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
Naya [18.7K]
2 years ago
7

20 Which of these statements about plants are true?

Chemistry
1 answer:
solong [7]2 years ago
6 0

Answer:

C) 2 and 4 only

Explanation:

plants are the producers in a food chain

plants use sunlight for photosynthesis

You might be interested in
How does increasing temperature affects reaction rate?
valkas [14]
Answer: It increases the reaction rate.

Step-by-step explanation:

The particles gain kinetic energy.
4 0
2 years ago
How many bromine atoms are present in 39.0 g of ch2br2?
Mandarinka [93]
Answer is: there is  2,69·10²³ atoms of bromine.
m(CH₂Br₂) = 39,0 g.
n(CH₂Br₂) = m(CH₂Br₂) ÷ M(CH₂Br₂).
n(CH₂Br₂) = 39 g ÷ 173,83 g/mol.
n(CH₂Br₂) = 0,224 mol.
In one molecule of CH₂Br₂, there is two bromine atoms, so:
n(CH₂Br₂) : n(Br) = 1 : 2.
n(Br) = 0,448 mol.
N(Br) = n(Br) · Na.
N(Br) = 0,448 mol · 6,022·10²³ 1/mol.
n(Br) = 2,69·10²³.
7 0
3 years ago
Calculate the density of the items below. (D = M/V)<br> 1) M = 15g V = 5.0ml *
grin007 [14]

Answer:

<h3>The answer is 3.0 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 15 g

volume = 5 mL

We have

density =  \frac{15}{5}  \\

We have the final answer as

<h3>3.0 g/mL</h3>

Hope this helps you

5 0
2 years ago
The diagram shows the electron arrangement in a molecule of ammonia, showing only outer
rusak2 [61]

Answer:

Since this is old, im just gonna get these points, don't wan't them to go to waste lm.ao

Explanation:

3 0
3 years ago
A. what is the hybridization of the central atom in cse2?
elixir [45]

The orbital hybridization of the central carbon atom in CSe2 is sp.

In chemical bonding, atomic orbitals may be combined to form appropriate hybrid orbitals suitable for bonding. The orbitals that combine during hybridization must be close enough in energy.

In the compound Cse2, carbon is the central atom bonded to two selenium atoms. The carbon atom in CSe2 is sp hybridized.

Learn more about orbital hybridization:  brainly.com/question/1869903

4 0
2 years ago
Other questions:
  • Which electromagnetic wave has wavelengths ranging from the size of a printed period to the length of a pen (1×10-3 to 1×10-1 me
    9·1 answer
  • What are 3 things that microwaves do
    12·1 answer
  • Calculate the pH of each solution at 25∘C
    8·1 answer
  • Explain why baking soda, nahco3, is commonly used as an emergency safety remedy for lab spills that are acids or bases. support
    10·2 answers
  • What is the speed of an electromagnetic wave with a frequency of 1.33x10^17Hz and a wavelength of 2.25nm?
    12·2 answers
  • Based on what you know about the relative temperatures of Earth’s geological layers, what can be said about the crust, mantle, a
    7·1 answer
  • Explain why it is necessary for a chemical reaction to balance.
    12·2 answers
  • Whats is tge electron configuration of Ag2+ please answer asap..
    11·1 answer
  • In the Bohr model of the atom, the electrons move in fixed, ________ paths around a dense, positively-charged nucleus. On the ot
    13·1 answer
  • What is the molar mass of CH20?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!