Answer:
Metals tend to lose electrons to form positive ions.
What is 1 item that is a compound?
Give an example of how the 1 item is a compound :D
How much of the stock solution of 2.0 M of Blue 1 dye would be needed to
create 10 mL of a 0.5 M solution of Blue 1 dye?
Answer:
2.5 mL
Explanation:
The following data were obtained from the question:
Molarity of stock solution (M₁) = 2 M
Molarity of diluted solution (M₂) = 0.5 M
Volume of diluted solution (V₂) = 10 mL
Volume of stock solution needed (V₁) =?
Thus, we can obtain the volume of the stock solution needed by using the dilution formula as illustrated below:
M₁V₁ = M₂V₂
2 × V₁ = 0.5 × 10
2 × V₁ = 5
Divide both side by 2
V₁ = 5/2
V₁ = 2.5 mL
Thus, 2.5 mL of the stock solution is needed.
can someone help me please?
The girl in the picture is at the highest point in swinging and starts to come down. Which statement could describe the changes in energy for her?
(1 point)
A) Potential energy is increasing, and kinetic energy is decreasing.
B) Kinetic energy is increasing, and potential energy is decreasing.
C) Kinetic and potential energy are increasing.
D) Kinetic and potential energy are decreasing.
2. Earth is closest to the sun around January 3 each year, and it is farthest from the sun near July 4. Around which date would Earth be moving the slowest as it orbits the sun? (1 point)
A) October 3
B) April 4
C) July 4
D) January 3
3.At which of the three points, if any, is the bicyclist’s potential energy increasing?
(1 point)
A)The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
B)The potential energy is increasing at point A because the bicyclist is moving fastest at that point.
C)The potential energy is always decreasing because the bicyclist continues to move forward.
D)The potential energy is increasing at point B because the bicyclist is highest there
4.How would potential energy and kinetic energy change going down stairs one at a time or two at a time?(1 point)
A) Going down stairs two at a time means you will get down in fewer steps, which saves you some kinetic and potential energy.
B) If you go down stairs two at a time, then you are going a greater distance, which will decrease your potential energy. Your kinetic energy will be less when you land on the stair.
C) Going down stairs two at a time will give you twice as much kinetic energy by the time you reach the bottom stair.
D)If you go down stairs two at a time, then your potential energy relative to the stair is greater. Your kinetic energy will be greater when you land.
Answer:
1) Kinetic energy is increasing, and potential energy is decreasing.
2) July 4th
3) The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
4) If you go down stairs two at a time, then your potential energy relative tot he stair is greater. Your kinetic energy will be greater when you land.
Explanation:
Hope this helps!
Answer:
Question 1: B- Kinetic energy is increasing, and potential energy is decreasing.
Question 2: C- July 4
Question 3: A- The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
Question 4: D- If you go down stairs two at a time, then your potential energy relative tot he stair is greater. Your kinetic energy will be greater when you land.
Hope this helps!
Please mark as brainliest if helps!!
6. Since the valves act as the doors of the heart, what might happen if these
doors do not close?
Answer:
If the valves of the heart do not close, the blood will flow backwards. Blood will escape back into the chambers rather than flowing forward through the heart or into an artery.
Explanation:
Manny designs an experiment to learn about erosion. First, he sets up three long trays with equal-sized piles of sand at one end of each tray. Then he sets up Tray A so that it lays flat on a table. He elevates the end of Tray B that holds the sand by 5 cm (centimeters). Next, he elevates the end of Tray C that holds the sand by 10 cm. Manny slowly pours 200 mL (milliliters) of water onto the sand in each tray. Finally, he observes and measures how far sand is carried by the water poured into each tray.
Answer:
height of the tray
Explanation:
all the other answers depend on eachother to get results, the hieght does not
Answer:
he is right i think
Explanation:
The average speed of a car during 5 hours is 50 miles per hour. What is the total distance traveled by the car?
O 0.1 miles
O 10 miles
O 250 miles
O 500 miles
Answer: 250 miles
The rate for 1 hour is 50 miles per hour. We must multiply 50 by 5 to find the distance drove in 5 hours.
50 x 5 = 250.
The answer to the question is 250.
Do you think “doing the wave” is a wave? Why or why not?
Answer:
i mean kinda they should throw people in the air tho lol
Explanation:
What is the electronic structure for silicone?
WILL MARK BRAINLYEST!!
Answer:
The answer isn’t
[Ne] 3s² 3p²
What isotope undergoes beta decay to produce xenon-131
Determine the mass of water in kg, if 4300 cal of energy is placed in water, resulting in a temperature change to 101.0 oC from 92.5 oC.
Answer:
0.5059kg
Explanation:
The heat absorbed for the water is determined using the equation:7
Q = C×m×ΔT
Where Q is heat absorbed (4300cal)
C is specific heat (1cal/g°C)
m is the mass in grams
ΔT is change in °C (101.0°C - 92.5°C = 8.5°C)
Replacing:
4300cal = 1cal/g°C×m×8.5°C
505.9g = m
In kg, the mass of water is:
0.5059kg
The first organisms to appear on Earth did not need?
a.
oxygen.
c.
cells.
b.
nitrogen.
d.
chemicals.
PLZ HURRY
I already know that the answer is NOT D.
Answer:
d
Explandation:
Answer:
A.
Explanation:
Because the first organism was bacteria and bacteria does not need oxygen to grow
Which formula represents hydrofluoric acid?
HFO
H2F
HFO 4
HF
Answer:
it's HF
Explanation:
2. Describe how decomposers contribute to the cycling of nutrients in an ecosystem.
PLEASE I NEED THIS ASAP
Answer:
Explanation:
Decomposers get nutrients and energy by breaking down dead organisms and animal wastes. Through this process, decomposers release nutrients, such as carbon and nitrogen, back into the environment. These nutrients are recycled back into the ecosystem so that the producers can use them.
When the wedges are removed, the cars will move. Predict which direction they will move and when they will stop.
Answer:
they will move and stop
Answer:
they will both repel
Explanation:
because they both have the same charge
When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.
Answer:When a substance undergoes a chemical change some of the chemical changes can be reversed with a chemical change.
Explanation:
A chemical change changes all of the element but some chemical changes but very few can be changed back to its original substance only with a chemical change.
calculate the average atomic mass of 7.4% Li-6 92.6% Li-7
7.016003 amu.
yes this is the answer yw
Energy appears in many forms what form of energy is lightning
Answer:
thermal and light energy
The majority of the mass of the atom is located in the___
Answer:
Nucleus
Explanation:
Since electrons are 1/1840 of the weight of a proton or a neutron, all of which are in the nucleus, scientists often don't include them.
PLZ HELP ME ASAP IM TAKING AN EXAM :(
Protons have a positive charge. Neutrons have no charge. Electrons have a negative charge. Given this information, what can you conclude? *
a.)The nucleus contains protons & electrons
b.)The nucleus contains an overall positive charge
c.)The nucleus contains an overall negative charge
d.)The nucleus contains neutrons and electrons
Answer:
B - The Nucleus has an overall positive charge
Explanation:
Nuclei consist of Neutrons and Protons; Electrons are not included in the Nucleus, they surround it.
What is the time it takes the Earth to make one revolution around the sun called?
A-equinox
B-lunar year
C-solar year
D-solstice
Need help on this
Question
Answer:
The answer is D
He is chemical symbol for which element
A)helium
B)hafnium
C)hassium
D)hydrogen
Answer:
it is helium so A.........
He is the chemical symbol for Helium.
Explain the effect of balanced forces on the state of motion of an object?
Answer:
The effect of balanced forces on an object does not cause an object to change in motion.
Explanation:
hope this helps:)
Food web diagrams the interactions between organisms based on which organisms others are eating. A scientist is using a food web to predict the predator-prey relationship of a population. What can a food web best be classified as?
A. a mean
B. a graph
C. a model
D. a range
Answer:
model
Explanation:
edge 2020
Answer:
Model
Explanation:
edge 2021
Will mark first correct answer brainliest
What is a limitation of using a chemical formula, such as CH1206, to represent a compound?
ОООО
The chemical formula does not show the types of elements that make up the compound.
The chemical formula does not show how the atoms are connected to one another.
The chemical formula does not show the number of atoms of each element in a molecule.
The chemical formula does not show the chemical symbols of the elements in the compound.
Answer:
it does not show the actual number of atoms in that molecule
Which of these elements is the most reactive?
potassium
calcium
titanium
scandium
Answer:
Scandium
Explanation:
Out of the given ones the element that is most reactive is potassium. The correct option is A.
What is reactivity series?A reactivity series is an evidence based, calculated, and architecturally analytical advancement of a series of metals arranged from highest to lowest by their "reactivity."
The reactivity series is a group of metals arranged in decreasing order of reactivity.
It is used to calculate the products of single displacement responses in which one metal A replaces a further metal B in a solution if A is higher in the series.
The metal reactivity sequence is an array of metals arranged in descending order of their chemical reactivity. It aids in predicting whether one metal can displace another in a displacement reaction.
Here in the given options, potassium is the most reactive as it is present in the topmost position of the reactivity series.
Thus, the correct option is A.
For more details regarding reactivity series, visit:
https://brainly.com/question/10443908
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Is it possible for the sun to burn out tomorrow? Why or why not?
Answer:
It is and isn't possible at the same time.
Explanation:
Stars form when enough hydrogen collects in one place that the sheer gravitational attraction of the mass to itself causes thermonuclear fusion to commence. Unlike a nuclear bomb, the reaction doesn’t last for milliseconds, but for billions of years, as convection currents carry fresh supplies of unfused hydrogen into the reaction zone, and as heavier, already fused material undergoes fusion again, starting a stepladder of elemental construction, building the table of elements from hydrogen up toward iron as far as conditions will allow. So basically, the sun doesn’t burn all at once for the same reason a candle doesn’t: It relies on convective processes to freshen its fuel supply
In general what types of common things are ionic compounds?
Answer:
LiF
LiCl
LiBr
Lil
NaF
NaCl
NaBr
Nal
Explanation:
ionic compounds are formed between metals and non-metals
1. A student wants to test if giving dogs a toy to play with makes their tail wag more. He gives dog toys to one group, while another group of dogs does not get any toys. He counts the number of times each dog wags their tail.
Experimental Group:
Control Group:
Answer
Experimental - The Dogs With Toys
Control - The Dogs With No Toys
Explanation - Im smart