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
is CdCi2 covalent or ionic
Answer:
binary and 11
Explanation:
CaCl2 or Calcium Chloride is an ionic bond and not a covalent bond. Since there should be sharing of electrons between two atoms to be a covalent bonding. In case of calcium chloride, the calcium gives up an electron to each chlorine atom, becoming Ca2+ ions and chlorine become Cl– ions.
:)
How does pouring water extinguish fire?
Why is water said to be universal solvent?
A.it dissolves some substances.
B.It dissolves almost all substances
C.It is dissolved by some substances.
D.It is dissolved by almost all substances.
Answer:
B
Explanation:
And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.
Answer:
I believe it's B
Explanation:
Water can dissolve with any that's why it's universal and can dissolve substancrs more than any other Liquid.
please give me brainliest!
hope this helps
Q.3 Which the following statements about the given reaction are correct:
3Fe(s) + 4H2O(g)- Fe203 (S) + 4H2(g)
i) Iron metal is getting oxidized
ii) Water is getting reduced
iii) Water is acting as reducing agent
iv) Water is acting as oxidizine agent
a) (i), (ii) and (iii) b)(iii) and (iv)
c) (i), (ii) and (iv) d) (ii) and (iv)
Answer:
The statements which are correct are;
c) (i), (ii) and (iv)
Explanation:
The chemical equation is presented as follows;
2Fe(s) + 3H₂O(g) → 3Fe₂O₃(s) + 3H₂(g)
Therefore, we have;
i) The iron gains oxygen atoms and therefore gets oxidized
The iron loses 3 electrons each to become oxidized to Fe³⁺ in Fe₂O₃
ii) The water loses oxygen and therefore it is getting reduced
iv) The water donates oxygen and therefore it is acting as the oxidizing agent
The correct options are (i), (ii) and (iv).
why is mineral water a compound
Answer:
Because it is made up of different minerals which are chemically combined.
Explanation:
why do non-metal aroms form covalent bonds e.g. H2O
Answer:
Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom. ... Covalent compounds tend to be soft, and have relatively low melting and boiling points.
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]
Carbon exists in many forms on Earth. The diagram below shows part of the carbon cycle. What is happening in Step 1? *
1 point
Captionless Image
Animals are decomposing and releasing carbon into the soil.
Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
Animals are releasing energy into the environment and storing carbon.
Animals are converting carbon dioxide from the atmosphere to oxygen.
The first step of carbon cycle is animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
What is a carbon cycle?Carbon cycle completes into four steps: photosynthesis, decomposition, respiration, and combustion.
In the first step, carbon enter the environment by respiration, and in the second step, carbon dioxide is consumed by plants.
Thus, the correct option is B.
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how is a compound different from mixtures
Answer: a compound is a substance that is made up of more than one type of atoms bonded together, mixtures are a mix of multiple elements or compounds which haven't bonded together.
Explanation:
y = (x-16)2 A. Shift the graph of y = x2 down 16 units. B. Shift the graph of y= x2 right 16 units. C. Shift the graph of y = x2 left 16 units. D. Shift the graph of y = x2 up 16 units.
Answer:
Uhmm i think i dont know the sent r 6un Dury r in eyeing in d7ue
PLEASE CAN SOMEONE PLEASE HELP ME I CAN'T DO IT :(
CaCO3 + H2SO4 __________ + H2O + CO2
Na2CO3 + __________ 2NaCl + H2O + CO2
Answer:
H2SO4 + CaCO3 → CaSO4 + H2O + CO2 - Balanced equation | Chemical Equations online!
Na2co3 HCL nacl h2o co2
This is an acid-base reaction (neutralization): Na 2CO 3 is a base, HCl is an acid. This is a gas evolution reaction, CO 2 is the formed gas.
MAX TEN MINUTES PLZZZZZ HURRY
Essential Question:
How does the transfer of thermal energy become minimized or maximized?
explain you hypothisith
Answer:
when it reduces heat.
Explanation:
Thermal energy is transferred to material,the motion of its particles speeds up and it's temperature differences.Insulating materials are bad conductors and so this reduces the heat loss by conduction.The material also prevents air circulating inside the cavity,therefore reducing heat loss by convection.Heat loss through the roof can be reduced by laying loft insulation.
What happens when molecules absorb energy?
A. Nothing
B. The molecules move faster
C. The molecules move slower
Answer:
C. The molecules move slower
Explanation:
Mercury is a liquid at room temperature, gallium will melt if held in your hand, and aluminum is a solid that has a high melting point. All three are metals. How can you explain these observations using information about the strength of metallic bonds?
Answer:
the solid is so hard
Explanation:
yan na po sana makatulong po heheheh
Metals such as Gallium and mercury are different from that of other metals like aluminium because they are liquid at room temperature. This is because of valence electrons which are relatively free in these metals.
What are Metals?
All the metals except mercury and gallium are solids at room temperature. These metals are liquids because of both the high electrical conductivity and the thermal conductivity which come from the fact that one or more valence electrons is relatively free in these atoms to travel throughout the solid metal. This has been formalized in the Wiedemann-Franz law.
Both Gallium and mercury are unique elements (metals) which occur in the liquid state at near the room temperature. It is important here to note that mercury is essentially a liquid at room temperature while gallium becomes liquid at temperature near to room temperature. They both melt very easily due to the low melting temperature values.
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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 :)
Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced?
Answer:
The answer is "164.2726 g "
Explanation:
Equation:
The molar weight of
The mol in
The molar weight of
The moles in
The ratio in the equation is 3:1 so, limits reaction the ratio is 3:1 therefore, 0.392456 mol of were reacted
The molar mass of the
[tex]mass= mol \times Molar \ Weight[/tex]
[tex]= 418.576 \times 0.392456 \\\\= 164.2726 \ g \ of \ Ag_3PO_4[/tex]
1. What are commonly called as "shooting stars"?
A. asteroids
B. comets
C. meteors
D. meteorites
2. What are found in the circular or somewhat like "doughnut-shaped"
region between Mars and Jupiter?
A. asteroids
B. comets
C. meteors
D. meteorites
3. Which Near-Earth Objects (NEO) are found on the Kuiper Belt and Oort
Cloud?
A. asteroids
B. comets
C. meteors
D. meteorites
4. What are comets made of?
A. dust only
B. metal only
C. dust and metal
D. dust, metal, and ice
5. What do you call the shining "head" around a comet?
A. coma
B. crown
C. halo
D. ring
Answer:
I hope I can help you
I hope I can help you
Humans depend on ecosystems for ecosystem services and
resources. For example, this river ecosystem provides water, fish,
and a place to swim. The forest ecosystem provides wood, shade,
and erosion control. Choose a resource and describe the possible
effects of its use on society and on ecosystems throughout its life
cycle.
Explanation:
ok, forest ecosystem always recycle its resources;
dead animals are always returned to the ground, providing fertility of trees & other vegetation for the animals that consume its harvest...this ecosystem provides natural remedies for human ailments, rich soil provides farming, and re using of such, as long as it is not over harvested. The Indians that live there have vast knowledge of their surroundings...
What is the total number of joules required to freeze a 10 g sample of water at 0°C?
show work if possible and will give brainliest
Explanation:
the answer will be 98.4 kJ
As per concept of enthalpy of fusion , 98,397 joules of energy are required to freeze 10 g of water at 0°C.
What is enthalpy of fusion?Enthalpy of fusion is defined as the enthalpy change which results from when a substance changes its state from solid to a liquid at a constant pressure.Heat of solidification is opposite of enthalpy of fusion.During fusion there is a phase transition which takes place, from liquid to solid.
The temperature at which the fusion takes place is called as the fusion temperature. This enthalpy is accompanied without any change in temperature.
Enthalpy of fusion of water=333.55 J/g . This value is for 1 g of water as per definition,hence for 10 g water enthalpy of fusion is 10×333.55=3335.5 J.
Hence, 3335.5 joules are required for freezing 10 g sample.
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Elements that have some properties of metals and some properties of nonmetals
Answer:
metalloids aka semimetals
Explanation:
Complete the following reaction :
HC≡CH + HBr→?
hope it helps you .............
From Bill Nye Germs video in the way cool scientist section, what career is the focus of this segment?
I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know
Convert CH4 to C2H6?
Dehydration of alcohol by conc. H2SO4.....?
Answer:
1.
CH4 + Cl2 → CH3-Cl + HCl
2CH3-Cl +2Na → C2H6
2.
CH3-CH2-OH ---(conc. H2SO4)----> CH2=CH2 + H2O
Explanation:
1. Conversion of methane to ethane
Step 1 - Treat methane with chlorine gas presence of ultraviolet light
CH4 + Cl2 → CH3-Cl + HCl
Step 2 - Treat chloromethane formed in step 1 with the sodium metal and dry ether (Wrutz synthesis)
2CH3-Cl +2Na → C2H6
2. On treating ethanol with excess of concentrated sulfuric acid, it converts into ethene
CH3-CH2-OH ---(conc. H2SO4)----> CH2=CH2 + H2O
CAN SOMEONE HELP ME PLEASE Evaluate, using the measurements and observations in Figure 8, whether ethanol or butanol is the
better fuel for heating the water.
Include calculations in your answer.
Answer:
ethanol
Explanation:
The better fuel for heating the water is ethanol as it burned with a clean blue flame.
What are the different colors of flame?The color of a flame can be red, orange, blue, yellow, or white. When extra chemicals are added to the fuel burning, it affects the frequencies of visible light radiation emitted.
The temperature of a flame is shown by its color and bright blue and has a temperature of about 1670 K. The temperature will drop as the color changes from yellow to orange. The cooler flame is often red and also forms smoke. The color of the flame also depends upon the supply of oxygen gas that is required to burn.
As mentioned in the observations of the ethanol and butanol. The ethanol burns the clean blue flame while butanol burns with a yellow sooty flame.
Therefore, ethanol is a better fuel for heating water than butanol.
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Count the number of bonding pairs and the number of ione pairs around the left chlorine atom
Explanation:
I think
Bonding pairs = 4
Lone pairs around the left chlorine atom = 9
What is the name given to substances that are initially involved in a chemical reaction?
Answer:
the awnser is reactants
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:
Rafa places some copper into a solution of sodium chloride. No reaction takes place. Using the displacement theory, explain why no reaction took place?
Na more reactive than Cu
Further explanationGiven
Copper in a solution of NaCl
Required
The displacement theory
Solution
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.
The voltaic series:
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe²⁺-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Fe³⁺-Ag-Pt-Au
The electrode which is easier to reduce than the hydrogen (H2) electrode has a positive sign (E red= +) and is located to the right of the voltaic series (right of H)
The electrode which is easier to oxidize than the hydrogen (H2) electrode and is difficult to experience reduction has a negative sign (E red= -) and is located to the left of the voltaic series (left of H)
Reaction
Cu + NaCl≠
The existing copper element can not replace the sodium element, which is on the left side so the reaction will not occur.
But if it is reversed, then a reaction can occur
2 Na + CuCl2 → Cu + 2 NaCl
how many grams of caffeine are found in 6.500 x 10^22 molecules of caffeine?
Answer:
21.614 grams are found in [tex]6.5 \times 10^{22}[/tex] molecules of caffeine.
Explanation:
The chemical formula for caffeine is [tex]C_{8}H_{10}N_{4}O_{2}[/tex], the molar weight of caffeine is:
[tex]M = 8\cdot \left(12.011\,\frac{g}{mol} \right) + 16\cdot \left(1.008\,\frac{g}{mol} \right)+4\cdot \left(14.007\,\frac{g}{mol} \right)+2\cdot \left(15.999\,\frac{g}{mol} \right)[/tex]
[tex]M = 200.242\,\frac{g}{mol}[/tex]
According to Avogadro's Law, a mol of caffeine contains [tex]6.022\times 10^{23}[/tex] molecules. The number of grams contained in [tex]6.5 \times 10^{22}[/tex] molecules is determined by simple rule of three:
[tex]x = \frac{6.5\times 10^{22}\,molecules}{6.022\times 10^{23}\,molecules} \times 200.242\,g[/tex]
[tex]x = 21.614\,g[/tex]
21.614 grams are found in [tex]6.5 \times 10^{22}[/tex] molecules of caffeine.
Ethyl ethanoate is used as a solvent for varnishes and in the manufacture of artificial leather. The formula below represents a molecule of ethyl ethanoate. Write the empirical formula for this compound.
Answer: The empirical formula for the ethyl ethanoate molecule is C2H4O.
Explanation:
Ethyl ethanoate is an ester which is formed together with water when ethanol reacts reversibly with acids. This can be illustrated below:
CH3COOH +. C2H5OH <----> CH3COOC2H5 +
H2O
Ethyl ethanoate can be used as an important solvent for varnishes and in the manufacture of artificial leather.
Different formulas can be used to illustrate a chemical compound.
--> Empirical formula of a compound is used to illustrate the simplest whole-number ratio of atoms in a compound.
--> Structural formula of the compound gives an illustration of how the atoms of the compound are bonded to each other.
--> Molecular formula shows the number of each type of atom in a molecule.
The formula given, the molecular formula of the compound is C4H8O2:
C4 H8 O2
4 : 8 : 2
Using 2 to divide through to get the simplest ratio gives rise to C2H4O as the empirical formula.