Answer:
The resultant is the vector sum of two or more vectors. It is the result of adding two or more vectors together. ... When displacement vectors are added, the result is a resultant displacement.
How are electrons similar and different to the planet Earth?
Answer:
The planets themselves are composed of several trillions or quadrillions or more atoms. As far as hard science is concerned, it would be really hard to picture them as electrons. Conclusion: It can be said with a great accuracy that our planets are NOT huge electrons.
Rutherford's experiments showed that the mass of atoms was mostly concentrated in a very small region, with charge equal to the atomic number- the nucleus. He absolutely did not show, nor is it true, that electrons orbit the nucleus as if they were planets. That was a guess people made in trying to figure out how to picture the atom.
(Hope this helps) Sky
An exothermic reaction releases 13,450J of heat. How many calories of energy are released? A) 5 56,274 calories B)1,244 caloriesC) 134,500 caloriesD) 3,215 calories
Answer:
The correct option is;
D) 3,215 calories
Explanation:
Here we are required to convert 13,450 J to calories
1 calorie is the amount of heat required to raise the temperature of 1 gram of water by 1°C
Therefore, 1 calorie = 4.184 Joules
Hence, 1 Joule = 1/4.184 calorie for which we have;
13,450 J = 13,450 × 1/4.184 calories = 13,450/4.184 calorie
13,450 J = 3,214.63 calories
Rounding up to the nearest whole number, we have;
13,450 J ≈ 3,215 calories.
1-Which reaction shown below is carried out by nitrifying bacteria? I will mark you as brainlist
Choose:
A.{ammonium} to {nitrate}
B.{nitrate} to {nitrogen gas}
C.{nitrogen gas} to{ammonium}
Answer:
ammonium to nitrate.
Explanation:
they tie em together
Over the past century, the percent of squirrels in the vicinity of Washington, DC, that are black instead of the more common gray has been continually increasing. Which of the following statements best explains why this is happening?
A.
Black squirrels are more visible against tree trunks than gray squirrels.
B.
Black squirrels are more popular with tourists than gray squirrels.
C.
Gray squirrels are more comfortable with humans than black squirrels.
D.
Black squirrels have a survival advantage over gray squirrels.
Help on science question please! (Small drawing) will mark brainliest
If a gas occupies 22.4 L at 0.265 atm, then what will the pressure be in atmospheres if the gas occupies 35.52 L? Assume all other
variables are held constant
A)0.167 atm
B)0.437 atm
C)0.886 atm
D)149 atm
Answer:
The new pressure is 0.167 atm
The correct answer is option A
Explanation:
Step 1: Data given
Volume of the gas = 22.4 L
Pressure of the gas = 0.265 atm
The volume increases to 35.52 L
Step 2: Calculate the new pressure
P1*V1 = P2*V2
⇒with P1 = the initial pressure = 0.265 atm
⇒with V1 = the initial volume = 22.4 L
⇒with P2 = the new pressure = TO BE DETERMINED
⇒with V2 = the increased volume = 35.52 L
0.265 atm * 22.4 L = P2 * 35.52 L
P2 = (0.265 atm * 22.4 L) / 35.52 L
P2 = 0.167 atm
The new pressure is 0.167 atm
The correct answer is option A
CAN SOMEONE HELP PLS!!!
Answer:
Matals tend to LOSE electrons to become POSITIVE ions
0.450 moles of K2SO4 are dissolved in 195.0 mL of water. Calculate the molarity of the solution.
Answer:
2.31M
Explanation:
The following data were obtained from the question:
Mole of K2SO4 = 0.450 mole
Volume of water = 195.0 mL = 195/1000 = 0.195L
Molarity =...?
Molarity is defined as the mole of solute per unit litre of the solution. This can be expressed as:
Molarity = mole /Volume
With the above formula we can calculate the molarity of the K2SO4 solution as follow:
Molarity = mole /Volume
Molarity = 0.450/0.195
Molarity = 2.31M
how does the Doppler effect related to the universal expanding?
I AM GIVING BRAINLIEST PLEASEEEEEEE HELPPPPPPP I NEEDDDDD HELPP PLZ
If 0.020 mol of LiOH are dissolved to make 4.5L of solution, what is the molarity?
PLEASE WRITE WITH STEPS
Answer:
0.0044 M or mol/L
Explanation:
We have to know that molarity is moles of a certain thing/litres of solution.
So the info we are given is we have 0.020 mol of LiOH and the litres of solution is 4.5L, hence we just plug it into the
Molarity forumla= moles of a certain thing/litres of solution.
Molarity (M)= 0.020/4.5 = 0.0044 M or mol/L
Scientific Method
PART A: Put the following steps of the scientific method in the correct order,
1 Data
2 Hypothesis
3. Conclusion
4. Problem
5. Variables
6. Research
7. Procedure
Answer:
Problem, Variables, Hypothesis, Research, Procedure, Data, Conclusion.
Explanation:
First, you have to know what the problem that you're talking about is. Then, you have to know the independent, dependent, and controlled variables are in order to make a hypothesis. Then do research about the topic. After that, you make the procedure your experiment, if that's what your doing. Then after the experiment, you find the data. Using that data, you make a conclusion.
3. Trees, bananas, skateboards and pancakes are all solids. They have
atoms that are closely packed together and don't move around very
much. Solids also have definite shape, mass and volume. "Definite"
means that it doesn't easily change. When you pour cereal into a bowl,
the pieces of cereal don't change shape. But when you pour milk into a
bowl, the milk takes the shape of the bowl. That's because cereal is a
solid.
A
Which of the following is an example of a solid?
A. applesauce
Corange juice
B. watermelon
D. berry smoothie
Answer:
B. Watermelon
Explanation:
Watermelon is the only option with a definite shape that wouldn't change if you put it in a bowl
A solution with a H+ concentration of 1.00 x 10-7 M is said to be neutral. Why?
Answer:
Because when you find the pH it comes out to be 7; 7 is neutral.
Explanation:
pH=-log(H3O+)
- Hope this helped! Please let me know if you need further explanation.
A solution with a H+ concentration of 1.00 x 10-7 M is said to be neutral as on calculating pH, it comes out to be 7.
What is pH?pH, often known as acidity in chemistry, has historically stood for "potential of hydrogen" (as well as "power of hydrogen"). It refers to a scale used to describe how basic or how acidic an aqueous solution is. When compared to basic or alkaline solutions, acidic solutions—those with higher hydrogen (H+) ion concentrations—are measured with lower pH values.
Where [H+] represents the solution's equilibrium molar concentration of H+ (mol/L). Acidic solutions are those with a pH below 7, and basic solutions are those with a pH above 7, at a temperature of 25 °C (77 °F). At 25 °C, fluids with a pH value of 7 are neutral. A solution with a H+ concentration of 1.00 x 10-7 M is said to be neutral as on calculating pH, it comes out to be 7.
pH = -log[H⁺]
= -log[1.00 x 10⁻⁷]
= 7
Therefore, a solution with a H+ concentration of 1.00 x 10-7 M is said to be neutral as on calculating pH, it comes out to be 7.
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How many total atoms from Carbon are present on the reactant side?
20 points
2CH2+202
O2+HC4
5
2
1
3
Answer:
2 carbon atoms/molecules are present on the reactant side.
hope it helps!
Need help with these three pls!!!!!
Which of the following best describes the main function of the nervous system?
To deliver nutrients and other essential materials to cells and remove waste products
To break down the nutrients found in food so that they can be used by all cells in the body
To produce the chemical signals that allow parts of the body to communicate over long distances
To coordinate all other body systems so that they can function together to maintain homeostasis
There are several ways to model a compound. One type of model is shown.
What is the chemical formula for the molecule modeled?
a.CHO
b.C4H11O2
c.C6H12O2
d.C6H9O
Answer:
C. C₆H₁₂O₂
Explanation:
Answer: C
Explanation:
C₆H₁₂O₂
IS THE ANSWER I GOT 100% on the Test!!
The oxidation number of bromine in bromine gas is _____. A. 0 B. +1 C. –1 D. –2
Answer:
the answer is 0
The answer to the question is
A. 0
What is the volume of solution (in mL) produced when 91.80g of Mg(OH)2 are used
to produce a 0.7M solution? Record your answer to 1 decimal places.
Answer: The volume of solution is 2248 ml
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml
moles of [tex]Mg(OH)_2[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{91.80g}{58.32g/mol}=1.574mol[/tex]
Now put all the given values in the formula of molality, we get
[tex]0.7=\frac{1.574\times 1000}{V_s}[/tex]
[tex]V_s=\frac{1.574\times 1000}{0.7}=2248ml[/tex]
Therefore, the volume of solution is 2248 ml
what is the same between mass and weight
Answer:
Mass is how much matter an object has. Weight is how much gravity an object is being acted upon.
Explanation:
The mass of an object will stay the same no matter where you place it. But if you were to place the object, in the moon for example, then the weight of the object would be less since there is less gravity on the moon.
I need help on this question
PLEASE HELP!
how can nuclear fission be made to happen?
a. atoms are hit with neutrons
b. atoms are hit with x rays
c. atoms are hit with light
d. atoms are hit with gases
how does the sun light affect earths climate
Answer:
The Sun powers life on Earth; it helps keep the planet warm enough for us to survive. It also influences Earth’s climate: We know subtle changes in Earth’s orbit around the Sun are responsible for the comings and goings of the past ice ages. But the warming we’ve seen over the last few decades is too rapid to be linked to changes in Earth’s orbit, and too large to be caused by solar activity
Explanation:
The new-moon phase occurs when the Moon is positioned between the Earth and the Sun. However, these positions do not always cause an eclipse of the Sun because the *
a. Moon's orbit is tilted relative to the Earth's orbit
b. New-moon phase is visible only at night
c. Night side of the Moon faces toward the Earth
d. Apparent diameter of the Moon is greatest during the new-moon phase
Answer:
D
Explanation:
The new-moon phase occurs when the Moon is positioned between the Earth and the Sun. However, these positions do not always cause an eclipse blocking of the Sun because the Moon's orbit is tilted relative to the Earth's orbit new-moon phase is visible only at night side of the Moon faces toward the Earth apparent
These positions do not always cause an eclipse of the Sun as:
d. Apparent diameter of the Moon is greatest during the new-moon phase
New-moon phase:At the new Moon phase, the Moon is so close to the Sun in the sky that none of the side facing Earth is illuminated. The new-moon phase occurs when the Moon is positioned between the Earth and the Sun. However, these positions do not always cause an eclipse blocking of the Sun because the Moon's orbit is tilted relative to the Earth's orbit. New-moon phase is visible only at night side of the Moon faces toward the Earth apparent.
Thus, correct option is d.
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What kind of energy transformations occur when you hit a coconut with a hammer
sound energy, kinetic energy,
i cant think of any more but hope this helps
Answer:
Mechanical to kinetic to sound to heat
Explanation:
Remember that all types of energy transformation end in heat
What is the difference between a haploid species and a diploid species?
Answer:
Diploid refers to the number of whole chromosome sets present in every cell of an organism: diploid cells contain entire sets. Haploid organisms, only include one complete chromosome set.
Answer:
Haploid species have only one set of complete chromosomes. Diploid species have two sets of complete chromosomes. Haploid cells are created by meiosis, where the diploid cell will divide in half. Two haploids merge by fertilization. Diploid cells reproduce by mitosis making daughter cells that are exact replicas.
Explanation:
examples of haploid are cells (gamate) sperm and ovate
examples of diploid are skin cells, blood cells
in water, what happens to a base?
It forms hydrogen ions (H+)
It condenses
It evaporates
It forms hydroxide ions (OH-)
Answer:
A base forms hydroxide ions in water.
Hope this helps
Calculate the molarity of a KCl solution if 37.3 g of KCl are dissolved in water to give a
final solution volume of 500 ml.
The molarity of a KCl solution if 37.3 g of KCl are dissolved in water to give a final solution volume of 500 ml is 1 M.
What is Molarity?Molarity of a given solution is known as the total number of moles of solute per litre of the solution. A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
The unit of molarity is mol L⁻¹.
Molarity is temperature dependent because as temperature changes, volume of the solution also changes.
Given, Mass of KCl = 37.3 g
Molar mass of KCl = 74.5 g/mol
Volume of solution = 500ml = 0.5 L
No. of moles = Mass / Molar mass = 0.5
Molarity = 0.5/0.5 = 1 M
Therefore, The molarity of a KCl solution if 37.3 g of KCl are dissolved in water to give a final solution volume of 500 ml is 1 M.
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When an electric circuit operates a buzzard makes a sound what happens to the electric charges in the circuit
Answer:
Explanation:
Khfxgkfxyfkx
How many oxygen atoms and are present in this water molecule 2H2O?
(note* the number 2 after H is a subscript)
Answer: 4 hydrogen atoms and 2 oxygen atoms.
Explanation:
For example, two water molecules (2H2O) contain 2 • 2 = 4 hydrogen atoms and 2 • 1 = 2 oxygen atoms.
