Answer:
B -1 and +7
Explanation:
Iodine shows oxidation states of −1, +1, +3, +5, or +7.
A chemist weighed out 2.9 g of nickel. Calculate the number of moles of nickel she weighed out. Be sure your answer has the correct number of significant digits.
Answer:moles = 2.9 g Ni × 1 mol Ni 58.69 g Ni = 0.0663 mol Ni
HELP HELP HELP HELP HELP HELP HELP HELP HELP
Answer:
3
Explanation:
I got this i am very smart
Answer:
The answer is 3) same mass more volume
Explanation:
Mass measures the amount of matter in a substance or an object.
Volume measures the amount of space that a substance or an object takes up.
Alleles are different forms of ribosomes.
1 point
A. True
B. False
Answer:
true
Explanation:
i did the test
Answer: False
Explanation:
Balance the following
Mn(NO2)2
+
BeCl2 →
Be(NO2)2 +
MnCl2
Answer:
Double Displacement (Metathesis)
Beryllium Chloride - BeCl2
Manganese(II) Chloride - MnCl2
Explanation:
Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below
Always use the upper case for the first character in the element name and the lower case for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide
To enter an electron into a chemical equation use {-} or e
To enter an ion specify charge after the compound in curly brackets: {+3} or {3+} or {3}.
Example: Fe{3+} + I{-} = Fe{2+} + I2
Substitute immutable groups in chemical compounds to avoid ambiguity.
For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced,
but PhC2H5 + O2 = PhOH + CO2 + H2O will
Compound states [like (s) (aq) or (g)] are not required.
If you do not know what products are enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.
Reaction stoichiometry could be computed for a balanced equation. Enter either the number of moles or weight for one of the compounds to compute the rest.
Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents.
The balanced equation for the given reaction is:
[tex]\rm Mn(NO_2)_2 + 2BeCl_2 \rightarrow 2Be(NO_2)_2 + MnCl_2[/tex]
In chemistry, a balanced equation is a representation of a chemical reaction that follows the law of mass conservation. It assures that on both sides of the equation, the total number of atoms of each element remains constant.
[tex]\rm Mn(NO_2)_2 + BeCl_2 \rightarrow Be(NO_2)_2 + MnCl_2[/tex]
Balance the metals:
[tex]\rm Mn(NO_2)_2 + BeCl_2 \rightarrow Be(NO_2)_2 + MnCl_2[/tex]
Balance the non-metal (chlorine):
[tex]\rm Mn(NO_2)_2 + BeCl_2 \rightarrow Be(NO_2)_2 + MnCl_2[/tex]
Balance the nitrogen:
[tex]\rm Mn(NO_2)_2 + BeCl_2 \rightarrow Be(NO_2)_2 + MnCl_2[/tex]
Balance the oxygen:
[tex]\rm Mn(NO_2)_2 + BeCl_2 \rightarrow Be(NO_2)_2 + MnCl_2[/tex]
Balancing all the atom
[tex]\rm Mn(NO_2)_2 + 2BeCl_2 \rightarrow 2Be(NO_2)_2 + MnCl_2[/tex]
The balanced equation is:
[tex]\rm Mn(NO_2)_2 + 2BeCl_2 \rightarrow 2Be(NO_2)_2 + MnCl_2[/tex]
To know more about balanced equation, here:
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Question:
One of the properties we associate with diamonds is their luster. How would you define this
term?
Plz help?!
Answer:
luster means either sheen/glow or reflected light
Explanation:
luster is the appearance of mineral's surface in terms of light-reflective qualities
2. Which BEST compares bacteria and viruses?
bacteria are smaller than viruses
O bacteria are living organisms, but viruses are not
O bacteria cause disease, but viruses do not
O bacteria have genetic material, but viruses do not
Answer:
the sewcond one bacteria are living organisms, but viruses are not
Explanation:
Answer:
Bacteria are living organisms, but viruses are not
Explanation:
If the price of peaches increases, what can be expected?
More peaches will be sold.
Fewer peaches will be sold.
The number of peaches sold will be unaffected.
Peach orchards will produce less fruit.
Answer:
fewer peaches will be sold
Explanation:
if the price increases less people will want to buy it, but the orchards would still get money so they wouldnt be affected
Answer:
fewer peaches
Explanation:
Plz help I need the answer now!! Which statement is best supported by the evidence on the map?
A. Oil is produced mostly in the southern part of Africa.
B. Gold is found in every country in Africa.
O
C. Iron ore is found mostly in northern Africa.
D. Each country in Africa has about the same amount of each natural
resource.
Answer:
I'd say C. You can eliminate the rest of the answers and get C. Most of the iron is found up North on the map.
Explanation:
What is involved in creating genetically modified bacteria?
A. allowing them to reproduce freely
B. changing their food source
c. using biotechnology techniques
D. growing them on selected plants
2
A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 x 10
Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.
What is the mass of 1 mole of bricks?
?
How many moles of bricks have a mass equal to the mass
of the Earth?
Answer:mass of 1mole of brick = mass of 1 brick x avagadro number
= 4 kg x 6.022 x 10^23 bricks = 2.4 x 10^24 kg
No. of moles of bricks have a mass equal to the mass of the earth
= mass of earth / mass of 1 mole of brick
= [ 6 x 10^27 ] / [ 2.4 x 10^24 ]
= 2.5 x 10^3
= 2500 moles
Explanation:
what does kyle learn at the end
Answer:
Umm who's Kyle?
Explanation:
Answer:
his skills aren’t as valuable to the team as he thought
Explanation:
What is the amount of diamine silver that can be formed when 10.00 g AgCl is mixed with 1.00 L of 0.100 M NH3?
The amount of diamine silver chloride = 8.87 g
Further explanationGiven
10 g AgCl
1.00 L of 0.100 M NH3
Required
the amount of diamine silver
Reaction
AgCl + 2 NH₃ → [Ag(NH₃)₂]Cl
mol AgCl :
= mass : MW
= 10 g : 143,32 g/mol
= 0.0698
mol NH₃ :
= M x V
= 0.1 x 1
= 0.1
NH₃ as a limiting reactant
mol [Ag(NH₃)₂]Cl based on NH₃ :
= 1/2 x mol NH₃
= 1/2 x 0.1
= 0.05
Mass diamine silver :
= 0.05 x 177.3822 g/mol
= 8.87 g
HEY Plzzzzzzzzzzz HELP ILL GIVE BRAINLIEST ASAPPPPPPPPPPP
element A it's valance number is 3 and element B it's valance number is 6 make it compound
Answer:
A2B
Explanation:
A = 3
B = 6
exchange valencies
A6B3
A2B
how many grams of ZrCl4 can be produced if 123 g of ZrSiO4 react with 85.0 g of Cl2?
Answer:
153.3 grams of ZrCl₄ are produced
Explanation:
The equation of the reaction is as follows:
ZrSiO₄ + Cl₂ ----> ZrCl₄ + SiO₂ + O₂
molar mass of ZrSiO₄ = (91 + 32 + 16 * 4) = 187.0 g/mol
molar mass of ZrCl₄ = (91 + 35.5 * 4) = 233.0 g/mol
molar mass of Cl₂ = (35.5 * 2) 71.0 g/mol
From the equation of reaction, 1 mole of ZrSiO₄ reacts with one mole of Cl₂ to produce one mole of ZrCl₄
number of moles of ZrSiO₄ present in 123 g = 123/187 = 0.65 moles
number of moles of Cl₂ present in 85.0 g = 85.0/71.0 = 1.19 moles
therefore, ZrSiO₄ is the limiting reactant
123.0 g of ZrSiO₄ will react with excess Cl₂ to produce 123 * 233/187 grams of ZrCl₄ = 153.3 grams of ZrCl₄
Therefore, 153.3 grams of ZrCl₄ are produced
A _____ is two or more substances that are together in the same place but are not chemically combined.
Answer:
Mixture
Explanation:
A mixture has two or more substances that are together in the same place but are not chemically combined .
HOPE THIS HELPS YOU;)
If a substance melts at 20oC, what is its freezing point?
Answer:
It is difficult, if not impossible, to heat a solid above its melting point because the heat that ... in a solid are packed in a regular structure that is characteristic of that particular substance.
#carryONlearningBRIANLIEST!!!!!!
Use the mass to calculate the number of moles in a 347.89 g samples of ammonium
Answer:
20.46 moles
Explanation:
1 mole of NH3 contains 17gm of NH3
so 347.89 gm of ammonia is in,
347.89/17 moles
=20.46 moles
NOTE. There should be ammonia instead of ammonium in question because ammonium is an ion not a compound.
Plant cells and animal cells were observed under a microscope. The characteristics of two cells are listed below.
Cell X: Has chloroplast
Cell Y: Does not have a cell wall
Which statement about the two cells is correct? (5 points)
a
Cell X has a cell membrane.
b
Cell X has a small vacuole.
c
Cell Y has a large vacuole.
d
Cell Y has chloroplast.
Answer:
The answer is B
Explanation:
ITs B
Answer:
Cell X has a cell membrane
Explanation:
I took the test and got it right.
What is the percent composition of C4H10? (4 points)
44.6% C and 45.4% H
57.3% C and 42.7% H
82.7% C and 17.3% H
89.4% C and 10.6% H
Answer:82.7% C and 17.3% H
Explanation:
C4 = 12.0107g/mol x 4 = 48.0428 g/mol
H10 = 1.00794 g/mol x 10 = 10.0794 g/mol
Molar Mass of Butane, C4H10 = 48.0428 g/mol + 10.0794 g/mol= 58.1222 g/mol
percent composition of Carbon is = ( mass of carbon contained in butane / molar mass of Butane) x 100
=(48.0428 /58.1222) x 100% = 0.8265 x 100
=82.65% =82.7% of Carbon.
Percent composition of Hydrogen = (mass of Hydrogen contained in Butane / molar mass of Butane )x 100
( 10.0794/58.122 ) x 100% =0.1734 x 100
= 17.3% OF Hydrogen.
Answer:
C- 82.7% C and 17.3% H
Explanation:
I took the Quiz
Help pls thnk you!!!!
What is the molecular formula of paradichlorobenzene that has a molar mass of 147.g/mol and an empirical formula of C3CIH2?
Answer:
the molecular formula of paradichlorobenzene is C6H4CL2
If you have 90L of water, what is the volume?
Answer:
900
Explanation:
Magnesium bromide is prepared in a laboratory using the reaction below. Typically, the magnesium bromide is recoveted as a solid by heating way the remaining water
Mg(s) + 2 HB-(aq) - MgBrac) + H200)
If 0.940 mole of HBr in solution is added to 16.5 grams of Mgo in a beaker and then is heated until dry, what are the expected contents of the beaker?
How do you solve -8r=240
Answer:
You solve that dividing beach term by -8 and simplifying which for this answers will give you r=-30
Explanation:
Pls correct me if I’m wrong.
Hope this helps :)
What is the molarity of the following solution? 3.48 mol in 4.1 L of solution
Answer:
molarity is moles/L so take the 3.48 and divide it by 4.1L
and get 0.848... and need to keep your answer to 2 digits as that is th emost precise measurement you have (the 4.1L)
so 0.85mol/L
Explanation:
True or false? Covalent molecules are formed when non-metal atoms share electrons with other non-metal atoms.
Answer:
true
covalent bonds are between non metals and nonmetals. and they are sharing electrons.
explain how sand is form
Answer:
Sand comes from many locations, sources, and environments. Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar .
Explanation:
Use the periodic table to determine the molar mass of each of the following elements. Use the correct number of significant figures.
Potassium (K):
g/mol
Osmium (Os):
g/mol
Manganese (Mn):
g/mol
Answer:
Potassium (K): 39.10 g/mol
Osmium (Os): 190.23 g/mol
Manganese (Mn): 54.94 g/mol
Explanation:
Just got it right on Edge 2021
The molar mass of the following elements are
Potassium (K): 39.10 g/mol
Osmium (Os): 190.23 g/mol
Manganese (Mn): 54.94 g/mol
What is molar mass?The molar mass of a substance is grams of one mole of that substance.
It can be calculated by dividing the atomic weight of the element, and the number of atoms found in that element.
Manganese is a transition metal with the atomic number 25.
Potassium is an essential mineral that is an alkali metal and its atomic number is 19.
Osmium is also a transition metal whose atomic number is 76.
Thus, the molar mass of the elements are, Potassium (K): 39.10 g/mol
Osmium (Os): 190.23 g/mol
Manganese (Mn): 54.94 g/mol
Learn more about molar mass
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Be able to describe the relationship between Freedom of Movement and phase change.
Ion knoe Wdym by “be able to describ’ so ima put it in my own words idr lol:)
if you talm bout some kentic energy or sum ok but other Dan dat ion knoe tbh
I can explain how transferring kinetic energy in and out of a substance can cause a change