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
anzhelika [568]
3 years ago
9

A balloon is at a height of 30 meters, and is rising at the constant rate of 5 m/sec. A bicyclist passes beneath it, traveling i

n a straight line at the constant speed of 10 m/sec. How fast is the distance between the bicyclist and the balloon increasing 2 seconds later?
Chemistry
1 answer:
Shtirlitz [24]3 years ago
4 0
The balloon has traveled 30 meters up from the bicyclist and since it's rising 5 meters per second, 2 seconds later it will travel 10 meters higher. 2 seconds later the bicyclist will travel 20 meters away.   so 10+20+30= 60 meters away from each other. 
You might be interested in
What is the pH of a solution that contains 25 grams of hydrochloric acid (hcl) dissolved in 1.5 liters of water?
Darina [25.2K]
First we calculate the concentration of HCl:

Moles = mass / Mr
= 25 / 36.5
= 0.685 mol

Concentration = 0.685/1.5 = 0.457 mol / dm³

For a strong monoprotic acid, the concentration of hydrogen ions is equal to the acid concentration.

pH = -log[H+]
pH = -log(0.457)
= 0.34
4 0
3 years ago
I know how to do electron configuration, but I think I’m doing the rest wrong. Answers and explanations would be much appreciate
Natasha_Volkova [10]

Your answers seem great so far, except for a tiny issue: With the ionic symbols, try to get into the habit of using "+", with metals, like sodium, and try to use the integer first. So, for example, a potassium ion would be K^+, while an oxide ion would be O^2-


Let's take aluminium as an example I'll work through:

Aluminium, with it's atomic number of 13, will have an electronic configuration of 1s2 2s2 2p6 1s2 2p1. So it would have 2, 8, 3 electrons in the first three energy levels, respectively.

Usually, if an elemental atom has a valence electron (highest energy level electron) count less than 4, it almost always will lose electrons. Since aluminium has 3, it will also lose the electrons.

It loses the 3 valence electrons, and so will end up with 10 electrons.

Since the atomic number also tells how many protons it has, we know that an aluminium atom has 13 protons, which doesn't change.

Since the size of the charges of a proton and an electron are the same, with protons being positive and the electrons being negative, an aluminium ion would have a charge of +3, and the Ionic symbol would be Al^3+



Hope I helped! xx


4 0
3 years ago
9. What coefficient of H+ balances the atoms in this half-reaction?<br> H+ + MnO₂ → Mn²+ + H₂O
algol13

Answer:4

Explanation:To balance the equation you need to make the number of each element equivalent in both sides.

To start add a 2 in front of the MnO2 which balances the Mn.

Then balance the oxygen by adding a 4 in front of H20.

The H then needs a 8 as it’s coefficient.

7 0
1 year ago
Aluminium +hydrochloride acid ________+_________​
REY [17]

Answer:

Aluminium Chloride + Hydrogen

Please vote for Brainliest and I hope this helps!

4 0
2 years ago
How many moles are in 1.51 x 10^24 molecules of water?
lyudmila [28]

Answer:One mole of HBr has 6.02 x 1

0

23

molecules of HBr.

1 mole of HBr = 6.02 x 1

0

23

molecules of HBr.-----(a)

X mole of HBr has 1.21 x

10

24

molecules of HBr.

X mole of HBr = 1.21 x

10

24

molecules of HBr------(b)

Taking ratio of (a) and (b)

X / 1 = 1.21 x

10

24

/ 6.02 x 1

0

23

X= 2.009 moles.

Explanation:

3 0
3 years ago
Other questions:
  • What is the approximate pH of a .06 M solution of CH3COOH given that Ka= 1.78*10-5
    12·1 answer
  • The table shows the thermodynamic data for a reaction. Thermodynamic Data Energy of the Reactants Energy of the Products Activat
    9·2 answers
  • A first place finisher in a cross country meet ran 5,000 meters in 871.7 seconds. What was his average speed?​
    15·1 answer
  • 11. Calculate the energy required to produce 12.00 mol of CI207 on the basis of the
    12·1 answer
  • Explain, in detail, how you convert grams of one substance to grams of something else. Be specific and include each step
    13·1 answer
  • If you are needing at least 100. grams of HCI to be produced, how many
    10·1 answer
  • Select all actions below that you must take to ensure laboratory safety during the experiment. Check all that apply
    10·1 answer
  • Pleaseeeeeeeee
    7·1 answer
  • DONT GUESS OR YOUR ANSWER GETS REPORTED!!Students who like information presented to them in a sequential order likely think with
    5·1 answer
  • Which quantity must be determined experimentally in order to determine the bonding atomic radius of an atom?.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!