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
tatiyna
3 years ago
14

Convert 238 cm to the unit km. 0.00238 km 0.238 km 2.38 x 105 km 2.38 x 107 km

Chemistry
1 answer:
TEA [102]3 years ago
6 0

238 cm = 0.002 38 km

<em>Step 1</em>. Convert <em>centimetres to metres</em>

238 cm × (1 m/100 cm) = 2.38 m

<em>Step 2</em>. Convert <em>metres to kilometres</em>

2.38 m × (1 km/1000 m) = 0.002 38 m

You might be interested in
9) All elements can be sorted into 3 simple groups:
serious [3.7K]

Answer: B) metals, non-metals, metalloids

An example of a metal is iron. A non-metal example is oxygen, which is a gas at STP (standard temperature and pressure).

A metalloid is a bit of a mix between a metal and non-metal element. It's sorta like an element that has both properties of metals and non-metals, or it's in a murky gray area. An example of a metalloid would be silicon.

6 0
2 years ago
Read 2 more answers
if we add mass to a paper airplane then the distance of the plane flies will increase or decrease why?
Ann [662]
It matters to the aerodynamics of it because sometimes it's good to have the weight but only if it can take it.
8 0
3 years ago
The mass number for an atom is numerically equal to which quantity
Misha Larkins [42]

Answer:

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.

Explanation:

protons

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

4 0
3 years ago
What volume, in mL, of carbon dioxide gas is produced at STP by the decomposition of 0.242 g calcium carbonate (the products are
damaskus [11]

Answer:

54.21 mL.

Explanation:

We'll begin by calculating the number of mole in 0.242 g calcium carbonate, CaCO3.

This is illustrated below:

Mass of CaCO3 = 0.242 g

Molar mass of CaCO3 = 40 + 12 +(16x3) = 40+ 12 + 48 = 100 g/mol

Mole of CaCO3 =?

Mole = mass /Molar mass

Mole of CaCO3 = 0.242/100

Mole of CaCO3 = 2.42×10¯³ mole.

Next, we shall write the balanced equation for the reaction. This is given below:

CaCO3 —> CaO + CO2

From the balanced equation above,

1 mole of CaCO3 decomposed to produce 1 mole CaO and 1 mole of CO2.

Next, we shall determine the number of mole of CO2 produced from the reaction.

This can be obtained as follow:

From the balanced equation above,

1 mole of CaCO3 decomposed to produce 1 mole of CO2.

Therefore,

2.42×10¯³ mole of CaCO3 will also decompose to produce 2.42×10¯³ mole of CO2.

Therefore, 2.42×10¯³ mole of CO2 were obtained from the reaction.

Finally, we shall determine volume occupied by 2.42×10¯³ mole of CO2.

This can be obtained as follow:

1 mole of CO2 occupies 22400 mL at STP.

Therefore, 2.42×10¯³ mole of CO2 will occupy = 2.42×10¯³ x 22400 = 54.21 mL

Therefore, 54.21 mL of CO2 were obtained from the reaction.

7 0
3 years ago
To start the chemical reaction, what must happen between the enzyme and the substrate?.
yaroslaw [1]
The enzyme must attract substrates to its active state.
At the end of the reaction, products dissociate from the surface of the enzyme
6 0
2 years ago
Other questions:
  • The number of protons in a neutral atom is balanced by an equal number of
    5·1 answer
  • Why unit of force is derived unit? ​
    8·1 answer
  • A neutron breaks down to form ?
    11·1 answer
  • What are the products of RbNO2 + BaCO3? <br><br> Please help!
    15·1 answer
  • When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced.
    8·1 answer
  • 17 moles of oxygen is equal to
    11·1 answer
  • Which represents the greatest mass of fluorine?
    15·1 answer
  • Charcoal samples from Stonehenge in England emit 45.1% of the disintegrations per gram of carbon per minute expected for living
    8·1 answer
  • Which element on the periodic table is the lowest mass in period 4??
    14·1 answer
  • Iodine and tellurium were swapped by Mendeleev in the Periodic Table so that they were not in order of atomic weight. State the
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!