Answer:
Neutral carbon-14 contains six protons, eight neutrons, and six electrons; its mass number is 14 (six protons plus eight neutrons). These two alternate forms of carbon are isotopes.
I hope it's helpful!
What is the chemical formula for the compound ammonium phosphate? Use the list of polyatomic ions and the periodic table to help you answer.
A.
NH4H2PO4
B.
(NH4)2PO4
C.
(NH4)3PO4
D.
(NH4)4PO4
Answer:
c. (NH4)3PO4
Explanation:
Answer:
c is the right answer
Explanation:
as we know ammonium is NH4
AND PHOSPHATE IS PO4-3
SO WHEN WE MIX THEM THEY BECOME
(NH4)3PO4
13. Which of the following shows the correct arrangement of the
levels of biological organization if arranged from smallest to largest
group?
a. tissue, organ, organ system, organism, cell,
community, population, biosphere
b. cell, tissue, organ system, organ, organism,
population, community, biosphere
tissue, cell, organ, organ system, organism,
biosphere, community, population
d. cell, tissue, organ, organ system, organism, population,
community, biosphere
Answer:
option D is correct answer of this question
1. The calendar below shows a sample month of the year. Suppose that you see a full moon on the first day of this month.
Draw and label a picture of the full moon on this day.
Draw and label a picture of the third quarter moon on the day you would expect to see it.
Draw and label a picture of the new moon on the day you would expect to see it.
Draw and label a picture of the first quarter moon on the day you would expect to see it.
Answer:The 1st Quarter Moon is a primary Moon phase when we can see exactly half of the Moon's surface lit up. ... The First Quarter Moon rises around midday and is visible in the day sky. ... when the Moon has reached the first quarter of its orbit around Earth, hence the name. ... Full Moon Names · Taking pictures of the Moon.
Explanation:
When sodium peroxide is added to water, sodium hydroxide and oxygen gas is produced.
Answer:
The reaction combines the sodium with the hydrogen and oxygen in water to form sodium hydroxide and hydrogen gas, and you get a lot of energy released as heat as well. This heat actually melts any remaining sodium that has not reacted yet, and ignites the hydrogen gas, so you get the bang and the flash.
Explanation:
Which electromagnetic wave has the shortest
wavelength? Describe the energy level and
frequency of this wave.
Answer:
The electromagnetic spectrum
Explanation:
ranges from gamma (γ) radiation, which has the shortest wavelength, highest frequency, and greatest energy
please help
find molecular formula of a compound with a molar mass of 45.0 g/mol and an empirical formula of CH3
Answer: The molecular formula will be [tex]C_3H_9[/tex]
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
The empirical formula is [tex]CH_3[/tex]
The empirical weight of [tex]CH_3[/tex] = 1(12)+3(1)= 15g.
The molecular weight = 45.0 g/mole
Now we have to calculate the molecular formula:
[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{45}{15}=3[/tex]
The molecular formula will be=[tex]3\times CH_3=C_3H_9[/tex]
Thus molecular formula will be [tex]C_3H_9[/tex]
Which action could cause a sample of liquid to boil?
A. Decreasing the temperature of the liquid
B. Decreasing the sample size of the liquid
C. Decreasing the pressure on the liquid
D. Decreasing the volume of the liquid
Hurry please
Answer:
B
Explanation:
Decreasing the sample size of the liquid
hope it helps!
Electron dot diagram for four elements are shown. Which element would be found in Group 13?
Answer:
D. 1
Explanation:
Just took it :)
The element that would be found in Group 13 is
D. 1
The electron dot structure has three valence electrons.
Group-13 elements:
Group-13 is also known as the Boron family. This group belongs to p-block elements. The elements of this group will have three electrons in their outermost shell i.e. 3 valence electrons.
Example: Boron has atomic number 5.
Electronic configuration of Boron: [tex]1s^2 2s^2 2p^1[/tex]
Thus, the electron dot structure for group-13 is option D i.e. 1.
Find more information about Group-13 elements here:
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The maximum and minimum oxidation state that can be shown by iodine respectively is
A. +3, -1
B. +7, -1
C. +5, 0
D. +1, 0
Answer:
B -1 and +7
Explanation:
Iodine shows oxidation states of −1, +1, +3, +5, or +7.
Why do elements form lons? In other words, why do elements gain or lose electrons? Be specific.
Answer: Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion. Energy is released when an atom gains valence electrons and forms a negative ion
Which of these is NOT a type of chemical reaction?
a
b
Synthesis
Decomposition
Single Replacement
The Mole
C С
d
PbSO4 -> PbSO3 + O2 type of reaction
Answer:
Decomposition
Explanation:
This shows a compound splitting into two
By definition, PbSO₄ → PbSO₃ + O₂ is a decomposition reaction, because a single substance decomposes producing two different substances.
First, you have to know that in a decomposition reaction, a single substance decomposes, producing two or more different substances. That is, in this type of reaction, two or more substances are formed from a compound.
The atoms that make up a compound are separated to give the products according to the formula:
AB → A + B
This type of reaction can occur spontaneously or caused by certain external factors, such as heat, which promote the decomposition of the molecule into simpler substances.
In this case, it is possible to observe that PbSO₄ → PbSO₃ + O₂ is a decomposition reaction, because a single substance decomposes producing two different substances.
Learn more:
https://brainly.com/question/8009068?referrer=searchResultshttps://brainly.com/question/24905694?referrer=searchResultshttps://brainly.com/question/13134296?referrer=searchResultsUnit 2 Test
What makes up all of the populations in an area?
they
O Niche
Habitat
Ecosystem
Community
What is the mass in grams of a 10.2cm3 block of copper
Answer:
91.4
Explanation:
Givens
d = 8.96
v = 10.2 cm^3
m =?
Formula
d = m / V
Solution
8.96 = m / 10.2 Multiply both sides by 10.2
8.96 * 10.2 = m
m = 91.392 grams
m = 91.4 grams rounded.
A student calculated the number of moles of carbon dioxide to be 0.30 moles in a 200.0 g sample of a gaseous mixture. What is the percent composition of carbon dioxide? (molar mass = 44.01 g/mol)
A. 0.066%
B. 13%
C. 30%
D. 6.6%
Considering the definition of percentage by mass, the correct answer is option D. the percent composition of carbon dioxide is 6.6%
Percentage by massThe percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.
In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:
[tex]percentage by mass=\frac{mass of solute}{mass of solution} x100[/tex]
Percent composition of carbon dioxideIn this case, you know:
mass of solute= 0.30 moles × [tex]\frac{44.01 grams}{1 mole}[/tex]= 13.203 grams (being 44.01 [tex]\frac{grams}{mole}[/tex] the molar mass of carbon dioxide)mass of solution= 200 gramsReplacing in the definition of percentage by mass:
[tex]percentage by mass=\frac{13.203 grams}{200 grams} x100[/tex]
Solving:
percentage by mass= 6.60 %
Finally, the correct answer is option D. the percent composition of carbon dioxide is 6.6%
Learn more about percentage by mass:
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Sulfuryl chloride decomposes at high temperatures to produce sulfur dioxide and chlorine gases:
SO2Cl2(g) = SO2(g) + Cl2(g)
At 375°C the equilibrium constant Kc is 0.045. If there are 2.0 grams of sulfuryl chloride, 0.17 gram of sulfur dioxide, and 0.19 gram of chlorine present in a 1.0 Liter flask.
a. What is the value of the reaction quotient?
b. Is the system at equilibrium?
c. In which direction will the system move to reach equilibrium?
Answer:
[SO2Cl2] = = 0.015 M [SO2] = = 0.0027 M [Cl2] = = 0.0027 M Q = = = 4.8 × 10−4
No. Q < Kc, so reaction will shift to the right.
Explanation:
10. Maslow refers to the stage where one reaches his or her full developmental potential as (1 point)
O belongingness.
O esteem.
O self-actualization.
O physiological
Answer: self-actualization (C)
Explanation:
it’s at the top of the hierarchy of needs.
1. In preparing his speech for a youth association, Eric considers the demographics and other important information about the people who will be listening to him speak. Like all successful speakers, Eric is engaging in the process of
C. Analyzing the audience
2. To gather formal information about audience members' attitudes, beliefs, and values, you can
D. ask open-ended and closed ended question on a survey
3. Debbie planned a speech calling for higher student fees. She thought about how her audience might react to this message. She prepared a survey and asked a group of her classmates to take it. What kind of audience analysis did Debbie use?
C. Formal
4. Why is audience analysis important?
A. It helps you understand the audience as much as possible before giving your speech
5. The audience's educational level is a factor related to
B. demographics
6. A speaker that collects information about the audience, evaluates what has been collected, and adapts his or her speech using that information is considered a(n) _____ speaker
B. Audience-centered
7. Maslow refers to the stage where one reaches his or her full developmental potential as
C. self-actualization
8. Which of the following is a method of collecting informal data about your audience?
D. observing the audience
9. Sara is preparing a speech to endorse a political candidate. She uses the information she gathered about her audience to determine their vales, beliefs, and attitudes so she can better prepare her speech. Sara is conducting which type of analysis?
A. Psychographic analysis
10. As you learn more about the audience, you are able to identify the beliefs, values, and attitudes of the audience. This is known as
B. Psychographics
I hope this helps!
What is the answer helpnme plz
CAN SOMEONE PLEASE CHECK MY ANSWER FOR QUESTION 2
If it’s wrong please correct me
Thank you!!!
Answer:
It looks right to me make sure you have sig figs if the question asked for it though so you smalles figure would be 3 so with sig figs your answer would be 1190cm3
When the moon changes from all dark to all light, or from new moon to full moon, the moon is said to be...
changing shape
waxing
waning
gibbous
Answer:
i think its changing shape if I'm wrong I'm sorry
Please can you help me from 1 to 6
Answer:
um
Explanation:
help you? you mean do it for you? nah man you can just use the calculator ;)
how many grams of Ca(OH)2 are needed to produce 500ml of 1.66 M Ca(OH)2 solution
Pls help!!
1000 L of nitrogen and 2400 L of hydrogen are mixed to produce ammonia. The volume of ammonia produced is
A. 1200 L
B. 1000 L
C. 2400 L
D. 1600 L
Answer: D. 1600 L
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}[/tex]
[tex]\text{Number of moles of nitrogen}==\frac{1000L}{22.4L}=44.6moles[/tex]
[tex]\text{Number of moles of hydrogen}==\frac{2400L}{22.4L}=107.1moles[/tex]
[tex]N_2(g)+3H_2(g)\rightarrow 2NH_3(g)[/tex]
According to stoichiometry :
3 moles of [tex]H_2[/tex] require 1 mole of [tex]N_2[/tex]
Thus 107.1 moles of [tex]H_2[/tex] will require=[tex]\frac{1}{3}\times 107.1=35.7moles[/tex] of [tex]N_2[/tex]
Thus [tex]H_2[/tex] is the limiting reagent as it limits the formation of product and [tex]N_2[/tex] is the excess reagent.
As 3 moles of [tex]H_2[/tex] give = 2 moles of [tex]NH_3[/tex]
Thus 107.1 moles of [tex]H_2[/tex] give =[tex]\frac{2}{3}\times 107.1=71.4moles[/tex] of [tex]NH_3[/tex]
Volume of [tex]NH_3=moles\times {\text {Molar volume}}=71.4moles\times 22.4L/mol=1600L[/tex]
Thus volume of ammonia produced is 1600 L
can someone answer a and b to the file attached?
Explanation:
The equation of the reaction is given as;
12C + 16 H2 --> 4 C3H8
a. Simplify the equation;
The coefficients are 12, 16 and 4.
4 is a common factor, so divide all through by 4.
12/4 = 3, 16/4 = 4, 4/4 = 1
The equation is given as;
3 C + 4 H2 --> C3H8
b. If 21 moles of C3H8 are formed, how many moles of C was needed.
From the reaction;
3 mol C atoms reacts to form 1 mol of C3H8
x mol would react to form 21 moles of C3H8
3 = 1
x = 21
x = 21 * 3
x = 63 moles
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2
What are the reactants and products also add why
MARKING BRAINLIEST
Choose the products that complete the reaction. The chemical equation may not be balanced.
NaHCO3 + HC2H3O2
Answer: NaC2H3O2 + CO2 + H2O
I have multiple stochiometry questions; could someone please help me out and give an explination? I'd greatly appreciate it, and I'll give brainliest to whoever helps me out! ^^
Answer 1- 233.07
Answer 2- 491.07
Answer 3 - 6.05
Answer 4 - 28.02
5. If all the particles in a material are made up of
several smaller particles, and every larger particle
is identical, is the material a pure substance or
not? Explain your reasoning.
Plz answer correctly.. I need it ASAP
If all the particles in a material are made up of
several smaller particles, and every larger particle
is identical, is the material a pure substance or
not? Explain your reasoning.
A pure substance is something like a compound and element. This material made of several particles which seem to be two different particles, I believe, is a mixture. So, it is not a pure substance mixtures are made up of more than one particle while compounds (In a fixed ratio, the fusion of two or more than two atoms) and elements are made up of one molecule essentially.
The given material is not a pure substance as it is made up of several smaller particles and some larger particles that are identical.
What is pure substance?A pure substance is defined as a substance that has fixed chemical composition throughout the substance. A pure substance are not necessarily have to be of single substance or compound.
The given material is not a pure substance because it is made up of several different small particles. The material is made up of both small particle and large particles and both the particle do not have similar composition.
A pure substance is a homogeneous mixture. These substance has similar composition throughout the substance size of the particle does not matter.
Thus, it is not a pure substance as it is made up of several smaller particles and some larger particles that are identical.
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10) Calculate the energy change for the formation of LiCl(s) from its elements in their standard states and the following tabulated information: ?
1 Li(s) + 1/2 C12(s) — LiCl(s)
2 Li+(g) + Cl-(s) -- LiCl(s)
3 Li(s) — Li(g)
4 1/2 Cl2(g) - Cl(g)
5 Cl(g) + e- →Cl-(3) Li(g) → Lit(g) + e-
1-853 kJ/mol
2+159.4 kJ/mol
3+121.7 kJ/mol
4-348.6 kJ/mol
5+520.2 kJ/mol
A) +1305.7 kJ/mol
B) +296.9 kJ/mol
C) -400.3 kJ/mol
D) -627.2 kJ/mol
Answer:
-400.3 kJ/mol
Explanation:
How does the rate of temperature change depend on the temperature difference of the two beakers?
Answer:
give it your all but know your limits
Explanation:
a sample of nitrogen gas occupies 1.55l at 27.0c and 1.00 atm what will the volume be at -100.0c and the same pressure
V₂=0.894 L
Further explanationGiven
V₁=1.55 L
T₁=27 + 273 = 300 K
P₁=1 atm
T₂=-100+273 = 173 K
Required
The final volume(V₂)
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₂=V₁T₂/T₁
V₂=1.55 x 173/300
V₂=0.894 L