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
Ugo [173]
3 years ago
11

What is the density (g / mL) of a substance that has a mass of 8.11 g and, when placed into a graduated cylinder, causes the wat

er level to rise from 25.26 mL to 44.72 mL?
Chemistry
1 answer:
MAXImum [283]3 years ago
8 0

Answer:

<h3>The answer is 0.42 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 8.11 g

volume = final volume of water - initial volume of water

volume = 44.72 - 25.26 = 19.46 mL

We have

density =  \frac{8.11}{19.46}  \\  = 0.416752312...

We have the final answer as

<h3>0.42 g/mL</h3>

Hope this helps you

You might be interested in
Kamal was on a picnic to Hatta with his parents and family friends. While playing, he collected some muddy water from the Wadi i
Anni [7]
Please please lord lord thank you
4 0
2 years ago
10. Translate each of the following chemical equations into a sentence.
Fofino [41]

Answer:

a) 2ZnS(s)+3O_2(g)\rightarrow 2ZnO(s)+2SO_2(g)

2 moles of Zinc sulphide in solid form reacts with 3 moles of Oxygen in gaseous form to give 2 moles of Zinc oxide in solid form and 2 moles of sulphur dioxide in gaseous form.

b)  CaH_2(s)+2H_2O(l)\rightarrow Ca(OH)_2 aq)+2H_2(g)

1 mole of calcium hydride in solid form reacts with 2 moles of liquid water to give 1 mole of calcium hydroxide dissolved in water and 2 moles of hydrogen in gaseous form.

The chemical reactions are written by writing the chemical formula of the reactants on left side of the arrow followed by chemical formula of the products. The number of atoms of each element must be balanced to follow the law of conservation of mass.

8 0
3 years ago
why would it not be necessary to heat the air in the balloon as much if the air outside the balloon is colder?
RUDIKE [14]

Hot-air balloons float because the air caught inside the balloon is heated up by a burner, making it less dense than the air outside. As the burner heats the air, it expands and some of the air escapes; that's what makes it less dense

5 0
2 years ago
Read 2 more answers
A buffer is composed of nh3 and nh4cl. How would this buffer solution control the ph of a solution when a small amount of a stro
Shkiper50 [21]

Answer:

According to Le-chatelier principle, equilibrium will shift towards left to minimize concentration of OH^{-} and keep same equilibrium constant

Explanation:

In this buffer following equilibrium exists -

NH_{3}(aq.)+H_{2}O(l)\rightleftharpoons NH_{4}^{+}(aq.)+OH^{-}(aq.)

So, OH^{-} is involved in the above equilibrium.

When a strong base is added to this buffer, then concentration of OH^{-} increases. Hence, according to Le-chatelier principle, above equilibrium will shift towards left to minimize concentration of OH^{-} and keep same equilibrium constant.

Therefore excess amount of OH^{-} combines with NH_{4}^{+} to produce ammonia and water. So, effect of addition of strong base on pH of buffer gets minimized.

5 0
3 years ago
Which of the following statements describes a difference between a chemical change and a physical change in a substance
siniylev [52]

Explanation:

A physical change is one that alters the physical properties of matter (particularly the form and state).

A chemical change is one in which new kind of matter is formed. It is always accompanied by energy changes (evolution or absorption of energy in form of heat or light or both).

Now, the salient differences between physical and chemical changes;

  1. Physical changes are easily reversible whereas chemical changes are not easily reversible.
  2. Physical changes lead to the production of no new kinds of matter whereas chemical changes leads to the production of new kinds of matter.
  3. Physical changes involves no change in mass whereas chemical changes involves change in mass.
  4. Physical changes require little energy whereas considerable amount of energy is needed for chemical changes.
8 0
3 years ago
Other questions:
  • Which of the following is an example of a homogeneous mixture?
    15·2 answers
  • What can you infer about copper and silver based on their position relative to each other?
    7·1 answer
  • How did Robert Goddard contribute to space exploration?
    11·1 answer
  • Why would the reliability of results collected for an experiment increase when several groups of students conduct the same exper
    9·1 answer
  • The visible spectrum of the Cr(acac)3
    13·1 answer
  • Boiling point of water at 750 mmHg is 99.63⁰C. How much sucrose is to be added to 500 g of water such that it boils at 100⁰C. Kb
    11·1 answer
  • In a biochemical reaction, an enzyme acts as a catalyst, causing the
    7·1 answer
  • If I have 4 moles of gas at a pressure of 7.6 atm and a volume of 19 liters, what is the temperature?
    12·1 answer
  • How many electrons does Co2- have?
    8·2 answers
  • Do you think this one experiment is enough to change the scientific theory regarding the speed of light?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!