Answer:
The melting and boiling points of molecular compounds are generally quite low compared to those of ionic compounds. This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy required to break the ionic bonds in a crystalline ionic compound (Figure 6.2. 1) .
Explanation:
hopefully this helps :)
if not then here. (Most of the time, the melting points of ionic compounds are very high compared to the melting points of molecular compounds.)
Answer: A. Molecular compounds tend to have lower melting points
Explanation:
Revise this statement to make it true:
Running water makes rock edges very sharp and pointy.
NEED HELP NOW PLEASE!! WHOEVER ANSWERS FIRST GETS BRAINIEST!!! No links or I’m reporting your answer.
Answer:
Running water makes rock edges very dull because of erosion.
Explanation:
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Scientists are trying to control the Maillard reaction by?
Answer:
Intervention of Maillard reactions by the addition of natural and synthetic chemical compounds has previously been directed toward removing one of the reactants (the amino groups or the reducing sugars) or adding sulfur-containing compounds, such as sulfur dioxide or N-acetyl cysteine, which inhibit the reactions
Explanation:
What is the total number of grams of solute in 500 milliliters of 1M CH3COOH (formula mass = 60)?
Answer:
30 grams
Explanation:
Molarity of a solution represents its molar concentration, and can be calculated by using the formula as follows:
Molarity (M) = number of moles (n) ÷ volume (V)
Based on the information provided, volume of solution = 500 milliliters, molarity = 1M
Volume of solution in liters = 500mL ÷ 1000 = 0.50L
Molarity = n/V
1 = n/0.50
n = 0.50moles
Using mole = mass/molar mass
Molar mass of CH3COOH (acetic acid) = 60g/mol
Mass = mole × molar mass
mass = 0.50 × 60
mass = 30 grams.
If you are given 608 grams of calcium phosphate Ca3(PO4)2, how many moles would you have? *
Answer:
You would have 1.96 moles.
Explanation:
You are given 608 grams of calcium phosphate Ca₃(PO₄)₂.
Molar mass (M) is the amount of mass that a substance contains in one mole. This substance can be an element or a compound.
Since the molar mass of the compound Ca₃(PO₄)₂ is 310 g / mole, and taking into account the definition of molar mass, you can apply the following rule of three: if 310 grams of Ca₃(PO₄)₂ are contained in 1 mole, 608 grams of the compound in how many moles are present?
[tex]moles=\frac{608 grams* 1 mole}{310 grams}[/tex]
moles= 1.96
You would have 1.96 moles.
In ADEF, the measure of F=90°, the measure of ZD=10, and EF = 94 feet. Find the
length of DE to the nearest tenth of a foot.
Answer:
answer. the measure. is f=90 the equbaliint is 180
Explanation:
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The theoretical yield of a reaction is 44 g. The actual yield was 34 g. What is the percent
yield?
Answer:
77%
Explanation:
percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.
34/44 = 0.77
0.77 x 100 = 77%
What effect does pollution have on condensation? A There are more particles in the air for water vapor to cluster around. B Areas with more pollution have more clouds and rain. C Pollution creates more ground level clouds. D It is harder for the sun to warm up the water vapor.
Answer:
A There are more particles in the air for water vapor to cluster around.
Explanation:
As the condensation process takes place more particles are added to the atmosphere for water vapour and condensation further leads to the build-up of clouds. If the sky is polluted with pollutants the condensation can raise the level of pollution by blocking the rays of the sun from reaching the ground. This affects the visibility of most of the cities.Directions: Show all of your work for each of the following problems.
3. What is the % Ba in Ba(NO3)2?
4. What is the % of each element in Ni3(PO4)2?
5. What is the % of each element in Al2(CrO4)3?
6. What is the % of each element in (NH4)2(SO4)?
Answer:
3.Ba=24.Ni=2...PO4=35.Al=3...CrO4=26.NH4=1...SO4=2in general how are natural resources and population size related
Answer:
The magnitude of the threat to the ecosystem is linked to human population size and resource use per person. Resource use, waste production and environmental degradation are accelerated by population growth.
helpppppppppppppp!!!!!!!!!!!!!how did chlorine atom attain saturation in potassium chloride and oxygen dichloride
1. 2.00 L of gas is at 740 mm Hg. What is its volume at standard
pressure?
0.16
Explanation:
when you divided 1.2.00 with 740 you get this number.
Which of the following describes experiences initiated spontaneously by children as they go about their daily activities?
Naturalistic experiences
Informal learning experiences
Structured learning experiences
Disorganized experiences
Answer:
naturalistic
Explanation:
What is the main function of the part labeled Yin the model?
Answer:
The part labelled Y is the chloroplast and its main function is to produce food for the plant in the reactions of photosynthesis.
Explanation:
Plants are autotrophic organisms in that they are able to manufacture their own food. Plants are able to manufacture their own food due to the presence of the cell organelle known as the chloroplast. The plant chloroplast has its own DNA and can reproduce independently, from the rest of the cell. They can as well produce amino acids and lipids required for the chloroplast membrane.
Chloroplasts are green-colored membrane-bound organelles found within the plant cell. Their green color is due to the presence of the pigment, chlorophyll. Chlorophyll in the chloroplasts are responsible for absorbing light energy from sunlight and using this absorbed energy to make simple sugars (carbohydrates) from carbon (iv) oxide and water. This is the main function of the chloroplasts in plant cells.
Photosynthesis occurs in the chloroplasts in two reaction steps:
1. The light reaction - involves the splitting of e=water molecules using the energy of sunlight
2. The dark reactions - carbon (iv) oxide from the air is used to produce sugars.
The water cycle describes the continuous movement of water on earth. Which part of the water cycle is directly responsible for returning water to the soil
Answer:
mmmh..
Explanation:
sorryy id really ñike to help but i just dont know it...
What is the mass of water released by the heating? Show your work or explain your reasoning.
Answer:
Dividing the mass of the water lost by the original mass of hydrate used is equal to the fraction of water in the compound. Multiplying this fraction by 100 gives the percent water in the hydrate.
Explanation:
The amount of water throughout the compound has been determined by dividing the mass of water wasted mostly by original quantity of hydrate used. The above fraction can be multiplied by 100 to get the hydrate's water content in percentages.
What is mass ?The proportion of matter that makes up an object is quantified by its mass. The kilogram, or kg, would be the fundamental SI unit of mass.
What is hydrate?Any substance that contains water through the form of H2O molecules is referred to as a hydrate. This water content by weight can vary, but it is typically fixed. The most well-known hydrates seem to be crystalline solids which decompose once the attached water is removed.
Therefore , The amount of water throughout the compound has been determined by dividing the mass of water wasted mostly by original quantity of hydrate used. The above fraction can be multiplied by 100 to get the hydrate's water content in percentages.
To know more about mass and hydrate.
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Please help will mark brainliest!! What is the main point of paragraph 3?
Answer:
the highest frequency
Explanation:
How many moles of water are contained in 0.250 mole
of CuSO4.5H2O?
A) 1.25 B) 4.50 C) 40.0 D) 62.5
Answer:
C. 40
Explanation:
there are 40 moles of water in a 0.250 mole. use the formula to find out
40.0 = 40.0 + 0
What animal did this person tes
on to see if the air was pure
nitrogen?
Answer:
DONT CLICK THAT LINK THAT'S A SCAM AND A VIRUS PLEASE LISTEN
Explanation:
Briefly describe each of the suns layers. I’ll give brainless
Answer: The inner layers are the Core, Radiative Zone and Convection Zone.
The outer layers are the Photosphere, the Chromosphere, the Transition Region and the Corona.
Nuclear fusion of hydrogen in the core of the Sun produces tremendous amounts of energy that radiate out from the Sun.
The corona is the outermost layer of the Sun, starting at about 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the corona is 500,000 K (900,000 degrees F, 500,000 degrees C) or more.
The chromosphere is a layer in the Sun between about 250 miles (400 km) and 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the chromosphere varies between about 4000 K at the bottom (the so-called temperature minimum) and 8000 K at the top (6700 and 14,000 degrees F, 3700 and 7700 degrees C), so in this layer (and higher layers) it actually gets hotter if you go further away from the Sun, unlike in the lower layers, where it gets hotter if you go closer to the center of the Sun.
The photosphere is the deepest layer of the Sun that we can observe directly. It reaches from the surface visible at the center of the solar disk to about 250 miles (400 km) above that. The temperature in the photosphere varies between about 6500 K at the bottom and 4000 K at the top (11,000 and 6700 degrees F, 6200 and 3700 degrees C)
(phew! There you go!)
What volume of Nitrogen measured at s.T.P. Will be produced on heating 33.8g of calcium trioxonitrate
Answer:
9.2288 L
Explanation:
The equation of the reaction is given as;
2 Ca(NO3)2 → 2 CaO + 4 NO2 + O2
From the reaction;
2 mol of Ca(NO3)2 produces 4 mol of NO2
Converting 33.8g to Number of moles;
Number of moles = Mass / Molar mass
Number of moles = 33.8 g / 164.088 g/mol
Number of moles = 0.206 mol
2 = 4
0.206 = x
Solving for x;
x = 0.206 * 4 / 2
x = 0.412 mol
At STP;
1 mol = 22.4 L
0.412 mol = x
Solving for x;
x = 0.412 * 22.4 = 9.2288 L
Determine if the following would be a buffer system.
H3PO4 and NaH2PO4
H3PO4 and Na2HPO4
sorry i dont know Explanation:
Which is true regarding the density of air?
o
Plants rely heavily on _______
in the nitrogen cycle to incorporate nitrogen into organic come pounds
1 oxygen
2 viruses
3 bacteria
4 fungi
Answer:
3. Bacteria
Explanation:
If you don't trust me, search it up!
what is the function of a prism
Answer:
Prisms are sometimes used for the internal reflection at the surfaces rather than for dispersion. If light inside the prism hits one of the surfaces at a sufficiently steep angle, total internal reflection occurs and all of the light is reflected.
Explanation:
Prism, in optics, piece of glass or other transparent material cut with precise angles and plane faces, useful for analyzing and reflecting light. An ordinary triangular prism can separate white light into its constituent colours, called a spectrum.
can someone help me ????
Answer:
B) Lithium
C) Barium
F) Potassium
Explanation:
All of the above are Inorganic Compounds.
Answer:
[tex]\boxed {\boxed {\sf Cobalt, Iron, and \ Copper}}[/tex]
Explanation:
The Stock System states that In a chemical formula or equation, some metals need a roman numeral after their symbol. If a metal has multiple oxidation states, it needs a roman numeral.
Use the Periodic Table to see the oxidation states for each metal.
Cobalt (Co): +3, +2 Lithium (Li): +1 Barium (Ba): +2 Iron (Fe): +3, +2 Copper (Cu): +2, +1 Potassium (K): +1We can see that cobalt, iron, and copper have more than one oxidation state, so they would require a roman numeral.
6) 3.2 grams of sodium chloride is dissolved to make 0.25 liters of solution. Hint Convert grams to moles first! Molar mass of NaCl is 58.5 g/mol
Which solution is the least concentrated?
O 2 moles of solute dissolved in 4 liters of solution
The change in water from the solid ice to a liquid is an example of a
Answer:
When solid ice gains heat, it changes state from solid ice to liquid water in a process called melting. Ice cubes in a cold drink, for example, gradually melt. This process is called evaporation. Water vapor (steam) mixes with the air and seems to disappear.
Answer:
melting
when solid ice gains heat, it changes state from solid ice to liquid water in a process called melting
this is correct answer
I hope it's helpful for u ...
Sorry for spamming but this is due tomorrow! Can someone help me please!!
Answer:
1. in the Northern Hemisphere the vernal equinox falls about March 20 or 21, as the Sun crosses the celestial equator going north. In the Southern Hemisphere the equinox occurs on September 22 or 23, when the Sun moves south across the celestial equator.
Explanation:
Hope this helps ^^
Many ski resorts and mountain cities can be reached directly by planes which deposit travelers a mile or more above sea level. This can result in altitude sickness due to hypoxemia, or reduced oxygen in the blood, caused by the unaccustomed exposure to the lower atmospheric pressure at high elevations. On a given day, the prevailing atmospheric pressure in Albuquerque, NM (elevation 1620 meters) might be 0.799 atm. Calculate this pressure expressed in mmHg and in torr. Relationship between altitude and barometric pressure.
Answer:
See explanation
Explanation:
To convert from atm to mmHg
1 atm = 760 mmHg
0.799 atm = 0.799 atm * 760 mmHg/1 atm = 607.24 mmHg
To convert from atm to torr
1 atm = 760 torr
0.799 atm = 0.799 atm * 760 torr/1 atm = 607.24 torr
Which element is the excess reagent when 3.00 moles of Mg is ignited in 2.20 moles of pure oxygen
in the reaction below?
2Mg + O2 -> 2MgO
Answer:
Oxygen is in excess.
Explanation:
The coefficients of the balanced equation create a mole ratio that shows the ratio of how many reactants are used up and products are created.
The mole ratio of Mg to O2 in this equation is 2:1, which means that for every two moles of Mg used, there will be 1 mole of O2 used.
If we have 3.00 moles of Mg, we will only need 1.5 moles of oxygen to completely burn the Mg. Therefore, when all 3.00 moles of Mg are used, there will still be some of the 2.20 moles of oxygen remaining.
Oxygen is in excess reagent when 3.00 moles of Mg are ignited in 2.20 moles of pure oxygen.
The coefficients of the balanced equation create a mole ratio that shows the ratio of how many reactants are used up and products are created. The mole ratio of Mg to O2 in this equation is 2:1, which means that for every two moles of Mg used, there will be 1 mole of O2 used.If we have 3.00 moles of Mg, we will only need 1.5 moles of oxygen to completely burn the Mg. Therefore, when all 3.00 moles of Mg are used, there will still be some of the 2.20 moles of oxygen remaining.Learn more about Oxygen
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