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
vfiekz [6]
2 years ago
15

Help ty! I just need help with the third one

Chemistry
2 answers:
Sati [7]2 years ago
8 0

Answer:

for number 3 is D

Explanation:

but i am not 100% sure of that

Alja [10]2 years ago
3 0

Answer:

D

Explanation:

because if a flea is on a dog that is a parisite to host relashionship

You might be interested in
Substance X is a compound containing 632mg of manganese and 368mg of oxygen. Substance X is shown
defon

The empirical formula : MnO₂.

<h3>Further explanation</h3>

Given

632mg of manganese(Mn) = 0.632 g

368mg of oxygen(O) = 0.368 g

M Mn = 55

M O = 16

Required

The empirical formula

Solution

You didn't include the pictures, but the steps for finding the empirical formula are generally the same

  • Find mol(mass : atomic mass)

Mn : 0.632 : 55 = 0.0115

O : 0.368 : 16 =0.023

  • Divide by the smallest mol(Mn=0.0115)

Mn : O =

\tt \dfrac{0.0115}{0.0115}\div \dfrac{0.023}{0.0115}=1\div 2

The empirical formula : MnO₂

8 0
3 years ago
Which mineral leaves a green-black powder when rubbed against an unglazed porcelain plate
solong [7]

<u>Answer:</u>

Pyrite leaves behind a green-black streak when it is rubbed against an unglazed porcelain plate as a part of the streak test process.

<u>Explanation:</u>

Different minerals produce different coloured streaks when rubbed against a white ceramic or porcelain streak plate. This streak test is done to identify the mineral and distinguish the same from other minerals that look similar in colour and texture.

It must be ensured that the test is done on clean and fresh specimens of the mineral and that there must be no contaminants. Pyrite specimens are usually brass-yellow colour but it leaves a green-black streak when the streak test is done.

4 0
3 years ago
What is true of diffusion
Fed [463]

Molecules move from areas of high concentration to areas of low concentration.

7 0
3 years ago
The cells of plant and animals lack nuclei
Masteriza [31]
That is not true 
They both have nuclei or we would not be living now
6 0
3 years ago
What's the definition of soil composition ( 17 points ) !!! I NEED HELP NOW
Maru [420]
Soil composition refers to the nutrients and various other substances present in the soil. These are categorized into four basic categories: water, air, organic matter and minerals.
7 0
3 years ago
Other questions:
  • Will give brainliest .Antarctica is believed to have always been positioned at it's current spot on the Earth.
    9·1 answer
  • What are they h-bond water acceptors in fentanyl, and is it souluable in water? Explain why or why not.
    13·1 answer
  • Calcium and water form calcium hydroxide and hydrogen gas also called what type of reaction
    13·1 answer
  • An atom of oxygen has six valence electrons. In nature, oxygen is a diatomic molecule and is usually found in the form O2. Why w
    6·1 answer
  • How does gravity help to demonstrate a cause-and-effect relationship?
    7·2 answers
  • What does a living organism depend on
    9·1 answer
  • Question 7 of 10
    7·1 answer
  • HELP ME PLEASE!!!
    9·1 answer
  • Which of the following IS NOT an ionic compound?<br> A) C2H5OH<br> B) KCI<br> C) Mg3N2<br> D) MnO2
    6·1 answer
  • Calculate the maximum concentration (in m) of calcium ions (Ca2+ ) in a solution that contains of CO3^2-. The ksp of CaCO3 is?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!