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
solmaris [256]
3 years ago
7

Standard 6 multiple choice questions English paper​

Chemistry
2 answers:
Charra [1.4K]3 years ago
5 0
So what’s the question? I’m confused
nikdorinn [45]3 years ago
5 0

Answer:

please attach the images in the attachment and then I 'll b able to answer your questions regarding any subject!!

You might be interested in
3. According to Newton's First Law of Motion, what does an object at rest do?
Taya2010 [7]

Answer:

stays at rest

Explanation:

7 0
3 years ago
What acids in alcohol make it evaporate
fgiga [73]

The acids found in alcohol that make it evaporate are called organic acids.

An organic acid is an organic compound that has acidic properties. There are two types: one has a carboxyl (COOH) group, and the other type has a phenol group.

The most common organic acids are those with a carboxyl group and include acetic acid, formic acid, lactic acid and all fatty acids.  Perfumes  include organic acid in their composition to make them volatile. Volatile substances evaporate easily, and this is important for perfumes. They need to dissipate easily into the surrounding environment and spread their good smell. 




6 0
3 years ago
A sample of gas in a 14.6 L flexible container is at 25.0oC and 1.00atm. What is the volume of the sample when heated to 220.0oC
inn [45]

Answer: 24.1 L

Explanation:

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where,

V_1\text{ and }T_1 are the initial volume and temperature of the gas.

V_2\text{ and }T_2 are the final volume and temperature of the gas.

We are given:

V_1=14.6L\\T_1=25.0^oC=(25+273)K=298K\\V_2=?\\T_2=220.0^0C=(220+273)K=493K

Putting values in above equation, we get:

\frac{14.6}{298K}=\frac{V_2}{493}\\\\V_2=24.1L

Thus the volume of the sample when heated to 220.0oC and the pressure is constant is 24.1 L

7 0
3 years ago
In the following reaction, which substance is the precipitate? (NH4)2SO4(aq) + Ba(NO3)2(aq) BaSO4(s) + 2NH4NO3(aq
mariarad [96]
Assuming that the reactants are:

(NH4)2SO4 (aq) + Ba(NO3)2 (aq)

and the products are:

BaSO4 (s) + 2NH4NO3 (aq),

then you will have to determine which product is insoluble. You should have access to solubility rules to help you determine this.

According to the solubility rules, the following elements are considered insoluble when paired with SO4:

Sr^2+, Ba^2+, Pb^2+, Ag^2+, and Ca^2+

Therefore, the precipitate will be BaSO4 (s).

5 0
3 years ago
Read 2 more answers
How do you boil water less than 100​
natita [175]

Answer: When pressure cooker is used steam is trapped in the pot and it increases the pressure above the water. this causes the water to boil at a temperature more than 100 C. when you pull back on the plunger, the pressure in the syringe is reduced and the liquid boils at a lower temperature

4 0
3 years ago
Other questions:
  • What may be expected when K > 1.0?
    7·2 answers
  • Determine the vapor pressure of a solution at 55 °C that contains 34.2 g NaCl in 375 g of water. The vapor pressure of pure wate
    5·1 answer
  • Do pure substances have the same chemical and physical properties
    15·1 answer
  • During an exothermic reaction, ΔH for the reactants was 890 kJ/mol. Which of the following statements is correct about the ΔH fo
    6·2 answers
  • Use the reactions below and their equilibrium constants to predict the equilibrium constant for the reaction 2A(s)⇌3D(g). A(s) ⇌
    11·1 answer
  • 6th grade science please help me (:
    10·1 answer
  • In the Energy and Specific Heat lab, what temperature should be recorded as the final temperature of the water when measuring th
    15·1 answer
  • Classify the changes involved in the following processes as physical or chemical changes:
    8·1 answer
  • Can someone please help. I have no idea how to do this
    15·1 answer
  • What temperature is absolute zero?<br> OA. 0°C<br> OB. OK<br> O<br> C. 0°F<br> D. O molecules
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!