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
Drupady [299]
3 years ago
13

What is the advantage of having valves in the

Chemistry
1 answer:
fenix001 [56]3 years ago
6 0
The valves stop the blood from flowing backwards
You might be interested in
What molecules can cells break down for energy?
Orlov [11]

Answer: I think the answer is C)

Explanation:

6 0
3 years ago
In a titration, a few drops of an indicator are added to a flask containing 35.0 milliliters of HNO3(aq) of unknown concentratio
sasho [114]

Answer:

NaOH(aq) + HNO3(aq)------>NaNO3(aq) + H2O(l)

Explanation:

A thing to note is that an acid and a base will react to form a metal salt + H2O.

~Hope it helps:).

5 0
2 years ago
cheryl has $56 and wants to buy as many notebooks as she can to donate to her school. if each notebook costs $1.60, which inequa
postnew [5]
Amount of money that Cheryl has = $56
Cost of each notebook = $1.60
The maximum number of notebooks she can buy = n
Then

n = 56/1.6 

is the inequality that shows the maximum number of notebooks she can buy with her money

On solving the inequality, we get
n = 35 notebooks.
6 0
3 years ago
Read 2 more answers
Three common gaseous compounds of nitrogen and oxygen of different elementary composition are known: (A) laughing gas containing
Ede4ka [16]

Answer:

Please find how these data prove the law of multiple proportions below

Explanation:

The law of multiple proportions was proposed by an English chemist called John Dalton. The law states that when two elements combine and to form more than one compound. The weights/masses of the second element in the two compounds, which combines with a fixed ratio of the first element, is in a simple whole number ratio.

In this question, Nitrogen is said to combine with oxygen to give three different compounds as follows:

A) laughing gas containing 63.65% nitrogen i.e. 0.6365g

This means that the mass of oxygen will be (1-0.6365) = 0.3635g

B) colorless gas containing 46.68% nitrogen i.e. 0.4668g

This means that the mass of oxygen will be 0.5332g

C) brown toxic gas containing 30.45% nitrogen i.e. 0.3045g

This means that the mass of oxygen will be 0.6955g

The ratios of oxygen in the three compounds is therefore:

0.3635: 0.5332: 0.6955

Divide this ratio by the smallest number (0.3635)

0.3635/0.3635 = 1

0.5332/0.3635 = 1.467

0.6955/0.3635 = 1.913

Multiply this ratio by 2, we have:

2: 2.9 : 3.8

Hence, the simple whole number ratio is 2:3:4.

This proves the law of multiple proportions that oxygen is in simple whole number ratio in the three different compounds.

4 0
3 years ago
How many liters are in 5.42 mols of O2 gas?<br><br> (2 decimal places)
Debora [2.8K]

Explanation:

1 mol = 22.4 l

5.42 mol = 22.4 × 5.42 = 121.408

in two decimal place it is 121.41

7 0
3 years ago
Other questions:
  • All of the elements below can exist as network solids EXCEPT 1. As 2. B 3. Si 4. O 5. C
    7·1 answer
  • An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers. Find the pH of the following buf
    9·1 answer
  • If boiling water were poured into a China cup and a foam cup which cup would feel hotter?explain.
    8·2 answers
  • Easy Mole Conversion: <br><br> How many grams are in 2.00 moles of cobalt (I) hydroxide?
    14·1 answer
  • Sobre ações relacionadas ao aquecimento global, assinale somente as alternativas corretas:
    8·1 answer
  • 11. Write down the molecular formula of following compounds by
    15·1 answer
  • What is the final temperature of a mass of 100 g of water at 80°C that is added to 200 g of water at 50°C?
    10·1 answer
  • Is this Ionic, Covalent, or Metallic?
    14·1 answer
  • What is the volume of gas at a temperature of 200.0 K if its original volume was
    14·1 answer
  • How many grams of h2 will be produced from 12 grams of mg?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!