Answer: A physical change is a change that can be undone.
Explanation: An example of this is mixing red blocks, green blocks, and blue blocks. You can easily separate them.
Answer:
The volume of carbon dioxide gas generated 468 mL.
Explanation:
The percent by mass of bicarbonate in a certain Alka-Seltzer = 32.5%
Mass of tablet = 3.45 g
Mass of bicarbonate =
Moles of bicarbonate ion =
According to reaction, 1 mole of bicarbonate ion gives with 1 mole of carbon dioxide gas , then 0.01840 mole of bicarbonate ion will give:
of carbon dioxide gas
Moles of carbon dioxide gas n = 0.01840 mol
Pressure of the carbon dioxide gas = P = 1.00 atm
Temperature of the carbon dioxide gas = T = 37°C = 37+273 K=310 K
Volume of the carbon dioxide gas = V
(ideal gas equation)
1 L = 1000 mL
0.468 L =0.468 × 1000 mL = 468 mL
The volume of carbon dioxide gas generated 468 mL.
F₂ + 2NaBr→ 2NaF +Br₂
The chemical equation above show the conservation of matter because
The number of F atoms in the reactants equal the number of F atoms in the product (answer C)
<u><em>Explanation</em></u>
According to the law of mass of matter conservation, the number of atoms in the reactants side should be equal to number of atoms in products side.
For example in reaction above the number of F atoms in reactants side equal the number of F atoms in the products side.Therefore the equation above show the conservation of matter.
Answer:
Venus planet
Explanation:
Venus is the second natural planet that is situated from the sun. It is the planet that is named after the goddess of love and beauty. It is the second natural brightest planet after the moon in the sky.
Venus is also called an identical sister of earth. It is situated nearby the orbit of the earth. It is territorial. It is the primary target for the interdisciplinary explanation.
It is the planet that is first which is beyond earth has been visited by the spacecraft. This planet has a rocky body like the earth.