Answers
Answer: A
Explanation:
Answer:
The answer is A
Explanation:
Related Questions
Given the standard heats of reaction
Reaction ∆H 0
M(s) + 2 X2(g) → MX4(g) −98.7 kJ/mol
X2(g) → 2 X(g) +327.3 kJ/mol
M(g) → M(s) −20.1 kJ/mol
calculate the average bond energy for a single
M-X bond.
Answer in units of kJ/mol.
Answers
Answer:
Explanation:
M(s) → M (g ) + 20.1 kJ --- ( 1 )
X₂ ( g ) → 2X (g ) + 327.3 kJ ---- ( 2 )
M( s) + 2 X₂(g) → M X₄ (g ) - 98.7 kJ ----- ( 3 )
( 3 ) - 2 x ( 2 ) - ( 1 )
M( s) + 2 X₂(g) - 2 X₂ ( g ) - M(s) → M X₄ (g ) - 98.7 kJ - 2 [ 2X (g ) + 327.3 kJ ] - M (g ) - 20.1 kJ
0 = M X₄ (g ) - 4 X (g ) - M (g ) - 773.4 kJ
4 X (g ) + M (g ) = M X₄ (g ) - 773.4kJ
heat of formation of M X₄ (g ) is - 773.4 kJ
Bond energy of one M - X bond = 773.4 / 4 = 193.4 kJ / mole
name two units for density? I need help!!!!
Answers
Answer:
Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Explanation:
Mr. Bullis wants to know if he gives teachers candy, it will make them smile more. He gives half the teachers candy and the other half get nothing. He then records the number of times the teachers smiled.
Experimental Group:
Control Group:
Answers
Answer:
the experimental group would be the teachers who recieved the candy
control group would be the teachers who dont get any candy
Explanation:
experimental group is the group that receives the test variable being tested in this case the variable being the candy
and the control group is the group who doesn't receive the variable
purpose of having a control is to rule out other factors which may influence the results of an experiment.
A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.
Experimental Group:
Control Group:
Answers
And the control group is the ducks in room temperature water
which substance is a mixture? A. table salt B. gasoline C. aluminium D. carbon dioxide
Answers
A 2.3 kg object has 15 ) of kinetic energy. Calculate its speed.
O A. 0.12 m/s
OB. 1.1 m/s
O c. 2.4 m/s
OD. 3.6 m/s
Answers
Answer:
The answer is option DExplanation:
To find the speed given the kinetic energy and mass we use the formula
[tex]v = \sqrt{ \frac{2KE}{m} } \\ [/tex]
where
m is the mass
v is the speed
From the question
KE = 15 J
m = 2.3 kg
We have
[tex]v = \sqrt{ \frac{2 \times 15}{2.3} } = \sqrt{ \frac{30}{2.3} } \\ = 3.61157559...[/tex]
We have the final answer as
3.6 m/sHope this helps you
Convert the following to Celsius
16) 100°K
17) 200°K
18) 273°K
19) 350°K
Answers
Answer:
16) -173.15cel
17)-73.15cel
18)-0.15
19)76.85
Explanation:
I converted kelvins to cel
Brainly pls
what is the electron configuration for gallium
Answers
Answer:
[Ar] 3d^104s^24p^1
What does the speed of the mixing colors tell you about the speed of the
molecules in hot and cold water?
Answers
The distance of the Kentucky Derby, a classic horse race, is 1.25 miles. How is this distance expressed in furlongs ?
Answers
1.25 x 8
Which is 10 furlongs
How is iodine 131 similar to a normal atom of iodine?
Answers
Answer: Iodine 131 is a radioisotope with a very short half-life of 8.02 days, making it highly radioactive.
Explanation:
Is sulfur dioxide a element?
Answers
yes it is a element.
What is a scale and why do you use it?
Answers
Answer:
Scale is defined as a system or series of marks used for measuring or registering. An example of scale is what someone would use to figure out the length of something. An example of scale is what someone would use to find out how much they weigh.
Explanation:
The equation, reactants
product + thermal energy, describes a(n)_____
reaction.
Answers
Answer: Here you go
Explanation:
The general equation for an exothermic reaction is: Reactants → Products + Energy.
HELP ME PLEASE!!
HELP!!!
Opportunity cost refers to:
A. the price of a good set by supply and demand in a market.
B. the inability of an economy to address all people's needs.
C. the lost chance to make one choice when another is made.
D. the economic motivation for a business to produce a good or
service.
SUBMIT
Answers
Answer:
C
Explanation:
All covalent compounds donot exist as giant aggregates. Why?
Answers
PLEASE HELP WILL GIVE BRAINLIEST
Answers
Question 1
Why can't wee see atoms?
Answers
Answer:
They're too small
Explanation:
Atoms are smaller than the wavelength of visible light
Answer:
too small
Explanation:
What is the importance of protons ?
Answers
Protons are important because they help keep the nucleus together, they also attract negatively charged electrons and keep them in orbit around the nucleus.
What do you think is the difference between an "open" system & a "closed" system?
Answers
Answer:
Hope it help you
Stayhomestaysafe
Plz mark my answer brainliest✍️✍️
Explanation:
There are three types of systems in thermodynamics: open, closed, and isolated. An open system can exchange both energy and matter with its surroundings. ... A closed system, on the other hand, can exchange only energy with its surroundings, not matter.
REAL NAME - SHRESTH DUBEY
What is the term used to describe a change in motion?
Answers
Answer:
it should be momentum if im not mistaken
If you put 8 protons and 8 neutrons, which element did you make?
oxygen
sulfur
berllium
gadolinium
Answers
The element found in Group 13, Period 2 is ______ a- Al b- Be c- B d- Mg
Answers
A plant's growth response to water is called _____.
hydrotropism
geotropism
gravitropism
thigmotropism
Answers
Answer:
A or Hydrotropism
Explanation:
Answer:
hydrotropism Explanation:
because hydro= water and topism= the turning part of an organism hope this helps!! <3
This chart shows characteristics of three different types of atoms.
A 3-column table with one row titled valence electrons in three types of atoms. The first column labeled Atom X has entry 6 valence electrons. The second column labeled Atom Y has entry 2 valence electrons. The third column labeled Atom Z has entry 8 valence electrons.
Which statement is best supported by the information in the chart?
Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.
Answers
Atom X will accept electrons from Atom Y.
Answer:
B) Atom X will accept electrons from Atom Y.
Explanation:
because X has 6 electrons and Y has 2 it would make sense for Y to give to X
Which classification best describes oxygen gas? a element b compound c solution d heterogeneous mixture
Answers
Answer:
oxygen is an element because it is a pure substance which cannot be split into simpler substances by chemical means
Which of the following neutral atom configurations satisfies the octet rule?
1s2 2s2 2p6 3s2 3p6
1s2 2s1
1s2 2s2 3s2 3p4
1s2 2s2 3s2 3p6 4s1
Answers
Answer:
2
Explanation:i did the test
If a can of soup 150 g mass and 0.75g/ cm^3 density what’s the volume
Answers
Answer:
The answer is 200 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density}\\[/tex]
From the question
mass = 150 g
density = 0.75 g/cm³
We have
[tex]volume = \frac{150}{0.75} \\ [/tex]
We have the final answer as
200 cm³Hope this helps you
What mass of water freezes if 5.43 kJ oh heat are released in the process
Answers
Answer:
16.3 g
Explanation:
got it right on ck
HELP!!!! PLEASE, it would be much appreciated.
Answers
d it is made of cells
Explanation:
because it is the one that makes most sense