B)chemical property
C)physical change
D)physical property
Physical property .
Answer:
i would say Chemical property
Explanation:
Answer:
A. biology
Explanation:
biology is the human body
Answer:
chemistry because A is for human bodies i think ,-,
Explanation:
Answer:
Mass = 7.2 g
Explanation:
Given data:
Mass of water produced = ?
Mass of oxygen = 7.8 g
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 7.8 g/ 32 g/mol
Number of moles = 0.2 mol
Now we will compare the moles of water with oxygen.
O₂ : H₂O
1 : 2
0.2 : 2×0.2 = 0.4 mol
Mass of water:
Mass = number of moles × number of moles
Mass = 0.4 mol × 18 g/mol
Mass = 7.2 g
The speed of an object in a specific direction is expressed in velocity. you do not know an object's velocity until you know speed and distance.
The directional speed of an item in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity.
The speed of an object in a specific direction is expressed in velocity. Unlike speed, velocity is concerned with the movement's direction.
The difference between velocity and speed is how quickly and in which direction an object moves. Velocity in physics refers to speed in a specific direction. We identify a car's speed when we say it goes at 60 km/h.
Thus, you do not know an object's velocity until you know speed and distance.
To learn more about velocity, follow the link;
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The three primary sources of carbon dioxide (CO2) in the atmosphere are the respiration of organisms, the burning of fossil fuels, and deforestation or land use changes.
Carbon dioxide (CO2) is a type of gas that naturally exists in the atmosphere. It is primarily released from three key sources, which include:
The three primary sources of carbon dioxide (CO2) in the atmosphere are the respiration of organisms, the burning of fossil fuels, and deforestation or land use changes.
The three primary sources of carbon dioxide (CO2) in the atmosphere are the respiration of organisms, the burning of fossil fuels, and deforestation or land use changes.
Yet due to human activities like industrialization and deforestation, the amounts of CO2 in the atmosphere have been increasing at an unprecedented rate, leading to global climate change.
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