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
Sedbober [7]
3 years ago
9

E. Which of the following is a mixture? i. Water ii. Hydrogen iii. Air iv. Iron​

Chemistry
2 answers:
Ksivusya [100]3 years ago
8 0

Answer:

iv. Iron

<em><u>water is not a mixture</u></em>

<em><u>hydrogen is the simplest element</u></em>

<em><u>air is pure</u></em>

damaskus [11]3 years ago
6 0

water is known as the mixture

You might be interested in
You have 723 ml of 3.99 M HCl. Using a volumetric pipet, you take 326 ml of that solution and dilute it to 976 ml in a volumetri
MakcuM [25]

Answer:

1.12M

Explanation:

The initial concentration of the HCl solution is 3.99M. You are doing 2 dilutions:

In the first you take 326mL and dilute the solution to 976mL; that means you are diluting the solution:

976mL / 326mL = 2.99 times.

The concentration of this solution is:

3.99M / 2.99 = 1.33M

Now, in the second dilution, you take 100mL of the diluted solution and dilute it to 119mL. The concentration of this final solution is:

119mL / 100mL = 1.19 times.

1.33M / 1.19 =

<h3>1.12M</h3>
6 0
3 years ago
The scientific method is the way scientists solve problems. Scientists begin to solve a problem by making _____.
swat32

Answer:

Explanation: observations

5 0
3 years ago
The nucleoside adenosine exists in a protonated form with a pKa of 3.8. The percentage of the protonated form at pH 4.8 is close
Natasha_Volkova [10]

Answer:

Ok:

Explanation:

So, you can use the Henderson-Hasselbalch equation for this:

pH = pKa + log(A^-/HA) where A- is the conjugate base of the acid. In other words, A- is the deprotonated form and HA is the protonated.

We can solve that

1 = log(A^-/HA\\) and so 10 = A^-/HA or 10HA = A-.  For every 1 protonated form of adenosine (HA), there are 10 A-. So, the percent in the protonated form will be 1(1+10) or 1/11 which is close to 9 percent.

6 0
3 years ago
The atomic mass is the sum of the number of ________ and ________ in the nucleus of an atom. Choose two answers from the options
iVinArrow [24]

Answer :

The atomic mass is the sum of the number of protons and neutrons in the nucleus of an atom.

Explanation :

Atomic number : it is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Mass number or atomic mass : It is defined as the sum of the number of protons and the number of neutrons.

Mass number or atomic mass = Number of protons + Number of neutrons

For example :

Number of protons in carbon = 6

Number of neutrons in carbon = 6

Mass number or atomic mass = Number of protons + Number of neutrons

Mass number or atomic mass = 6 + 6

Mass number or atomic mass = 12

Thus, the atomic mass is the sum of the number of protons and neutrons in the nucleus of an atom.

3 0
3 years ago
Read 2 more answers
What can create sediment
bearhunter [10]
Sediment is created by wind and water.

4 0
3 years ago
Read 2 more answers
Other questions:
  • How many grams of chromium (Cr) are present in 4.20 moles of the metal?
    8·1 answer
  • Use Lewis theory to draw the structure of the compound containing 1 carbon and 4 chlorine atoms. What would you find surrounding
    14·1 answer
  • Water moves to the top of tall trees because of
    8·1 answer
  • What is the total number of nitrogen atoms in 0.25 mole of no2 gas?
    14·2 answers
  • Americium-241 is a radioactive substance used in smoke detectors. The half life of americium is 432 years. If a smoke detector i
    7·1 answer
  • When can Eric Wu take pictures of the three Moon<br> features?
    13·2 answers
  • A cup of coffee is made in the morning by pouring water ov er ground up coffee beans in a piece of paper and by collecting the b
    15·1 answer
  • Freshwater leeches attach to fish and suck blood from the fish for extended periods of time. This results in sores on the fish t
    15·2 answers
  • Your family as an old apple tree in your backyard Your mom loves using the tree's apples to make pies. You don't care for apples
    14·2 answers
  • Why does a floating leaf indicate photosynthesis has occurred
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!