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
daser333 [38]
3 years ago
8

The first pesticides relied on natural chemicals, such as those taken from chrysanthemum flowers.

Chemistry
1 answer:
Alina [70]3 years ago
4 0

Truuuuuuuuueeeee

YoureWelcome

You might be interested in
A metal foil has a threshold frequency of 5.45 \times 10^{14} \text{ } \text{Hz}5.45×10 14 Hz. Which of the colors of visible l
nalin [4]

Answer:

Green, Blue, Indigo, Violet

Explanation:

According to Einstein's equation of photoelectric effect, the kinetic energy of emitted photoelectron is the difference between the energy of the incident photon and the work function of the metal. The work function of the metal referee to the minimum energy that must be supplied in order to eject an electron from a metal surface. The energy of the incident photon must exceed the work function of the metal.

When we look at the electromagnetic spectrum, only the selected colours have frequency above the threshold frequency as shown by the image attached below.

7 0
3 years ago
Read 2 more answers
What identifies an ion
bezimeni [28]

Answer:

Identifying whether or not an element is an ion is a very simple process. Identify the charge of the element. ... The number of electrons is equal to the atomic number minus the charge of the atom. Refer to an element with either a positive or negative charge as an ion.

7 0
3 years ago
What do all four of these types of molecules have in common?
nalin [4]
D. They all contain carbon as an important part of their structure.
3 0
3 years ago
Where would you find water on the ph scale?
vladimir2022 [97]

Answer: between 6.5 and 8.5

Explanation:

As shown in my science book it appears in the ph scale

5 0
1 year ago
Which element is most plentiful in Earth's crust?
dem82 [27]

Answer:

Oxygen is the most contain in earth but you asked in a,b,c and d. So I'll choice A. aluminium.

5 0
3 years ago
Other questions:
  • A helium balloon occupies a volume of 1.8 L at 5°C.<br>What volume will it occupy at 85.0°C?​
    11·1 answer
  • Which atom has the smallest atomic radius? Cs K Li Fr
    7·1 answer
  • The volume of a gas is always the same as the volume of __________.
    13·2 answers
  • In the following neutralization reaction, which substance is the acid?
    8·1 answer
  • Please help ASAP PLEASE
    9·1 answer
  • Earthquakes are vibrations of Earth's crust. Which of the following is used to
    15·1 answer
  • What is the correct formula for glucose? A) CO2H2O B) C6H12O6 C) CHO D) CO2 + H2O
    6·1 answer
  • ILL GIVE BRIANLY, FOLLOW , 5 STARS AND HEARTS
    5·1 answer
  • Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displac
    7·1 answer
  • 6. An average Mastiff puppy weighs 2.72 kilograms. How many pounds is an average Mastiff puppy? (1lb = 453.6 g)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!