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Tom [10]
3 years ago
7

Which of the following statements is true? a. A technological society has no impact on the environment. b. A technological socie

ty has a completely positive impact on the environment. c. A technological society has both a positive and negative impact on the environment d. A technological society has a completely negative impact on the environment. Please select the best answer from the choices provided A B C D
Chemistry
1 answer:
djverab [1.8K]3 years ago
8 0

Answer:

The invention of the wheel had an important impact on farming.

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Assessment started: undefined.
Vilka [71]
B) the bacteria that live in the intestine of a rabbit
6 0
3 years ago
A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what i
IRINA_888 [86]

Answer : The pressure after the temperature change is, 0.752 atm

Explanation :

Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.

P\propto T

or,

\frac{P_1}{T_1}=\frac{P_2}{T_2}

where,

P_1 = initial pressure = 0.82 atm

P_2 = final pressure = ?

T_1 = initial temperature = 21^oC=273+21=294K

T_2 = final temperature = -3.5^oC=273+(-3.5)=269.5K

Now put all the given values in the above equation, we get:

\frac{0.82atm}{294K}=\frac{P_2}{269.5K}

P_2=0.752atm

Thus, the pressure after the temperature change is, 0.752 atm

4 0
3 years ago
Why does the water turn blue after some time when blue ink is dropped in water? Which property
zepelin [54]

Answer:

Particles are constatantly moving and diffusing

This is possible because of diffusion

Explanation:

Hope this helps

7 0
3 years ago
All modern fertilizers use PO43- as a source of phosphorus. Use your knowledge of the old methods to determine the moles of phos
tamaranim1 [39]

Answer:

The answer is 0.023 moles of phosphorus

Explanation:

The 15-15-15 fertilizer is a fertilizer of great versatility, made with nitrogen, phosphorus and potassium, which makes it one of the fertilizers most used for fertilizer in the sowing plant, thus covering the crop requirements from planting. .

This fertilizer consists of 14.25% phosphorus pentoxide (P2O5). Therefore, we have to remove 14.25% at 10 grams of 15-15-15 fertilizer to calculate the moles of phosphorus. As follows:

Grams of P2O5 = 10 g x 0.1425 = 1.425 g

We calculate the molecular weight of phosphorus. We use the periodic table:

Phosphorus molecular weight = 2 x 30.97 = 61.94 g/mol

Now we calculate the moles of phosphorus in the fertilizer:

Phosphorus moles = 1,425 g/61.94 g/mol = 0.023 moles

8 0
3 years ago
Na + CI2 =2NaC is It balanced
scoray [572]

Answer:

no, the correct answer is NaCI

Explanation:

you're welcome

3 0
3 years ago
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