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2 years ago

Electrical bonding refunding quick check!!

Chemistry

1 answer:

luda_lava [24]2 years ago

5 0

Answer:

1. More data should be collected to get a more reliable average

2. A boiling point at 1.5 atmospheres could be predicted fairly well

3. The actual boiling point is probably between 34 C and 40 C

4. By taking 10 measurements of each of the five liquids and finding an average

5. The thermometer being used might need to be recalibrated

Explanation:

Took the quick check

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A sample of gas is held at 100oc at a volume of 20 L.if the volume is increased to 40 L what is the new temperature of the gas i

ElenaW [278]

Answer:

470 °C

Explanation:

This looks like a case where we can use Charles’ Law:

$\dfrac{V_{1}}{T_{1}} =\dfrac{V_{2}}{T_{2}}$

Data:

V₁ = 20 L; T₁ = 100 °C

V₂ = 40 L; T₂ = ?

Calculations:

(a) Convert the temperature to kelvins

T₁ = (100 + 273.15) K = 373.15 K

(b) Calculate the new temperature

$\begin{array}{rcl}\dfrac{V_{1}}{T_{1}}& =&\dfrac{V_{2}}{T_{2}}\\\\ \dfrac{\text{20 L}}{\text{373.15 K}} &=&\dfrac{\text{40 L}}{T_{2}}\\\\{\text{15 000 K}} & = & 20T_{2}\\T_{2} & = &\dfrac{\text{15 000 K}}{20 }\\\\T_{2} & = & \textbf{750 K}\\\end{array}$

Note: The answer can have only two significant figures because that is all you gave for the volumes.

(c) Convert the temperature to Celsius

T₂ = (750 – 273.15) °C = 470 °C

3 0

3 years ago

g Consider the reaction when aqueous solutions of potassium hydroxide and ammonium bromide are combined. The net ionic equation

vichka [17]

Answer:

K^+(aq) + Br^-(aq) -----> KBr(aq)

Explanation:

The net ionic equation shows the actual reaction that occurs in the system. The molecular reaction equation includes the spectator ions but the net ionic equation does not include the spectator ions.

Spectator ions do not participate in the main reaction going on in the system.

Hence, for the reaction of potassium hydroxide and ammonium bromide, we have;

K^+(aq) + Br^-(aq) -----> KBr(aq)

8 0

4 years ago

a motorcycle is moving along a road for a distance of 20KM. After 2 hours what is it's the average speed?

JulijaS [17]

Answer:

If it took the motorcycle 2 hours to cover 20km, then the average speed is 10km per hour.

Explanation:

Speed is equal to distance over time. So 20km divided by 2 hours is 10 km per hour.

Please mark brainliest!!! Thanks.

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3 years ago

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An ingredient that dissolves in a solution is called a

Marta_Voda [28]

Try solvent. I hope this helps!!!

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4 years ago

What is the formula for hexaboron tetrabromide

Sveta_85 [38]

Answer:

The formula for the compound isB6Br7

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3 years ago