The volume at STP is 12.9L.
What symptoms are caused by radon gas?
Possible symptoms include shortness of breath (difficulty breathing), a new or worsening cough, pain or tightness in the chest, hoarseness, or trouble swallowing. If you smoke and you know you've been exposed to high levels of radon, it's very important to quit smoking.
What is the primary reason for radon gasoline in the home?It comes from the natural decay of uranium which is determined in nearly all soils. It typically moves up via the floor to the air above and into your private home through cracks and other holes in the basis. your home traps radon inner, which it is able to build up.
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The nutrition label shows the total amount of carbohydrates in grams. One gram of carbohydrates provides four calories of energy.
For this food, the number of calories obtained from carbohydrates is
.
Answer:
Dude you need to provide an image because almost everyone is not gonna know what u talkin about.
Explanation:
Core electrons shield what from the pull of the nucleus?
A. Identical electrons
B. Neutrons
C. Valence electrons
D. Protons
Answer:
C. Valence electrons
Explanation:
Please mark my answer as brainliest, I would appreciate it.
:)
Consider phosphoric acid, H3PO4. What is the total number of moles of H+ available for reaction in 4.50 L of 0.750 MH3PO4? Write your answer as a numerical value without any units. Type your numeric answer and submit
Which of the following best describes the difference between a mixture and a pure substance? A. A mixture has the same properties throughout; a pure substance has the different properties throughout. B. A mixture has different properties throughout; a pure substance has the same properties throughout A mixture is made up of only one type of atom; a pure substance is made up of more than C. one type of atom. A mixture is made up of more than one type of atom; a pure substance is made up of only D. one type of atom.
Answer:
B. A mixture has different properties throughout; a pure substance has the same properties throughout
Explanation:
We have two classes of substances which are pure and impure substances.
Pure substances are elements and compounds
Impure substance are simply mixtures.
Mixtures have the following properties;
Their composition is indefinite i.e. they consist of two or more elements and or compounds in any proportion by mass. Constituents retain their identities i.e. physical properties are retained. Constituents react differently to changed conditionsThey can easily be separated by physical methods.Which is the order of these solutions from strong acid to strong base?
Solutions:
household ammonia
battery acid
baking soda
stomach acid
antacid
A-stomach acid household ammonia battery acid antacid baking soda
B-battery acid stomach acid antacid baking soda household ammonia
C-battery acid stomach acid baking soda antacid household ammonia
D-stomach acid battery acid antacid baking soda household ammonia
Answer:
First is battery acid with a pH of 1, second is stomach acid with a pH of 1.5-3.5 (depends), third is antacid with a pH of 7, fourth is baking soda with a pH of 9, and finally, fifth is household ammonia with a pH of 11.
Here is a picture of the pH levels to better help you understand.
Answer:
b
Explanation:
What is the atomic radius
Answer:
The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.
When circumstances are right, most materials undergo a process called thermal expansion. Which statement best describes the cause and effect of thermal expansion? Group of answer choices Matter is heated, and its particles spread out more. Matter is heated, and its particles move closer together. Matter is cooled, and its particles move closer together. Matter is cooled, and its particles spread out more.
Answer: Matter is heated, and its particles spread out more
Explanation:
Thermal expansion occurs when there's an expansion of an object or material or when an object becomes bigger because of a rise in its temperature. This brings about the faster movement of the heated molecules and the atoms spreading out.
Therefore, the cause and effect of thermal expansion will be that when matter is heated, and its particles spread out more.
Can anyone solve this?
Answer:
3P2O5:
P:6 O:15
5CO2
C:5 O:10
3C6H12O6
C:18 H:36 O:18
4C6H12
C:24 H:48
3Mg3(PO4)2
Mg:9 P:2 O: 8
4(NH4)2S
N:8 H:32 S:4
Can someone plz help-
Answer:
The answer is 3 :)
Answer: 3. a bottle that was broken into many small pieces
Can you please answer this for me please?
Which form of energy is stored chemical energy and example of?
A. Kinetic energy
B. Potential energy
C. Gravitational energy
D. Powered energy
WARNING: Sorry I'm only in 5th grade so if you see my level as collage I had to put that because it would not let me put anything else
Answer:
Well its B im sorry if im wrong.
Explanation:
Give the names of the elements combined in barium sulfide.
Answer:
Barium and sulpher are the elements that forms barium sulphide .
And its molecular fomula is BaS.
Explanation:
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, in barium sulfide, barium and sulfur elements are present.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. In barium sulfide, barium and sulfur elements are present. The molecular formula of the compound is BaS.
Therefore, in barium sulfide, barium and sulfur elements are present.
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A 10 gram sample of iron reacts with oxygen to form 18.2 grams of ferric oxide. How many grams of oxygen reacted?
Answer:
[tex]\boxed {\boxed {\sf 8.2 \ grams}}[/tex]
Explanation:
According to the Law of Conservation of Mass, the mass of the products must equal the mass of the reactants.
mass products = mass reactantsIn this problem, the reaction is:
[tex]iron + oxygen = ferric \ oxygen[/tex]
The reactants are iron and oxygen. We know the mass of the iron sample is 10 grams. The product is ferric oxide. The mass of the ferric oxide sample is 18.2 grams.[tex]10 \ g + oxygen=18.2 \ g[/tex]
We want to find how many grams of oxygen reacted. We have to get the oxygen by itself. 10 is being added to oxygen. The inverse of addition is subtraction. Subtract 10 from both sides of the equation.
[tex]10 \ g - 10 \ g+ oxygen = 18.2 \ g - 10 \ g[/tex]
[tex]oxygen= 18.2 \ g - 10 \ g[/tex]
[tex]oxygen= 8.2 \ g \\[/tex]
8.2 grams of oxygen reacted with 10 grams of iron to form 18.2 grams of ferric oxide.
The density of a gas is 1.35 L what is the volume of the gas when the mass is 12.5 g
Answer:
9.26 LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{12.5}{1.35} \\ = 9.259259...[/tex]
We have the final answer as
9.26 LHope this helps you
What is the systematic name of the following compound?
KBr
Choose 1 answer:
Krypton bromide
Krypton(1) bromide
Potassium(1) bromide
Potassium bromide
Answer: D. Potassium bromide
1. What is a wave?
a.) a vibrating disturbance that transfers energy from place to place
b.) a material which a wave travels through
c.) an area where coils spread out
d.) the maximum distance a medium moves from its rest position
Answer:
A.
Explanation:
A wave is a disturbance that moves energy from one place to another. Only energy — not matter — is transferred as a wave moves. The substance that a wave moves through is called the medium. That medium moves back and forth repeatedly, returning to its original position. But the wave travels along the medium
What is the name for the group of unreactive elements on the periodic table?
Noble Gases, at least that's what I was told. Hope that helps.
What pH scale number represents a neutral.
What pH scale number represents a neutral.
The answer is 7
Which two molecules are broken down in your cells during cellular respiration? Whoever is correct gets thanks and brainliest
Answer:
glucose and oxygen
Explanation:
Cellular respiration is the aerobic process by which living cells break down glucose molecules, release energy, and form molecules of ATP. Overall, this three-stage process involves glucose and oxygen reacting to form carbon dioxide and water.
A scientist claimed that he radiocarbon dated a fossilized skull of a dinosaur and found it to be about 63 million years old. Do you support his claim? Provide at least one scientifically based reason why you do or do not support the claim.
Answer:Since dinosaurs are thought to be over 65 million years old, the news is stunning - and more than some could tolerate. After the AOGS-AGU conference in Singapore, the abstract was removed from the conference website by two chairmen because they could not accept the findings. Unwilling to challenge the data openly, they erased the report from public view without a word to the authors. When the authors inquired, they received this letter:
Explanation:
i do not own my copyrights
How many moles of O2 are needed to burn 2.56 moles of CH3OH?
Answer:
[tex]n_{O_2}=3.84molO_2[/tex]
Explanation:
Hello!
In this case, since the combustion reaction of methanol is:
[tex]CH_3OH+\frac{3}{2} O_2\rightarrow CO_2+2H_2O[/tex]
In such a way, since there is 1:3/2 mole ratio between methanol and oxygen, we can compute the moles of oxygen that are needed to burn 2.56 moles of methanol as shown below:
[tex]n_{O_2}=2.56molCH_3OH*\frac{\frac{3}{2}molO_2}{1molCH_3OH} \\\\n_{O_2}=3.84molO_2[/tex]
Best regards!
Difference between Electron Proton and Neutron?
Answer:
protons-positively charged
neutrons-uncharged
electrons- negatively charged
The differences are protons give out a positive charge neutrons are neutral and electrons give out negative charge.
Another one is the fact they are located on specific separate parts of an atom and each atoms consists a different amount each charge hope this helped :)
Iron(III) nitrate + potassium sulfide product names
Four students rolled a ball down a slide on the play ground which ball has the greatest applied force
If 2.68 g of benzaldehyde are involved with the mixed aldol condensation reaction, how many moles of benzaldehyde are present? Round your answer to the correct number of significant figures. (reaction has 2:1 mole ratio) 1 acetone is reacted with 2 benzaldehyde
Answer:
The number of moles of benzaldehyde = 0.0253 moles
Explanation:
The molecular formula of benzaldehyde is C₇H₆O
Its molecular mass is calculated from the atomic masses of the constituent atoms.
C = 12.0 g: H = 1.0 g; O = 16.0 g
Molecular mass = ( 12 * 7) + (1 * 6) + (16 * 1) = 106.0 g/mol
Number of moles of substance = mass of substance/ molar mass of the substance
mass of benzaldehyde = 2.68; molar mass = 106.0 g/mol
Number of moles of benzaldehyde = 2.68 g/ 106 g/mol = 0.0253 moles
Therefore, the number of moles of benzaldehyde = 0.0253 moles
Which of the following is true if the net force on an object is zero? (1 pt) a. The object must be at rest. b. The object’s speed will decrease. c. The object’s speed will increase. d. The object’s direction of motion can change, but its speed will not. e. None of the above.
Explanation:
the object must be at rest
What are four the main causes of erosion? wind, water, ice, gravity O biological, chemical, mechanical, subterranean O freezing, hydration, oxidation, salt crystallization O seismic movement, vocalism, mountain building, ocean waves
Answer:
Water, wind, ice, and gravity
Explanation:
I took the quiz ;)
Who asked the question “can you split matter forever?”
Answer:
Of course, what we today call atoms can be divided into more elementary particles, but not that many.
Explanation:
how many elements are found in the third period. A.2 B.18 C.8 D.32
Answer:
8
Explanation:
u can find it on ur chemistry book
Answer:
C. 8
Explanation:
Check chemistry textbook
What is the degree of oxidation of a simple substance
Answer: The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.
hope this helps........ Stay safe and have a Merry Christmas!!!!!!!!! :D Explanation:
What is the trend in atomic radius as you go across a period
Answer: Atomic radius decreases across a period and increases down a group.