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
lisabon 2012 [21]
3 years ago
8

match the following items......(1. used in engines and rockets souring 2. a type of slow combustion respiration 3. a chemical ch

ange rapid combustion 4. electron loss when combining with another element photosynthesis 5. element in bone which absorbs X-rays calcium 6. reaction in which the product is glucose oxidation
Chemistry
2 answers:
Anna11 [10]3 years ago
8 0

Answer:

Match the following items.

Match the following items.

1. used in engines and rockets  

6

photosynthesis  

2. a type of slow combustion  

4

oxidation  

3. a chemical change  

2

respiration  

4. electron loss when combining with another element  

1

rapid combustion  

5. element in bone which absorbs X-rays  

3

souring  

6. reaction in which the product is glucose  

5

calcium

Explanation:

mezya [45]3 years ago
7 0
1. Rapid combustion - <span>used in engines and rockets souring. Large amount of energy produced.
</span>2. R<span>espiration - </span><span>a type of slow combustion. Organic matter is transfered into energy and carbon dioxide.
3. Soaring - a chemical change. A</span>cidification of milk into soured milk.<span>
4. Oxidation - electron loss when combining with another element. Metals gave electrons to nonmetals and became cations.
5. C</span>alcium - element in bone which absorbs X-rays. Calcium increases the photoelectric effect<span> which increase absorption of X-rays.
6. P</span>hotosynthesis reaction in which the product is glucose. Plants produce glucose from carbon dioxide and water.
You might be interested in
An intravenous infusion is to contain 15 mEq of potassium ion and 20 mEq of sodium ion in 500 mL of 5% dextrose injection. Using
Studentka2010 [4]

Answer:

To supply the required ions it is necessary to inject 5,6mL of 6g/30mL solution and 131,1 mL of 0,9% solution.

Explanation:

1mEq of sodium are 59mg of NaCl and 1mEq of potassium are 75mg KCl

in intravenous infusion 15 mEq of K are:

15x75mg KCl = 1,125g of KCl

And 20 mEq of Na are:

20x59mg NaCl = 1,18g of NaCl

To supply the potassium ion it is necessary to inject:

1,125g of KCl×\frac{30mL}{6g} =<em> 5,6mL  of 6g/30mL solution</em>

And, to supply the sodium ion it is necessary to inject:

1,18g of NaCl×\frac{100mL}{0,9g} = <em>131,1 mL of 0,9% solution</em>

<em />

I hope it helps!

6 0
3 years ago
Draw the structure of the compound C9H12 from its proton (1H) NMR spectrum below. First-order spin-spin splitting rules and equa
Vikki [24]

Answer:

Isopropylbenzene

Explanation:

If you draw the structure, you can see that there are two methyl groups and in between there.

Adjacent to CH3, there are four neighbouring hydrogens, therefore, n=4+1 = 5. The same is for methyl on other side. For carbon present in benzene ring,  there is 2, since there is one hydrogen on benzene per carbon.

4 0
3 years ago
Read 2 more answers
Which of the following measurements is used to measure the enthalpy of combustion? A. None of these B. Measuring the change in t
DaniilM [7]

Answer: Option (C) is the correct answer.

Explanation:

In a substance, the total energy of its molecular motion is known as heat. Whereas when we measure the average energy of molecular motion of a substance then it is known as temperature.

So, any increase or decrease in temperature will lead to change in heat of a substance.

When one mole of a substance is burned then the amount of energy released  in the form of heat is known as heat of combustion.

Relation between heat and temperature is as follows.

                    q = m \times C \times \Delta T

Thus, we can conclude that to measure the enthalpy of combustion it cannot be measured, only calculated using the equation; q = mc \Delta T.

4 0
3 years ago
Which oh these statements describes a chemical property?
Gelneren [198K]

Iron rusts when exposed to air → chemical property

3 0
3 years ago
What is 2n^2 rule ( of science)​
lozanna [386]

2n² rule:

This rule is used to determine number of electrons in particular shell.

n=1 means K shell

n=2 means L shell

n=3 means M shell

n=4means N shell

The first K shell can hold upto 2 electrons, L shell can hold up to 8, third M shell can hold up to 18and the fourth N shell can hold upto 32 electrons. This rule of arrangement of electrons according to the shell is known 2n2 rule where n means number of shell.

For example: There is one proton in the nucleus of hydrogen atom, which moves in K shell path. It has no neutron.

3 0
3 years ago
Other questions:
  • Which of the following does not involve colligative properties?
    9·2 answers
  • A surface wave is a combination of what two waves
    9·2 answers
  • Describes changes<br> in energy during a chemical reaction?
    5·1 answer
  • The substance floats or sinks in another because of its relative
    15·1 answer
  • Hydrogen bonds can be found between molecules of which substance? NH3 H2 HI CH4
    6·1 answer
  • 5. The mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a
    6·1 answer
  • 1. MnO₂ is an example of what type of bond?
    15·2 answers
  • When the number of electrons in an atom changes, then the atom's_______ change.
    7·1 answer
  • Find the molar mass of iron (III) nitrate, Fe(NO3)3
    5·1 answer
  • Which compounds exhibit geometric isomerism? Draw and name the two isomers in each case:(b) 3-hexene
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!