You are given a sample of an unknown solution and are tasked with determining the density. The solution is miscible with water, so you cannot use a float test. To complete this task, you begin by obtaining a clean dry beaker and measure its mass on a balance (120.3621 g). You then use a pipet to transfer the liquid into the beaker. The initial reading on your pipet is 4.126 mL and after you have dispensed the liquid the pipet reads 6.518 mL. You then obtain the mass of the beaker with the liquid inside (123.0194 g).
_____g/mL

Answer:

Number of protons in Carbon - 14 atom [tex]6[/tex]

Explanation:

The atomic number of carbon 14 atom is [tex]14[/tex]

Number of neutrons in the nucleus of Carbon-14 atom [tex]= 8[/tex]

Atomic number is equal to the sum of neutrons and protons

Number of protons in Carbon - 14 atom [tex]= 14 -8 = 6[/tex]

I have understood that the meaning of life is to have a vision and live a purposeful life.

Living a meaningful life is concerned about the essence of waking up everyday and having something meaningful that you're doing or engaging yourself into what you have vision about.

Life is good and lively when you have a vision, this vision is drive by a passion for a particular thing. When you're visionary, you will be happy every day and it is visionaries that change the world positively.

Over an extended period of time, this vision will be brought into life where people can benefit from it. Here, is where purpose comes in.

When you're able to impact positively into another people's life and make their life easier, you're living a purposeful life.

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Answer:

False.

Explanation:

I majored in Chemistry

These are reactions that transfer energy to the surroundings (ie the energy exits from the reaction, hence the name exothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. A thermometer is used to detect the temperature increase.

Examples:

Combustion

Neutralisation between acids and alkali

These are reactions that take in energy from the surroundings (ie energy enters the reaction, which will help you to remember the name endothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become colder. A thermometer is used to detect the temperature decrease.

Example:

Electrolysis

Answer:

1) food molecules enter receptors .....

2) The sensory receptors sends the message....

3) The message reaches the brain

4) the brain procces the information it recieved...

5) The brain stores the info  ...

6) The brain retrieves the info . ....

(I hope its clear ! I hope its right too ;) )

Answer:

becuase of the sun

in different places some places would be cold

Answer:

0.03 L

Explanation:

Step 1: Given data

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

Answer:

Explanation:

Ionization energy of hydrogen atom is 13.6 eV . This energy will be provided by energetic proton , the kinetic energy of which is 1000 eV.  The kinetic energy of ionized electron is 15.2 eV . Kinetic energy of proton produced from from the ionization of hydrogen or the nucleus of the hydrogen atom is 4.3 eV . All these energy must have come from kinetic energy of initial proton.

So kinetic energy of projectile proton after collision

= 1000 - ( 13.6 + 15.2 + 4.3 ) eV.

= 966.9 eV .

Answer:

increase

Explanation:

Reactions that are initiated by light are called photochemical reactions. The brighter the light, the faster the reaction.

Answer: An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure. 17.5 “Temperature and Reaction Rate”).

Explanation:

Explanation:

your answer willing be 8.7

Answer:

Explanation:

you sack

Answer:  A pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions

Explanation:

Answer:

[tex]P_{Ar}=7.068mmHg[/tex]

Explanation:

Hello!

In this case, according to the given percent of argon in our atmosphere, it is possible to compute the pressure contributed by it as shown below:

[tex]P_{Ar}=P_{atm}*0.93\%[/tex]

Thus, we plug in to obtain:

[tex]P_{Ar}=760mmHg*0.0093\\\\P_{Ar}=7.068mmHg[/tex]

Best regards!

The pressure of the argon gas will be equal to [tex]P_{Ar}=7.068 \rm\ mmHg[/tex]

Pressure is defined as the normal force acting on any surface in the case of gases it is the normal force acting on the surface of the earth.

now it is given in the question that the Argon contains 0.93%  part in the atmosphere.

So here are the calculations

[tex]\rm P_{Ar}=P_{Atm}\times 0.93[/tex]%

[tex]\rm P_{Ar}=700\times 0.93[/tex]%

[tex]\rm P_{Ar}=7.068\ mmHg[/tex]

Thus the pressure of the argon gas will be equal to [tex]P_{Ar}=7.068 \rm\ mmHg[/tex]

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Answer:

A

Explanation:

Answer:

1.31 × 10^47

Explanation:

1 mol of Fe =

[tex]1 \: mol \: of \ fe = 6.02 \times 10 ^{23} \ \\ x \: mol \: offe \: = 7.88 \times {10}^{24} \\ \\ \\ so \: 7.88 \times {10}^{24} \div 6.02 \times {10}^{23} \\ \\ x = 1.31 \times {10}^{47} [/tex]

Answer:

no se ingles todavía no aprendo a hablar inglés ya si estuvieran en español los respondia

Answer:

Not exactly But you can take the slope of the curved portion and the slope of the flatline.

It wont do you much good since your working for absorbance but if you ever see something like a temperature change you can use the slope(s) to find freezing points/melting

Explanation:

If you need to submit a slope you could use a best fit which is just point to point or you could break it up like i mentioned

Answer:

Answer:

Here is the answer ⬆️⬆️⬆️⬆️⬆️

Answer:70L

Explanation:

The volume occupied by 100g of oxygen gas at STP is 70L.

1 mole of a gas at STP occupies 22.4 L volume.

The same goes for oxygen gas, [tex]O_2[/tex]. 1 mole of [tex]O_2[/tex] occupies 22.4L volume.

Now the molar mass of [tex]O_2[/tex] is = 32g

So the number of moles of [tex]O_2[/tex] in 100g is

n = 100/32

n = 3.125 moles

Volume occupied by 3.125 moles or 100g of [tex]O_2[/tex] is

V = 3.125 × 22.4 L

V = 70 L volume is occupied by 100g of oxygen gas.

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Answer:

1.00 mol

Explanation:

Step 1: Given data

Molecules of water: 6.02 × 10²³ molecules

Step 2: Calculate the number of moles corresponding to 6.02 × 10²³ molecules of water

In order to convert molecules to moles, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.

6.02 × 10²³ molecules × 1 mol/6.02 × 10²³ molecules = 1.00 mol (we keep 3 significant figures)

Answer:

1.28 mol NaCl

Explanation:

Find the mass of NaCl by adding the two elements atomic mass

Na: 22.99

Cl: 35.45

22.99+35.45=58.44 g

Now convert to moles

74.8 g / 58.44 g = 1.27994524298 mol