Answer: c
Explanation:
i think the answer is c
Elements in the same _____ on the periodic table have the same number of valence electrons.
KNO, + H.CO, – K. CO, + HNO
Answer:
Just Try ur best ok
Explanation:
How is heat transferred when a person steps on hot sand?
O A. From the sand to the feet
O B. In both directions between the sand and the feet
C. From the feet to the sand
O D. Heat is not transferred.
Answer:
Explanation:
Heat moves from hot sand to the bottoms of your feet by conduction. Conduction is the transfer of heat between objects that touch each other.
Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.
What is Conduction ?Heat conduction is a phenomenon that occurs through the interaction of neighbouring atoms and molecules, transferring their energy/heat (partially) to their neighbours.
This is the most significant means of heat transfer within a solid and between solid objects in thermal contact.
Conduction is the transfer of heat between objects that touch each other.
Therefore, Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.
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The circumference of the earth is 25,000 mi at the equator. What is the
circumference in km?
Answer:
40233.6
hope this helps
plz mark brainleist
Which of the subatomic particles are responsible for the differences in isotopes?
Protons
Electrons
Atoms
Neutrons
Answer: Neutrons
Explanation:
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.
Answer:
neutrons
Explanation:
isotopes has the same proton number but different nucleon number because there's different numbers of neutrons in isotopes
Water and salt are compounds made of the combination of more than one type of atom. Which statement is false?
A. Because they they are are compounds, compounds, they they cannot cannot be be pure pure substances.
B. Both compounds compounds are are considered considered pure pure substances.
C. These compounds compounds have have specific specific physical physical properties properties that that never never change.
D. These compounds compounds have have distinct distinct chemical chemical properties.
Compounds are made of the various elemental atoms joined together. Water and salt are compounds that can be present in their pure form. Thus, option A is false.
What are compounds and pure substances?A compound is a substance formed by the bond between the atoms of the elements that shares, transfers, donates, or gains electrons to join and interlink chemically.
The pure substance is characterized by the presence of only a single type atom of the element. They have invariability and can exist in various phases with constant composition.
Water and salt are compounds made of two or more atoms of different elements that have specific physical properties and distinct chemical properties.
Therefore, option A. the compounds cannot be pure substances is false.
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PLEASE ANSWER ASAP!
For her school Science ft Alyssa designs an experiment to learn more about
erosion. Her experimental set up is shown below
Using the illustration shown above, determine which of the following statements best
describes the independent variable itest variable). this experiment:
A The speed she pours the water, since it is the same for all trials.
B The amount of water she pours, because the amount she pours is the same.
C The height of the tray, because this is a change that may cause and effect on the experiment.
D The mass of sand that collects at the bottom of the tray, because this is what is being measured or observed.
Answer:A
Explanation:
To do the experiment
The experimental setup is the part of the scientific method that is done to prove the hypothesis. The test variable of the experiment is the height of the tray as it may cause an effect. Thus, option C is correct.
What is the independent variable?The independent variable has been the test variable that does not depends on other variables and is manipulated by the researcher. It has no fixed value and parameter and is subject to alteration so as to cause an effect on the other variable.
The height of the tray is the independent variable and the mass of the sand is the dependent variable. The height affects the mass of the sand eroded at the bottom. The speed and amount of water have been the controlled variable.
Therefore, option C. the height of the tray with the sand is the independent variable.
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What is the noble gas configuration for Cobalt?
a
[Ar] 4s2 3d7
b
[Ar] 4s2 4d7
c
[Kr] 4s2 4d7
d
[Kr] 4s2 3d7
Answer:
a. [Ar] 4s2 3d7
Explanation:
Count the atoms of each element.
5(NH) P
5
10
15
20
30
40
50
60
70
Nitrogen
o
o
O
O
O
O
o
Hydrogen
O
O
O
O
Phosphorus
O
O
O
O
O
Answer:
Nitrogen = 15
Hydrogen = 60
Phosphorus = 5
Answer: uh
Explanation:
which object would require the most amount of energy, or force, to set it to motion?
a. school bus
b. refrigerator
c. microwave
d. houseplant
1. Clouds form when water changes from a
A gas to liquid .
B liquid to gas.
C solid to gas
D solid to liquid.
Answer:
A. Gas to liquidExplanation:
I think the answer is A. gas to liquid. This is the correct answer... If you like this answer mark this answer as BRAINLIEST answer..Thank you ☺️☺️
What happens immediatesly after you dissolve acid in water? Positively charged hydrogen atoms are released. Positively charged hydrogen atoms are released. Negatively charged hydrogen atoms are released. Negatively charged hydrogen atoms are released. Hydronium ions are released. Hydronium ions are released. Neutrally charged hydrogen atoms are released. Neutrally charged hydrogen atoms are released.
Answer:
The correct answer is A.
Explanation:
The acids with hydrogen atoms in them are the ones that dissolve best in water and when they do, they get diluted, raising their pH level by releasing hydrogen ions (H+) into the solutions.
So when acids get dissolved in water, positively charged hydrogen atoms are released.
The answer is A.
I hope this helps.
List 3 problems that can be solved with magnets
Answer:
- Failed internal wiring
- reaching a hard to get metal item
- keeping a item on a metal surface
Explanation:
Please give me BRAINLIEST :))
period 6, group 12 (2B)
Answer:
mercury or Hg
Explanation:
i looked at the periodic table haha
hope this helps and is right <3
some help would be very much appreciated !!
Answer:
a = 6 m/s².
Explanation:
If we have the object with mass of 75 kg and force on it is 50 N then according to given statement its acceleration is 3m/s².
When we double the force on same object by keeping the mass constant then the acceleration will also double. It means force will be 100 N and acceleration will be 6 m/s².
But if we we increase the mass then acceleration goes to decrease.
So,
mass = 75 kg
F = 50 N
a = 3m/s² then by double the amount of force,
mass = 75 g
F = 100 n
a = 6 m/s².
This is actually explain the newton second law. This law stated that the acceleration of object is depend upon its mass and force acting on it.
F= m. a
a = F/m
Thus acceleration is directly proportional to the force and inversely proportional to the mass.
What are The two types of wave interference
Answer:
transverse and longitudinal
Answer:
Its constructive and destructive
Explanation:
Explanation:
The atmospheric pressure on a mountain is 550 mmHg and 1 atm is equal to 760mmHg. What is the pressure in atm? Give your answer to 2 significant figures atm
A car travels 100 m while decelerating to 8 m/s in 5 s.
initial speed is 32
b) What was it's acceleration?
What is the movement of particles in gas?
Answer:
The movement is random
Explanation:
When a trumpet was played, a nearby sheet of paper began to move.
What caused the paper to move? *
Answer:
Air from the trumpet moved it
Explanation:
What is the mass of a dolphin swimming at 16 m/s with a momentum of 800 kg m/s?
Answer: 50 kg
Explanation: formula is
m= p/v
m=800 kg m/s : 16m/s
m= 50kg
idk tho hope this helps
What are the characteristics of metals vs. non metals?
Answer:In the picture
Explanation: None
Fe(s) + O2(g) Fe3O2 (s)
Answer:
Fe2O3
Explanation:
if we have to answer whether it is wrong or correct then it is wrong because the correct answer would be Fe (s) + O2 (g) = Fe2O3 (s) because the valences will be exchanged
what is the diference between weather. and climate
Answer:Whereas weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates. ... Weather tells you what to wear each day. Climate tells you what types of clothes to have in your closet.
Explanation:well bc i am in 10th grade this kinda easy lol hoped i helped
Answer:
Explanation:
Weather is the current state of weather while, climate is the most common weather of that region over a time of 30 years.
You would like to find the density of an unusually shaped piece of jewelry. Since the piece of jewelry has an irregular shape, you need to use displacement to calculate the volume. In a 300 ml beaker you pour 200 ml. Of water. When you place the piece of jewelry in the beaker, the water level rises to 278 ml. Upon placing the object on the triple beam balance, you find that it weighs 122 grams. Given this information, calculate the density. SHOW YOUR WORK
Volume displaced by jewelry, V = 278 - 200 = 78 ml
Also, 1 ml = 1 cm³
We know, by water displacement method the volume of water displaced by an object it equals to its own volume.
So, volume of jewelry, V = 78 ml = 78 cm³.
Also, weight of jewelry is , w = 122 gm.
Now, we know density is given by :
[tex]d=\dfrac{w}{V}\\\\d=\dfrac{122\ gm}{78\ cm^3}\\\\d=1.56\ gm/ cm^3[/tex]
Hence, this is the required solution.
1. How many protons?
2. What is the atomic number?
3. What element is this?
4. How many neutrons?
5. What is the mass number?
6. What is the isotope?
Answer:
1) 5 protons, 2) 5, 3) boron, 4) 6 Neutrons, 5) 10.811 ≈ 11, 6) Boron-9
Find the speed of the ATV that goes 60 miles in 2 hours._______________________ m/hr
Given parameters:
Distance of ATV = 60miles
Time = 2hrs
Unknown:
Speed = ?
Solution:
Speed is a scalar quantity. It has magnitude but no direction. Mathematically, speed is distance divided by time.
Speed = [tex]\frac{distance}{time}[/tex]
Input the parameters;
Speed = [tex]\frac{60}{2}[/tex] = 30miles/hr
The speed of the ATV is 30miles/hr
Sara slides down a playground slide. How will friction affect her as she slides?
Answer:
Friction is a force that occurs whenever two objects rub against each other, such as a slide and a person's backside. Without friction, a slide would accelerate the rider too quickly, resulting in possible injury. Certain materials called lubricants can reduce the effects of friction. This is why water park slides are much faster than playground slides; the water acts as a lubricant. Sitting on wax paper can also reduce the amount of friction.
Explanation:
How many elements are present in the compound?
Mg2As3COHNi2
Answer: 6
Explanation: none needed lol
Could someone please tell show me steps to solve this, I am so confused.
9.80 grams of magnesium metal react with excess hydrochloric acid, and 29.8 grams of magnesium chloride are produced
by the reaction. What is the percent yield of this reaction?
Mg + HCI –> MgCl2 + H2
And this is y I should of paid attention in that one science class in middle school that taught this...
(￣▽￣;)
