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
Andrej [43]
3 years ago
13

Which of these can be classified as a pure substance? Help please

Chemistry
2 answers:
saw5 [17]3 years ago
4 0

Answer: The answer is salt

nikdorinn [45]3 years ago
4 0
The pure substance is salt.
You might be interested in
A 25 gram(m) metal ball is heated to 200C(delta T) with 2330 Joules(q) of energy. What is the specific heat of the metal?
Dominik [7]

Answer:

The specific heat of the metal is 0.466 \frac{J}{g*C}

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

The equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case:

  • Q= 2330 J
  • c= ?
  • m= 25 g
  • ΔT= 200 °C

Replacing:

2330 J= c*25 g* 200 °C

Solving:

c=\frac{2330 J}{25 g* 200 C}

c=0.466 \frac{J}{g*C}

<u><em>The specific heat of the metal is 0.466 </em></u>\frac{J}{g*C}<u><em></em></u>

6 0
3 years ago
Read 2 more answers
In which region is the substance in both the solid phase and the liquid phase ?
Furkat [3]
In which region is the substance in both the solid phase and the liquid phase ?
2
3 0
3 years ago
Read 2 more answers
If 50.0 g of water saturated with potassium chloride at 80.0°C is slowly evaporator to dryness, how many grams of the dry salt w
balu736 [363]

Answer:

25.0 g.

Explanation:

  • From the solubility curve that is shown in the attached image, the solubility of KCl per 100.0 g of water is about 50.0 g.
  • <em>So, a saturated solution of KCl in 50.0 g of water will contain about 25.0 g.</em>
  • <em>Thus, the grams of the dry salt that will be recovered is 25.0 g.</em>

5 0
3 years ago
Why does surface area of a reactant influence the rate of the reaction?
telo118 [61]

because it can influence how frequently and sufficiently the particles collide depending on the space it has to do so, for example a large surface area would be have a slower rate of reaction and a lower temperature. (the rate of reaction in terms of concentration, it is diffused from high to low) 
7 0
3 years ago
A compound whose water solution conducts electricity and turns phenolphthalein pink is
Ede4ka [16]

Answer:

The compound is an <em>alkali</em>

Explanation:

Although acids and bases in solution can conduct electricity due to the presence of free ions available to carry charges, bases or alkalis turn phenolphthalein indicator pink; as opposed to acids which give colourless test on the indicator.

The anayte compound is therefore a concentrated alakli solution.

4 0
3 years ago
Other questions:
  • How many electrons are there in the following compound?
    10·1 answer
  • Chlorine + potassium bromide <br> What is the equation for this??
    14·1 answer
  • Think about a neutral magnesium atom.Then think of a magnesium ion with a 2+charge.How are they different?
    8·1 answer
  • A ___ is the part of the solution that usually stats as a solid and dissolves in solvent ?
    12·1 answer
  • To save time you can approximate the initial volume of water to ±1 mL and the initial mass of the solid to ±1 g. For example, if
    9·2 answers
  • Strong acids are assumed 100% dissociated in water. True As a solution becomes more basic, the pOH of the solution increases. Fa
    8·1 answer
  • A certain alcohol contains only three elements, carbon, hydrogen, and oxygen. Combustion of a 60.00 gram sample of the alcohol p
    8·1 answer
  • What is polar and unpolar bonds?
    12·1 answer
  • chemist must prepare of hydrochloric acid solution with a pH of at . He will do this in three steps: Fill a volumetric flask abo
    6·1 answer
  • How many grams of CO would be required to generate 635 g CO2
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!