relative distribution of the isotopes of the component atoms on Earth, the molar mass is most frequently calculated using the standard atomic weights.

Molar mass=1(24.31 g/mol) + 2(35.45 g/mol) + 8(16.00 g/mol)

= 223.31 g/mol

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Answer:

7.0

Explanation:

P1V1=P2V2 if temperature and moles are constant, which they appear to be

3.5*2.5=1.25x

x=8.75/1.25

x=7

Explanation:

Answer:

A. cooling causes condensation

Explanation:

air is cooler at higher altitude in the troposphere.

Answer:

use litmus paper.

Explanation:

if red litmus paper turns blue solution is basic

blue litmus paper will remain blue if solution is basic

We can establish whether the solution in step two of experiment 4 is basic by carrying out litmus paper test. If the solution turns red litmus paper blue, then it is basic

In order to establish whether a solution is acidic, basic or neutral, litmus paper test could be carried out to know.

An acidic solution will turn blue litmus paper red

A basic solution will turn red litmus paper blue

A neutral solution does not have effect on blue or red litmus paper.

Therefore, in order to establish whether solution that resulted from adding sodium hydroxide to copper(II) nitrate in step two of Experiment 4 is basic, we could carry out a litmus paper test.

If the solution turns red litmus paper blue, then it is basic.

Hence, we could establish whether the solution in step two of experiment 4 is basic by carrying out litmus paper test. If the solution turns red litmus paper blue, then it is basic.

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Answer:

V= in square root 2KE/M=2(143.3J)/0.047kg=6097.8723 in square root around 78.1 approxmete

Kinetic energy is directly proportional to the mass and square of speed of a moving body. Here, the speed of the body of mass 47 g or 0.47 kg with akinetic energy of 143.3 J is 24.6 m/s.

Kinetic energy is a generated by virtue of motion of a body. It is half of the product of mass and square of velocity. Thus as mass is increase kinetic energy also increases.

If velocity is doubled then kinetic energy increases 4 times. Since velocity or speed is in square in the equation written as follows:

KE = 1/2 mv² . Here, m is the mass and v be the speed.

Here, kinetic energy is given 143.3 J and mass of the moving body is 0.47 kg and speed can be calculated by rearranging the equation as follows:

[tex]v = \sqrt{\frac{KE \times 2 }{m } \\\\\\ = \sqrt{\frac{43.3 J \times 2}{0.47 kg} \\\\\\\\\\\\\\ = 24.6 m/s[/tex]

Hence, the speed of the body of mass 47 g or 0.47 kg with akinetic energy of 143.3 J is 24.6 m/s.

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Answer:

1 molecule = 40.00 grams

1.52 molecules = 1.52*40.00

                         = 60.8 grams

Answer:

No, we change the Lead and Silver

Explanation:

The freezing temperature of lead decreases around the curves of AO as pure silver is applied to the lead material. Thus, in the case of platinum, AO is the freezing temperature curve of lead. Strong lead is in balance with fluid melting along this gradient (silver in lead solution).

Answer:

Explanation:

The volume is the same in both cases so the formula is

P1/T1 = P2/T2

T1 = 20 + 273 = 293 You have to convert Celcius to degrees Kelvin.

T2 = 65 + 273 = 338 degrees Kelvin

P1 = 2.0 atmospheres.

2.0 / 293 = P2/ 338

2*338 / 293 = P2

P2 = 676 / 293

P2 = 2.31 atmospheres

Answer:

arsenic (As)

Explanation:

Answer:

is there an image

Explanation:

Answer:

equilateral (B)

Explanation:

it is the only word which relates to triangles and their shape - plus, its logical and makes sense.

Answer:

its b

Explanation:

Answer:

Can be used to do work,and it can be converted to potential.

Explanation:

Answer: can it be used to do work

Explanation:

[tex]0.68 \: moles \: calcium \times \frac{6.02 \times {10}^{23} \: calcium \: atoms }{1 \: mole \: calcium} \\ [/tex]

The (( mole calcium ))s are simplified so the answer is based on the number of calcium atoms.

[tex]0.68 \times 6.02 \times {10}^{23} = 68 \times {10}^{ - 2} \times 602 \times {10}^{ - 2} \times {10}^{23} \\ [/tex]

[tex] = 68 \times 602 \times {10}^{ - 4} \times {10}^{23} = 40936 \times {10}^{19} \\ [/tex]

[tex] calcium \: atoms = 40936 \times {10}^{19} \\ [/tex]

_________________________________

And we're done.

Thanks for watching buddy good luck.

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Answer:

See below

Explanation:

INdependent = amount of med given

Dependent = recovery time    <==== this 'depends' on the amount of medicine given

Answer:

500g

Explanation:

Answer:Suppose that during the Icy Hot lab that 65 KJ of energy were transfered to 450 g of water at 20 degrees C. What would have been the final temerpatur

Explanation:

Answer:

Mitosis meiosis

Explain:

Mitosis is where the cell splits into 2 more cells (diploid)

Meiosis is where the cell splits into 2, and then split again, making 4 (haploid)

Answer:

the two components in colloid are dispersed phase and dispersing medium

I hope this helps

Answer:

6.60mg N / mL

Explanation:

All nitrogen is converted in NH₃ that react with the HCl, thus:

NH₃ + HCl → NH₄⁺ + Cl⁻

In the problem, the excess of HCl reacts with NaOH, thus:

HCl + NaOH → NaCl + H₂O

The moles of NaOH = Moles of HCl in excess is:

4.16mL = 4.16x10⁻³L * (0.0155mol / L) = 6.448x10⁻⁵mol HCl in excess

Initial moles of HCl are:

10x10⁻³L * (0.0390mol / L) = 3.9x10⁻⁴moles HCl

That means the moles of HCl that reacts = Moles of NH3 = Moles of N are:

3.9x10⁻⁴ moles - 6.448x10⁻⁵moles = 3.2552x10⁻⁴ moles N.

To convert these moles to grams we need to use molar mass of N = 14.01g/mol:

3.2552x10⁻⁴ moles N * (14.01g/mol) = 4.56x10⁻³g * (1000mg / g) =

4.56mg of N

And volume in mL is:

691 μL * (1mL /  1000μL) = 0.691mL

Concentration in milligrams per mililiter is:

4.56mg N / 0.691mL =

Answer: You can give canned food to the poor or try helping people by donating money.

Explanation:

When you give canned food or packets of water the people who haven't eaten in ages or drank clean water can maybe help boost imunity.

When you give money you can help people buy things they need to survive this pandemic.

Answer:

Keep a positive attitude

Explanation:

 Dont worry about thinks that put you down and try to think about something that helps keep up your spirits. For example, thinks that you are proud of.

Try to think a little less of  things like this, ¨Great, now we have a pandemic, now the world is going to end¨ but to thy think more of ¨Hey, this is a time where people need help the most, lets do our best to help them. I believe I can make the world a better place because I have the power of postivity.¨

Put a smile n your face, stand up and say ¨today can be a great day!!¨

Explanation:

hope this helps!!! happy learning!!!!

Answer:

There are 40.25 days in 5.75 weeks

Answer: 40.25

Hope this helped! :)

Answer:

The weight percent of NaCl in the container​ is 21.5%

Explanation:

Given that,

Mass of NaCl = 168.90 gram

Mass of water = 616.00 grams

We need to calculate the weight percent of NaCl in the container​

Using formula of percentage of weight

[tex]weight\ \%\  of\ component\ of\ the\ solution =\dfrac{weight\ of\ the\ component\ in\ the\ solution}{total\ weight\ of\ the\ solution}\times100[/tex]

Put the value into the formula

[tex]weight\ \%\  of\ component\ of\ the\ solution =\dfrac{168.90}{168.90+616.00}\times100[/tex]

[tex]weight\ \%\  of\ component\ of\ the\ solution=21.5\%[/tex]

Hence, The weight percent of NaCl in the container​ is 21.5%

Answer:

qualitative data :           quantitative data :      

circular in shape            75 colonies ...          

stained purple               200 purple ..

spreads across plate    55 colonies ...          

Explanation:

i got it right :) .

Answer:

Same XD  Have a bless day ^﹏^^O^^O^^O^

Explanation:

Answer:

See attached picture.

Explanation:

Hello.

As you can see on the attached picture, this Lewis structure requires all the elements to attain eight electrons after bonding, that is why the phosphorous is bonded with the two carbon atoms via a single bond with the carbon having the three fluorine atoms and a double bond with the carbon having the two carbon atoms.

Such arrangement is due to the fact that:

- P gets eight electrons by obtaining three from the two sided carbon atoms.

- The first carbon gets eight electrons from its initial four, three provided by each surrounding fluorine and one from the central phosphorous.

- Each fluorine gets eight valence electrons from their initial seven and one from the available carbon atoms.

Best regards.

Answer:

C₂ = 0.60 M

Explanation:

Step 1: Given data

Step 2: Calculate the concentration of the diluted dextrose solution

We will use the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 1.0 M × 15 mL / 25 mL

C₂ = 0.60 M

Answer: atoms

Explanation: cell membrane is in a cell