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adelina 88 [10]
3 years ago
12

PLEASE ANSWER THESE QUESTIONS FOR 21 POINTS AND A BRAINLIEST, KEEP IN MIND THESE QUESTIONS ARE VERY IMPORTANT AND WILL DETERMINE

MY GRADE!!!!(NO GUESSING, SPAMMING OR LINKS)
This is energy that is stored for later use.

kinetic energy
potential energy
mechanical energy
electromagnetic energy.

A ball rolling down the hill is an example of ___ energy.
1 point
Kinetic
Potential
Electrical
Sound

Requires two parents
1 point
Sexual reproduction
Asexual Reproduction

Small grains that contain a plant's male reproductive cells.
1 point
stamen
pollen
pistil
stigma

C, D , and E are collectively known as the ______.
1 point
Captionless Image
stamen
anther
sepal
pistil

Small leaf-like structures forming an outer circle at the base of a flower.
1 point
petals
sepal
stigma
pistil

The stalk that supports or holds up the anther is the
1 point
style
filament
ovary
pistil

A flower structure that encloses and protects ovules and seeds as they develop.
1 point
Petal
Ovule
Stigma
Ovary

the part of the ovary of seed plants that contains the female germ cell and after fertilization becomes the seed.
1 point
Ovule
Style
Stamen
.Pistil

Supports the stigma, serves as passageway for pollen
1 point
Anther
Style
Stem
Ovule

Renewable energy resources are?
1 point
A resource that cannot be readily replaced by natural means on a level equal to its use.
Invisible resources
Renewable resources that can be naturally restored.
All the above

Coal and oil are?
1 point
Non-Renewable energy resources
Renewable energy resources
None of the above

Bio-fuel and geothermal energy are examples of?
1 point
Non-renewable energy resources
Hydro energy
Renewable energy resources
None of the above

What is the name of flower part #10 ?
1 point
Captionless Image
sepal
pollen tube
filament
stigma

Which of the following is NOT a Natural Resource?
1 point
Coal
Paper
Solar
Wind

What is the disadvantage of using non-renewable resources?
1 point
They have a large carbon footprint.
They can all be used up over time.
They can lead to global warming.
All of these.
Chemistry
1 answer:
Katena32 [7]3 years ago
6 0
Sexual Reproduction requires two parents.
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The given question is incomplete. The complete question is :

What is the coefficient of H_2O when the following equation is properly balanced with the smallest set of whole numbers? PCl_3(l)+H_2O(l)\rightarrow H_3PO_3(aq)+HCl(aq)

Answer: The coefficient of H_2O is 3

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical reaction is:

PCl_3(l)+3H_2O(l)\rightarrow H_3PO_3(aq)+3HCl(aq)

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Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 2.1 grams of ethane.

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First of all, we need to determine the reaction and the limiting reactant to work with the stoichiometry.

The equation is: 2C₂H₆ + 7O₂ →  4CO₂ + 6H₂O

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