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
Rashid [163]
2 years ago
8

if one person can clean a house in 5 hours and the second person can clean the same house in 4 hours, how long would will it tak

e to clean the house if they worked together?
Chemistry
1 answer:
Anettt [7]2 years ago
3 0
1/5 + 1/4 =1/x

4x + 5x = 20

9x = 20 

x = 2.22 hours  Answer
You might be interested in
What is the amount of moles in 67 g of C​
Tju [1.3M]

Answer:The molar mass of atoms of an element is given by the standard relative atomic mass of the element multiplied by the molar mass constant, 1 × 10−3 kg/mol = 1 g/mol.

Explanation:

3 0
2 years ago
Vishwanath had some money. he spent 3 upon 4 part of money to buy goods for his birthday,1 upon 5 part of money give to his sist
lord [1]

Answer:

The correct answer is - 800.

Explanation:

Given:

Total amount = ? or assume x

spend in buying birthday item = 3/4 of x

given to sister = 1/5 of x

remaining to mother = 40

solution:

the remaning amount = x- (3x/4+x/5) = 4=

=> x- 19x/20 = 40

=> x = 20*40

=> x = 800

thus, the correct answer is = 800

8 0
2 years ago
Whats the name?!?!?!??!?!?!?!?!?!?!!?!?!?!??!?!?!?!
SIZIF [17.4K]
Hydrogen i suppose is the right one
7 0
2 years ago
To calculate acceleration you must know both the objects velocity and _______________ 1pt
KATRIN_1 [288]

Answer:

i think its speed

Explanation:

8 0
2 years ago
Read 2 more answers
Calculate the empirical formula the compound with the following percent composition: 27.59%C 1.15%H 16.09%N 55.17%O
jeyben [28]

Answer: C2HNO3

Explanation: C = 27.59/12.011 = 2.297

H = 1.15/1.008 = 1.1409

N = 16.09/14.007 = 1.1487

O = 55.17/15.999 = 3.4483

Divide by smallest result:

C = 2

H=1

N=1

O = 3

Empirical formula = C2HNO3

8 0
3 years ago
Other questions:
  • What happens to the individual molecules of a liquid as they gain enough kinetic energy to escape the surface of the liquid?
    14·2 answers
  • Calculate moles of naoh 38.18ml of 0.550M
    6·1 answer
  • A community includes
    15·2 answers
  • i don't need these solved I just need the steps to solve it and. what these problems in chemistry would be called so I can look
    8·1 answer
  • Bromine + calcium iodide  calcium bromide + iodine
    11·2 answers
  • Which chemical equation represents the reaction of an Arrhenius acid and an Arrhenius base?
    11·2 answers
  • Why would you weight less on a high mountain peak than you would at sea level?
    7·1 answer
  • I'll give brianliest if correct .
    5·1 answer
  • Distinguish between the crust and and the lithosphere
    13·1 answer
  • Please help. 1.600x10^8 / 8.000x10^11
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!