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
aivan3 [116]
2 years ago
15

Which element do plants need a lot of in order to go?

Chemistry
1 answer:
OLga [1]2 years ago
5 0
Plants need nitrogen to grow.
You might be interested in
What is the ph of a peach with a [ –oh] = 3.2 × 10 –11 m?
iogann1982 [59]
H+= 10^-14 / [OH-1 = 3.125 * 10^-4 M
pH=-log(H+) = 3.505

Just round it down and your answer = 3.5
3 0
2 years ago
Which law explain why tire pressure increases on a summer day
Musya8 [376]
Boyle's law 

I hope this helps
3 0
3 years ago
Convert 99 moles of CO2 to atoms
lorasvet [3.4K]

Answer:

              1.78 × 10²⁶ Atoms

Explanation:

Relation between number of molecules and moles is,

No. of Molecules = Moles × 6.022 × 10²³ Molecules/mol

No. of Molecules = 99 mol × 6.022 × 10²³ Molecules/mol

No. of Molecules = 5.96 × 10²⁵ Molecules

Also, In CO₂ Molecule there are 3 atoms.

So,

No. of atoms = 5.96 × 10²⁵ Molecules × 3

No. of atoms = 1.78 × 10²⁶ Atoms

3 0
2 years ago
Two aircraft rivets, one iron and the other copper, are placed in a calorimeter that has an initial temperature of 20.°C. The da
Igoryamba

The heat will flow from Cu to Fe because Cu has higher temperature and has lower peak value .

Given ,

two aircraft rivets , one iron and the other copper , are placed in a calorimeter .

the initial temp of the calorimeter is 20 degC .

mass of iron = 30 g

initial temp of iron = 0 degC

Mass of copper = 20 g

initial temp of copper = 100 degC

Here copper has higher temp ,thus heat flow from Cu to Fe .

<h3>What is heat flow ?</h3>

Heat flow is the movement of heat from higher temperature to lower temperature .

<h3>What is calorimeter ?</h3>

It is an object used for measuring the heat flow , heat capacity of a chemical reaction as well as the physical changes .

Learn more about calorimeter here :

brainly.com/question/1407669

#SPJ4

8 0
1 year ago
Select the equations below that represent physical changes.
Ierofanga [76]

Physical changes- any change in the physical properties of the substance is a physical change. Generally physical properties include color, state, size , shape, odour, appearance . In any phyical change, no new substance is formed.

Chemical changes- any change in the chemical properties of the substance is a chemical change. Chemical properties changes only when something new is formed during a reaction.

∴ <u>Part A</u>- 2 H2O(l) → 2 H2(g) + O2(g)

In this, H2 and O2 is produced during the reaction which is different from H20. Thus, it is a chemical change.

<u>Part B</u>- H2O(l) → H2O(s)

In this, only the state of water changes from liquid to solid and no new product is formed. Thus, it is a physical change.

<u>Part C</u><u>-</u>CO2(s) → CO2(g)

In this also, only the state of CO2 changes from solid to gas and no new product is formed. Thus, it is a physical change.

<u>Part D-</u>H2(g) → 2 H(g)

In this reaction, H2 molecule is dissociated into 2 hydrogen atom leading to formation of new products. Thus, it is a chemical change.

Finally, equations that represent physical changes are - B and C

B. H2O(l) → H2O(s)

C. CO2(s) → CO2(g)



6 0
3 years ago
Other questions:
  • A substance which melts/boils at a fixed temperature is a pure substance.<br><br> True<br> False
    6·2 answers
  • The lewis electron-dot structure of n2 has ________ nonbonding electrons pairs, ________ bonding electron pairs, and a bond orde
    12·1 answer
  • When matter and energy change forms within a closed system, A. the total amount of matter changes, but the total amount of energ
    8·2 answers
  • Please help with chem question
    7·1 answer
  • Can someone help me with this please!
    13·1 answer
  • What is the chemical name of the compound. Cu2CO3
    13·1 answer
  • Where is tenessine on the periodic table?
    9·1 answer
  • A gas occupies a 1.5 l container at 25 degrees
    13·1 answer
  • What 3 atoms have 16 protons
    11·1 answer
  • Please help with this question ;/
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!