Answers
The answer is - 4 thats the charge of Si O
⁴ ¹0
Related Questions
Describe what a phase diagram is
Answers
Answer:
The graph which shows under what conditions of temperature and pressure distinct phases of matter occur is called phase diagram.
Using the heat capacity of water (1 cal/g oC), determine how much energy was released by the combustion of the wax.
Answers
Answer:
hello some part of your question is missing below is the missing part
1. Mass of water in the boiler 336.6g 2. Mass of wax burn 0.289g 3. Increased in the temperature 6.6 C
and change to Joules and to kilojoules
answer : 9.295 kJ
Explanation:
Calculate how much energy was released by the combustion of the wax
ΔT = 6.6°C
Note :The energy released by the combustion of wax is absorbed by the water
heat = mass * specific heat capacity * ΔT
= 336.6 * 1 * 6.6 = 221.56 cal
convert; 221.56 cal to J
= 221.56 * 4.184 = 9295.0 J
hence the energy released by the combustion of the wax = 9.295 kJ
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 11.0 grams. What is his percent yield?
Answers
Answer:
Option D.
Explanation:
Percentage yield = Actual yield / Theoretical yield * 100%
Actual yield = 11.0 grams
Theoretical yield = 12.3 grams
Percentage yield = 11.0 / 12.3 * 100
Percentage yield = 89.43%
What is the physical composition of our
air? What types of things is our air made
up of? Describe what it may look like, its
size, etc.
Answers
Answer:
Air is mainly a mixture of two gases.
Explanation:
Air is mainly a mixture of two gases, nitrogen (around 78%) and oxygen (around 21%). It also contains carbon dioxide (around 0.03%), noble gases (around 0.9%), water vapour and a very small amount of other kinds of gases. Air makes up the atmosphere, which is essential for life on Earth.
(FYI, argon has the highest percentage of composition among the noble gases)
IF ANSWER I WILL GIVE BRAINLESS
Question 9 (4 points)
If the 2nd Level consumers had 10 joules of energy in this food chain, how much energy was at the producer level?
Question 10 (4 points)
Why doesn't the total amount of energy from the producers make it to the owl? What evidence supports your answer?
Answers
Answer:
Answer 9 - 100 joules energy was at the producer level
Answer 10 - Remaining energy is used in metabolism
Explanation:
Answer 9
The energy at each trophic level is only 10% of the energy at its previous trophic level.
The energy at producer level is X
[tex]10[/tex] % of [tex]X = 10[/tex] Joules
[tex]\frac{10}{100} * X = 10\\X = 100[/tex]Joules
Answer 10
Because the remaining 90% energy is utilized by the producer for its metabolism
The graph shows temperature anomalies for Earth over the
last 800,000 years. A temperature anomaly is a variation
from the average temperature. A positive temperature
anomaly indicates a temperature that is higher than
average.
-600,000
-800,000
-200,000
-400,000
Year
Which two trends do the data show?
Please help ASAP !!
Answers
Answer:multiple periods of warmer, and there are natural cycles or warmer.
Explanation: trust me
What is the overall charge of an ion that has 11 protons, 13 electrons and 12 neutrons?
Answers
Answer:
+1
Explanation:
To calculate the charge on an ion, we simply use the number of protons and electrons. Protons are the positively charged subatomic particles. The electrons are the negatively charged particles in an atom.
When the number of protons are greater than that of electrons, the ion is positively charged.
When the number of protons are lesser than that of electrons, the ion is negatively charged.
When the number of protons and electrons are equal, the ion is neutral.
Answer Below and top
Charge = Protons - Electrons = 11 - 10 = +1
Have a good day and plz mark me brainliest!!
Answer:
-2
Explanation:
Which details from “When Volcanoes Erupt” would be important to include in a summary of the text? Select three details.
A.
Floods can be very dangerous and can destroy towns.
B.
Many animals can sense a natural disaster is coming.
C.
Scientists can make predictions that keep people from being in danger when volcanoes erupt.
D.
There are volcanic eruptions every year.
E.
Volcanic eruptions are natural processes, even though they can be deadly.
Answers
The important details that should be present in summary of the “When Volcanoes Erupt” are Many animals can sense a natural disaster is coming, Scientists can make predictions that keep people from being in danger when volcanoes erupt and Volcanic eruptions are natural processes, even though they can be deadly.
What is volcanic eruption?It is a natural disaster, in which gases and lava comes from the volcano in the explosively manner.
Many animals have sense of vibrations that are generated during the natural disaster and may run from that place. Scientists also do prediction about natural disasters by studying geographical changes and may help people from danger.
Hence options (B) , (C) and (E) are correct.
To know more about natural disasters, visit the below link:
https://brainly.com/question/356938
All systems disperse their energy spontaneously?
Is it true or false? and WHY?
Answers
Answer:
True.
Explanation:
Yes, all systems disperse their energy spontaneously because all types of energy spontaneously flows from concentrated to dispersed if it is not hindered by any material in their way. Energy can be prevented from spreading by materials such as containers. If there is no substance in the path of energy so it can disperse automatically from a concentrated region to a lower region.
The products of a chemical reaction are chemically different substances than the reactants of a chemical reaction.
True or false?
Answers
this statement is true
Answer:
Hope it helps u
When you produce a current/electron flow through a copper wire with a generator; the wire itself carrying the current (electron flow) also produces
a magnetic field.
True or false ?
Answers
What is enthalpy and how is it different than heat?
Answers
Answer:Heat is a transfer of energy due to a temperature difference. Enthalpy is the change in amount of heat in a system at constant pressure. You can only use heat and enthalpy interchangeably if there is no work being done to the system.
Explanation:
4) How many atoms are present in a sample of oxygen, O2 with 12.222 moles?
Answers
Answer:
two oxygen atoms
you want 200 mL of a 0.1 g/mL solution of sugar. how do you prepare the solution?
Answers
PLEASE HELP WILL GIVE BRAINLIEST AND 100 POINTS
Answers
the answer to your question is C
A compound MBr4 has a relative formula mass of 439
What is the relative atomic mass of M (Br=80)
Answers
Answer:
119
Explanation:
because the molecular mass of MBr can be found by adding the individual atomic masses of the molecule
Molar mass of M + 4(Molar mass of Br)= Molar mass of
MBr
Molar mass of M +4(80)= 439
Molar mass of M +320 = 439
Molar mass of M = 439 -320
Molar mass of M =119
HELP ME PLEASE (brainliest)
Answers
Answer: i would say D or the last one.
Explanation: According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
Hope this helps :) Can u plz mark me branliest
If you are correct you get a brainless
(07.01 MC)
As a part of the life cycle of plants, the plant must begin with an embryo. What statement best describes where the embryo can be found in flowering and non-flowering plants? (2 points)
Answers
(don’t count on my answer but I think it might be this one and I apologize if you get it wrong)
which two statements correctly describe the theory of plate tectonices
Answers
Answer:
It explains how continents have shifted over time and It was developed based on data that scientists collected about the ocean floor.
How many moles are in 1.51 x 10^24 molecules of water?
Answers
Answer:One mole of HBr has 6.02 x 1
0
23
molecules of HBr.
1 mole of HBr = 6.02 x 1
0
23
molecules of HBr.-----(a)
X mole of HBr has 1.21 x
10
24
molecules of HBr.
X mole of HBr = 1.21 x
10
24
molecules of HBr------(b)
Taking ratio of (a) and (b)
X / 1 = 1.21 x
10
24
/ 6.02 x 1
0
23
X= 2.009 moles.
Explanation:
I can be formed into a sheet, I am high in luster, and am a very good conductor. I must be a ...
a
metal
b
nonmetal
c
metalloid
d
noble gas
Answers
Answer: metal
Explanation:
The diameter of a circle is 14 kilometers. What is the circle's circumference?
Answers
Answer:
C = 43.96
Explanation:
Formula:
C = 2πr
r = 14/2 = 7
C = 2(3.14)(7)
C = 43.96
I NEED HELP PLS PLS PLS
Answers
Which of the following would be a part of an environment engineer's job description ?
Answers
Answer:
where is the options
Explanation:
give options
what is the cation and anion formula for each compound
Answers
Answer:
cation ca2+ anion cl-
Explanation:
please see the picture your answer is there
what is on the left side ?
Answers
Answer:
reactants
Explanation:
Please helppppppppppppppppppp
50 ppoints
Answers
Answer:
I can’t see the whole page
Explanation:
9. The pH of an acidic solution is
A) greater than 14.
B) greater than 7.
C) less than 0.
D) less than 7.
Answers
Answer: d
Explanation:
i need a short paragraph (about two sentences) describing the geologic time scale.
Answers
The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration—eons, eras, periods, epochs, and ages.
periodiate has how many oxygen
2
3
4?
Answers
Answer:
4
Explanation:
it has 4 oxygen
hope this helps
Answer:
The law companies that value excessive ethics comply with the legal guidelines not solely in letter however go past what