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
Alik [6]
3 years ago
8

What substances pass through a leaf's stomata?

Chemistry
2 answers:
Lera25 [3.4K]3 years ago
7 0
Oxygen and carbon dioxide
mrs_skeptik [129]3 years ago
3 0

Answer:

oxygen water and carbon dioxcide

Explanation:

You might be interested in
How many grams of calcium nitrate are needed to make 3.30 L of a 0.10 M solution?
ki77a [65]
54.15 g
First you start out with the equation n=cv (n= moles, c=molarity, v= volume)
You’re going to multiply 0.10M by 3.30L to get an answer of 0.33 moles of Ca(NO3)2
From there you’re gonna convert the moles to grams to get your answer, first you have to find the molar mass of Ca(NO3)2
This can be done by finding adding the molar mass of each individual substance
The answer you should get for the molar mass is 164.1 g
From there just multiply the number of moles you calculated (0.33 mol) by the molar mass (164.1 g) and your answer is going to be 54.15 g Ca(NO3)2
6 0
3 years ago
2. Assume that a sample of 10.00 g of a solid unknown is dissolved in 25.0 g of water. Assuming that pure water freezes at 0.0 o
Roman55 [17]

Answer:

m = 3 moles/kg

Explanation:

This is a problem of freezing point depression, and the formula or expression to use is the following:

ΔT = i*Kf¨*m (1)

Where:

ΔT: Change of temperature of the solution

i: Van't Hoff factor

m: molality of solution

Kf: molal freezing point depression of water (Kf = 1.86 °C kg/mol)

Now, the value of i is the number of moles of particles obtained when 1 mol of a solute dissolves. In this case, we do not know what kind of solution is, so, we can assume this is a non electrolyte solute, and the value of i = 1.

Let's calculate the value m, which is the molality solving for (1):

m =  ΔT/Kf (2)

Finally, let's calculate ΔT:

ΔT = T2 - T1

ΔT = 0 - (-5.58)

ΔT = 5.58 °C

Now, let's replace in (2):

m = 5.58/1.86

<em>m = 3 moles/kg</em>

<em>This is the molality of solution.</em>

<em>The other data of mass, can be used to calculate the molecular mass of this unknown solid, but it's not asked in the question.</em>

3 0
3 years ago
Based on the parameters set forth in your lab procedure, what is the ph you should observe when you added the hcl to water?.
Rzqust [24]

Acid has a pH below 7 while water has a pH of 7. A strong acid with a pH of roughly 3, HCl is. Water gets more acidic and loses pH in the range of 4-5 when HCl is added to it.

<h3>What is pH?</h3>

A substance's pH is a gauge of how basic or acidic it is. It is a measurement of the amount of H+ present in the solution. It is equivalent to the negative logarithm of the concentration of H+ ions mathematically.

A solution is acidic if its pH value is less than 7, and basic if it is greater than 7. Acids have a lower pH because they contain more H+ ions. Strong acid hydrochloric acid has a pH between 2 and 3.

Water has no charge. Water becomes acidic in pH if any acid is introduced. Therefore, if HCl is given to water, the pH of the water will change to 3-5 depending on the acid content.

To find more on pH refer here:

brainly.com/question/491373

#SPJ4

6 0
10 months ago
Really need help on this thing plz someone... help number 2 and 3:(
olasank [31]

Answer:

I don't have one sorry

Explanation:

it's because I can't see the question I don't know it I'm sorry dude

8 0
2 years ago
the number below and to the right of an element in a chemical formula. It represents the number of atoms of that element in chem
RideAnS [48]
The statement is true, if that was your question
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following represents a hydrocarbon that contains one double bond somewhere in the carbon chain?
    7·1 answer
  • What kind of change is sodium hydroxide dissolving in water
    12·1 answer
  • Calculate the mass in grams 3.00 moles Na
    15·1 answer
  • Which organ gives our body the sense to touch, protects it, and helps keep it at the right temperature?
    8·2 answers
  • What is the difference between refference and indicator electrode​
    10·1 answer
  • Explain chromatography​
    15·1 answer
  • In your own words What is the average atomic mass of an element?
    7·2 answers
  • Provide the correct IUPAC name for Sr(OH)2 - 7H20.
    14·1 answer
  • Please answer this question according to the image below
    15·1 answer
  • Rank the substances involved in this reaction in the order of decreasing potential energy:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!