Answer:
4. If cotton plants need a consistent amount of water to grow steadily, then a cotton plant that displays steady growth will receieve 100 mL of water every day.
Explanation:
Hypotheses are written in the format of "If... then...". It should include information on both variables to arrive at a conclusion point.
When a metal such as copper is heated,it expands. Can anyone tell me what happens to the metal particles as the solid metal expands?
Answer:
The metal molecules inside start to vibrate faster, causing the solid to change to liquid if exposed to the intense temperature over a long period of time.
Explanation:
As my answer states, but for an explanation, lets say you are boiling an ice cube, it will start to turn into liquid water, that is because it has been exposed to that heat for a long period of time. The same will happen for the metal, if its exposed for long enough, it will turn into a liquid, then can be turned into a gas because the molecules are vibrating so quickly that they start to easily move apart.
Hope this helps, let me know if any more clarification is needed.
Identify one instance each of kinetic energy and potential energy
Answer:
Few Examples of Kinetic Energy
The following are typical examples of kinetic energy:
A wrecking ball used to demolish a building through utilization of the kinetic energy it possesses in motion.
Conversion of liquid water to steam, by virtue of the fast movement of the molecules of the liquid upon agitation
A golf ball after being struck off the tee
An asteroid falling towards Earth at incredible speed
A downhill skier traveling down a hill
The flow of a river
An airplane in motion (possesses a tremendous amount of kinetic energy. This is because the mass of the airplane and the velocity at which it moves are enormous)
Explanation:
Answer:
"The battery in the car has potential energy in the form of chemical energy. As the car is turned on and moves, this potential energy becomes kinetic energy."
Explanation:
Remember to change it up a bit.
state the method of collection of HCl(g)
Answer:
The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colourless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.
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A sample of a pure substance is found to have a mass of 52.11 g. Water in the graduated cylinder has a volume of 12.5 mL. When the substance is placed in the water, it sinks and the volume of water and substance now reads 31.8 mL. What is the density?
Density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it is expressed as:
[tex]Density = \frac{Mass}{Volume }[/tex]
With the above formula, we can obtain the density of the substace given in question as illustrated below:
Step 1Data obtained from the question
Mass = 52.11 g.
Volume of water = 12.5 mL.
Volume of water + Subtance = 31.8 mL
Density =? Step 2Determination of the volume of the substance
Volume of water = 12.5 mL.
Volume of water + Subtance = 31.8 mL
Volume of substance =?Volume of substance = (Volume of water + Subtance) – (Volume of water)
Volume of substance = 31.8 – 12.5
Volume of substance = 19.3 mL Step 3Determination of the density of the substance
Mass of substance = 52.11 g.
Volume of substance = 19.3 mL
Density =?[tex]Density = \frac{Mass}{Volume } \\\\Density = \frac{52.11 }{19.3}[/tex]
Density = 2.7 g/mLTherefore, the density of the substance is 2.7 g/mL
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HELP NOW ASAP‼️ Find the temperature, in Kelvin, that will dissolve 400 g of sugar in 100 g of water.
Answer:
hot
Explanation:
which of the following pair has a larger size? a)K or K- b)Br or Br- c)O2- or F- d) Li or Na
Answer:
jabvVbbnndbznnsnsksloplshebxbsnejxjevdjdjwjsjxbsjwpzbrjsjdndn
Explanation:
zusbejdnd.d
shsjsksosbejzjdhdbdjedhd
dudbskwjxbdbdjsijednjzhenejd3jdbvfbsj
susjdjksuwhwudnjwibdghejdooejejdhdbbsndjl2lekkw
help with the 3rd question plslsls I’ll brainlist.
1 - energy 2- heat 3 -plant
What did Ernest Rutherford’s gold foil experiment demonstrate about an atom?
Each atom is composed of electrons and positive material.
The mass of the atom is evenly spread throughout the atom.
Neutrons are located in the center of the atom.
Positive charge occupies a very small volume in the atom.
Answer:
I believe its the last one
Explanation:
The gold-foil experiment showed that the atom consists of a small, massive, positively charged nucleus with the negatively charged electrons being at a great distance from the centre. Niels Bohr built upon Rutherford's model to make his own.
Give an example of derived unit.
Answer:
A derived unit is a unit that results from a mathematical combination of SI base units. We have already discussed volume and energy as two examples of derived units.
PLEASE HELP. DUE TODAY
1. An atom with a _____ charge has the same number of protons and electrons.
2. An atom that has a different number of electrons and protons is called a(n) ____.
2. T or F? All atoms in an element contain an identical number of neutrons.
Answer:
Explanation:
1.An atom with a neutral charge are expected to have the same number of electrons and protons from Henry assumption (1914).
2. An atom with different number of electrons and protons are charge atom and they are called ion.
3. Yes.
You have a 9.1 ppm sodium ion (Na', 22.990 g/mol) aqueous solution. Express this in uM (umol/L).
The concentration of 9.1 parts per million of sodium in the solution is equal to 395.8 μM (molarity).
A ppm (parts per million) and M (molarity) are units of concentration. To convert ppm to μM we need to remember that:
[tex] 1 ppm = \frac{mg}{L} [/tex]
[tex] 1 M = \frac{mol}{L} [/tex]
Molar mass Na = 22.990 g/mol
Now, we can convert ppm to M as follows:
[tex][Na^{+}] = 9.1 \frac{mg}{L}*\frac{1 g}{1000 mg}*\frac{1 mol}{22.990 g}*\frac{10^{6} \mu mol}{1 mol} = 395.8 \mu mol/L[/tex]
Therefore, the concentration of sodium in the solution is 395.8 μmol/L.
You can see another example of ppm conversion to molarity here: https://brainly.com/question/13565240?referrer=searchResults
I hope it helps you!
How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of 178?
Answer:Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. The chemical symbol for Hafnium is Hf. Neutron Number and Mass Number of Hafnium Mass numbers of typical isotopes of Hafnium are 176-178, 179, 180.
Explanation:
hello!, can you please answer these
Answer:
Sunflower- The common sunflower (H. annuus) is an annual herb with a rough hairy stem 1–4.5 metres (3–15 feet) high and broad, coarsely toothed, rough leaves 7.5–30 cm (3–12 inches) long arranged in spirals. The attractive heads of flowers are 7.5–15 cm wide in wild specimens and often 30 cm or more in cultivated types.
XH2 + YN2 → ZNH3
what are The correct values for x, y and z
Answer:
hvncsdvbfnnmgfhgjhkgnbdffhfgjgfjfjgjgjgfjfgjgfjfjfgjgfjfhfdhdhdhhdgfgdhdfhfdhd
Explanation:
jfdhfdhfdhdfhhdfhdfhhdfhdfhfdhrdhdfhfhhdhdf
Why is sodium a significant source of calories in both foods
Answer: Sodium is made up of lots of salt.
Explanation:
Eating a lot of salt can cause your body to retain more water, which can show up on the scale as extra pounds. But we're not just talking about water weight here. High salt diets appear to be linked to higher body fat in particular, the kind of fat that accumulates around your middle.
Select the observations that might indicate a chemical change has occurred.
Group of answer choices
Formation of a substance in a different state
Breaking or melting
Phase change
Production of flames
Production of heat or light
Answer:
number 2 formation of substance in a different state
how do isotopes of a given element differ?
Answer:
they have different mass numbers
Explanation:
please help me with my question
Answer:
I think it should be B
Explanation:
Covalent bond is between non metals
5) A change in the state of matter is caused if enough what is added to or removed from a object.
A) thermal energy
B) kinetic energy
C) potential energy
D) force
Answer:
5) A change in the state of matter is caused if enough what is added to or removed from a object.
A) thermal energy
B) kinetic energyC) potential energy
D) force
WILL GIVE OUT BRAINLY
Which atom would be neutral?
1. An oxygen atom with 16 electrons, 18 protons, and 16 neutrons
2. An oxygen atom with 4 electrons, 6protons, and 4 neutrons
3. An oxygen atom with 8 electrons, 8 protons, and 9 neutrons
4. An oxygen atom with 9 electrons, 8 protons, and 8 neutrons
Answer:
3 is the answer
Explanation:
as the number of electrons =number of protons
so the negatively charged particles= positively charged particles
Where in Africa could you find a valley glacier?
Answer:
you can find Valley Glacier in Mount Kenya
need help
no link
in how many days does the life cycle of mosquito complete?
Answer:
it can range from 4 days to as long as a month.
Answer:
8 to 10 days take to complete life cycle of mosquito.
Which of the following statements is correct for isotopes of an element?
Help please this is due tomorrow and I have a lot to do
Answer:
pressure
Explanation:
the metore put pressure on the earth, so the earth shifted
What caused the ice cube to melt? What do you think is happening to the particles on the inside of the ice cube as it melts?
Answer:
Ice melts when heat is provided to it.
Explanation:
When heat is provided, the kinetic energy of the particles increases. The particles start vibrating. As you keep providing heat, the particles start vibrating more strongly and with greater speed. Some particles become so energetic, that they are able to break the force of attraction and move away as a liquid.
Hope this helps.
The compound XCl4 contains 75.0% Cl by mass. What is the
element X?
nch of the following
The element X is titanium.
According to the question, the percentage by mass of Cl in XCl4 is 75.0%.
The percentage by mass is obtained from;
Mass of element in the compound/molar mass of compound * 100
Hence;
Let the mass of the unknown element be X
75 = 142/X + 142 * 100
75 (X + 142) = 142 * 100
75X + 10650 = 14200
75X = 14200 - 10650
X = 14200 - 10650/75
X = 47
Hence, X is titanium.
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I NEED HELP ASAP RIGHT NOW PLEASE
Answer:
I think it's C or D Sorry if I'm Wrong
Explanation:
it just makes the most sense to me
How many centigrams are there in 8.44kg? Answer in units of cg
Answer:
84400cg
Explanation:
100000 cg in 1kg
100000(8.44)=84400cg
How do u know a guy didn’t like u ?
Answer he isn't interested in learning about you
Explanation: i hope u are okay queen
how many neutrons are in an atom of aluminum
Answer:
14 neutrons.
Explanation:
Hope this helps!
Answer: there's 13
Explanation:
