Answer:
ans .4
Explanation:
SiO2 +HF ⇒ SiF4 +H2O
reactant side product side
Si = 1 Si = 1 its balanced
O = 2 O = 1 (× WITH 2 ) we got O =2 And H = 4
H = 1 H = 2 NOW H =4
F= 1 (×4) F = 4
now we get SiO2 +4 HF ⇒SiF4 +2 H2O
After multiply with number again check it. Si = 1, O = 2 ,H=4 ,F=4
The coefficient for hydrogen fluoride is 4.
The correct option is D, 4.
What is hydrogen fluoride?It is a chemical compound with chemical formula HF.
It is a colorless gas or liquid.
[tex]\rm SiO_2 +HF = SiF4 +H_2O[/tex]
We will calculate the moles of compounds on both side
Reactant side Product side
Si = 1 Si = 1 its balanced
O = 2 O = 1 (multiply it by 2)
o =2 and H = 4
H = 1 H = 2 NOW H =4
F= 1 (×4) F = 4
The balanced equation is
[tex]\rm SiO_2 +4 HF =SiF_4 +2 H_2O[/tex]
Thus, The coefficient for hydrogen fluoride is 4.(D).
Learn more about HF, here:
https://brainly.com/question/7218888
What are the chemical building blocks of proteins called?
Pls
Answer:
the chemical building blocks of proteins is called amino acids.
Why can’t fossil fuels be replaced right away?
If you answer I will give you Brainlist PLEASE HELP
Answer:
Fossil fuels cause local pollution where they are produced and used, and their ongoing use is causing lasting harm to the climate of our entire planet. Nonetheless, meaningfully changing our ways has been very difficult.
i need help pls
its due tomorrow i wanna get the answer right pls.
Answer:
1) Without our atmosphere we wouldn't have life! The atmosphere protects our earth from letting harmful substances or rocks into our planet, which could cause damage.
2) You interact with the atmosphere in both good ways and bad. You interact by putting up things like flowers and trees, but in bad ways by releasing bad things (like carbon dioxide) and by light pollution!
3) The factors that can affect climate of an area, by latitude and longitude!
Explanation:
Hope this helps! Plz mark as brainliest! :)
Which of the following is an empirical formula?
will mark brainlyist
Answer:
I believe its the 3rd option
Explanation:
Answer:
Number 3
Explanation:
C3H8, C3H8 is an example of an empirical formula. It represents the relative number of atoms in the simplest ratio.
can acidic oxide react with acids?
If not, why?
Answer:
no
Explanation:
Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.
Answer:
The answer is no!
Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.
A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15.0 C. What will the volume of the balloon be if the temperature is increased to 80.0 C and the pressure remains constant? (Hint: Use the Charles law equation)
Answer:
The final volume of the balloon is 24.480 liters.
Explanation:
Let consider that no leakages occur in the balloon during the isobaric process and that helium behaves ideally. From Equation of State for Ideal Gases, we construct the following relationship:
[tex]V_{o}\cdot T_{o} = V_{f}\cdot T_{f}[/tex] (1)
Where:
[tex]V_{o}[/tex], [tex]V_{f}[/tex] - Initial and final volume, measured in liters.
[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Initial and final temperature, measured in Kelvin.
If we know that [tex]V_{o} = 30\,L[/tex], [tex]T_{o} = 288.15\,K[/tex] and [tex]T_{f} = 353.13\,K[/tex], the final volume of the balloon is:
[tex]V_{f} = \frac{V_{o}\cdot T_{o}}{T_{f}}[/tex]
[tex]V_{f} = 24.480\,L[/tex]
The final volume of the balloon is 24.480 liters.
What type of asexual reproduction do bacteria most commonly use?
Answer: Binary Fission
Explanation:
When a sound is louder what
measurement gets bigger?
Answer:
The bigger the amplitude is, the louder and more intense the sound.
A compound with molecular formula C6H9No that has an amide functional group and does not have an alkene group
Answer:
Following are the responses to the given question:
Explanation:
[tex]\to C_6H_9NO[/tex]
calculating the HOI:
[tex]= \frac{2C+2+N-H-X}{2} \\\\ =\frac{2\times 6+2+1-9-0}{2}\\\\ =\frac{12-6}{2}\\\\=\frac{6}{2}\\\\=3[/tex]
So, in the above compund there are three bounds or we can say that one is double and two bound is single.
Please find the attachment file of the Function group:
In the above given conditon compound doesn't include the alkene functional group that is absense of[tex]-C=C-[/tex] , and compound include [tex]-C\equiv C-[/tex] So, please find the attached file of the structure of the compound:
4. How Does Extreme conditions
accelerate erosion ?
Answer:
Explanation:
Geologic erosion influences soil formation and distribution. Accelerated erosion results from the removal of natural vegetation by human activities such as farming, ranching, forestry, and construction. The production of agricultural and forest products can be affected by excessive erosion
Most of the earth surface is covered with
what's the formula for bisonium dingodie chemical
26. Which compound, chloroacetic acid or iodoacetic
acid, most likely has the lower boiling point, and
why?
(A) Chloroacetic acid, because the London
dispersion forces among its molecules are
weaker
(B) Chloroacetic acid, because the dipole-dipole
forces among its molecules are weaker.
(C) Iodoacetic acid, because the London
dispersion forces among its molecules are
stronger.
(D) Iodoacetic acid, because the dipole-dipole
forces among its molecules are stronger.
The london dispersion forces are stonger in iodoacetic acid than chloroacetic acid making chloroacetic acid to have a lower boiling point.
What are london dispersion forces?The London forces are forces are intermolecular forces that act on compounds depending on the size of the molecule.
We must note that iodoacetic acid is a larger molecule than chloroacetic acid hence the london dispersion forces are stonger in iodoacetic acid than chloroacetic acid making chloroacetic acid to have a lower boiling point.
Learn more about boiling point: https://brainly.com/question/365923
If the pOH of a solution is 9.1, what is the concentration of OH- ions in that solution?
Answer:
7.9432*10^-10 or 10^-9.1
Explanation:
pOH=-log[OH]
Which of the following substances is a base?
5 points
a. Vinegar
b. Ammonia
c. Lemon juice
d. Distilled water
Answer:
Ammonia
Explanation:
hope this helps
How many protons are in Calcium - 41?
Answer:
the correct answer to your question is 20
1. What properties could we use to determine if a fluid is honey vs vinegar?
a.
b.
C.
d.
e.
What is TRUE about the element Fluorine?
It has the same number of protons, neutrons and electrons
It has more neutrons than electrons
It has a mass number of 9
It is an isotope
The atomic number is 19
Answer:
It has the same number of protons, neutrons and electrons
Explanation:
A neutral atom of non-isotopic fluorine should have 9 electrons, 9 protons and 9 neutrons.
How many grams are in 2.0 x 10-5 moles of uranium?
Answer choices
5.3 x 10-3 grams
4.8 x 10-3 grams
1.4 x 10-3 grams
2.2 x 10-3 grams
The mass of 2.0 x 10-5 moles of uranium is 4.8 x 10-3 grams.
What is molar mass?The molar mass of a substance is the mass of 1 mole of the substance.
The molar mass of uranium is 238 g.
This is the mass of 1 mole of uranium.
The mass of 2.0 x 10-5 moles of uranium = 238 g × 2.0 x 10-5
The mass of 2.0 x 10-5 moles of uranium = 0.00476 g = 4.8 x 10-3 grams
Therefore, the mass of 2.0 x 10-5 moles of uranium is 4.8 x 10-3 grams.
Learn more about molar mass at: https://brainly.com/question/18142599
Explain the law of mass and give an example that demonstrates it.
Answer:
it helps bring energy to earth
What does AS> O mean?
AS> 0 mean the system has become more random. This means that there is increase in entropy.
What is entropy?Entropy, in the realm of thermodynamics, quantifies the level of chaos or unpredictability within a system. A system characterized by heightened entropy exhibits greater disorder, whereas a system marked by diminished entropy reflects a higher degree of organization.
When AS > 0, it signifies an increase in the entropy of the system. This denotes a shift toward increased disorder or randomness within the system.
Learn about entropy here https://brainly.com/question/30402427
#SPJ1
Explain what is "Heredity".
is neon an example of a metal or nonmetal
Answer:
nonmetal
Explanation:
correcto answers only
What are some of the obstacles sperm face as they travel through the female reproductive system?
Answer:
well they have to get through the cooter without getting dissolved by acid or getting stuck in mucus. and they have to guess which tube they need to go into. then if they are luckys one nut will get to become child
Explanation:
Answer:
Some sperm get stuck in the lining of the uterus.
Others are destroyed by the female’s immune system.
Some of the sperm head down the wrong fallopian tube.
Explanation:
right on edg:) or you could use the other guys answer the comments are pretty funny
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Are all diatomic molecules non polar?
Convection currents slowly move tectonic plates across Earth
True or False?
Answer: True
Explanation: As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense.
2. How will damage to the adrenal medulla affect the individual? Select the best prediction(s).
A. Blood glucose will decrease
B. Blood glucose will increase
C. Respiration rate will decrease
D. Respiration rate will increase
E. Blood pressure will decrease
F. Appetite will increase
Answer:
F,A
Explanation:
How does warmer planet causes ice to melt and then cause the warm up even more?
Answer:
Melting ice causes more warming.
Because they are darker in color, the ocean and land absorb more incoming solar radiation, and then release the heat to the atmosphere. This causes more global warming. In this way, melting ice causes more warming and so more ice melts.
How many molecules are in 385 grams of CO2?
Answer:
8.748111203262969
Explanation:
The diagram shows a food web,
Mountain
lion
Deer
Hawk
Fox
Rabbit
Owl
Snake
Green
plant
Mouse
What is most likely to happen if the snake population is
wiped out?
The higher animals in the food chain would probably not survive.