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
gtnhenbr [62]
3 years ago
13

You measure water in two containers: a 10-ml graduated cylinder with marks at every ml, and a 1- ml pipet marked at every 0.1 ml

. if you have some water in each of the containers and add them together, to what decimal place could you report the total volume of water?
Chemistry
1 answer:
tangare [24]3 years ago
8 0

One decimal place.

The reading in graduated cylinder is marked after every 1 mL and that of pipette at every 0.1 mL. If same amount of water is taken from both the containers. The sum of volume of water will take the minimum decimal places. Precise value of volume is calculated using pipette as it has markup after every 0.1 mL, the lowest decimal place will be 1 decimal place (0.1).



You might be interested in
If you were to conduct an experiment to answer the question, "Does the volume of a caffeinated drink affect your reaction time?”
Ann [662]

Answer:

A Type of Drink

Explanation:

A controlled variable remains constant throughout the experiment.

In such experiment, you'd test the volume of one single caffeinated drink. You'd have to use the same type of drink every trial.

4 0
2 years ago
I’m not sure what the answer is
Sergio [31]
I believe it’s the third option
Chemically combined to make a new pure substance
7 0
3 years ago
Read 2 more answers
Calculate the ph of a 0.20 m solution of kcn at 25.0 ∘c. express the ph numerically using two decimal places
storchak [24]
The pH of the solution is basically the negative logarithm of the concentration of hydrogen ions or H+. In equation form, pH = -log[H+]. It could also be in terms of the concentration of hydroxide ions or OH- as pOH, where pOH = -log[OH-]. The sum of pH and pOH is 14. These are the important equations to know when it comes to equilibrium pH problems.

KCN is a basic salt coming from the reaction of a weak acid, HCN, and a strong base, KOH. In the hydrolysis of KCN, only the strong conjugate base (SCB) is involved. Since HCN is the weak acid, the SCB is CN-. The reaction would be

CN- + H2O ⇔ HCN + OH-

The important data is the equilibrium constant of acidity of the weak acid. Ka for HCN is 6.2×10^-10. Then, let's do the ICE(Initial-Change-Equilibrium) analysis.

          CN-    +    H2O    ⇔    HCN +    OH-

I      0.2 m             ∞                   0             0
C      -x                 ∞                   +x        +x
-----------------------------------------------------------
E      0.2-x                               +x         +x

The value x denotes the number of moles CN- reacted. There is no value for H2O because the solution is dilute such that H2O>>>CN-. Then, we apply the ratio:

K_{H} = \frac{ K_{W} }{ K_{A} } = \frac{[HCN][OH-]}{[CN-]}

where K,H is the equilibrium constant of hydrolysis and Kw is equilibrium constant for water solvation which is equal to 1×10^-14. Therefore,

K_{H} = \frac{ 1x10^-14}{ 6.2x10^-10 } = \frac{[X][X]}{[0.2-X]}

x = 0.001788 m
Since the value of OH- is also x, then OH-=0.001788 m. Consequently,

pOH = -log(0.001788) = 2.75
pH = 14 - pOH = 14 - 2.75
pH = 11.25

4 0
3 years ago
Read 2 more answers
What is the volume of 33.25g of butane gas at 293 C and 10.934 kPa?
PSYCHO15rus [73]

Answer:

V = 240.79 L

Explanation:

Given data:

Volume of butane = ?

Temperature = 293°C

Pressure = 10.934 Kpa

Mass of butane = 33.25 g

Solution:

Number of moles of butane:

Number of moles = mass/ molar mass

Number of moles = 33.25 g/ 58.12 g/mol

Number of mole s= 0.57 mol

Now we will convert the temperature and pressure units.

293 +273 = 566 K

Pressure = 10.934/101 = 0.11 atm

Volume of butane:

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

V = nRT/P

V = 0.57 mol × 0.0821 atm.L/ mol.K  ×566 K  / 0.11 atm

V = 26.49 L/0.11

V = 240.79 L

6 0
3 years ago
How to find the Ka of an acid?
bonufazy [111]
We know that acids have a pH of under 7. 

We also need to:
Set up an ICE table for the chemical reaction.  Solve for the concentration of H3O+ using the equation for pH  Use the concentration of H3O+ to solve for the concentrations of the other products and reactants.
7 0
3 years ago
Other questions:
  • Please help with these two chemistry questions. Image attached.
    11·1 answer
  • The solubility of BaCO3(s) in water at a certain temperature is 4.4 10–5 mol/L. Calculate the value of Ksp for BaCO3(s) at this
    13·1 answer
  • How many grams of silver chloride can be prepared by the reaction of 105.0 ml of 0.22 m silver nitrate with 105.0 ml of 0.13 m c
    9·1 answer
  • What changes occur at the molecular level when ice cream melts and forms a liquid?
    13·2 answers
  • TUL
    13·1 answer
  • CAN SOMEONE HELP ME PLEASE . i have the definitions i just need help with examples
    12·1 answer
  • THIS IS ON MY UNIT 3 STUDY GUIDE!!!!!!!!!<br><br> What is a covalent compound? Write an example.
    13·1 answer
  • Ii) During burning, elements in the coal are<br> converted to compounds called ????
    15·1 answer
  • #
    8·1 answer
  • Please help with this question!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!