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
adelina 88 [10]
3 years ago
15

Which of the following is a pure substance?

Chemistry
1 answer:
Mazyrski [523]3 years ago
8 0

Answer:

1. B

2. 100 C

3.  C

4. D

5. D

Explanation:

You might be interested in
If 52500 J of heat is used to heat a 10200g block of metal and
Angelina_Jolie [31]

Answer:

45.95 Jkg^-1°C^-1

Explanation:

as specific heat capacity = heat energy / mass × delta

temperature

=52500/10.2×112

=45.95 Jkg^-1°C^-1

5 0
3 years ago
Can you explain what he did wrong.
vivado [14]
Cant see it well please find better view
7 0
3 years ago
What is the mole fraction of ethanol in a mixture of 0.25 mol of ethanol and 0.4 mol of methanol? Report your answer to the hund
snow_tiger [21]

Answer:

0.3846

Explanation:

i used fractions

6 0
3 years ago
A container is filled with a mixture of gases:
strojnjashka [21]

Answer:

The partial pressure of chlorine gas in the mixture is 1.55 atm.

Explanation:

Partial pressure of oxygen gas = p_1=1.0 atm

Partial pressure of nitrogen gas = p_2=0.75 atm

Partial pressure of chlorine gas = p_3=?

Total pressure of the mixture of gases = P = 3.30 atm

Using Dalton's law of partial pressure:

P=p_1+p_2+p_3

3.30 atm=1.0 atm+ 0.75 atm+p_3

p_3=3.30atm - (1.0 atm+ 0.75 atm)=1.55 atm

The partial pressure of chlorine gas in the mixture is 1.55 atm.

8 0
3 years ago
What’s the anwser ????????????????????
nevsk [136]

The oxidation state of N changes from +2 to 0 while that of C changed from +2 to +4.

<h3>Oxidation and reduction</h3>

Oxidation is defined as an increase in oxidation number of the addition of oxygen while reduction is a decrease in oxidation number or removal of oxygen.

In the reaction shown by the equation, the oxidation number of N in NO changed from +2 to 0 in N_2 while that of C in CO changed from +2 to +4 in CO_2.

Thus, NO is acting as the oxidizing agent while CO is acting is the reducing agent.

More on oxidation and reduction can be found here: brainly.com/question/13699873

#SPJ1

4 0
2 years ago
Read 2 more answers
Other questions:
  • What is the mole fraction of water in 200g of 95 ethanol?
    13·1 answer
  • A solution contains some or all of the ions Cu2+,Al3+, K+,Ca2+, Ba2+,Pb2+, and NH4+. The following tests were performed, in orde
    9·1 answer
  • According to Hund's Rule, if you were filling the three orbitals at the 2p energy level, you would first put an electron in the
    11·1 answer
  • A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compou
    6·2 answers
  • A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 13.06% naphthalene by mass. Calculate
    14·1 answer
  • The C2-C3 single bond in butane freely rotates at room temperature, see equation (1) below. In contrast, the C2-C3 single bond i
    13·1 answer
  • As a seed plant grows, the roots grow downward due to the force of​
    11·1 answer
  • How many types of ions must be present in solution, at minimum, for the phenomenon of selective precipitation to be observed? Yo
    13·1 answer
  • It
    9·1 answer
  • a 2 L balloon at a pressure of 1 atm ascends to where there is a pressure of 0.27 atm. what is the new volume of the balloon?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!