Answer:
K = 30N/m
Explanation:
We use this equation:
F= k∆x
Where ∆x refers to the amount or stretch or compression and k is the spring constant.
F = force
k = spring constant
∆x = change in length of spring
We don't know the value of k, so we make k the subject:
k = F/∆x
k = 6N x 0.2m
k = 30N/m
how many
moles are in 9.01 x 1023 molecules of water. answer should be rounded to three significant figures.
A. 1.50
B. 15.0
C. 0.150
D. None of the above
Answer:
A. 1.50
Explanation:
9.01 x 1023 molecules* 1 mol/ 6.022×1023 molecules= 1.49618067087 moles
Rounded would be 1.50
Which of the following statements does not describe a physical property of chlorine?
O The color of chlorine gas is green.
O The density of chlorine gas at standard temperature and pressure is 3.17 g/L. OChlorine combines with sodium to form table salt.
O The freezing point of chlorine is -101°C.
Answer:
the chlorine gas is green
Explanation:
the density of
Therefore, the first option A is correct.
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Which place describes a community?
A. a desert of sand, rock, hawks, and snakes
B. the desert
C. a forest birds, insects, and squirrels
D. a hole in which a snake lives
The chemical compound, "AB" has a molar mass of 74.548 g/mol.
What is the percent by mass of B in AB? (Mass of A = 39.098 g/mol,
B = 35.45 g/mol)
Answer:
47.55%
Explanation:
how does wind change the shape of earth surface?
Answer:
wind can cause rocks to erode and can expose more of the earth crust then before.
Which has the largest ionization energy, platinum or nickel?
WILL AWARD POINTS AND BRAINLIEST
Which of the following is an example of a compound?
Select all that apply
H20
F2
C2H6
Ag
Is the answer H2O and C2H6?
mole-mass problem:
Water decomposes to produce hydrogen gas and oxygen gas. How many moles of oxygen would be produced from 10.0 moles
water? 2 H2O → 2 H2 + O2
Answer:
5.00 mol O₂
Explanation:
2H₂O → 2H₂ + O₂In order to solve this problem we will need to convert moles of water to moles of oxygen. We will do that using the stoichiometric coefficients, as follows:
10.0 mol H₂O * [tex]\frac{1molO_2}{2molH_2O}[/tex] = 5.00 mol O₂Thus 5.00 moles of oxygen would be produced from 10.0 moles of water.
MULTIPLE CHOICE QUESTION
What are the stomata (singular: stoma)?
The part of the plant that takes in sunlight.
The powerhouse of the cell.
Small holes in the leaf that let air in and out.
HELP ME
Answer:
3:small holes that let air in and out
Which structure is the sun located
how many molecules are in 4 moles of He?
Answer:
⇒ n = 2.4088 × 10²⁴
- So, the no of atoms in 4 moles of helium is 2.4088 × 10²⁴.
Explanation:
What do scientists think is responsible for this dramatic change in height? Cite evidence from the text to support your answer.
Answer:
Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 11,700 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
Explanation:
i might be right
How can one determine that a redox reaction will be nonspontaneous?
A. The oxidation potential has a negative value.
B. The reduction potential plus oxidation potential is positive.
C. The reduction potential plus oxidation potential is negative.
D. The reduction potential has a positive value.
Answer:
C: The reduction potential plus oxidation potential is negative
Explanation:
Redox reaction is a combination of reduction and oxidation reactions. A redox reaction can be nonspontaneous if the sum of reduction and oxidation potential is negative. Thus, option C is correct.
What is a redox reaction?Redox reaction involves the transfer of the electron from an electron donor to an acceptor. This lead to the change in the oxidation number, and the charge on the atom or the molecules.
A redox reaction has been said to be nonspontaneous if the reduction and the oxidation half of the reactions add to a negative value. As there is an external voltage supplied to the reactants that have to result in a negative potential.
Therefore, option C. the redox reaction is nonspontaneous if the addition of the oxidation and reduction adds to a negative value is correct.
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You are a nurse giving a patient 0.75 cc per minute of a drug cocktail intravenously . A cc is 1ml of a solution . If the patient needs thr iv for 2 hours how many liters of this solution will you need to prepare
Answer:
90 mL
0.09 Liters
Explanation:
Givens
1 cc of solution = 1 mL
0.75 cc / min needed to go in intravenously.
2 hours needed.
? Liters
Solution
1 hour = 60 minutes
1 hours = 2 * 60 = 120 minutes
rate = 0.75 cc/minute
Liters = rate * time
Liters = 0.75 cc * 120 minutes
Liters = 90 cc
That's not the answer.
1 Liter has 1000 mL or ccs
x Liter has 90 mL
Equation
1/x = 1000 / 90
Solution
Cross multiply
1000x = 90*1 Divide by 1000
x = 90/1000
x = 0.09 Liters.
based on the activity series, what are the predicted products of this reaction?
Pt (s) + H2O (l) ----->
Answer:
dk
Explanation:
How many formula units are present in 25.0 mol of sodium chloride
25 x 6.022 x [tex]10^{23}[/tex]formula units are present in 25.0 mol of sodium chloride.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex]
of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
One mole of NaCl contains 6.022 x [tex]10^{23}[/tex] NaCl formula units.
25.0 mol of sodium chloride contains 25 x 6.022 x [tex]10^{23}[/tex].
Hence, 25 x 6.022 x [tex]10^{23}[/tex]formula units are present in 25.0 mol of sodium chloride.
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The number of formula units are present in 25.0 mol of sodium chloride is 25 x 6.022 x 10 ²³ formula units of sodium chloride.
What is formula Units ?A formula unit in chemistry is the empirical formula of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations.
It is the lowest whole number ratio of ions represented in an ionic compound.
Hence, The number of formula units are present in 25.0 mol of sodium chloride is 25 x 6.022 x 10 ²³ formula units of sodium chloride.
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1pt Which of the following is NOT true about the role tectonic forces play in the rock cycle?
O A. When plates pull apart, rocks melt, and magma forms igneous rocks.
O B. When plates crash together, rocks are buried and form metamorphic rocks.
O c. When plates slide over and under each other, the heat and pressure form igneous rocks.
OD. When rocks push upward and form mountains, the erosion of the mountains can produce sediment.
Tectonic forces do not cause plates to slide over and under each other, to produce heat and pressure which forms igneous rocks
What is the rock cycle?The rock cycle is a cycle which describes how the three basic rock types are related and how earth processes convert one rock type into another over geologic time.
Plate tectonic forces together with weathering and erosional processes, are responsible for the rock cycle.
Tectonic forces play the following roles in rock cycle:
When plates pull apart, rocks melt, and magma forms igneous rocks.When plates crash together, rocks are buried and form metamorphic rocksWhen rocks push upward and form mountains, the erosion of the mountains can produce sedimentTherefore, the statement that when plates slide over and under each other, the heat and pressure form igneous rocks is not True.
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IM GIVING BRAINLIST HELP Deep, cold water is the __________. Warm, shallow water is the ___________.
Question 3 options:
least dense; densest
densest; least dense
densest; densest
least dense; least dense
In an ecosystem, deep, cold water is the densest while warm, shallow water is the least dense.
What is an ecosystem?An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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_____of gas molecules with an object is the cause of
pressure by a gas.
Answer:
Gas Pressure
Explanation:
Gas pressure is caused by the force exerted by gas molecules colliding with the surfaces of objects (Figure 5.2. 1). Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure.
Answer:
Collisions
Explanation:
It says that it was the answer.
7. Look at the graph in Figure 14.10 on page 420. What two observations did
Jacques Charles make about the behavior of gases from similar data?
Why can't I find a cute Asian dude that dresses well?
Answer:
ummmmmmm just not lookin good enough i guess lol
Explanation:
ty 4 the points
How many milliliters does 80 g of a 2 g/mL density liquid take up?
Answer:
40mL
Explanation:
Given parameters:
Mass of liquid = 80g
Density = 2g/mL
Unknown:
Volume of the liquid = ?
Solution:
Density of a substance is its mass per unit volume.
It is expressed as:
Density = [tex]\frac{mass}{volume}[/tex]
Volume = [tex]\frac{mass}{density }[/tex]
So;
Volume = [tex]\frac{80}{2}[/tex] = 40mL
A 100 kg rock is broken into five smaller rocks for a garden. What is the total mass of all five smaller rocks?
Answer:
100 kg
Explanation:
you cannot destory mass so, it's going to be the same just broken up pieces
pls don't answer if you done know. Which of the following best describes what would happen if mitosis did not take place?
A.Cells would get smaller and smaller over time.
B.Body tissues would not be able to repair themselves
C.The production of gametes (reproductive cells) would not occur
D.Organisms would all be multicellular.
pls help i really need this answer
Answer: B
Explanation:
Predict the empirical formulas of the ionic compounds formed from the following pairs of elements.
Mg and Cl
Cs and Br
Ga and I
Na and O
Sr and F
Ca and P
Explanation:
MgCl2
CsBr2
Na2O
SrF2
CaP2
which one is you fav one
Answer:
the 3rd one
Explanation:
Helppp meeeee plssss
Answer:
it is very difficult to me I follow you plz follow me
NEED HELP ASAP WILL GIVE BRAINLYEST Organisms that are made up of prokaryotic cells are NOT ____________. Multicellular All of these are true about prokaryotic cells Simpler than organisms made up of Eukaryotic celled organisms Bacteria
Explanation:
the answer is that prokaryotic cells are not multicellular
Can y’all help for these two questions?
"What are behavioral adaptations?
Why would an animal adapt it's behaviors?"
balance the word equation then determine the sum of all coefficients.
Gallium metal reacts with chlorine gas to produce gallium chloride. The sum of all coefficients in the balanced equation is ____?
The sum of all coefficients = 7
Further explanationGiven
The word equation
Required
The sum of all coefficients
Solution
The chemical equation can be expressed in terms of:
word equation skeleton equation balanced equationConvert the word equation into a chemical equation(skeleton) :
Ga + Cl₂ → GaCl₃
Balanced equation
2Ga + 3Cl₂ → 2GaCl₃
The sum of all coefficients :
= 2+3+2
= 7