Answer:
8.801×10^-18 moles Ca
Explanation:
5.3 X 10^6atoms* (1mol/6.022*10^23) = 8.801×10^-18 moles Ca
If D is neutral liquid, which of the following is C
heat
MgCO3
(A) + (B)
C с
MgCl2 + (D)
Answer:
Cl2
Explanation:
Bcs in product there is chorine
Cycling enthusiasts often prefer bicycles made with titanium frames. Titanium is resistant to corrosion and fatigue, has a significantly lower density than steel, and seems to have a natural shock-absorbing ability. Suppose a high-quality titanium frame contains 1300 g of titanium. How many moles of titanium does this frame contain? (A calculator can be used) A) 27.16 moles B) 62.23 moles C) 1.6 x 1026 moles D) 27 moles
Answer:
A) 27.16 moles
Explanation:
According to the question, Titanium element (Ti) is the major constituent of a frame used to make a bicycle.
The titanium-frame contains 1300grams of titanium. Thus, the amount of moles in the frame can be calculated using the formula:
Number of moles = mass ÷ molar mass
Molecular weight or molar mass of Titanium= 47.87g/mol
Hence;
Number of moles= 1300/47.87
No. of moles= 27.15688
No. of moles= 27.16 moles
Note that, the less precise measurement will be used. 27.16 (4s.f) is less precise than 27 (2s.f)
list three examples each of objects that are comonly measured by mass, by volume, and by length
Answer:
Explanation:
Milk, flour, gold
according to the graph, how many mice will be born in week 5 if the trend continues?
During a chemical reaction...
A) atoms are destroyed, but new atoms are created to keep the mass the same.
B) atoms are rearranged, and new matter is formed.
C) atoms are destroyed, and this explains how the universe is always changing.
D) atoms are rearranged, but no new matter is formed.
Answer:
the answer is going to be D
Explanation:
the make new product but do not change
Submit your data table and answer these questions in the essay box below.
1. Which ruler has the greatest precision?
2. Compare your estimates with the actual measurements. How close were your estimates?
I'm not sure, i had this same question, and it doesn't make any logical sense because
A centimeter is a centimeter but in the video apparently not... for example in the video it showed the notebook as 40cm for one and the next one shows it as 14.4 cm it stayed as cm both times the size of the ruler should not change that one ruler was by 10cm the other was by 1 cm and it showed 2 completely different numbers
so therefore it doesn't make any logical sense
here was my measurements from the little video it had
try getting ahold of the teacher or whoever gave you the question its all you really can do...
hope this helped even tho it probably didn't
Based on the results of this lab, write a short paragraph that summarizes how to distinguish physical changes from chemical changes. Physical changes occur when the properties of a substance are retained and/or the materials can be recovered after the change. Chemical changes involve the formation of a new substance.
Answer:
Physical changes occur when the properties of a substance are retained and/or the materials can be recovered after the change. Chemical changes involve the formation of a new substance. Formation of a gas, solid, light, or heat are possible evidence of chemical change.
brainliest???
Answer:
Physical changes occur when the properties of a substance are retained and/or the materials can be recovered after the change.
Explanation:
The clown, which your grandparents hire for your 18th birthday, is filling balloons with helium (He) to a volume of 2500 mL. If the density of helium (He) at room temperature is 0.0001785 g/mL, calculate the mass of the helium the clown is using.
Answer:
.45g
Explanation:
Do not forget to add the unit at the end, grams(g).
What forces makes a fan stop spinning?
Answer:
And since there is a frictional force acting upon the rotating blades of the fan due to the air, the speed of the fan blades ceases and ultimately comes to halt. Thus here, air friction is the external force which makes the fan blades to stop after sometime, otherwise it would have never stopped rotating :P.
Explanation:
Answer: air friction
Explanation:
What do you think the difference is between a personal characteristic and a physical description, when talking about people?
Answer:
I would say a physical characteristic is about what a person looks like, whereas a personal characteristic is how they act, and what theor personality is like.
Explanation:
Physical means something you can see or touch, like hair or skin. Personal is more often used for how someone's personality is, and you can't touch someone's personality.
1) 5,730 s to ks
2) 22,000 mg to cg
3) 0.077 ks to ms
PLEASE BE CAREFUL AND PAY ATTENTION TO COMMAS AND DECIMALS!
Answer:
1) 5.73 ks
2) 2200 cg
3) 77000 ms
Explanation:
Kendall has an empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble
Answer:
She can measure the volume and mass of the marble, the volume and mass of the water, and the mass of the graduated cylinder.
Explanation:
Graduated cylinders are used to measure volume, hence she can be able to measure the volume of the marble from the volume of water displaced. The measuring cylinder is also used to measure the volume of the water. The balance is used to measure the mass of the water and mass of the marble.
Nitrogen has one more valence electron than carbon has. What can you infer about nitrogen's location on the periodic table. 5 points Nitrogen is in the first group. Nitrogen and carbon are in different groups. Nitrogen is directly above carbon but within the same group. Nitrogen is directly below carbon but within the same group.
Answer:
nitrogen and carbon are in different groups
Explanation:
the group number determines the number of valence electrons the element has. since nitrogen and carbon have different numbers, they cannot be in the same group.
Using the above scenario, which of these would have the largest amount of available energy?
A) grass
B) grasshopper
C) snake
D) hawk
Answer:
Grass
Explanation:
The higher up you go in a food chain, the less energy available and the more you have to use to acquire energy.
If you have two substances with the same volume, but different masses,
which one is more dense?
Answer:the one with more mass
Explanation: the more mass the more dense
What does it mean for a hypothesis to be testable? APEX
Answer:
A Scientific hypothesis must be testable, for a hypothesis to be testable means that it is possible to make observations that agree or disagree with it. This statement may or may not be true, but it is not a scientific hypothesis. That's because it can't be tested.
Explanation:
TRUE OR FALSE
Friction is a force that acts in the same direction as the that of the object in motion
Answer:
False.
Explanation:
Friction is a resisting force that acts on a body to prevent its motion. Friction force acts opposite to the direction of motion.
you know the mass of an object and the force applied to the bject to make it move . Which of Newtons laws of motion will help you calculate the acceleration of the object
Answer:
second law of acceleration
Explanation:
hope this helps :)
Answer:
third newtons law of motion
Atoms can be neutral with different numbers of protons and electrons True or False
Answer:
False
Explanation:
ok?
22) A(n)
needs to be carefully planned so that it is controlled and measurable and
its results are repeatable .
A. chart
B. journal entry
C. experiment
D. observation
E. article
Answer:
chart
Explanation:
what will be the colour of Naoh solution when added to phenolphthalein
Explanation:
determine the level of your emotional maturity.
CAN YOU KEEP YOUR CALMNESS IN STRESSFUL SITUATION?
BRAILY I NEED HELP ASAPP
When an object has a definite
shape, how is it measured? Give an
example of an object and the tool
you would use to measure it.
Explanation:
Mass is the amount of matter in an object. Mass is measured in grams (1000 grams = 1 kilogram). 2. Solid- The particles of matter in a solid are tightly packed together and have a definite shape and take up a definite amount of space (volume).
for example and apple you can use a scale to find the mass. or a graduated cylinder to find the volume
What is the chemical formula for barium and chlorine?
Answer:
Barium chloride is an inorganic compound with the formula BaCl2.
chlorine Cl-
Answer:
The chemical formula is BaCl2
1. What is the mitochondra in a cell? What is its primary funtion?
Answer:
Its the powerhouse of the cell.
Explanation:
It breaks down food into energy.
I hope this helps. :3
The Rydberg constant is 3.3 x 10 15 Hz. this value is also
Answer:
Rydberg constant 3.3 x 10¹⁵ Hertz is equal to 1.090 x 10⁷ m⁻¹
Explanation:
Given;
Rydberg constant as 3.3 x 10¹⁵ Hz
1 Rydberg constant = 3.3 x 10¹⁵ Hz
1 Rydberg constant = 1.090 x 10⁷ m⁻¹
Therefore, Rydberg constant 3.3 x 10¹⁵ Hertz is equal to 1.090 x 10⁷ m⁻¹
Here, we are required to identify another value for the Rydberg constant part from 3.3 × 10¹⁵Hz.
This value is also R = 1.1 × 10⁷.
The Rydberg constant, R is a constant relating to the electromagnetic spectra of an atom.
The value of Rydberg constant is 3.3 x 10¹⁵Hz above and is in terms of the Frequency of the spectra lines.
However, another way to express Rydberg constant is by dividing its value above by the speed of light, c to yield;
R = R'/c where c = speed of light = 3 × 10⁸m/s.This Rydberg value is also, R = (3.3 × 10¹⁵)/3×10⁸.
Therefore, this value is also R = 1.1 × 10⁷.
Read more:
https://brainly.com/question/14915323
Observation: I am in the lab timing how long it takes to boil 100 mL of water in a beaker over a Bunsen burner. I observe it takes 5:15 mins to boil the water. I want to get the most accurate answer possible so I repeat the test again making sure everything is the same. This time it takes 7:05 mins to boil the water. I think this is unusual so I repeat the experiment a third time and it takes 5:20 mins. What could we infer about the differences in the times observed?
Answer:
The likely causes inferred about the differences in times observed are;
1) Slight increase of the vapor pressure of the air immediately above the water surface due to the presence of a lid
2) Variation of heat input due to wind draft that alters the focus of the flame
3) The introduction of impurities into the water from the water source or through the sourcing mediums or containers or during handling of the water
Explanation:
The factors that affect the boiling point of water includes;
1) The amount of heat supplied, to the water
2) Vapor pressure above the water surface
3) Presence of impurities in the water
Therefore, the most likely causes for the difference in the times observed for the water to boil in the order of increasing probability of cause and effect are therefore;
1) Slight increase of the vapor pressure of the air immediately above the water surface due to the presence of a lid
2) Variation of heat input due to wind draft that alters the focus of the flame
3) The introduction of impurities into the water from the water source or through the sourcing mediums or containers or during handling of the water.
We can infer that the observed time differences may be the result of impurities present in the water.
We can achieve this result because:
The water boils when it reaches a temperature of 100ºC.In this case, if the student shown in the question above used the same amount of water, in the same beaker, and the same heating intensity, all experiments should have taken the same amount of time to boil the water.However, the boiling temperature of water (100°C) can be changed if the water contains any kind of impurity. In this case, we can infer that the second experiment of the student contained impure water, which made the boiling temperature higher.
More information:
https://brainly.com/question/16122572?referrer=searchResults
find the mass of 5ML volume of water if the density of the water is 1g/mL
Answer:
If 5 mL of water is displaced when 10 g of solid is placed in the water, then it is a relatively good assumption that the density of the solid is 2 g/mL
.
Explanation:
How could you improve an item that you use
regularly? *
Explanation:
by adding some technique ex. to make the item easier for use, more convenient, more benefits than regular items.
which type of electronic radiation has a lower frequency than infrared radiation? A gamma rays B microwave C visible light D x-ray
Answer:
A, gamma rays
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
An object has a mass of 20 g and a volume of 100 mL. What is the density of the object?
Answer:
The answer is
0.2 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]From the question
mass of object = 20 g
volume = 100 mL
Substitute the values into the above formula and solve
That's
[tex]Density = \frac{20}{100} \\ = \frac{2}{10} \\ = \frac{1}{5} [/tex]
We have the final answer as
0.2 g/mLHope this helps you
