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
quester [9]
3 years ago
7

A student practicing for a cross country meet runs 250 m in 30s what is her average speed

Chemistry
2 answers:
monitta3 years ago
6 0

Answer:

8.33 meters/sec.

Explanation:

Distance = 250 Meters

Time = 30 sec.

Velocity = Distance / Time

= 250 Meters

30 sec.

= 8.33 meters/sec.

aev [14]3 years ago
3 0

Answer:

Speed = 8.34 m/s

Explanation:

Given =

Distance = 250 meters

Time = 30 seconds

Solution =

Speed = Distance / Time

Speed = 250/30

Speed = 8.3333333 m/s.

Speed = 8.34 m/s

You might be interested in
Balancing Redox Reactions<br> VO2++MnO4 V(OH)4++Mn2+(acidic)
Natasha_Volkova [10]

Answer:

MnO4- + 5 VO +2 + 11 H2O = 5 V(OH)4+ + Mn+2 + 2 H+

Explanation:

3 0
3 years ago
What does applied chemistry have to do with making ice cream?
Lapatulllka [165]

Well you have to mix chemicals which caused a chemical reaction. When you mix salt and ice the freezing point of liquid changes. the ice gets colder

6 0
3 years ago
Read 2 more answers
How many moles are in 110 grams of nahco3
yuradex [85]
Molar mass NaHCO₃ = 23 + 1 + 12 + 16 x 3 = 84 g/mol

1 mole ---------- 84 g
? mole ---------- 110 g

moles NaHCO₃ = 110 . 1 / 84

moles NaHCO₃ = 110 / 84

= 1.309 moles

hope this helps!
4 0
3 years ago
How many miles are there in 20g of KClO3 (k=39 Cl=35.5 O=16)​
SashulF [63]
<h3>Answer:</h3>

0.144 moles

<h3>Explanation:</h3>
  • The relationship between mass of a compound, number of moles and molar mass of the compound is given by;
  • Number of moles = Mass ÷ Molar mass
  • Molar mass is equivalent to the relative formula mass of the compound that is calculated the atomic masses of the elements making the compound.

In this case;

Our compound, KClO3 will have a molar mass of;

= 39 + 35.5 + 4(16)

= 138.5 g/mol

Mass of KClO3 is 20 g

Therefore;

Number of moles = 20 g ÷ 138.5 g/mol

                            = 0.144 moles

Thus, the number of moles in 20 g of KClO3 is 0.144 moles

4 0
3 years ago
Based on the kinetic theory, which statement is true?
Effectus [21]

answer is A

The kinetic theory is used to explain the behaviour of gases.

One of the assumptions states that "a gas is composed of a large number of identical molecules moving at different speeds".

7 0
3 years ago
Read 2 more answers
Other questions:
  • Correct answer to this easy question gets brainliest
    15·2 answers
  • What are other ways you can use wind energy to create electricity?
    10·2 answers
  • a certain gas occupies 5 dm³ at 24 °C and 15 cm Hg. Calculate the pressure of the gas if the volume is halved and the temperatur
    7·1 answer
  • To neutralized 1.65g LiOH, how much .150M HCl would be needed?
    12·1 answer
  • As someone falls toward the Earth, what happens to their GPE?
    5·1 answer
  • Which unit can be used to express solution concentration?
    13·1 answer
  • Please answer right this us due today please don't guess pls
    10·2 answers
  • HELP PLZZZZ GIVE BRAINLIST PLEZZ HELP!!!!!!!!!!!
    11·1 answer
  • Which metal can be obtain from calvertie ores?​
    5·1 answer
  • which type of intermolecular force in water creates the surface tension that allows the stones to skip across the top of the wat
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!