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
vredina [299]
3 years ago
10

What structure do insects have for breathing (A) gills (B) tracheae (C) skin (D) lungs

Chemistry
1 answer:
den301095 [7]3 years ago
7 0
I believe tracheae!!!!
You might be interested in
A chemist performs the following reaction to make sodium nitrate
vagabundo [1.1K]

Answer:

See below

Explanation:

A chemist preforms the following: Neutralizing nitric acid (HNO3) with soda ash (Na2CO3). This reaction will then create sodium nitrate and carbonic acid, which will then decompose into water (H20)

5 0
3 years ago
Read 2 more answers
How is the mantle different from the core?​
Pepsi [2]

Answer:The Earth's mantle is made up of semisolid rocks. ... The core consists of extremely hot metal layers instead of rock. Iron and nickel make up the outer section of the core, while the interior is almost entirely iron. The inner core is almost totally solid and shaped like a ball.

Explanation:

3 0
4 years ago
Compound X has a molar mass of 266.64 g/mol and the following composition: aluminum 20.24% chlorine 79.76% Write the molecular f
N76 [4]

Answer:

Explanation:

Assume we have 100g of this substance. That means we would have 20.24g of Cl and 79.76g of Al. Now we can find how many moles of each we have:

\frac{79.76 \:g}{35.45 \: g/mol} = 2.25 mol of chlorine

\frac{20.24 \: g}{26.98 \: g/mol} = 0.750 mol of Al.

To form a integer ratio, do 2.25/0.75 = 2.99999 ~= 3.

So the ratio is essentially Al : Cl => 1 : 3. To the compound is possibly AlCl_3.

However, it says it has a molar mass of 266.64 g/mol, and since AlCl3 has a molar mass of 133.32, it must be Al_2Cl_6.

Actually this molecule isn't exactly AlCl3 (which is ionic). Al2Cl6 forms a banana bond where Cl acts as a hapto-2 ligand. But that's a bit advanced. All you need to know is X = Al2Cl6

5 0
3 years ago
If
defon

Answer:

If

0.0357

mol

CaCl

2

is dissolved in water to make a

0.420

M

solution, what is the volume of the solution?

4 0
3 years ago
~lever
aleksandr82 [10.1K]
Block and tackle d is the best answer
3 0
3 years ago
Other questions:
  • What are some physical properties of metal
    7·1 answer
  • A 68-gram bar of gold is cut into three equal pieces. How dose the density of each piece compare to the density of the original
    12·1 answer
  • Some soils, like clay, hold water tightly. Other soils, like sand, let the water run through. What property of soils is MOST IMP
    10·1 answer
  • How many grams of sucrose, molecular mass 342.34 g/mol, are dissolved in water to make 500. ml of a 0.462 m solution?
    8·1 answer
  • What is produced by a neutralization reaction between an arrhenius acid and an arrhenius base?
    13·1 answer
  • What would I write in the results, conclusion, and keywords and research components for my 4th grade son's Science Fair Project?
    9·1 answer
  • After attending his cousin's birthday party in his backyard, Michael forgot his balloon outside when he went to bed. Overnight,
    6·1 answer
  • I dont understand and this question hard well for me
    8·2 answers
  • 9. A student wished to prepare ethylene gas by dehydration of ethanol at 140oC using sulfuric acid as the dehydrating agent. A l
    10·1 answer
  • Why is 15 m acetic acid an appropriate solvent in which to perform rate studies of electrophilic bromintations?.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!