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2 years ago

GIVING BRAINLIEST 100 points

Chemistry

1 answer:

ELEN [110]2 years ago

6 0

Answer:

1. Independent variables: temperature, distance, concentration gradient

Dependent variables: The water and food dye because it is being used to measure the rate of diffusion

2. The tube with a higher temperature would have a higher rate of diffusion than a tube with a lower temperature because introduction of heat helps the particles move farther and faster apart

3. A controlled variable can be the amount of food dye used in each tube so you can record an accurate rate of which the food die gets diffused.

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What would the volume of gas be at 150 c if it had a volume of 693 ml at 45 c

marissa [1.9K]

Answer:

$\boxed{\text{922 mL}}$

Explanation:

The pressure is constant, so we can use Charles' Law to calculate the volume.

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

Data:

V₁ = 693 mL; T₁ = 45 °C

V₂ = ?; T₂ = 150 °C

Calculations:

(a) Convert temperature to kelvins

T₁ = ( 45 + 273.15) = 318.15 K

T₂ = (150 + 273.15) = 423.15 K

(b) Calculate the volume

$\dfrac{ 693}{318.15} = \dfrac{ V_{2}}{423.15}\\\\2.178 = \dfrac{ V_{2}}{423.15}\\\\V_{2} = 2.178 \times 423.15 = \boxed{\textbf{922 mL}}$

5 0

3 years ago

Sodium chloride can be produced by the reaction of sodium metal with chlorine gas. Which is the limiting reactant if 6.70 moles

Alecsey [184]

Answer:

Chlorine gas.

Explanation:

Hello!

In this case, the undergoing chemical reaction is:

$2Na+Cl_2\rightarrow 2NaCl$

Thus, given the moles of reacting both sodium and chlorine, we compute the moles of sodium chloride yielded by each reactant by considering the 2:2 and 1:2 mole ratios:

$n_{NaCl}^{by\ Na}=6.70molNa*\frac{2molNaCl}{2molNa}=6.70molNaCl \\\\n_{NaCl}^{by\ Cl_2}=3.20molCl_2*\frac{2molNaCl}{1molCl_2}=6.40molNaCl$

Thus, since chlorine yields less moles of sodium chloride, we infer it is the limiting reactant.

Best regards!

3 0

3 years ago

What are 4 ways you can improve your skeletal system health?

NARA [144]

Answer:

1. get vitamin c

2. get your bone mineral density tested

3. don't smoke or drink excessively

4. start weight-bearing exercise

Explanation:

helps improve skeletal system

7 0

2 years ago

Balance this chemical reaction H2+N2–> NH3

GaryK [48]

Answer:

3H2+N2-> 2NH3

Explanation:

This is the balanced chemical equation for the above reaction

6 0

3 years ago

What is one characteristic of a rain forest?

Svetradugi [14.3K]

Different layers makes the most sense due to the fact it can’t be a dry climate because of the vegetation, also there is a lot of plants so minimal plants isn’t an option, and the temperature in a rain forest is usually very humid so cold temperatures can’t be an answer.

7 0

3 years ago

*GIVING BRAINLIEST* *100 points*

GIVING BRAINLIEST 100 points