Answer:
an animal that transfers pollen from flower to flower
Explanation:
think of a bee, bees move from flowers to flowers dropping pollen places and then it helps the plants grow.
Answer:
an animal that transfers pollen from flower to flower
Explanation:
Have a good day or night!
What is mass of 1.25 mol of H2?
H=1.01
Answer:
5/4 I think this is my first anser
When describing a solution, which of the following statements are true:
A) one substance is dissolved into another C) requires chemical separation
B) heterogeneous D) always involves the combination of a solid with a
liquid. E) All of these descriptions are true
Answer:
E) All of these descriptions are true
Which pair of substances would be easy to separate using distillation?
A. Water and alcohol
B. Suger and salt
C. Oil and water
D. Sand and gravel
Answer: A
Explanation:
what statement best describes a mole
a- it is use mainly for writing chemical formulas
b- it is used for chemical equations that have reversible reactions
c- it is used for direct comparing the amounts of substances
d- it is used mainly for dealing with fluid substances
Moles are the unit of measurement that estimates the amount of the substance in a sample. It directly compares the amounts of substances. Thus, option c is correct.
What are moles?Moles are said to be the SI unit to estimate the number of substances like atoms, molecules, ions, etc., in a sample. It is used to measure the elementary entities that are small in size.
It is abbreviated as mol and is equivalent to 6.02214076 × 10²³ particles (Avogadro number). It can be calculated by mass and the molar mass of the substance and is shown as,
Moles (n) = mass ÷ molar mass
Where mass is given in grams and molar mass in grams/ mol.
The moles are used to estimate the molarity and are also used in the ideal gas equation. The moles will be more in the substance with less molar mass and vice versa.
Therefore, option c. moles directly compares the amounts of substances.
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Based on the descriptions in the passage, which scientist proposed a model of the atom that matches the
diagram?
Answer:
J. J. Thomson
Explanation:
This is called the plum pudding model which was proposed by J. J. Thomson.
If 10.0g of powdered iron is heated with 10.0g of sulfur in an open crucible, what is the mass of iron (II) sulfide that is formed? What mass of excess reactant is leftover? The reaction is as follows: Fe+S8–> FeS
Answer:
See Explanation
Explanation:
8Fe + S₈ => 8FeS
Given: 10g 10g
moles 10g/56g/mol 10g/256g/mol
= 0.179mol Fe = 0.039mol S₈
Reduce => divide mole values by respective coefficients; smaller value is Limiting Reactant.
0.179/8 = 0.022 0.039/1 = 0.039
=> Fe is limiting reactant
8Fe + S₈ => 8FeS
Given: 10g/56g/mol 10g/256g/mol
= 0.179mol = 0.039 mol 0.179mol FeS produced
1/8(0.179)mol S₈ used (coefficients are equal,
= 0.022 mol S₈ used => moles Fe = moles FeS)
= (0.039 - 0.022)mol S₈ = 0.179mol FeS
remains in excess =(0.179mol)(88g/mol)
= 0.0166 mol S₈ (excess) = 15.8 g FeS
= (0.0166mol)(256g/mol) (Theoretical Yield)
= 4.26g S₈ in excess
Balance the equation by putting the correct number in front of each compound. You can work this out mathematically or by drawing pictures on a piece of paper like the videos.
NH3 --> H2 + N2 ammonia dissolving
Answer:
2NH3 --> 3H2 + N2
Explanation:
It's hard to explain how I got these coefficients but I recommend watching Tyler DeWitt on Youttube. He explains tons of chemistry concepts in an easy and clear way. I always watch his videos when I don't understand something.
I would type in "How to balance chemical equation" by Tyler DeWitt
HELP PLEASEEEE!!!!!!!!
Nitrogen (N)) reacts with hydrogen (H) to produce ammonia (NH3). Represent this reaction in terms of:
Particles
b. Moles
C. Mass
Answer:
C the answer is c
Explanation:
ITS C
AN ARRANGEMENT OF ELEMENTS INTO ROWS and columns according to similiarties in their properties
Answer:
Periodic table of elements
Explanation:
Help! ASAP! Please on the questions
Answer:
62.15 m (squared)
Explanation:
We know that the Area of the square is 5.5 x 4= 22
so 90 degree to 30 degree is divide by 3
so u divide 22 by 3 and get 7.3 wich is the semi circle thing
now 7.3 x 5.5 = 40.15
22 + 40.15 = 62.15 m (squared)
Look im not really sure but I think this is the answer
Please mark as brainliest
Have a great day, be safe and healthy
Thank u
XD
Answer:
1. The area of the rectangle is 22 but I'm not sure the area of the shape above sorry.
A. 28 m
B. 672 m
Explanation:
A. 6 + 6 + 8 + 8 = 28 or 2(6+8) = (2)14 = 28
B. 28 * 24 = 672
Octopus and squids breathe through
Octopus and squids breathe like fishes they breathe from gills
so even octopus and squids breathe through gills too.
maybe this answer would help u
Which of the following will increase the rate of a chemical reaction?
OA.
decreasing the experimental temperature
OB.
increasing the surface area of the reactants
OC.
decreasing the concentration of the reactants
D.
all of these
Answer:
answer is b
Explanation:
What do the planets Earth and Mars have in common?
A Presence of an atmosphere and a gas surface composition
B Presence of an atmosphere and a rock surface composition
C Presence of moons and rings
D Presence of rings but no moons
Answer:
the answer is D
Explanation:
because I had a test that had this question and I got it correct
Which of the following best explains what happens when salt dissolves in water?
Answer:
The answer Is the polar solvent molecule surrounds the positive sodium ions and the negative chloride ions.
The highly polar molecule covers the positive ions of sodium as well as the negatives chloride ions whenever salt dissolves in water.
What is solubility?The ability of a material, the solute, to combine with that other substance, the solvent, is known as solubility in chemistry. Insolubility, or the solute's inability to create such a solution, is the opposite attribute. The concentration of both the solute inside a saturated solution—a solution whereby no more solute could be dissolved—is typically used to gauge the degree of a substance's solubility in a particular solvent.
For some solutes as well as solvents, there might not be any such limit, in whose case these two substances are referred to as "miscible in any quantities". The highly polar molecule covers the positive ions of sodium as well as the negatives chloride ions whenever salt dissolves in water.
Therefore, the highly polar molecule covers the positive ions of sodium as well as the negatives chloride ions whenever salt dissolves in water.
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calculate the formula unit mass of CaCl2
80 points to whoever ACTUALLY solves ALL 4!!
It has something to do with boyle’s/charle’s/G-L/Combined Gas Laws
I’m super lost and I’ve been working on this for nearly 2 hours!
Answer:
See Explanations
Explanation:
The Empirical Gas Laws include ...
Boyles Law => P₁V₁ = P₂V₂
Charles Law => T₁/V₁ = T₂/V₂
Gay-Lussac's Law => P₁/T₁= P₂/T₂
Avogadro's Law => V₁/n₁ = V₂/n₂
Combined Gas Law => P₁V₁/T₁ = P₂V₂/T₂
Ideal Gas Law => PV = nRT; R = 0.08206 L·Atm/mol·K
One only needs to learn the 'Combined Gas Law' in that it embodies all of the gas law problems.
Start with a simple table for P, V & T and enter given data. If a variable is not given, assume it is constant. Set up P₁V₁/n₁T₁ = P₂V₂/n₂T₂ and substitute given data. Solve for unknown.
Your Problems:
1. P₁ = 1 Atm P₂ = 3 Atm
V₁ = 300ml V₂ = ?
T₁ = Constant T₂ = T₁
n₁ = Constant n₂ = n₁
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (1Atm)(300ml)/(Constant)(Constant) = (3Atm)(V₂)/(Constant)(Constant)
=> (1Atm)(300ml) = (3Atm)V₂
=> V₂ = (1Atm)(300ml)/(3Atm) = 100ml
2. P₁ = 1 Atm P₂ = ?
V₁ = Constant V₂ = V₁
T₁ = 273K T₂ = 82K
n₁ = Constant n₂ = n₁
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (1Atm)(Constant)/(273K)(Constant) = (P₂)(Constant)/(82K)(Constant)
=> (1Atm)/(273K) = (P₂)/(82K)
=> P₂ = (1Atm)(82K)/(273K)
=> P₂ = 0.3 Atm (1 sig-fig)
3. P₁ = 101.25kPa P₂ = 506kPa
V₁ = 5 Liters V₂ = ?
T₁ = Constant T₂ = T₁
n₁ = Constant n₂ = n₁
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (101.25kPa)(5L)/(Constant)(Constant) = (506kPa)(V₂)/(Constant)(Constant)
=> (101.25kPa)(5L) = (506kPa)(V₂)
=> V₂ = (101.25kPa)(5L)/(506kPa)
=> V₂ = 1.00 Liter
4. P₁ = Constant P₂ = P₁
V₁ = 3.2 Liters V₂ = ?
T₁ = 273°C + 273 = 546K T₂ = 400°C + 273 =673K*
n₁ = Constant n₂ = n₁
*Note => be sure to convert all temps to Kelvin when working empirical gas law problems. K = °C + 273
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (Constant)(3.2L)/(Constant)(546K) = (Constant)(V₂)/(Constant)(673K)
=> (3.2L)/(546K) = (V₂)/(673K)
=> V₂ = (3.2L)(673K)/(546K)
=> V₂ = 3.944 Liters ≅ 3.9 Liters (2 sig-figs)
Transferring charge by touching or rubbing is called-
A) charging by contact
B) convection
C) insulation
D) none of these
Answer:
A) Charging by contact
Explanation:
Transfer of heat by direct contact, Heat energy is conducted from the hotter medium to the cooler medium
Ice was heated at a constant rate. Eventually all ice changes to gas.
What change of state occurs between 200 and 750.
Answer:
100°C And will be same. Your best bet is to calculate your answer. Explanation:
Which of the following measurements has three significant figures?
A. 5100 m
B. 0.005 m
C. 0.510
D. 0.051
The correct answer is C: 0.510 m
N I C E - D A Y!
Answer:
C
Explanation:
a) has 2 sig. figures
b) has 1 sig. figures
c) has 3 sig. figures
d) has 2 sig. figures
What is the formula of cell respiration? (In a science equation)
Answer:
Hey mate....
Explanation:
This is ur answer.....
Equation : Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O.
Hope it helps u,
Mark me as the brainliest....
FOLLOW ME!!!!
Answer:
C6H12O6 + 6O2 → 6CO2 + 6H2O.
Explanation:
True or False :The product of a chemical reaction is always different than the original reactants.
Answer:
True
Explanation:
PLEASE HELP ILL GIVE BRAINLIEST
What do you think will happen if the experiment from the video kept running? Explain with vocabulary words from the
chapter.tinyurl.com/AMPTE-05
Answer:
Since the temperature of the water made the air hot, i believe that after the video if the experiment continued it would have just made the air a little warmer but not too hot.
Explanation:
How many ATOMS are in 7.32 moles of sulfur
dioxide?
do i look phat in this dress?
Answer:
Very!
Explanation:
Very phat!
Identify the reactants in this reaction.
o carbon dioxide, water, and sodium acetate
O baking soda and vinegar
DONE
Explanation:
When mixed together, baking soda and vinegar undergo a chemical reaction. Carbon dioxide, water, and sodium acetate are formed during the reaction.
Answer:
It’s baking soda and vinegar
And the products in the reaction are carbon dioxide, water, and sodium acetate
Explanation:
Trust
CAN SOMEONE PLEASE SEND ME A GOOD PICTURE OF A WATER CYCLE WITH ALL THE THINGS THAT HAPPEN IN A WATER CYCLE PLS HELP ME FAST!!!(because I need to draw it for class and I can find good pics, btw they didn’t have the subject science so yea)
Here you go I hope this helps
This pizza is a delicious combination of a bread crust, tomato sauce, cheese, and meat. Like all nutritious foods, this pizza provides energy for all of the body's activities. HELP ME PLS
1. Where do you think the energy in each of these four food groups comes from? How confident are you with your prediction?
Answer: pizza crust, Vegetables, Dairy, Meat, and Dairy
Explanation:
The pizza crust is important, not only to deliver those mouthwatering toppings to your anxiously waiting taste buds, but to provide vital nutrients from grains. Vegetables are a common and delicious topping for pizza. These toppings provide an array of nutrients and including multiple servings of vegetables in your diet every day is a necessary part of a healthy lifestyle. If you get meat on your pizza, it is an excellent source of protein. All meat is high in protein and iron, which are necessary to build muscle. Cheese is a good source of the calcium we all need for strong bones and teeth. Cheese is also a good source of protein.
A bread crust contains carbohydrate, vegetables contains vitamins, cheese contain calcium and protein, meat contain protein.
What are nutrients?Nutrients are the substance that makes a body healthy.
Food material contain different nutrients that help in growth of the body.
In pizza, we get all type of nutrients
A bread crust contains carbohydrate which provide energy.
Vegetable contains vitamins to keep the body parts healthy.
Cheese contain calcium and protein which maintain the growth and repairing of the body.
Meat contain protein, good for muscles.
Thus, A bread crust contains carbohydrate, vegetables contains vitamins, cheese contain calcium and protein, meat contain protein.
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The picture below shows xylem and phloem vessels, which are tube-
like structures in a plant's roots and stems. Phloem is adapted for
transporting the glucose made during photosynthesis to the roots and
stems.
Phloem
Xylem } Vascular
stem
τρος
Xylem
Phloem
Which function is xylem specifically adapted to perform in plants?
(7.12A)
A
It helps prevent wer loss
B
It transports water from the roots to the leaves
с
It exchanges gases with the atmosphere
D
It captures sunlight for photosynthesis
Answer:
B
Explanation:
it transports water from roots to the leafs
Can you…Balance a chemical equation using the relationships identified?
Answer:
A balanced chemical equation not only describes some of the chemical properties of substances—by showing us what substances react with what other substances to make what products—but also shows numerical relationships between the reactants and the products.
What is the chemical formula for dinitrogen monoxide?
А
NO
B
NO
С
2NO2
D
N20
Answer:
N20
Explanation: