Negative phototropism in plants refers to the growth response of plant parts away from a light source. The part of a plant most likely to show negative phototropism is the roots.
Negative phototropism in plants refers to the growth response of plant parts away from a light source. This means that the plant part will grow in a direction where it receives less light.
Roots typically exhibit negative phototropism because they grow away from light sources. This behavior is advantageous for roots because they need to grow deeper into the soil to seek water, nutrients, and stability. By growing away from light, roots are guided towards a more favorable environment for their functions. In contrast, other parts of the plant, such as stems and leaves, often exhibit positive phototropism, where they grow towards light to optimize photosynthesis and energy production.
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The root of a plant is the part that is most likely to show negative phototropism.
The part of a plant that is most likely to show negative phototropism is the root.
Phototropism is the growth response of a plant to light, and negative phototropism means the plant grows away from the light.
The root grows downwards into the soil, away from the light, in order to anchor the plant and absorb water and nutrients.
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B) -11
C) 0
D) 23
Answer:
Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
Explanation:
Answer: 2Na + 2H₂O → 2NaOH + H₂
According to the equation, 2 moles of Na react with 2 moles of H₂O to produce 1 mole of H₂ gas.
To calculate the number of moles of Na in 120 g, we need to know the molar mass of Na, which is 22.99 g/mol. We can set up a conversion factor:
120 g Na * (1 mol Na / 22.99 g Na) = 5.22 mol Na
Since the reaction ratio is 2 moles of Na to 1 mole of H₂, we can set up another conversion factor:
5.22 mol Na * (1 mol H₂ / 2 mol Na) = 2.61 mol H₂
Now, to convert moles of H₂ to grams of H₂, we need to know the molar mass of H₂, which is 2.02 g/mol. Again, we set up a conversion factor:
2.61 mol H₂ * (2.02 g H₂ / 1 mol H₂) = 5.27 g H₂
Therefore, when 120 g of Na reacts with water, approximately 5.27 grams of hydrogen gas will be produced.
Note: Remember to round your final answer to an appropriate number of significant figures based on the given data.
Explanation:
To find the grams of hydrogen produced, we need to calculate the moles of Na, determine the moles of H2O using the mole ratio, and convert the moles of H2 to grams.
To determine how many grams of hydrogen are produced when 120 g of Na is available, we first need to calculate the moles of Na using its molar mass. Then, we use the balanced chemical equation to determine the mole ratio between Na and H₂O. Finally, we convert the moles of H₂ to grams. Here are the steps:
1. Calculate the moles of Na:
moles of Na = (mass of Na) / (molar mass of Na)
2. Determine the moles of H₂O using the mole ratio:
moles of H₂O = (moles of Na) x (moles of H₂O / moles of Na)
3. Convert the moles of H₂ to grams:
grams of H₂ = (moles of H₂) x (molar mass of H₂)
Using these steps and the given values, we can calculate the grams of hydrogen produced from 120 g of Na.
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Answer:
The correct answer is protons.
Explanation:
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All atoms of the same element have the same number of protons. The isotopes of an element are chemical species that change the number of neutrons but not that of protons.
Then the different atoms of the same element differ in their protons.
The correct answer is protons.
All atoms of the same element have the same number of protons.
Protons are subatomic particles that are found within the nucleus of an atom. They have a positive electrical charge, which is equal in magnitude but opposite in sign to the negative charge of electrons. Protons are one of the three main types of particles found in atoms, along with neutrons and electrons.
The number of protons in an atom determines its atomic number and defines the element. For example, an atom with one proton is hydrogen (H), while an atom with six protons is carbon (C).
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Since the Mg is in excess, therefore HCl will be fully consumed in the reaction.
The first step is to find the amount of HCl in mol
Let N (HCl) = amount of HCl in mol
N (HCl) = (6 mol HCL/L solution) *( 125 mL ) * (1 L/1000 mL) = 0.75 mol of HCl
Through stoichiometry
N (H2) = 0.75 mol HCl * (1 mol H2/ 2 mol of HCl)
N(H2) = 0.375 mol H2
Since we are asked for the number of grams of H2 (mass), we multiply this with the molar mass of hydrogen
M (H2) = 0.375 mol H2 ( 2 g H2 / 1 mol H2)
M (H2) = 0.75 g H2
sand
oxygen
gold
carbon dioxide
helium
carbon
rust
seawater
1. Name the two metals
2.Name a gas that is not an element
3.Name a mixture
4.Name a non metallic element that is a solid .
Answer:
1. gold and rust
2. carbon dioxide
3. sea water
4. carbon
Answer:
1. Gold and Iron
2. Helium
3. Seawater
4.Rust
Explanation: