In case of a chemical spill to your eyes, how many continuous minutes should you use the eye wash station for?.
Answer:
A minimum of 15 to 60 minutesof continuous washing. But it really depends on what you spilled on your eyes, but you should always wash thoroughly.
Answer:
20 min
Explanation:
Taylor grows corn on his farm. How does farming affect the amount of fresh water available?
Answer:
On average, agriculture accounts for 70 percent of global freshwater withdrawals. In the last 30 years, food production has increased by more than 100 percent. FAO estimates that about 60 percent more food will be needed by 2050 to meet the food requirements of a growing global population.
Explanation:
Because i learnt this before and i aced a test about it dont worry
What is the mass of 3 moles of Barium acetate, Ba(C2H3O2)2
Molar masses of elements are –
Ba = 137C=12 H=1O=16Mass of Barium acetate –
= 137 +( 12×2 +1×3+16×2)×2
= 137 + 59×2
=255
Mass of 1 mole of Barium acetate is 255.Therefore, mass of 3 moles of Barium acetate will be( 3×255) = 765.Which is the load
D.
A.
B.
C.
E.
Answer:
A.
Explanation:
In the case of a seesaw, the object at the top is the effort and the object at the bottom is the load.
Read the following paragraph from the section "Plasma.""
Answer:
I read, but what do I do now (what was the question)?
Answer: the question isn't listed
Explanation:
The chemical symbol O=O means ________.
a. the atoms are double bonded
b. zero equals zeroc
c. both atoms are bonded and have zero electrons in the outer orbit
d. this is an ionic bond with two shared electrons
Considering the definition of covalent bond, the correct answer is option a. the chemical symbol O=O means the atoms are double bonded.
Definition of covalent bondThe chemical bond in which atoms share electrons to create molecules is known as a covalent bond and is established between non-metallic elements. These elements tend to gain electrons to acquire the stability of the electronic structure of noble gases and have a lot of valence electrons at their outermost level. The shared electron pair is common to the two atoms and holds them together.
Depending on the number of pairs of electrons shared between the atoms that form the bond, covalent bonds will be single, double, or triple. Two atoms form a single covalent bond when they share one pair of electrons, a double bond when they share two electron pairs, and a triple bond when they share three electron pairs.
Correct answerTaking into account the definition of covalent bond, the chemical symbol O=O means the atoms are double bonded (option a.)
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Why is it important for science to keep testing a hypothesis even after they’ve found it to be true?
Answer:
Explanation:
Repeated tests help determine whether the hypothesis is always true in different circumstances. Repeatedly testing a hypothesis qualifies it to be accepted as a theory.
Avogadro's number represents the number of units in a mole. What is this value?
Answer: 6.02 x 10^23
Explanation: Please look at the photo below for confirmation!
true or false? digital electronic circuits distinguish between two values of interest (binary 0 and 1) by the voltage level of the signa
Answer:
true
Explanation:
Answer:
True
Because 1 represents a higher voltage while 0 represents a low voltage.
Work done when lifting up the water tank,give the water in the tank________ energy.
Answer:
Kinetic mechanical energy
Explanation:
The water was used to power a generator, creating electric energy.
what is hard water and what is soft water?
Answer:
Hard water is water that has high mineral content.soft water is water that is free from dissolved salts of such metals as calcium, iron, or magnesium
1. Explain what happens to the train cars when the engine car begins moving to the left. In your response, describe the role played by magnetic force.
The train cars moves in the same direction when the engine car begins
moving to the left.
What is Law of magnetism?The law of magnetism states that like poles repel and unlike poles attract.
In substances which have magnetic field, they are known to attract each
other.
The engine and train car are highly magnetized which results in them
moving in the same direction when they are in close contact with one
another.
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How many moles of water is produced if used 0.5 mol of NaOH and 0.5 mol of HCl
Answer:
attached
Explanation:
answer attached
What gives an atom mass?
a. protons & electrons in the cloud
b. protons & neutrons in the nucleus
c. protons & electrons in the nucleus
d. electrons in the cloud
Which of the following is a valid mole ratio from the balanced equation below? *
Answer:
Option 3
Explanation:
Looking on both sides of the equation you can see that there are 2 moles of lithium chloride (LiCl) and 1 mole of chlorine (Cl2).
In this specific example, you are looking at the numbers in front of the compounds and seeing if they are appropriate, to see if they match what you see in the equation.
So for option 4, it says that there are 2 moles of bromine (Br2) for every 1 mole of chlorine (Cl2), but if you look at the equation there is only 1 mole of Br2 and 1 mole of Cl2, not 2 moles of Br2. (Don't get confused by the subscripts! Only look at the big coefficients in the front for this!)
The same logic applies to options 2 and 1. So only option 3 is feasible.
Which of the following is an adaptation of organisms in avoiding unfavorable condition due to a change in abiotic factor?
A. Migration of birds due to change in seasons.
B. Hibernation of a snake from September to December.
C. Plants die due to lack of water and high temperature.
D. Body temperature regulation of polar bears during winter
Volcanic eruption is considered as one of the changes in abiotic factors in the ecosystem. Which of the following is/are the effect/s of volcanic eruptions in the ecosystem?
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III
Help plsssssss
The effects of volcanic eruption include acid rain and destruction of lives and property.
What are abiotic factors?The term abiotic factors refers to those factors that are non living such as rainfall, topography, etc. The adaptation of organisms in avoiding unfavorable condition due to a change in abiotic factor is hibernation of a snake from September to December.
A volcanic eruption is a sudden outburst of molten magma from the earth's crust. The effects of volcanic eruption include acid rain and destruction of lives and property.
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what is the weight of oxygen in 50gwater
To compute the required mass of the element to form the given molecules, we'll use the general formula shown below:
{eq}\displaystyle m_1=\frac{M_1}{M_2}\times m_2 {/eq}, where,
{eq}M_1 {/eq} is the molecular weight of the element.
{eq}M_2 {/eq} is the molecular weight of the given molecule.
{eq}m_2 {/eq} is the mass of the given molecule.
Answer and Explanation:
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The given value is:
The value of the mass of the water molecule is {eq}m_2=\rm 50\ grams {/eq}.
The chemical reaction for the formation of water...
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Formula for Mass: Definition & Examples
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Chapter 28 / Lesson 42
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What is mass? Learn the mass definition and how to find the mass of an object using the mass formula. See common mass characteristics and properties.
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What statement describes elements.A Pure substance that
Answer:
Elements are pure substances with only one type of atom.
Explanation:
Hope This Helps
Have A Great Day
What do theories help scientists do? (1 point)
A. prove hypotheses to be correct
B. explain large collections of data
C. determine if a claim is false
D. propose new ideas on the subject
Answer:
A. prove hypotheses to be correct is the correct answer I think
Explanation:
A scientific theory has been defined as a thorough explanation of the facts and includes the hypothesis and laws. The scientific theory allows scientists to prove the hypothesis to be correct. Thus, option A is correct.
What are scientific theories?Scientific theories have been the summary of the universal and natural sciences that are well sustained and never proved. They are based on observable explanations and information that were tested through experimentation.
It uses experimental and research setup to prove the hypothesis to be credible by the conclusions and findings that are also supported by the scientific laws. They are reliable conclusions and are just not guesses.
Therefore, option A. scientific theories are used to prove the reliability of the hypothesis.
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As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy?
A. Both the potential energy and kinetic energy decrease.
B. The potential energy decreases while the kinetic energy increases.
C. The kinetic energy decreases while the potential energy increases.
D. Both the potential energy and kinetic energy increase.
C.
Explanation:
As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy? The potential energy decreases while the kinetic energy increases.
Why can a soil scientist be part of the agriculture?help ASAP I’ll give brainliest
Solution a has a ph of 6. Solution b has a ph of 8. What is true about these solutions?.
Answer:Solution A has 10 times more hydrogen ions than solution B.
How many moles of carbon dioxide are there in 52. 06 g of carbon dioxide?.
Which term names the container that holds the gear box and generator in a wind power system?.
Answer:
Nacelle. The nacelle sits atop the tower and contains the gearbox, low- and high-speed shafts, generator, and brake.
Explanation:
what is the molar mass of CaF2
Explanation:
78.07 g/mol is your answer
Answer:
78.07 g/mol
Explanation:
i hope this helps
Which pair of compounds has the same empirical formula? c3h8 and c3h c2h2 and c2h c4h10 and c6h c4h10 and c2h5.
Answer:
The correct answer is the final pair: C4H10 and C2H5
Explanation:
Took the test and it was right. :)
[tex]C_4H_{10}[/tex] and [tex]C_2H_5[/tex] pair of compounds have the same empirical formula.
What is an empirical formula?A chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule [tex]CH_2O[/tex] is the empirical formula for glucose.
An empirical formula is the chemical formula of a compound that gives the proportions (ratios) of the elements present in the compound but not the actual numbers or arrangement of atoms.
This would be the lowest whole number ratio of the elements in the compound.
Hence, option D is correct.
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Question 1 of 1 The state of chemical equilibrium occurs when the concentrations of _____. all reactants and all products remain constant products is less than the concentration of reactants
neutrons have a _______ charge
Answer:
neutrons have a neutral charge
Explanation:
What make them neutral. It means why do we say that they are neutral. The American polymath benjamin Franklin named the charges as positive and the negative. He did this because when one kind of charges are combined they increase their effect but when the same kind was mixed with the other charges the charges used to disapear or loss their strength . so it was clear that there are two types of charges and have got a methametical relation between them . He called them posive and negative charges analogous to positive and negative numbers because when negative numbers are added with the negative number we get a larger negative numbers and vice versa. So it means that every object that we can observe contain charge but of both kinds in same quantity so we call them neutral . so answer to that question would be that it has charge because charge is the fundamental property of particles but it has both +ve and -ve charges equal in magnitude so not any net charge is there on neutron it is in equilibrium.
Which elements make up a water molecule?
COSMO
hydrogen and nitrogen
oxygen and nitrogen
oxygen and carbon
hydrogen and oxygen
Answer:
hydrogen and oxygen make up water molecules
Answer:
Oxygen and Nitrogen
Explanation:
because these two elements react very strongly
How many molecules of oxygen are there in 1.00 dm3 of oxygen at standard pressure and a temperature of 273 K. Give your answer to three significant digits.
we need no of moles
[tex]\\ \tt\hookrightarrow PV=nRT[/tex]
[tex]\\ \tt\hookrightarrow n=\dfrac{PV}{RT}[/tex]
[tex]\\ \tt\hookrightarrow n=\dfrac{1}{273(8.314)}[/tex]
[tex]\\ \tt\hookrightarrow n=1/2269.7=0.0004mol[/tex]
No of molecules=No of moles×Avagadro no
[tex]\\ \tt\hookrightarrow 0.0004(6.023\times 10^{23})[/tex]
[tex]\\ \tt\hookrightarrow 2.4\times 10^{20} molecules [/tex]
Hi there!
Note: 1 mole of a any gas at ST and Pressure (273 K and 1 atm) occupies a volume of 22.4 dm^3
=> x mole of oxygen occupies 1.00 dm^3
Therefore, the mole of oxygen on 1.00 dm^3 is :
[tex]mole \: of \: oxygen = \frac{1.00 {dm}^{3} \times 1 \: mole}{22.4 \: dm^{3} } = 0.044642857 \: mole[/tex]
Also note that Avogadros Constant says: 1 mole of any gas contains [tex]6.022 \times {10}^{23}[/tex]molecules.
Hence, 0.044642857 mole of oxygen will contain :
[tex]0.044642857 \times 6.022 \times {10}^{23} = 2.69 \times {10}^{22} \: molecules[/tex]
Therefore, [tex]2.69 \times {10}^{22} \: molecules \: are \: present \: in \: 1dm^{3} \: of \: oxygen \: at \: stp[/tex]
