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coldgirl [10]
3 years ago
11

Inventos de la física que estén entre los 800 años y 1500 Ocupó 15 porfa

Chemistry
1 answer:
a_sh-v [17]3 years ago
6 0
Creados entre los 800 y los 1500 o inventos que llevan de creación ese tiempo,puedes ser la pregunta un poco específica?
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Please help ! its urgent!!
ArbitrLikvidat [17]

Answer:

D

Explanation:

Respiration is the process by which you get energy from food. So energy in food is converted to a form that can be used by the body

5 0
3 years ago
A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new
Artyom0805 [142]

Answer: There are now 2.07 moles of gas in the flask.

Explanation:

PV=nRT

P= Pressure of the gas = 697 mmHg = 0.92 atm  (760 mmHg= 1 atm)

V= Volume of gas = volume of container = ?

n = number of moles = 1.9

T = Temperature of the gas = 21°C=(21+273)K= 294 K   (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm\K mol

V=\frac{nRT}{P}=\frac{1.9\times 0.0821 \times 294}{0.92}=49.8L

When more gas is added to the flask. The new pressure is 775 mm Hg and the temperature is now 26 °C, but the volume remains same.Thus again using ideal gas equation to find number of moles.

PV=nRT

P= Pressure of the gas = 775 mmHg = 1.02 atm  (760 mmHg= 1 atm)

V= Volume of gas = volume of container = 49.8 L

n = number of moles = ?

T = Temperature of the gas = 26°C=(26+273)K= 299 K   (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm\K mol

n=\frac{PV}{RT}=\frac{1.02\times 49.8}{0.0821\times 299}=2.07moles

Thus the now the container contains 2.07 moles.

6 0
3 years ago
What is the joining of atoms to form new substances called?
kirill115 [55]
Chemical bonds is the answer
3 0
3 years ago
Which statement correctly describes the nucleus of the atom?
Dmitrij [34]

Answer:

llllllllllkkkll

(Answer:D)

3 0
3 years ago
Choose all the answers that apply.
Rashid [163]
B:Creates energy through fusion reactions
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3 years ago
Read 2 more answers
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