1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ludmilkaskok [199]
3 years ago
15

The diagram shows the life cycle of a pine tree.

Chemistry
2 answers:
Brrunno [24]3 years ago
7 0

Answer: D- A seed that contains an embryo plant grows into a young pine tree.

Explanation: The embryo plant comes from a pinecone seed so it can grow into a new plant.

hodyreva [135]3 years ago
6 0

Answer: d

Explanation: a p e x

You might be interested in
Describe the main difference between the Bohr model of the atom and the Rutherford model
ycow [4]
Bohr suggested, that there are definitive shells of particular energy and angular momentum in which an electron can revolve. It was not in Rutherford's model
8 0
3 years ago
Read 2 more answers
Balance the following chemical equation <br> __Mg+__O2–&gt;__MgO
mario62 [17]

Answer:

2Mg^+ +O2 right arrow 2MgO

Explanation:

6 0
3 years ago
Read 2 more answers
The number of neutrons in an atom can be found by subtracting the atomic number from the what?
Svetradugi [14.3K]

Answer:

This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.

Explanation:

3 0
3 years ago
Read 2 more answers
If you weighed out 0.38 g of calcium and reacted it with an excess of hcl, how many moles of h2(g) would you expect to produce?
Hitman42 [59]
Answer is: 0,0095 mol of hydrogen gas will be produced in reaction.
Chemical reaction: Ca + 2HCl → CaCl₂ + H₂.
m(Ca) = 0,38 g.
n(H₂) = ?
n(Ca) = m(Ca) ÷ M(Ca).
n(Ca) = 0,38 g ÷ 40 g/mol
n(Ca) = 0,0095 mol.
from reaction: n(Ca) : n(H₂) = 1 : 1.
n(H₂) = n(Ca) = 0,0095 mol.
n - amount of substance.
4 0
3 years ago
Why do atoms gain or lose electrons?
Aleksandr [31]

Answer:kapil

Explanation:

Atoms lose electrons, if an electron gets more energy than then binding energy of the electron. This may be because of a collision with a charged particle or because of absorbtion of a photon. In a metal, there are just other positive charges nearby. The electron is not lost, but shared.

6 0
3 years ago
Other questions:
  • Calculate the mass of dry ice that should be added to the water so that the dry ice completely sublimes away when the water reac
    15·1 answer
  • An object with a height of 0.3 meter is placed at a distance of 0.4 meter from a concave spherical mirror. An image with a heigh
    6·2 answers
  • What quantity, in moles, of oxygen is consumed when 717.4 kJ of energy is evolved from the combustion of a mixture of H2(g) and
    10·1 answer
  • If 1.0g of each of the following gases is stored at STP, which one would occupy the greatest volume? CH4, CO, H2O, NO, or will t
    8·1 answer
  • Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.295 gram piece of metal and c
    15·1 answer
  • Acid indigestion is sometimes neutralized with an antacid such as magnesium hydroxide (Mg(OH)2). What products will be released
    12·1 answer
  • your friend wants to fly a kite over the water on the beach. which time would you go time a time c or time f
    10·1 answer
  • Consider the reaction of 35.0 g of iron as follows:
    8·1 answer
  • Which of the following biogeochemical cycles does not contain a molecule in a gaseous state?
    10·1 answer
  • Why did all sodium compounds show the same colour in the flame?<br> (flame test)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!