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
Ray Of Light [21]
3 years ago
6

There are 15 technicians and 11 chemists working in a research laboratory. In how many ways could they form a 5-member safety co

mmittee if the committee a) may be chosen in any way? b) must have exactly one technician? c) must have exactly one chemist? d) must have exactly two chemists? e) may be all technicians or all chemists?
Chemistry
1 answer:
Fynjy0 [20]3 years ago
5 0

a)

26C5 -> 26 choices of 5 things

b)

15C1 × 11C4

c)

11C1 × 15C4

d)

11C2 × 15C2

e)

11C4

or

15C4

You might be interested in
How many liters of a 6.0M solution Fe(SCN)2 are needed to prepare 2.0L of a 0.75M solution?
lubasha [3.4K]

Answer:

0.25L

Explanation:

Using the dilution formula

C1V1=C2V2

C1=6M

V1?

C2=0.75M

V2=2.0L

V1= C2V2/C1

V1=0.75*2.0/6

V1=0.25L

4 0
3 years ago
Read 2 more answers
In the word equation, sodium oxide water sodium hydroxide, the formula for sodium hydroxide is represented by
d1i1m1o1n [39]
Answer:
            <span>Formula for sodium hydroxide is represented by <u>NaOH</u>.

Explanation:
                     The reaction of Sodium oxide with water is as follow,

                               Na</span>₂O  +  H₂O    →    2 NaOH
<span>
Na</span>₂O is considered as a strong basic oxide as it contains O²⁻ which has high tendency to bind with hydrogen atoms. This reaction is an exothermic reaction and is conducted in cold water to produce NaOH.<span>

</span>
4 0
3 years ago
A balloon contains 0.140 molmol of gas and has a volume of 2.78 LL . If an additional 0.152 molmol of gas is added to the balloo
levacccp [35]

Answer:

The final volume will be 5.80 L

Explanation:

Step 1: Data given

Number of moles gas = 0.140 moles

Volume of gas = 2.78 L

Number of moles added = 0.152 moles

Step 2: Calculate the final volume

V1/n1 = V2/n2

⇒ with V1 = the initial volume = 2.78 L

⇒ with n1 = the initial number of moles = 0.140 moles

⇒ with  V2 = The new volume = TO BE DETERMINED

⇒ with n2 = the new number of moles = 0.140 + 0.152 = 0.292 moles

2.78/0.140 = V2 /0.292

V2 = 5.80 L

The final volume will be 5.80 L

8 0
3 years ago
What is the oxidation number for each atom in NH4CI?
Alika [10]
<span>N = +3, H = +1 ,Cl = -1
</span><span>

</span>
5 0
3 years ago
7
Umnica [9.8K]
Answer: Volume im pretty sure
3 0
3 years ago
Read 2 more answers
Other questions:
  • Given that Kw for water is 2.4×10−14 M2 at 37 °C, calculate the pH of a neutral aqueous solution at 37 °C, which is the normal h
    10·1 answer
  • A solution of water (kb=0.512 ∘c/m) and glucose boils at 103.56 ∘c. what is the molal concentration of glucose in this solution?
    10·2 answers
  • Evaluate the lack of cuticle in moss plants.
    7·1 answer
  • A _ reaction occurs when a substance usually containing carbon reacts with oxygen to produce energy in the form of light and hea
    12·1 answer
  • An atom with an atomic number of 12 and a mass number of 25 can best be described by which of these?
    13·1 answer
  • Name 5 affects of weathering and erosion
    13·1 answer
  • Answer question number 7
    6·2 answers
  • (b) on the graph above, carefully draw three curves, one for each of the three gases, starting from the initial point you drew i
    14·1 answer
  • As you move upward, from level, in an energy pyramid, available energy ____.
    13·1 answer
  • Which property could allow a student to easily separate sand and iron filings?(1 point)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!