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
Natalka [10]
3 years ago
15

4. In the following, how many digits should be in the solution to have the proper number of sig figs?

Chemistry
1 answer:
yan [13]3 years ago
4 0

Answer:

i guess b maybe the answer

You might be interested in
A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/
lara31 [8.8K]

Answer:

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :

<u>2.67%</u>

Explanation:

Note : Look at the density of potassium nitrate in water if given in the question.

<u><em>You are calculating </em></u><u><em>weight /Volume</em></u><u><em> not weight/weight % or percent by mass of the solute</em></u>

Here the <u>weight/weight % or percent by mass</u> of the solute is asked : So first convert the<u> VOLUME OF SOLUTION into MASS</u>

Density of potassium nitrate in water KNO3 = 2.11 g/mL

density=\frac{mass}{volume}

Density = 2.11 g/mL

Volume of solution = 86.4 mL

2.11=\frac{mass}{86.4}

mass = 2.11\times 86.4

mass=182.3grams

Mass of Solute = 4.87 g

Mass of Solution = 183.2 g

w/w% of the solute =

= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100

=\frac{4.87}{183.2}\times 100

w/w%=2.67%

8 0
3 years ago
How much water (H2O ) would form if 4.04 g of hydrogen (H2) reacted with 31.98 g of oxygen (O2 )?
Norma-Jean [14]

Answer:

Mass = 36 g

Explanation:

Given data:

Mass of water formed = ?

Mass of hydrogen = 4.04 g

Mass of oxygen = 31.98 g

Solution:

Chemical equation:

2H₂ + O₂   →   2H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4.04 g/ 2 g/mol

Number of moles = 2.02 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 31.98 g/ 32 g/mol

Number of moles = 1.0 mol

Now we will compare the moles of water with hydrogen and oxygen.

                O₂         :         H₂O

                 1           :           2

                H₂         :         H₂O

                 2          :          2

               2.02       :      2.02

Number of moles of water formed by oxygen are less thus oxygen will limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 2 mol × 18 g/mol

Mass = 36 g

8 0
2 years ago
What is true of all body except sex cells
Evgesh-ka [11]
They can all by seperrated or replicated.

4 0
3 years ago
3. Which of the following are missing from the food web shown below?
Vera_Pavlovna [14]
I assume that it is herring
5 0
3 years ago
ANSWER ASAP PLEASE
gayaneshka [121]

Answer:

Explanation:

1-False

2-true

3-false

4-false

5-true

what is this..a murder scene?? Lolol

8 0
2 years ago
Other questions:
  • How many moles of C2H2 are needed to react completely with 84.0 mol O2?
    8·2 answers
  • What does the nucleus of a cell do
    7·2 answers
  • How many atoms does CaF2 have​
    7·1 answer
  • 1 scientific law and 1 scientific theory ?
    7·1 answer
  • What is the theoretical yield of Li3N in grams when 12.8 g of Li is heated with 34.9 g of N2?
    8·1 answer
  • Can anybody help me? What is Oxidation? I used google but it didn't give me a good answer...
    6·1 answer
  • I need to know what the summary of matter is helpppppp!!!!
    12·1 answer
  • what type of element can turn into both solid and liquid form depending on the temperature of its surroundings ?​
    6·2 answers
  • Help please i would really appreciate it thanks
    10·2 answers
  • Why is methanol written as ch3oh instead of ch4o?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!