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
trapecia [35]
2 years ago
6

Martha ran 420 m, and Cole ran 60 m less than Martha. The distance Kate ran is right in the middle of Martha and Cole's distance

s. How far did Kate run?
Chemistry
1 answer:
prohojiy [21]2 years ago
8 0

Answer:

390 m

Explanation:

Martha ran 420 m

Cole ran 60 m less than Martha = 420 m - 60 m = 360 m

The distance Kate ran is right in the middle of Martha and Cole's distances

Kate distance = (420 + 360) / 2 = 780 / 2 = 390 m

You might be interested in
How many grams hydrogen in 4.5 mol H2SO4
swat32
H2SO4 ---> 2H^+ + SO4^2-

Hence n H+ = 9 mols

Mass of H = nM = (9*1) = 9g


Alternately

mass of H2SO4= nM= 4.5*98= 441

Mass of H= mass h2so4 * molar mass of H/molar mass of h2so4
Mass of H= 441 * 2/98 = 9g

4 0
3 years ago
A gas has a volume of 240.0mL at 25C and 600.0 mmHg. Calculate it's volume at STP
atroni [7]
760.0 mmHg(V)=600.0mmHg(240.0mL)
600(240)/760=189mL
6 0
3 years ago
Two unknown compounds are tested. Compound 1 contains 15.0g of hydrogen and 120.0g of oxygen. Compound 2 contains 2.0g of hydrog
ivann1987 [24]

Answer:

The both compounds are different.

Explanation:

In order to confirm weather both compounds are same we will check the mole ration. If it is same the compounds will be same.

Given data:

For compound 1.

Mass of hydrogen = 15 g

Mass of oxygen = 120 g

Moles of hydrogen and oxygen = ?

Number of moles of hydrogen = 15 g/ 1g/mol = 15 mol

Number of moles of oxygen = 120 g/ 16 g/mol = 7.5 mol

Total number of moles = 22.5 mol

% of hydrogen = 15 /22.5 × 100 = 66.7%

% of oxygen = 7.5 / 22.5× 100 = 33.3%

For compound 2:

Mass of hydrogen = 2 g

Mass of oxygen = 32 g

Moles of hydrogen and oxygen = ?

Number of moles of hydrogen = 2 g/ 1g/mol = 2 mol

Number of moles of oxygen = 32 g/ 16 g/mol = 2 mol

Total number of moles = 4 mol

% of hydrogen = 2 /4 × 100 = 50%

% of oxygen = 2 / 4× 100 = 50%

7 0
3 years ago
Which of the following a true statement about igneous rocks?
Marta_Voda [28]

Answer:

i think the answer is A....

Explanation:

Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.

8 0
2 years ago
The control rods are made of what materials
tiny-mole [99]
A rod of a neutron-absorbing substance used to vary the output power of a nuclear reactor.
8 0
3 years ago
Other questions:
  • If a sample of gold is a cube what is the length of each edge in centimeters
    13·1 answer
  • Watersheds are sloped areas of land that ?
    11·2 answers
  • How many moles of ethylene can react with 12.9 l of oxygen gas at 1.2 atm in 297 k
    13·1 answer
  • Arrange the following in order of size, from smallest to largest: polymer, monomer, carbon atom,
    12·1 answer
  • What is the similarity between simple diffusion and facilitated diffusion?
    5·2 answers
  • List 3 examples of elements
    15·2 answers
  • Explain the difference between the bohr model and the electron cloud model
    11·1 answer
  • Net ionic equation for 2AgF(aq) + k2S = Ag2S (s) + 2KF(aq)
    13·1 answer
  • 3. If all the waves were measured for a period of 5 seconds, which wave had the highest frequency?
    9·1 answer
  • MULTIPLE CHOICE QUESTION
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!