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
Nataly_w [17]
3 years ago
10

Radiation _____. A. occurs in solids. B. occurs in liquids. C. requires physical contact between molecules. D. is the method of

heat transfer used by the sun
Chemistry
1 answer:
Bingel [31]3 years ago
6 0
A.

Radiation occurs in many solid materials and objects that contain contain a certain amount of heat in them.
You might be interested in
In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be n
melamori03 [73]

Answer:

54 g

Explanation:

Given data:

Mass of carbon = 18 g

Mass of CO₂ = 72 g

Mass of oxygen needed = ?

Solution:

Chemical reaction:

C + O₂     →       CO₂

according to law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

In a similar way,

C   +    O₂     →       CO₂

18 g +   X      = 72

X = 72 -18

X = 54 g

Thus, 54 g of O₂ are required.

3 0
3 years ago
Read 2 more answers
HELPPP!!
lord [1]

Answer:

The anion at the end on the compound

Explanation:

to check whether a substance is soluble or not, you would find the anion at the end of the compound on a solubility chart and then see from there whether it is soluble or not

5 0
3 years ago
A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scien
Paha777 [63]
It would be C because It will have a lower activation energy than Trial A.
7 0
3 years ago
Read 2 more answers
A 215-g sample of copper metal at some temperature is added to 26.6 g of water. The initial water temperature is 22.22 oC, and t
andrezito [222]

The initial temperature of the copper metal was 27.38 degrees.

Explanation:

Data given:

mass of the copper metal sample = 215 gram

mass of water = 26.6 grams

Initial temperature of water = 22.22 Degrees

Final temperature of water = 24.44 degrees

Specific heat capacity of water = 0.385 J/g°C

initial temperature of copper material , Ti=?

specific heat capacity of water = 4.186 joule/gram °C

from the principle of:

heat lost = heat gained

heat gained by water is given by:

q water = mcΔT

Putting the values in the equation:

qwater = 26.6 x 4.186 x (2.22)

qwater = 247.19 J

qcopper = 215 x 0.385 x (Ti-24.4)

              = 82.77Ti - 2019.71

Now heat lost by metal = heat gained by water

82.77Ti - 2019.71 = 247.19

Ti = 27.38 degrees

8 0
3 years ago
Are those correct if not tell me which are wrong I need help with number 21 also
adelina 88 [10]
For 23., you have to find a way to measure your heart rate not increase it. search it up on google.

3 0
3 years ago
Read 2 more answers
Other questions:
  • How many neutrons does an element have if its atomic number is 41 and its mass number is 170?
    8·1 answer
  • What is the mole fraction of solute and the molal concentration for an aqueous solution that is 16.0% NaOH by mass?
    6·1 answer
  • Which of these is not true of Bohr's model of the atom ?
    11·2 answers
  • What do scientist use to measure the mass of a substance
    12·1 answer
  • When methane (CH4) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reacti
    6·1 answer
  • Briefly compare and contrast the relative resistance to ph change of the seven solutions
    5·1 answer
  • I am confuse and need help
    10·1 answer
  • It is 12:00 and you just heard that local officials are tracking a violent storm heading westward, directly for your town and sc
    7·2 answers
  • In Part A, we saw that the theoretical yield of aluminum oxide is 0.700 mol . Calculate the percent yield if the actual yield of
    13·1 answer
  • 1. Calculate the average atomic mass of rubidium. Rubidium has two isotopes, 85Rb and 87Rb. 85Rb has an atomic mass of 84.912 am
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!