Answers
Related Questions
Write chemical name ofNH4Cl, Na2CO3.
Answers
Answer:
NH4CI
AMMONIUM CHLORIDE
NA2CO3
SODIUM CARBONATE
By February of 1861, how many states seceded from the Union?
5
11
9
7
Answers
Answer:
D. 7
Explanation:
i did it
HELP PLSSSSSS ASAPPPPP
Answers
My key
Synthesis Reactions = SR
Decomposition Reaction = DR
Single Replacement Reaction’s = SRR
Double Replacement Reactions = DRR
Combustion Reactions = CR
#1 SR
#2 SR
#3 SR
#4 SRR
#5 DRR
#6 SR
#7 DR
#8 DR
#9 sorry not sure
#10 DR
#15 SR
sodium hydrogen carbonate is heated after heating which substance is form??? and what is the colour of the substance
Answers
Help please!! I'll name you brainliest!!
Answers
the answers is cacih2
wjdgagqjdhdgahahdhvddvvsvshsd
Consider the rate law below.
R=k[A]2
What effect does doubling the concentration have on the rate?
A. doubles the rate
B. triples the rate
C. quadruples the rate
D. no effect on the rate
Answers
C. quadruples the rate
Further explanationGiven
The rate law :
R=k[A]²
Required
The rate
Solution
There are several factors that influence reaction kinetics :
1. Concentration 2. Surface area 3. Temperature 4. Catalyst 5. Pressure 6. StirringThe rate is proportional to the concentration.
If the concentration increased, the reaction rate will increase
The reaction is second-order overall(The exponent is 2)
The concentration of A is doubled, the reaction rate will increase :
r = k[A]² ⇒ r= k[2A]²⇒r=4k[A]²
The reaction rate will quadruple.
How many Joules of heat are required to melt 250 grams of ice at 0°C?
AHfus = 334 J/g
AHvap = 2258 J/g
Cp= 4.184 J/g C
Answers
Answer:
cp =4.184/c / j
Explanation:
ahvap=2258j/g
Heat required : Q = 83500 J = 83.5 kJ
Further explanationGiven
mass ice = 250 g at 0°C
Required
The heat required
Solution
The heat to change the phase can be formulated :
Q = m.Lf (melting/freezing)
Lf=latent heat of fusion
Input the value :
Q = 250 g x 334 J/g
Q = 83500 J
How is heat transferred through space
Answers
Heat is transferred by energy waves moving through space. Explanation: According to research: Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible
Please give brainiest if possible, I kinda need it. Thnx!
Answer:
the transfer of energy through space is called radiation. through radiation there is no direct contact between heat source and object. sunlight radiation warms the earth's surface; radiation can also come from fires.
Si en un laboratorio hay 300 moles de plomo y 300 moles de plata en cual de los dos casos la masa en mayor?
Answers
Answer:
Esto significa que la masa en las moles de plomo es mayor que en las de plata.
Explanation:
Las moles de los átomos representan la cantidad de átomos presentes. Para saber la masa de los átomos debemos convertir las moles a gramos usando el peso molecular de cada uno de los átomos (207.2g/mol para el plomo y 107.82g/mol para la plata).
La masa de plomo en 300 moles es:
300 moles * (207.2g / mol) = 62160g de plomo
Y la masa de plata es:
300 moles * (107.82g / mol) = 32346g de plata
Esto significa que la masa en las moles de plomo es mayor que en las de plataA by-product of photosynthesis that is not used by the plant, but rather released into the air, is ________________.
Answers
Answer: I think is carbon dioxide!!
Explanation: ( i havent learned about photosynthesis in a long time :) )
hope i helped!! also have a good day!
PLEASEEEE HELP I WILL GIVE 30 POINTS Cobalt
Calcium
Platinum
Phosphorus
Part II:
Look at a periodic table, and in the space below type the missing chemical or symbol. Then answer the question below.
Iron:
Co:
Na:
Tin:
P:
F:
Fe:
Magnesium:
Uranium:
Ca:
Carbon:
Lead:
Ag:
Zn:
Ni:
Part III:
You have found a new element with the atomic mass of 119. In a paragraph explain where you would put in on the periodic table and why you would put it there. What type of properties would this element have? What would you call it?
Answers
Answer:
Iron: Fe
Co: Cobalt
Na: Sodium
Tin: Sn
P: Phosphorus
F: Flourine
Fe: Iron
Magnesium: Mg
Uranium: U
Ca: Calcium
Carbon: C
Lead: Pb
Ag: Silver
Zn: Zinc
Ni: Nickle
----------------
There is honestly no right answer for this but here is what I would put:
Atomic mass increases as you go from left to right. If you look at the periodic table, it would be between Sn and Sb. It would bet here because Sn is 118 and Sb is 121. Basing it off of Antimony and putting it in group 15, the properties are that it is metallic and is a poor conductor of heat. I would call it Stin, which would be shortened to St.
V7
Which of the following is a MIXTURE. Select ALL that apply.
(0/1 Point) a:brass
b:calcium
c:sodium chloride
d:apple juice
Answers
Answer:
sodium chloride
Explanation:
what is metaphase
HELEPWOAUSJSKQJDHEHR
Answers
Answer:
the second stage of cell division. its between prophase and anaphase during the chromosomes become attached to spindle fibers.
When two objects are touching, thermal
energy transfers from...
hotter to colder substances?
Or
colder to hotter substances?
Answers
Answer:
According to the laws of thermodynamics, Molecular movements of particles will tend to move into state of lower energy and this would mean that knowing the vibrational and translational energy of complex molecules will lose and give off energy usually in the form of heat but also sound and other transferable mediums it will tend to become less energetic and this mobile indicative of colder objects, if examining the average Molecular kinetic energy and bond energies of the compounds in question.
The nucleus of an atom contains ________________________________________.
Answers
Answer:
protons(positively charged) and the neutrons (no charge)
Explanation:
Answer:
The nucleus of an atom contains protons and neutrons.
H-H-C=C-H-H + Br—Br —> H-H-Br- C-C-H-Br-H
Answers
Answer:
Complexity.
Explanation:
Okay, I am NOT explaining this whole thing, but simply, C2n product.
Don't ask. Just don't.
List four rules for rounding numbers.
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Answer:
the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 38 rounded to the nearest ten is 40
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30
Rounding fractions works exactly the same way as rounding whole numbers. The only difference is that instead of rounding to tens, hundreds, thousands, and so on, you round to tenths, hundredths, thousandths, and so on.
By rounding off, you could easily figure out that you would need about $6.00 to pay for your groceries.
Scott and his classmates were looking at an animal cell under a microscope. They are trying to locate the cell's DNA, which is found in its chromosomes. Where should Scott look to find the chromosomes?
In the mitochondria
In the cell nucleus
In the cytoplasm
In the cell vacuole
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3. Iron + copper sulphate
Will it react
Answers
Answer: Iron displaces copper ions from an aqueous solution of copper sulphate. ... In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).
Explanation:
David walks 10 Km North. He turns East and walks 10 more Km. What is his distance
Answers
Answer:
20 km
Explanation:
he walks 10 km + another 10 km so 20 :)
True/False: All of the elements combine in a variety of ways to make up all living and all nonliving things
Answers
Answer:
true
Explanation:
A2B8 + C2 - B2C + AC2
Answers
Answer:
You need to put more info! If you are trying to find the GCF its 1
How many moles of S2 are needed to produce 1.50 moles of SO2 gas
Answers
Answer:
1.5moles of S;
Explanation:
The reaction expression is given as:
S + O₂ → SO₂
Number of moles of SO₂ = 1.5moles
From the balanced reaction expression:
1 mole of SO₂ will be produced from 1 mole of S;
So; 1.5moles of SO₂ will produce 1.5moles of S;
The moles of S₂ needed to produce 1.50 moles of SO₂ gas is 1.5 mol.
What are moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
The reaction is
S + O₂ → SO₂
The number of moles of SO₂ is 1.50 mol
1 mole of S produce 1 mole of SO₂
Then, 1.5 mole of S will produce 1.5 SO₂
Thus, the moles are 1.5.
Learn more about moles
https://brainly.com/question/20486415
1) How many atoms are in Molecules? O One O Exactly two O Two or more O Compounds don't have atoms
Answers
Answer:
Two or more!
Explanation:
How many moles of H2S are produced?
Answers
Answer:
You can view more details on each measurement unit: molecular weight of H2S or grams This compound is also known as Hydrogen Sulfide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2S, or 34.08088 grams. Note that rounding errors may occur, so always check the results.
The number of grams that one "mole" of a substance weights is the definition of molar mass. So, the molar mass of H₂S is "34.08088"gams.
Molar mass:In the definition of molar mass is the total atomic weights of the atoms that make up a molecule.Detailed information about each measurement unit can be found here: H₂S molecular weight in grams Hydrogen Sulfide is another name for this substance. A mole is the SI base unit for substance quantity. One mole of H₂S, or 34.08088 grams, is equal to one mole of H₂S.Find out more about the moles here:
brainly.com/question/20055843
If 42.68 ml of 0.43 M KOH is used to neutralize 18.40 ml of H, SO4, calculate
the concentration of the sulfuric acid solution.
Write the net ionic equation of this reaction
Answers
The concentration of the sulfuric acid : 0.499 M
The net ionic equation
2 OH ⁻(aq]+ 2 H ⁺ (aq] → 2 H ₂O (l]
Further explanationGiven
42.68 ml of 0.43 M KOH
18.40 ml of H2SO4
Required
the concentration of the sulfuric acid
the net ionic equation
Solution
Acid-base titration formula
Ma. Va. na = Mb. Vb. nb
Ma, Mb = acid base concentration
Va, Vb = acid base volume
na, nb = acid base valence
Input the value :
a=KOH, b= H2SO4
0.43 x 42.68 x 1 = Mb x 18.40 x 2
Mb = 0.499 M
The net ionic equation
Reaction
2KOH + H2SO4 → K2SO4 + 2H2O
2 K ⁺ (aq]+ 2 OH ⁻ (aq] + 2 H ⁺ (aq] + SO ₄²⁻(aq] → 2 K ⁺ (aq] + SO ₄²⁻(aq] + 2 H ₂ O (l]
canceled the spectator ions :
2 OH ⁻(aq]+ 2 H ⁺ (aq] → 2 H ₂O (l]
When matter has define volume ,but can take the shape of its container we call it a
Answers
What is the correct formula for the ionic compound chromium (III) nitride?
Answers
hope that helps
- How many moles of S2 are needed to produce 1.50 moles of SO2 gas? S2 + 20, ----> 2802
Answers
Answer:
0.75 moles
Explanation:
S2 + 2O2 = 2SO2
From the reaction above,
We see that number of moles attached to S2 is 1 and number of moles attached to SO2 is 2.
Since we want to find how many moles of S2 are needed to produce 1.50 moles of SO2 gas
The answer is gotten by proportion;
Number of moles = 1/2 × 1.5 = 0.75 moles
ILL GIVE U BRAINLYSIT
Answers
Answer:what?
Explanation:what? Huh