Plants make glucose and oxygen by taking in carbon dioxide and water.
Plants take in oxygen and carbon dioxide to make glucose and water.
Plants take in oxygen and water to make carbon dioxide and glucose.
Plants take in glucose and carbon dioxide to make water and oxygen.
26
Under what condition will a marshmallow and a rock fall at the same speed?
In the water
The marshmallow must be thrown down with greater force
This can never happen, because of the different masses
In a vacuum
27
Which of the following would exert about 1000 Newtons of force?
A baby
A large man
A safety pin
A dump truck
Explanation:
To find the charge gained by the solid when one electron is removed from each of its atoms, you can follow these steps:
1. Calculate the total number of electrons in 1 gram of the solid. Since there are 4 × 10^20 atoms in 1 kg, there are (4 × 10^20 / 1000) atoms in 1 gram.
2. Multiply the number of atoms in 1 gram by the charge gained by removing one electron. Each electron has a charge of approximately -1.6 × 10^-19 coulombs.
3. The total charge gained by the solid in 1 gram is the result of the multiplication from step 2.
Let's calculate it step by step:
Number of atoms in 1 gram = (4 × 10^20 / 1000) = 4 × 10^17 atoms
Charge gained by removing one electron from an atom = -1.6 × 10^-19 C
Total charge gained by the solid in 1 gram = (4 × 10^17) × (-1.6 × 10^-19) C
Now, calculate this expression to find the charge gained by the solid in 1 gram.
The charge gained by a solid when one electron is removed from each atom can be calculated by multiplying the charge of one electron by the number of atoms in the solid.
The question asks for the charge gained by a solid when one electron is removed from each atom of the solid. The charge gained by one atom can be calculated by multiplying the charge of one electron (1.602 × 10-19 C) by the number of atoms in one gram of the solid (4 × 1020 atoms/g). To find the total charge gained by the solid in 1g, we can multiply the charge gained by one atom by the number of atoms in 1g of the solid (1 mole = 6.02 × 1023 atoms).
Charge gained by one atom = 1.602 × 10-19 C
Number of atoms in 1g = 4 × 1020 atoms/g
Total charge gained by 1g of solid = Charge gained by one atom × Number of atoms in 1g
#SPJ11
During collisions between two gas particles, kinetic energy is transferred without any loss.
The motion of gas particles is constant and random.
Answer: Collisions between gas particles are inelastic.
Explanation: Kinetic Molecular Theory explains the basic relation between the temperature and the speed of the gaseous molecule . From this theory itself, ideal gas equation was born.
the incorrect postulates among the given is that the 'Collisions between gas particles are inelastic' because during collision, the gas molecules collide with one another as well as with the walls of the container .
Thus there is no loss of kinetic energy in the collision phenomenon .
It is also correctly given that Gas particles are small and spherical with an insignificant volume and the motion of gas particles is constant and random.
Answer:
B: Discovering the internal structure of the atom.
Explanation:
Dalton’s experiments with gases marked the beginning of the modern era of chemistry. The hypotheses about the nature of matter on which Dalton’s atomic theory is based can be
summarized as follows:
Dalton made no attempt to describe the structure or composition of atom —he had no idea what an atom is really like. But he did realize that the different properties shown by elements such as hydrogen and oxygen can be explained by assuming that hydrogen atoms are not the same as oxygen atoms.
b. a beta particle
c. gamma radiation
d. all of the above
Answer: The radiation that is emitted from the above process is alpha particle.
Explanation:
Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units. The released alpha particle is also known as helium nucleus.
Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron. The released beta particle is also known as electron.
Gamma decay is defined as the process in which an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and thus releases .
These radiations does not carry any charge and are electrically neutral.
The chemical equation for the decay of polonium-212 isotope follows:
Hence, the radiation that is emitted from the above process is alpha particle.
(2) the activation energy of the exothermic reaction
(3) the difference between the potential energy of the products and the potential energy of the reactants
(4) the sum of the potential energy of the products and the potential energy of the reactants
Answer: The correct answer is Option 3.
Explanation:
The net energy absorbed or released in a chemical reaction is known as the total enthalpy change of the reaction. It is written as
The formula used to calculate total enthalpy of the reaction is:
where,
= Potential energy of the products
= Potential energy of the reactants
Hence, the correct answer is Option 3.