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
Licemer1 [7]
3 years ago
13

In order for a chemical reaction to take place, a certain amount of _____________ must be present. A. heat B. friction C. chemic

als D. energy
I NEED THE ANSWER LIKE..RIGHT NOW!!!!!!!!
Chemistry
2 answers:
ch4aika [34]3 years ago
6 0
I believe it'd be energy. 
Anna35 [415]3 years ago
3 0

The right answer is energy

You might be interested in
Suppose you were to make a ring from a single strand of gold atoms. How many gold atoms would be required to make such a ring? H
Rudiy27
Let us assume that the ring is a size 7 ring, which has a circumference of 54.3 millimeters. Converting this to centimeters, the circumference of the ring is:

54.3 mm = 5.43 cm

Now, we determine the number of gold atoms that will be present in this:

5.43 / 1 x 10⁻⁹

There will be 5.43 x 10⁹ atoms


We now determine the number of moles this is by:

one mole = 6.02 x 10²³ atoms

Moles = 5.43 x 10⁹ / 6.02 x 10²³ 
Moles = 9.01 x 10⁻¹⁵ moles

The molar mass of gold is 197 g/mol

The mass is 9.01 x 10⁻¹⁵  * 197

The mass of the strand is 1.76 x 10⁻¹² grams
8 0
3 years ago
Read 2 more answers
A satellite and a hockey puck are alike because they illustrate Newton's first law of motion.
lutik1710 [3]

Answer:

It would be True

Explanation:

Because they both have the same push of gravity. Gravity affects all objects equally. If you drop an egg and a watermelon at the same time they would both collide with the floor at the same time.

8 0
3 years ago
Information about tectonic plate boundaries has been primarily found by scientists studying data from
taurus [48]
Studying data from earthquakes!
8 0
3 years ago
Read 2 more answers
A balloon contains 2500 ml of helium gas at 75 degrees Celsius. What is the final volume in millimeters of gas when the temperat
REY [17]
I believe the answer is 20 degrees Celsius 
3 0
3 years ago
Why is electromagnetic radiation a transverse wave?
Yuki888 [10]

Since the direction of particle displacement in electromagnetic waves is also perpendicular to the direction of motion, generating the waveform of visible light and other forms of electromagnetic radiation, they are also transverse waves.

In a transverse wave, the displacement is perpendicular to the direction of motion (at an angle of 90 degrees Celsius). The direction of displacement (up and down) in the case of the ocean wave is perpendicular to the direction of wave motion (horizontally along the water), making it a transverse wave.

How far a particle has moved from its original starting position, or, in the case of an ocean wave, how high or low the water is, is measured by its displacement or amplitude.

learn more about displacement here;

brainly.com/question/321442

#SPJ4

6 0
1 year ago
Other questions:
  • What is the solubility of nitrogen and calcium nitrate in cyclohexane?
    14·1 answer
  • What is the oxidation number for iodine in Mg(IO3)2 ?
    13·2 answers
  • An isotope of manganese has 25 protons and 30 neutrons. What is the mass number of this isotope?
    8·1 answer
  • How many substances does a pure piece of matter contain? <br> A. 0 <br> B. 1 <br> C. 2 <br> D. 3
    14·1 answer
  • At what speed do gamma Rays travel?
    14·1 answer
  • What is atomic and mass number
    10·1 answer
  • A compound is found to contain 64.80% carbon. 13.62% hydrogen. And 21.58% oxygen by weight. What is the empirical formula for th
    8·2 answers
  • Show whether the following solutes are soluble in each solvent, and the process of dissolution of each, and their weak bonds. (N
    6·1 answer
  • How many grams of hydroxide pellets, NaOh are required to prepare 50.0ml of a 0.150 M solution ?
    13·2 answers
  • 33.75 g of copper are reacted with 117.5 g silver nitrate. How much excess reactant would be unused or left over( in grams)?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!