Answer:
true mass is based on gravity
Answer:
true
Explanation:
mass based on gravity
Which elements have the most similar properties?
A. K and Mg
B.O and N
C. Ne and Ar
D.Na and Nb
Answer:
K and Mg
Explanation: This is because: Discussion of calcium is often paired with magnesium, and for good reason. As neighbors on the periodic table, they have similar chemical properties and behave similarly in several chemical reactions. They share some regulatory mechanisms and act in many of the same physiologic arenas.
The density of mercury is 13.6 g/cm'. How many quarts does 83.0 g of Hg occupy? (1 L=1.06 qt)
Answer:
0.0064 qt
Explanation:
Given data:
Density of mercury = 13.6 g/cm³
Mass of mercury = 83.0 g
How many quarts mercury have = ?
Solution:
First of all we will calculate the volume in cm³.
d = m/v
13.6 g/cm³ = 83.0 g / volume
Volume = 83.0 g / 13.6 g/cm³
Volume = 6.1 cm³
cm³ to L:
6.1 cm³ × 1 L / 1000 cm³
0.0061 L
In quarts:
1 L = 1.06 qt
0.0061 L × 1.06 qt / 1 L
0.0064 qt
ammonium phosphate is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid with liquid ammonia. Calculate the moles of ammonium phosphate produced by the reaction of 2.4 mol of ammonia. Be sure your answer has a unit symbol, if necessary, and round it to significant digits.
Answer:
0.57 moles (NH4)3PO4 (2 sig. figs.)
Explanation:
To quote, J.R.
"Note: liquid ammonia (NH3) is actually aqueous ammonium hydroxide (NH4OH) because NH3 + H2O -> NH4OH.
H3PO4(aq) + 3NH4OH(aq) ==> (NH4)3PO4 + 3H2O
Assuming that H3PO4 is not limiting, i.e. it is present in excess
1.7 mol NH4OH x 1 mole (NH4)3PO4/3 moles NH4OH = 0.567 moles = 0.57 moles (NH4)3PO4 (2 sig. figs.)"
The table below shows properties of two compounds at standard pressure. Which statement classifies the two compounds? 1)Both compounds are ionic, 2)Both compounds are molecular, 3) Compound 1 is ionic, and compound 2 is molecular, 4)Compound 1 is molecular, and compound is ionic
Answer:
answer of this question is option. 3. compound 1 is ionic ,and 2 is molecular
Compound 1 is ionic and compound 2 is molecular. The correct option is 3) Compound 1 is ionic, and compound 2 is molecular
From the question,
We are to classify the compounds according to the information provided in the table
First,
We will list the properties of ionic and molecular compounds
Properties of ionic compounds
The exist as solid at room temperature. They generally have high melting and boiling temperatures. They are good electrical conductors when molten or in solution.Properties of molecular compounds
They can exist as solid, liquid or gas.They generally have low melting and boiling temperatures. They are poor electrical conductors.In the given table,
Compound 1 has high melting and boiling points, and it is a good electrical conductor. Therefore, compound 1 is ionic
Compound 2 has low melting and boiling points, and it is a poor electrical conductor. Therefore, compound 2 is molecular
Hence, Compound 1 is ionic and compound 2 is molecular. The correct option is 3) Compound 1 is ionic, and compound 2 is molecular
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Watch the animation and identify the correct conditions for forming a hydrogen bond.
A. A hydrogen bond is equivalent to a covalent bond.
B. A hydrogen bond is possible with only certain hydrogen-containing compounds.
C. Hydrogen bonding occurs when a hydrogen atom is covalently bonded to an N , O, or F atom.
D. The CH4 molecule exhibits hydrogen bonding.
E. A hydrogen atom acquires a partial positive charge when it is covalently bonded to an F atom.
Answer:
options B,C and E are correct conditions for forming hydrogen bonds.
Explanation:
In order for particles to stick together or shows certain characteristics, there must be a bond of attractions that is making them to be able to stay together. Some of these attractions are strong while some are weak. The kind of attraction that is being considered in this question is the hydrogen bonding which is considered as part of the weak forces of attractions.
In order for hydrogen bonds to occur, there must be hydrogen atoms [option B is correct] and a much more electronegative elements such as oxygen, Fluorine and Nitrogen. Hence, option C is correct.
Since the Fluorine or oxygen or nitrogen have much more electronegative properties than hydrogen, it causes a partial negative charge on Fluorine or oxygen or nitrogen and a partial positive charge on the Hydrogen. Thus, option E is correct.
What is ATP? How does it provide energy
an atom has atomic number 17, in which group and in which period is this atom located?
Explanation:
period =3
Group=7
it is cl2
Answer:
Group 7 - Period 3
Explanation:
A patient provides a urine sample. The density of the patient's urine is 1.0182 g/mL.
What is the specific gravity of the urine?
Answer:
Hey
Explanation:
The normal range for urine specific gravity is 1.005 to 1.030.
Use your periodic table to determine which of the following is a non metal
A.Nitrogen
B. Lithium
C. Sodium
D. Gold
What procedure did you use to complete the exploring cells lab?
Outline the steps of the procedure in full sentences.
A1(OH)3 + HNO3–> H2O + A1(NO3)3
when the equation above is correctly balanced the coefficient of H2O is
A:1
B:2
C:3
D:8
Answer:
3
Explanation:
The reaction expression is given as:
Al(OH)₃ + HNO₃ → H₂O + Al(NO₃)₃
To solve this problem, let us assign coefficient a,b,c and d to each specie;
aAl(OH)₃ + bHNO₃ → cH₂O + dAl(NO₃)₃
Conserving Al : a = d
O: 3a + 3b = c + 9d
H: 3a + b = 2c
N: b = 3d
let a = 1 , d = 1, b = 3 , c = 3
Multiply through by 3;
a = 1, b = 3, c = 3 and d = 1
Al(OH)₃ + 3HNO₃ → 3H₂O + Al(NO₃)₃
how many molecules are in 500 moles of Cl2?
Answer:
3 x 10^26
Explanation:
You take the number of moles (500) and multiply it by Avogadro's number (6.022 x 10^23) to get the answer.
The number of molecules in one mole of Cl₂ gas is 6.022× 10²³ . Then 500 moles of Cl₂ is 3.01 × 10²⁶.
What is one mole?Any substance containing 6.022× 10²³ number of atms is called one mole of the substance. This number is called the Avogadro number. Thus, one mole of every elements contains Avogadro number of atoms.
Similarly, one mole of any compounds contains Avogadro number of molecules. One mole of Cl₂ contains 6.022× 10²³ Cl₂ molecules. Thus, the number of molecules in 500 moles of chlorine gas is calculated as follows:
Number of molecules of chlorine gas = 500 × 6.022× 10²³ = 3.01 × 10²⁶.
Therefore, there will be 3.01 × 10²⁶ number of molecules in 500 moles of chlorine gas.
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What happens when uranium-238 absorbs a neutron?
A. It is converted into large amounts of energy.
.
B. It becomes plutonium-239.
O
C. It becomes plutonium-238.
D. It becomes uranium-235.
Answer:
B. It becomes plutonium-239.
Explanation:
When uranium - 238 absorbs a neutron, it creates and becomes plutonium - 239 atom.
This is a nuclear fission process in which a radioactive nucleus is bombarded with a neutron:
²³⁸₉₂U + ¹₀n → ²³⁹₉₂Pu
The plutonium produced is not stable and it immediately disintegrates further.
Answer:
B.) It becomes plutonium-239
Explanation:
I got it correct on founders edtell
a sample of solid is decomposed and found to contain 6.52g of potassium, 4.34 g of chromium and 5.34 of oxygen, what is the empirical formula of the compound? help asap
Answer:
K₂CrO₅
Explanation:
The empirical formula is the simplest formula of a compound. To find the empirical formula, we follow the procedure below:
Elements Potassium Chromium Oxygen
Mass 6.52 4.34 5.34
Molar mass 39 60 16
Number of moles 6.52/39 4.34/60 5.34/16
0.167 0.072 0.333
Divide through by
the smallest 0.167/0.072 0.072/0.072 0.333/0.072
2.3 1 4.6
2 1 5
Empirical formula K₂CrO₅
what three things might influence a slide when conditions are right?
Answer:
3
Explanation:
The three things that can affect a condition to enforce a slide is friction, weight, and slope of an area. Solutions that can make flow easily are those that can create less friction depending on the condition of an environment where it is present.
Express 4,935,000 using standard scientific notation
Answer:
4.935×10-1
Explanation:
Take away the 0
How many moles of ethane gas, C2H6(g), will occupy 15.0 L at 30 degrees Celsius and 5.0 atm?
Answer:
3 mol
Explanation:
Given data:
Volume of ethane = 15.0 L
Temperature = 30°C
Pressure = 5.0 atm
Number of moles of ethane = ?
Solution:
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
30+273 = 303 K
5.0 atm × 15.0 L = n×0.0821 atm.L/ mol.K × 303 K
75 atm.L = n× 24.87 atm.L/ mol
n = 75 atm.L / 24.87 atm.L/ mol
n = 3 mol
How is drip irrigation better than canal irrigation?
Explain as well
unlike a sprinkler system that will Splash water all over the foliage of your plants a drip irrigation system will apply to water the plants where can easily be taken in by their roots
PLZ HELP BEING TIMED!!! PLZ ANSWER!!!!
Answer:its going to be a
Explanation:
Answer:
it will option A bcs motion increases when temp increases
Heat required to convert 2 g ice at -20°C into water at 20°C is (Specific
heat of ice 0.5 cal g-1 °C-1, latent heat of fusion of ice 80 cal g )
-20°C वाली 2 g बर्फ को 20°C वाले जल में रूपान्तरित करने में आवश्यक ऊष्मा है (बर्फ
की विशिष्ट ऊष्मा 0.5 cal g-1 °C-1 है, बर्फ के संलयन की गुप्त ऊष्मा 80 calg)
A
220 joule
220 जूल
220cal
100cal
22cal
Heat required = 220 cal
Further explanationGiven
2 g ice at -20°C into water at 20°C
c ice = 0.5 cal g-1 °C-1
Lf = 80 cal/g
Required
Heat
Solution
The heat needed to raise the temperature
Q = m . c . Δt
1. heat to raise temperature from -20 °C to 0 °C
Q = 2 x 0.5 x 20
Q = 20 cal
2. phase change(ice to water)
Q = m.Lf
Q = 2 . 80 cal/g
Q = 160 cal
3. heat to raise temperature from 0 °C to 20 °C ( c water = 1 cal/g.C)
Q = 2 . 1 . 20
Q = 40 cal
Total heat = 220 cal
If phosphofructokinase experienced a mutation that interfered with substrate binding, then what other enzyme is going to be most immediately impacted in terms of accessing substrate?
A. aldolase
B. fumarase
C. glucolactonase
D. hexokinase
Answer: A. aldolase
Explanation:
Phosphofructokinase, is an enzyme which is vital in the regulation of fermentation. It is involved in the glycolysis process.
When it experiences a mutation that was being interfered with the substrate binding, we should note that the enzyme that is going to be most immediately impacted in terms of accessing substrate is aldolase.
Annual precipitation rates can be collected for several years added together and divided by the number of years to obtain an average annual precipitation rate. True or false
Answer:
true
Explanation:
When performing a multiplication or division calculation, significant figures in the calculated result are dictated by the _____ of the measured numbers.
The calculated result should have ______ the measured number in the calculation with the fewest _______.
Answer:
fewest; the same significant figures with; measured numbers.
Explanation:
Without mincing words let us dive straight into the solution to the above question. In order to be able to use the significant figures properly one must know the rules attached to it uses. This is so, because they contributes to the precision of measurements.
When performing multiplication or division calculation, the number of significant figures in the answer[result] will be determined by the one with the smallest number of significant figure in the problem. Therefore, if we have 6.56 which is three[3] significant figures and 1.2 which is two[2] significant figures, then the number of significant figures will be two[2].
6.56 × 1.2= 7.872 = 7.9[ to 2 significant figures].
What is the name of this ether organic compound?
Answer:
1–ethoxybutane
Explanation:
In naming the above compound, the following must be observed:
1. The longest chain gives the root name of the compound.
2. The shorter chain is named as substituent together with the oxygen group as alkoxy.
3. Locate the position of the alkoxy group by giving it the lowest low count.
4. Combine the above to obtain the name of the compound.
Now we shall name the compound as follow:
1. The longest chain is carbon 4 i.e butane.
2. The shortest chain is ethyl (i.e –CH₂CH₃). This is named together with the oxygen atom as ethoxy.
3. The ethoxy group is located at carbon 1 of the butane chain since it is the functional group of the chain.
4. The name of the compound is:
1–ethoxybutane.
What is an isolated system?
O
A. A system that allows energy and mass to move in and out of it
B. A system that allows mass to move in and out but not energy
Ο Ο
C. A system that does not allow energy or mass to move in or out of
it
O D. A system that allows energy to move in and out but not mass
Answer:
Explanation: An isolated system is a system in which matter and energy both can not transfer through its boundry
Imformation you find on the periodic table
Answer:
Within each element square, information on the element's symbol, atomic number, atomic mass, electronegativity, electron configuration, and valence numbers can be found. At the bottom of the periodic table is a two row block of elements that contain the lanthanoids and actinides.
Explanation:
which activity is an example of a chemical change ?
Answer:
Okay so I have no idea what the options are but a chemical change is when you modify the substance itself.
LIKE....
burning paper
metal rusting
fireworks going off
C3H8 + 5 O2 → 3 CO2 + 4 H2O
a. 3.80 moles of oxygen are used up in the reaction. How many grams of water are produced?
b. How many grams of oxygen does it take to produce 90.6 grams of Carbon Dioxide?
Answer:
¹/3 C3H8(g) + ⁵/3 O2(g)
Explanation:
The coefficient before every molecule is representative of the number of moles. We can represent it in ration form so as to calculate the question;
C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(l) means;
For every 1 mole of C₃H₈(g) and 5 moles of O₂(g) produces 3 moles of CO₂(g) and 4 moles of H₂O(l).
Therefore to produce 1.00 mole of CO₂(g);
We represent it in ratio;
C₃H₈(g) : CO₂(g)
1 : 3
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We can write:
5/4 = 3,8/x
Solving for x:
x = 3,04 mols of H2O
Calculating the H2O mass:
M H2O = 18 g/mol
n = m/M
Solving for m:
m = 54,72 g of water
****************************
Using the same, but with molar mass:
M CO2 = 44 g/mol => 3 x 44 = 132 g
M O2 = 32 g/mol => 5 x 32 = 160 g
160/132 = x/90,6
solving for x:
x = 109,82 g if CO2
how does the disturbance travel through the coil when you move your arm back and forth?
Answer:
The waves travel in a direction parallel to direction of the vibration of the medium
The waves travel in a direction parallel to direction of the vibration of the medium
what is mechanical wave ?A mechanical wave is defined as an oscillation of matter which is responsible for energy transfer via medium.
The propagation of wave is limited by the medium of transmission, the oscillating material which revolve around a fixed point with little translational motion.
A surface wave which is an example of mechanical wave that propagate along the interface of two different media in physics. other common examples are Gravity waves on the surface of liquids, ocean waves.
Surface wave can be propagated in a slow way through Earth material and are generally lower in frequency than body waves.
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Describe the factors that affect the force of gravity
Answer:
gravity
Explanation:
gravity