hi there bestie [i think its 3]
What is the charge of Mn in MnO4- ?
Answer: +7
Explanation: Sum of all the oxidation numbers in a polyatomic ion is equal to the charge on the ion. Thus, the total charge on the polyatomic anion is −1. Thus, the oxidation number of Mn in MnO−4 is +7.
B. Radiation
D. roasting
How do vibrations of particles behave when sounds travel through solids?
A occurs fast
C. occurs moderately
B. occurs very slowly
D. cannot be determined
What is the amount of space that a material takes up ?
volume.
The amount of space a material occupies is its volume.
Mass is measured using a scale. Volume is the amount of space matter takes up. Volume can be measured by multiplying the length, width, and height of an object, or by using a measuring cup and seeing how the measurement of water changes in a cup. Density is the amount of matter an object has in a certain space.
Answer:
Volume
Explanation:
Mass is measured using a scale. Volume is the amount of space matter takes up. Volume can be measured by multiplying the length, width, and height of an object, or by using a measuring cup and seeing how the measurement of water changes in a cup. Density is the amount of matter an object has in a certain space.
Experiment: Select the DATA tab, and check that every species is selected. Click Advance year 10 times. Which fish populations increased, and which fish populations decreased?
arts Per Thousand ... Click advance year 10 times. ... Which organism was most hurt by increased storms, and why do you think this is so? ... On the Coral Reef tab I see less fish and on the Data tab I see Staghorn Coral has majorly decreased. ... B. How does this change the populations of the two species that eat algae, ...
Answer:
increase: yellow tail snapper
decrease: grouper, parrotfish, angelfish
Explanation:
What happens when a current is applied to two electrodes immersed in pure water?
A. No electrolysis occurs, and current does not flow.
B. Oxygen, but not hydrogen, is released as a gas.
C. Electrolysis occurs, releasing oxygen and hydrogen gas.
Answer:
b
Explanation:
Gucci ghhvhjhsgjjn hvh
Answer:
B
Explanation:
Butene would have __ carbon atoms and a __ bond
Answer:
Butene would have 4 carbon atoms and a double bond.
Explanation:
The chemical formula for butene is C[tex]_4[/tex]H[tex]_8[/tex]
Here is an image of it.
Answer:
we have
But :4
bond :ene :2
So
Butene would have _4_ carbon atoms and a _2_ bond
In making her morning tea, Dorothy drops a sugar cube into some hot water. She stirs the mixture but no longer sees the sugar cube at the bottom of her mug. Based on her observation of sugar dissolving in hot water, she can properly conclude that the sugar is
Answer:
Hydrophilic
Explanation:
A hydrophilic substance is any substance that interacts efficiently with water.
Since water is a polar solvent, a hydrophilic substance must also be polar in order to interact with water since like dissolves like in chemistry.
The fact that sugar disappears in hot water indicates that sugar is a polar hydrophilic substance because only a polar solute can dissolve in water
Based on her observation of sugar dissolving in hot water, she can properly
conclude that the sugar is hydrophilic.
A substance is said to be hydrophilic when it is able to react and dissolve in
water due to the attractive force between them. Hydrophobic substances
don't dissolve in water.
In this scenario, we were told the sugar dissolved completely in water which
means that the sugar is hydrophilic.
Read more on https://brainly.com/question/1600542
Which of the following relationships is true?
A. pH − pOH = 14
B. Ka × Kb = 1 × 10-14
C. pKa × pKb = 14
D. pKa × pKb = 1 × 10-14
Answer:
D. pKa × pKb = 1 × 10-14
Explanation:
hope this helps, if not, give me time to edit
Answer:
B. Ka × Kb = 1 × 10-14
Explanation:
yw
helium gas (He) effuses ___ times faster than methane (CH4)
a. 1.80
b. 2.00
c. 2.20
d. 2.40
Answer:
b 2.00
Explanation:
I am pretty sure that is right
Which of the following is NOT a type of mucle tissue?
Cardiac
Smooth
Striped
Skeletal
Answer:
Striped should be the answer
Mg + 2HCl → MgCl2 + H2
How many grams of Mg is needed to produce 100 g of H2?
H2
n=m÷Mr
n=100×2
n=200 moles
Mole ratio
Mg : H2
1 : 1
x : 200
cross multiply= x=200
Mg
make m the subject
m=n×Mr
m=200×24.305
m=4861 g
what are 2 factors that impact the flow of energy into and out of earths systems
Answer:
Solar energy causes evaporation; uneven heating of the Earth causes air masses to move; Coriolis forces help storms to take shape; and gravity makes rivers flow downhill. Another relevant factor is the high heat capacity (or specific heat) of water.
Explanation:
hoped this helped;)
two ways the rate of a reaction be monitored
Answer: If a reaction produces a gas such as oxygen or carbon dioxide, there are two ways to measure the reaction rate: using a gas syringe to measure the gas produced, or calculating the reduction in the mass of the reaction solution.
Explanation:
https://courses.lumenlearning.com/introchem/chapter/measuring-reaction-rates/#:~:text=If%20a%20reaction%20produces%20a,mass%20of%20the%20reaction%20solution.
This is the site I got it from. I hope this helps.
A neutral atom has a ground state electron configuration of 1s22s22p63s2.The neutral atom becomes an ion during a chemical reaction.Which is the most likely charge of the ion
Answer:
+2
Explanation:
the atom will acquire the noble gas configuration if it loses 2 electrons, becoming a divalent cation
If we were to add a piece of solid Cu to an aqueous solution (in water) of silver nitrate, the Silver would be replaced in a single replacement reaction forming aqueous copper (II) nitrate and solid silver. How much silver, in grams, is produced if 15.00 grams of Cu is added to the solution of silver nitrate
Answer:
50.9 g of Ag
Explanation:
Reaction is:
Cu (s) + 2AgNO₃(aq) → 2Ag (s) + Cu(NO₃)₂ (aq)
1 mol of Cu react to 2 moles of silver nitrate in order to produce 2 moles of solid silver and 1 mol of copper (II) nitrate.
We assume, the silver nitrate in excess.
We determine moles of copper → 15 g . 1mol / 63.55 g = 0.236 moles
Ratio is 1:2. 1 mol of copper produce 2 moles of silver
0.236 moles of Cu will produce (0.236 . 2) / 1 = 0.472 moles of Ag
We deterine mass of silver:
0.472 mol . 107.87 g /mol = 50.9 g
Hii! i’m timed so can someone please answer quickly!
What is the frequency of this wave? 1,2,3, or 4
I cant find any answers to this question! i really appreciate it!
Count the in between joint bunches of curve lines .
First one at beginninglast one at end .And one is in middleFrequency is 3-1=2
What must happen to uranium before it can be used as a fuel source?
A. No changes are necessary.
B. Stable U-235 must be enriched with 3% radioactive U-238.
C. Stable U-238 must be enriched with 3% radioactive U-235.
D. Unstable U-235 must be enriched with 5% U-238 to stabilize it.
Answer:
D
Explanation:
Before it can be used in a reactor for electricity generation, however, it must undergo a series of processes to produce a useable fuel. For most of the world's reactors, the next step in making the fuel is to convert the uranium oxide into a gas, uranium hexafluoride (UF6), which enables it to be enriched.
Unstable U-235 must be enriched with 5% U-238 to stabilize it. Hence, option D is correct.
What is radioactive?Radioactivity is the phenomenon of the spontaneous disintegration of unstable atomic nuclei into atomic nuclei to form more energetically stable atomic nuclei.
Before uranium can be used in a reactor for electricity generation, however, it must undergo a series of processes to produce a useable fuel.
For most of the world's reactors, the next step in making the fuel is to convert the uranium oxide into a gas, uranium hexafluoride (UF6), which enables it to be enriched.
Hence, option D is correct.
Learn more about radioactive here:
https://brainly.com/question/1770619
#SPJ2
which statement best describes the difference between weather and climate
a) climate is about the hydrospace, weather is about autosphere
b) climate describes average temperature, weather describes many more factores
c) Climate is long periods of time, weather is short periods of time ( present day)
d) Climate describes conditions at sea level, weather describes conditions at different elevations
WILL MARK BRIANLIEST
Answer:
C
Explanation:
Brainliest
I tried my best
which type of bonding involves sharing valence electrons, but the valence electrons aren't confined to a specific region between atoms and instead exist throughout the crystal structure of the material?
Answer:
metallic bonding
Explanation:
Metallic bonding is bonding where electrons exist as "sea of electrons" meaning they can go anywhere in the structure and are not localized in specific place like covalent bonds are sometimes.
HELP ASAP
Which of these atoms ihas the HIGHEST reactivity?
Answer:
aaaaaaaaaaaaaaaaaaaaaaaaassaaaa
how many moles are 2.54 x 10^29 molecues of H2O
Answer:
[tex]\boxed {\boxed {\sf 421,786.7818 \ mol \ H_2O}}[/tex]
Explanation:
We are asked to convert from molecules of water to moles.
1. Avogadro's Number1 mole of any substance contains the same number of particles (atoms, molecules, formula units, etc). This is Avogadro's Number: 6.022*10²³. In this problem, the particles are molecules of water.
2. Convert Molecules to MolesUse Avogadro's Number to make a ratio.
[tex]\frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Multiply by the number of molecules given: 2.54 *10²⁹
[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Flip the ratio so the units of molecules of water cancel.
[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} \ molecules \ H_2O}[/tex]
[tex]2.54 *10^{29} \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} }[/tex]
Condense the problem into 1 fraction.
[tex]\frac {2.54 *10^{29} }{6.022 *10^{23} }\ mol \ H_2O[/tex]
[tex]421786.7818 \ mol \ H_2O[/tex]
2.54 *10²⁹ molecules of water are 421, 786.7818 moles of water.
What is the electron configuration of the sodium atom after it loses an electron?
Multiple choice question.
A)
1s22s22p6
B)
[He]2s22p5
C)
1s22s22p63s1
D)
1s22s22p63s1
Answer:
the answer is A 1s22s22p6
If 5.60 mol of a substance releases 14.9 kJ when it decomposes, what is ΔH for the process in terms of kJ/mol of reactant?
Answer:
The correct approach is "-2.67 kJ/mole". A further solution is described below.
Explanation:
The given values are:
No. of moles,
= 5.60 mol
Substance releases,
ΔH = 14.9 kJ
Now,
The ΔH in terms of kJ/mol will be:
= [tex]\frac{\Delta H}{5.60}[/tex]
On putting the given values of ΔH, we get
= [tex]\frac{-14.9}{5.60}[/tex]
= [tex]-2.67 \ kJ/mole[/tex]
Hurry please need fast
In the following chemical phrase how many moles of O are there? 6
C2H602* 2
6
12
3
Which is not an example of a
parasite/host relationship?
A flea on a dog
A tick on a horse
A toad on a lily pad
A barnacle on a whale
Answer:
A toad on lily pad
Explanation:
have a great day
Water and phosphorus with a total mass of 200 grams are added to a flask like the one below and then the flask is sealed with a rubber stopper. The flask is then heated up so that a reaction occurs but no gas from the reaction escapes the flask. How much mass would you expect to be in the flask after the reaction occurs
Answer:
h20 o3vbjbxhnnhbnkknnchemesry
The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. The total mass will be 200g in the flask after the reaction occurs.
What is law of conservation of mass?According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier. Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved.
The total mass of reactant water, phosphorous is 200g, then the total mass of product will remain same after reaction according to law of conservation of mass.
Therefore, the total mass will be 200g in the flask after the reaction occurs.
To know more about law of conservation of mass, here:
https://brainly.com/question/28711001
#SPJ5
3.) If you have 784 g of Sulfuric Acid (H2SO4), how many moles of Sulfuric
Acid is that? *
Answer:
98.07848
Explanation:
I assume you are converting between grams H2SO4 and mole. You can view more details on each measurement unit: molecular weight of H2SO4 or mol This compound is also known as Sulfuric Acid. The SI base unit for amount of substance is the mole.
Answer:
8moles
Explanation:
n=m/GFM
n=784/98.02
n=7.998
n=8moles
Use the information provided in the table to
determine the K, for methylammonium ion, the
conjugate acid of methylamine.
X6.8 x 10-19
4.4 x 1010
2.8 x 109
2.3 x 10-11
Answer: D
Explanation:
2.3x10-11
Answer:
D. 2.3 x 10^-11
Explanation:
Look at the image below
Look at the diagram below. According to the diagram, what substance(s) are the
reactant(s)? What substance(s) are the product(s)? Explain your reasoning.
NH3(aq) + HCI (aa)
Ammonia Hydrochloric acid
NHCI (aa)
Ammonium chloride
You will be graded on the following rubric:
luje
Answer:
NH3(aq) and HCl(aq) are the reactants, while NH4Cl(aq) is the product.
Explanation:
The hydrogen atom from the HCl molecule joins the other three in NH3 creating a four hydrogen molecule, NH4Cl.
____Al+____O2 → ____Al2O3
Which of the following sets of coefficients would correctly balance the equation and why?
A. 2, 2, 2; because you must use the same coefficient for each substance.
B. 2, 3, 2; because you must have the same number of atoms on each side of the equation.
C. 4, 3, 2; because you must have the same number of compounds on each side of the equation.
D. 4, 3, 2; because you may have the same number of atoms on each side of the equation
Answer:
D
Explanation:
You balance an equation so that all the elements have the same number of atoms on each side of the equation.