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
kodGreya [7K]
3 years ago
9

The equation for the chemical reaction shown is not balanced. What number should replace the question mark to balance this equat

ion?
2KBr + ?Pb(NO3)2 → 2KNO3+ PbBr2

A.
The equation is balanced as is.

B.
A 6 is required.

C.
A 3 is required.

D.
A 2 is required.
Physics
1 answer:
Fudgin [204]3 years ago
7 0
The equation is balanced as it is.
You might be interested in
A rolling ball has an initial velocity of 1.6 meters per second. if the ball has a constant acceleration of 0.33 meters per seco
lukranit [14]
We have:

Initial velocity (u) = 1.6 m/s
Constant acceleration (a) = 0.33 m/s²
Time (t) = 3.6 sec

There are five constant acceleration equations that would help us to find the velocity:

v=u+at
s=ut+ \frac{1}{2}at^2
s= \frac{1}{2}(u+v)t
v^2=u^2+2as
s=vt- \frac{1}{2}at^2

Since we have u, a, t and we want v
We will use the first formula v=u+at

v=1.6+(0.33)(3.6)
v= 2.788 m/s
7 0
2 years ago
A balloon of mass M is floating motionless in the air. A person of mass less than M is on a rope ladder hanging from the balloon
Tasya [4]

Let the mass of the person be m. Total momentum is conserved (because the exterior forces on the system are balanced), especially the component in the vertical direction.

Given that,

Mass of gallon is M

Let man mass be m

Velocity of man is v

Let velocity if ballot be Vb

When the person begin to move we have

Conservation of momentum

mv + MVb=0

MVb=-mv

Vb= -(m/M) v

Given that the mass of man is less than mass of balloon. i.e. m<M

So, if m<M, then, m/M <1

Therefore, .

Vb= -(m/M) v

Vb< -v

This implies that the velocity of balloon is less than the velocity of man and if is also moving in opposite direction

So the man is moving upward, then the balloon is moving downward and it's velocity is less than the velocity of man,

The answer is C

Down with a speed less than v

6 0
3 years ago
Read 2 more answers
How does mass differ from weight? List 2 differences.
Alinara [238K]

weight is vector vary from place to place

5 0
2 years ago
Read 2 more answers
The metric unit to measure work which equals one newton meter<br> is called?
Solnce55 [7]
The metric unit to measure work which equals one newton meter is called One Joule.
8 0
3 years ago
In this reaction diagram which part represents the doffrence in energy between the reactants and the products?
Annette [7]

Answer:

The correct answer is - option C. G.

Explanation:

In this reaction diagram, there is a representation of the reaction profile. The reaction profile shows the change that takes place during a reaction in the energy of reactants or substrate and products. In this profile, activation energy looks like a hump in the line, and the minimum energy required to initiate the reaction.

The overall energy of the reaction, including or excluding activation energy depends on the nature of the reaction if it is exothermic or endothermic. and products are represented by the G which shows the difference between the energy of the reactants and products.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Which of the following pairs of terms directly relates to the actual brightness of a star?
    9·2 answers
  • An object weighs 100 newtons on earth's surface when it is moved to a point one earth radius above earth's surface it will weigh
    10·2 answers
  • A 56.0 kg box hangs from a rope. what is the tension in the rope if: the box has vy = 5.30 m/s and is speeding up at 5.10 m/s2 ?
    15·1 answer
  • The driver and front seat passengers should sit at least _____ inches away from the air bag.
    11·1 answer
  • In an arcade game a 0.099 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releas
    10·1 answer
  • You are kicking your soccer ball back and forth on a soccer field. You kick the ball forward for 10 m. You turn completely aroun
    14·1 answer
  • 5.
    9·1 answer
  • Name any three natural phenomena​
    9·1 answer
  • A sprinter accelerates from rest to a top speed of 24 km/h in 2 seconds and then runs at a constant velocity for the rest of the
    5·1 answer
  • A spacecraft travels at 1.5 X 108 m/s relative to Earth. A process onboard the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!