Explanation:
Sugar - Pure substance
Magnesium Ribbon - Pure Substance
Vegetable soup Heterogeneous mixture
Bath oil - Homogeneous mixture
Tin of assorted biscuits - Heterogeneous mixture
Peanuts and raisins - Heterogeneous mixture
Copper wire - Pure Substance
Bicarbonate of soda (Baking soda) - Pure Substance
How many oxygen molecules are in this compound: H2O
Answer:
1 oxygen molecule is present in H₂O
Explanation:
How to find out?
There's a 2 beside H in H₂O showing that there are '2 atoms of hydrogen'
However there's no number to the right of Oxygen, so it is just 1.
Is Iridium transparent, translucent, or opaque?
Answer:
It's Opaque because it's a Hard Mattel
Explanation:
(⌐■-■)/━☆ﾟ.*･｡ﾟHave A Good Day
stoichiometrically when 0.01 kg of CaCO3 is heated to produce CO2, occupied a volume at STP is
a. 2.2414 dm^3
b. 22.414 dm^3
c. 22414 dm^3
d. 224014 dm^3
Answer:
anjsbzhahxbVAbzbsbsbsbsjsjsdp
What is the maximum number of moles of PH 3 that can be formed when 0.2 formed moles of phosphorus reacts with 4 moles of hydrogen to form PH 3? P 4(g) + 6H 2 (g) 4PH 3 (g)
Answer:
The maximum number of moles of PH₃ that can be formed is 0.8 moles.
Explanation:
The balanced reaction is:
P₄ + 6 H₂ → 4 PH₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
P₄: 1 moleH₂: 6 molesPH₃: 4 molesThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, you can use a simple rule of three as follows: If by stoichiometry of the reaction 6 moles of hydrogen react with 1 mole of phosphorus, 4 moles of hydrogen will react with how many moles of phosphorus?
[tex]moles of phosphorus=\frac{4 moles of hydrogen*1 mole og phosphorus}{6moles of hydrogen}[/tex]
moles of phosphorus= 0.667
But 0.667 moles of phosphorus are not available, 0.2 moles are available. Since you have less moles than you need to react with 4 moles of hydrogen, phosphorus will be the limiting reagent.
Then you can apply the following rule of three: if by stoichiometry 1 mole of P₄ forms 4 moles of PH₃, 0.2 moles of P₄ will form how many moles of PH₃?
[tex]moles of PH_{3} =\frac{0.2 moles of P_{4} *4 moles of PH_{3} }{1 mole of P_{4} }[/tex]
moles of PH₃= 0.8
The maximum number of moles of PH₃ that can be formed is 0.8 moles.
Which molecule has the most atoms?
A. CO2
B. N202
C. CO
D. H₂O S
how many moles of ammonia (NH3) are in 224L at standard pressure?
Answer:
10 moles
Explanation:
(224 L)*(1 mol/22.4 L) = 10 mol
1 mol/22.4 L is the conversion factor under standard temperature and pressure
please help
Differentiate between the three systems of rearing pigs.
this is ur answer
plzzz mark me as brainliest
Using the mole ratio, how many moles of NH3 are produced when 0.60 mol of nitrogen reacts with hydrogen in the equation N2 + 3H2 --> 2NH3?
Answer:
1.2 moles of NH3 are produced
Helppppp plzzz for 30 points
Answer with Explanation:
This is expirament based Q
1) Bring a magnet near ... the Cobalt will come out of te mixture and get attracted to magnet
2) Disolve it in a solution of ethanol. The Idoine gets dissolve and the other doesnt.
Hope im right!!
Answer:
i am not sure enough for A but i think the ans is in dilute amount
Explanation:
Which of the following statements is incorrect about atoms?
a. Atoms are electrically neutral
b. Atoms are in possession of same number of electrons and protons
c. The number of electrons is not equal to the number of protons in an ion
d. All atoms can lose or gain electrons to form ions
Answer:
Letter D
Explanation:
#Carry On Learning
Which of the following are decomposition reactions? ch4 (g) + o2 (g) → co2 (g) + h2o (l) cao (s) + co2 (g) → caco3 (s) mg (s) + o2 (g) → mgo (s) pbco3 (s) → pbo (s) + co2 (g)
Answer:
I cant really see the individual problems very well but i hope this helps
Explanation:
Decomposition = one thing -> 2 or more things
Synthesis= 2 or more things -> 1 thing
Calculate how many grams of water needed to dissolve 35.00g KNO, at 50.0°C
Don't forget sigfigs and units
Answer:use of significant figures in calculations in Essential Skills 1 () prior to working this example. A Density is mass per unit volume and is usually reported in grams per cubic understand its identity, he found that carbon dioxide dissolved in water to produce compounds were not generally accepted for more than 50 years.
Explanation:
Please help me ASAP!!!!!!!!!
Temperature of Gas (degrees C)
Near 0 degrees C 3°
Near 20 degrees C 21°
Near 40 degrees C 40°
Near 60 degrees C 57°
Near 80 degrees C 82°
Near 100 degrees C 98°
Height of the column of gas (cm)
5.7 cm
6.2 cm
6.7 cm
6.9 cm
7.4 cm
7.8 cm
Temperature of gas (K)
276 k
294 k
313 k
330 k
355 k
371 k
Volume of gas (cm^3)
0.72 cm
0.78 cm
0.84 cm
0.87cm
0.93 cm
0.98 cm
Ratio V/T (cm^3/K)
0.72/276
0.78/294
0.84/313
0.87/330
0.93/355
0.98/371
Graph!
1. Make a scatterplot of temperature (K) vs. volume (cm^3)
2. Use a regression calculator (Excel works fine) to determine the equation of the line of best fit for the scatterplot.
3. Determine R. A value close to 0 indicates that there is not a linear relationship. A value near +1 indicates that the data is strongly linear.
4. If the Volume-intercept is close to 0, volume and temperature (in K) are proportional.
Explanation:
chemical analysis of a compound shows that it contains 0.99g lead ,0.154g sulfur and 0.306g oxygen. what is the empirical formula of the compound.
Chemical analysis of a compound shows that it contains 0.99g lead ,0.154g sulfur and 0.306g oxygen. what is the empirical formula of the compound.
What is gas law?This can be solved by using one of the different gas laws. This is shown below:
PV / T
Given:
P1 = 0.98 atm
V1 = 212 cm^3
T1 = 293 K
P2 = ?
V2 = 196 cm^3
T2 = 308K
Substituting to the relation:
P1V1/T1 = P2V2/T2
(0.98 * 212)/293 = (P2 * 196)/308
P2 = 1.114 atm
For this we use general equation for gases. Our variables represent:
p- pressure
v-volume
t- temperature
P1V1/T1 = P2V2/T2
in this equation we know:
P1,V1 and T1, T2 and V2.
We have one equation and 1 unknown variable.
P2 = T2P1V1/T1V2 = 1.1atm
We know that when two lines cross each other forming four angles, such that, each pair of opposite angles are equal to each other. This pair of angles are known as Vertical opposite angles.
Similarly, ∠KML = ∠JML = 25°.
Therefore, Chemical analysis of a compound shows that it contains 0.99g lead ,0.154g sulfur and 0.306g oxygen. what is the empirical formula of the compound.
Learn more about oxygen on:
https://brainly.com/question/13370320
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Describe 2 theories on the origin of the moon
Answer:
According to the text "After the sun spun to light, the planets of the solar system began to form. But it took another hundred million years for Earth's moon to spring into existence. There are three theories as to how our planet's satellite could have been created: the giant impact hypothesis, the co-formation theory and the capture theory."
~Deku
Explanation:
A mixture of PCl5(g), PCl3(g), and Cl2(g) is in a 1.00 L reaction vessel. The total pressure of the reaction system is 1.40 atm at equilibrium. Then the volume of the reaction vessel is reduced from 1.00 L to 0.50 L and equilibrium is re-established at constant temperature. What is the total pressure of the system at this point?
Answer:
The total pressure immediately after the volume reduction is 2.8 atmospheres
Explanation:
The question parameters are as follows;
The initial volume of the reaction vessel, V₁ = 1.00 L
The initial pressure of the reaction system, P₁ = 1.40 atm
The final volume of the reaction system, V₂ = 0.50 L
With the assumption that the gas mixture behaves as an ideal gas, and the temperature is constant, by Boyle's law we have;
P₁·V₁ = P₂·V₂
Where;
P₁ = The initial pressure in the reaction vessel
V₁ = The initial volume in the reaction vessel
P₂ = The total final pressure in the reaction vessel after the reduction in the vessel volume
V₂ = The final volume in the reaction vessel
∴ P₂ = P₁·V₁/V₂
From which we have;
P₂ = 1.40 atm × 1.00 L/(0.50 L) = 2.8 atm
The total final pressure in the reaction vessel, P₂ = 2.8 atm.
how many moles of sodium will react with water to produce 2.0 mol of hydrogen in the following reaction?
2Na(s) + 2H20(1) - 2NaOH(aq) + H2(g)
Answer: 4.0 moles of sodium will react with water to produce 2.0 mol of hydrogen
Explanation:
The balanced chemical equation is:
[tex]2Na(s)+2H_2O(l)\rightarrow 2NaOH(aq)+H_2(g)[/tex]
According to stoichiometry :
1 mole of [tex]H_2[/tex] is produced by = 2 moles of [tex]Na[/tex]
Thus 2.0 moles of [tex]H_2[/tex] are produced by =[tex]\frac{2}{1}\times 2.0=4.0moles[/tex] of [tex]Na[/tex]
Thus 4.0 moles of sodium will react with water to produce 2.0 mol of hydrogen
Balance chemical equation Calcium hydroxide + carbon dioxide = calcium carbonate + water
Answer:
yaeh
Explanation:
a)Ca(OH)
2
+CO
2
⟶CaCO
3
+H
2
O
No. of atoms:Ca−1;O−4;H−2;C−1
b)Zn+AgNO
3
⟶ZnNO
3
+Ag
No. of atoms:Zn−1;Ag−1;N−1;O−3.
-Are two atoms of the same element identical?
-Can water stay liquid below zero degrees Celsius?
-Can you light diamond on fire?
-How bad of an alcoholic do you have to be to have your brain affected?
-How can glass be a liquid if it's so hard?
-How do I know if something is an acid so I can avoid eating it?
Answer:
-Are two atoms of the same element identical?
no two atoms of the same element are not identical.as its nature will be different
-Can water stay liquid below zero degrees
Celsius?
no it can not be 0°c as its freezing point is 0°c
-Can you light diamond on fire?
yes I think.its refractive index is high.
y
-How bad of an alcoholic do you have to be to have your brain affected?
it causes pressure on mind .
-How can glass be a liquid if it's so hard?
by heating with silica.
-How do I know if something is an acid so I can avoid eating it?
it gives hydrogen ion when dissolves in water.
Answer:
best friends
who used to help
caring
1. 2KClO3 →2KCl + 3O2 lf 5.0 g of KCIO3 is decomposed,
a. What volume of O2 is produced of STP?
b. How many grams of KCI are produced?
2. H2SO4 + 2NaOH→ H2O + Na2SO4 How many molecules of water are produced if 2.0 g of sodium sulfate are produced in the above reaction?
3. 2AlCl3 →2Al + 3Cl2 lf 10.0 g of aluminum chloride are decomposed, how many grams of Cl2 are produced?
Answer:
Explanation:
Please mark as brainliest the question to much
How many joules of heat are absorbed to raise the temperature of 125 grams of water at 1 atm from 35°C to its boiling point, 100.°C.
Answer:
33962.5 J
Explanation:
From the question given above, the following data were obtained:
Mass (M) = 125 g
Initial temperature (T₁) = 35 °C
Initial temperature (T₂) = 100 °C
Specific heat capacity (C) = 4.18 J/gºC
Heat (Q) absorbed =?
Next, we shall determine the change in temperature. This can be obtained as follow:
Initial temperature (T₁) = 35 °C
Initial temperature (T₂) = 100 °C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 100 – 35
ΔT = 65 °C
Finally, we shall determine the heat absorbed. This can be obtained as follow:
Mass (M) = 125 g
Change in temperature (ΔT) = 65 °C
Specific heat capacity (C) = 4.18 J/gºC
Heat (Q) absorbed =?
Q = MCΔT
Q = 125 × 4.18 × 65
Q = 33962.5 J
Therefore, the heat absorbed is 33962.5 J
Who is affected over the impacts of overfishing?
Answer:
Overfishing is when people reduce a population by catching too much. The threat goes beyond damage to the ecosystem. It can result in a food crisis and loss of employment for some of around 60 million people who work directly and indirectly in the fishing industry.
Miniature golf is a game in which players hit a golf ball with a club, which causes the ball to roll along the flat ground. Three golf balls with the same mass were rolling on the ground. Each ball was hit by a golf club, but not from the same direction. All the golf balls changed speed as a result of being hit. Use the information in the diagram to answer.
Which golf ball(s) experienced the strongest force when hit? How do you know?
Answer:
The green golf ball because it changed speed the most.
Explanation:
Hope this helps! :) Plz mark brainliest again! <3
Can someone help me with the first answer ?
Extra points
Explanation:
I'm pretty sure it's; because of the invention of the microscope, scientists were able to work together to develop the cell theory.
Boiling point of the substance is directly proportional to
Answer:
The boiling point is directly proportional to the surface area which is proportional to the molecular weight.
Explanation:
Please help. Will give brainliest
help in what??????????????????
do i look phat in this dress?
Answer:
Very!
Explanation:
Very phat!
QUESTION 8
DOK 4
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Imagine that an atom of Fluorine (F) can bond with one
of the following atoms. Which one do you think it is
most likely to bond with? Why?
Lithium (Li)
Beryllium (Be)
Boron (B)
Carbon (C)
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Answer:
Li
Explanation:
F is a strongest electronegative element and it will combine with an element with low electronegativity. From the list provided, the element is Li.
Magnets are classified based upon how they occur either naturally or man made true or false
Answer:
True
Explanation:
Permanent artificial, temporary artificial and natural. They are classified by the way in which they have achieved magnetism and by how long they remain magnetic.
Which series reveals the source of energy for oil? please help ASAP!!! WILL MARK BRAINLEST
oil animals plants sun
oil animals plants chemicals
oil plants animals sun
oil chemicals animals sun
Answer:
B
Explanation:
Oil > Animals > Plants > Chemicals
i just need an explanation :) so the problem was " what is the mass of 5 molecules of water(H2O) , in grams?" my teacher said the answer is 1.50 x 10^-22 but i dont understand why. why is it not 1.50 x 10^24, why is the exponent negative?
Answer:
Explanation:
The exponent is negative because water molecules are absolutely tiny. You can't see a molecule of water on the palm of your hand with your naked eyes, right? If a the mass of a molecule was 1.50 x 10^24, it'd be HUGE... like absolutely massive (possible the size of your city). Molecules are just tiny, tiny particles