Answer:
computer hardware is a collection of a physical part of a computer system
examples = CPU , monitor , mouse etc
What is the primary difference between a molecule and a compound?
A. All molecules are compounds, but not all compounds are molecules
B. Molecules always contain only one type of atom, unlike compounds
C. Compounds must be composed of more than one type of atom
Answer:
A. "All molecules are compounds, but not all compounds are molecules"
Explanation:
An example of a compound-molecule is oxygen. The elemenal is O, because the periodic table isn't describing molecules, it's describing atoms. The molecule is O2 because it takes 2 O atoms to make a molecule of oxygen.
The primary difference between a molecule and a compound is 'compounds must be composed of more than one type of atom'.
Explanation:
A molecule is a group of atoms of the same or different types of atoms bound to each other.Molecules are the smallest unit of a substance that possesses the characteristic of the substance.A compound is a substance in which two or more different types of atoms are bound to each other.In compounds, atoms of different elements are in a fixed proportion.So, from this, we can conclude that the primary difference between a molecule and a compound is 'compounds must be composed of more than one type of atom'.
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How do you find the scientific notation of a Avogadro's number??
Answer: ummmmmm hmmmmm
Explanation:
what phase of matter changes volume when moved from one container to another ?
Answer:
gas
Explanation:
Gas
Explanation:
The volume of gas varies inversely with the pressure, when temperature is kept constant.
If the amount of gas in a container is increased, the volume increases. If the amount of gas in a container is decreased, the volume decreases.
Silver nitrate reacts with calcium chloride as
shown.
2 AgNO3 + CaCl2 → 2 AgCl + Ca(NO3)2
How many grams of CaCl2 would be required to completely react with 420 mL of
0.506 M AgNO3 solution?
Answer in units of grams.
Answer:
11.8g of CaCl₂ would be required
Explanation:
To solve this question we need to find the moles of AgNO₃ in the solution. Thus, and using the chemical reaction we can find the moles of CaCl₂ required for a complete reaction and its mass as follows:
Moles AgNO₃:
420mL = 0.420L * (0.506mol / L) = 0.213 moles AgNO₃
Moles CaCl₂:
Based on the chemical reaction, 2 moles of AgNO₃ react per mole of CaCl₂.
The moles of CaCl₂ that will react are:
0.213 moles AgNO₃ * (1mol CaCl₂ / 2 mol AgNO₃) = 0.106 moles CaCl₂
Mass CaCl₂ -Molar mass: 110.98g/mol-
0.106 moles CaCl₂ * (110.98g / mol) =
11.8g of CaCl₂ would be requiredhow many molecules are present in a sample of carbon dioxide, CO2 with a mass of 168.2g?
Answer:
2.3 X 10^24 atoms CO2
Explanation:
Answer:
2.30 x10²⁴ molecules CO2
Explanation:
Convert mass of CO2 to moles
Convert moles of CO2 to molecules using Avogadro's number.
168.2 g CO2 x 1 mole CO2 / 44 g CO2 x 6.022 x10²³ molecules CO2 / 1 mole CO2
= 2.30 x10²⁴ molecules CO2
Which of the following could be an empirical formula? a C2H4 b C4H10 c N2O4 d BaO2
Answer:
B C4H10 will be the empirical formulae.
What is the volume of 3.5 moles of chlorine gas at standard temperature and pressure (STP)? (3 points)
6.4 L
22 L
32L
78 L
Answer:
78
Explanation:
Balance this equation. C(s)+H2(g) -> CH4(g)
Helpp me pretty please
Another alloy called nichrome contains only the elements chromium and nickel how much nickel dies it have
Answer:
80 g
Explanation:
Alloy = nichrome
100 g of nichrome contains 20 g of chromium
Contains only two elements (Nickel and Chromium) hence;
Mass of Alloy = Mass of Nickel + Mass of Chromium
100 = Nickel + 20g
Nickel = 100 g - 20 g = 80 g
Using the equation below, calculate the percent yield of H3PO4 if an experiment that started with 12.98 grams of HCl and excess Na3PO4 yielded 8.42 g of H3PO4. Please round to the nearest 0.01 and remember units and substance.
Na3PO4 + HCl --> NaCl + H3PO4
When people say that something "adapts" to a situation or environment, changing so that they are comfortable or better suited to survive. Why is this statement incorrect in a scientific sense? Explain your understanding of scientific adaptation and why this statement presents a misconception.
How many electrons are in the nucleus of an atom with 2 protons and 3 neutrons
Answer:
there'd be 2 electrons
Explanation:
number of electrons= number of protons
blank a long narrow Stepside value that forms the deepest part of the ocean
Answer:
The answer is a trench
Show work please ?...........
Answer:
NO
Explanation:
NO NO NO
i am way to much of an idiot for this (hope i made you laugh (and mad cuz i did not answer) :3)
What is humidity?????????
Answer:
it is the moisture in the air
Explanation:
if we buy a dehumidephire we see that it collets water from the air
Answer:
Humidity describes the amount of water vapor or water molecules in the air. Weather scientists use the term “relative humidity,” which Joe Sobel, a meteorologist and senior vice president at Accuweather described as “a comparison of the amount of moisture in the air versus the amount of moisture the air could hold.”
Explanation:
How many moles of NH3 can you make from 6.20 moles of N2?
The term mole concept is used here to determine the moles of ammonia. The number of moles of ammonia which can be make from 6.20 moles of N₂ is 12.4.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:
Number of moles = Given mass / Molar mass
You need one nitrogen atom to produce ammonia. Here we can see that there are two nitrogen atoms in N₂.
One mole of any substance contains Avogadro number of molecules. A mole is defined as the mass of the substance which consists of the equal quantity of basic units.
The number of moles of ammonia from 6.20 moles of N₂ is:
6.20 × 2 = 12.4
Thus the number of moles is 12.4.
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Which substance is a binary acid?
• hydrochloric acid
O phosphoric acid
• nitrous acid
O sulfuric acid
Answer:
hydrochloric acid
Explanation:
Which of the following is an example of acceleration?
A. A boat sits on a boat trailer.
B. A car moves in a straight line at 60 km/hr.
C. A plane moves in air at a steady speed of 850 km/hr.
D. A bus moves on a straight road and then
makes a right turn.
Answer:
it's either B. or C.. hope this helps!
Explanation:
Answer:
D. A bus moves on a straight road and then makes a right turn.
Explanation:
Acceleration is a change in direction or speed. All of the other examples involve straight lines or constant speed.
2.50 L of gas originally at 50 K is warmed to 80 K. If the pressure remains constant, which gas law needs to be used to find the new volume?
Select one:
a.Charles law
b.Gay-Lussac’s law
c.Boyle’s law
d.Combined gas law
If the pOH of a cesium hydroxide solution is known to be 4.00. what is the (OH)? *Please round your answer to the appropriate number of significant figures. Your answer can be in standard notation o "e" in place of x10.* 1
Answer:
i going to be aniston i would say take a gess
The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. The concentration of OH⁻ is 1 × 10⁻⁴ M.
What is pOH?The pOH expresses the hydroxide ion concentration of a solution. The pOH of a solution is defined as the negative logarithm to the base 10 of the value of the hydroxide ion concentration in moles per litre.
The equation used to calculate the concentration of OH⁻ is:
pOH = -log [OH⁻]
[OH⁻] = 10⁻pOH
[OH⁻] = 10⁻⁴
= 0.0001 M
The number of significant figures in a reported value is the number of digits that are known with certainty plus the last one having some uncertainty.
Here 0.0001 contains 3 significant figures. In scientific notation it can be represented as 1 × 10⁻⁴ M.
Thus the concentration of [OH⁻] is 1 × 10⁻⁴ M.
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what type of galaxy is this
Explanation:
it is an spiral as it are rounded so
It is a spiral type of galaxy.
What is the mass percent of carbon in glucose, C6H1206?
Answer:
40%
Explanation:
hope this helps!!!!
I NEED HELP NOWWW.!
Sexual reproduction influences genetic variation. Which of the following properly describes the influence that sexual reproduction has on genetic variation?
A) Crossing over occurs during meiosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.
B) Crossing over occurs during mitosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.
C) Crossing over occurs during mitosis, which results in the exchange of alleles between sister chromatid. This exchange of genetic material allows for the production of identical combinations of alleles in gametes and a decrease in genetic variation.
D) Crossing over occurs during meiosis, which results in the exchange of alleles between sister chromatid. This exchange of genetic material allows for the production of identical combinations of alleles in gametes and a decrease in genetic variation.
Answer:
C
Explanation:
The statement that best describes the influence that sexual reproduction has on genetic variation is as follows:
Crossing over occurs during mitosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.Thus, the correct option for this question is B.
What is Crossing over?Crossing over may be defined as a biological mechanism through which genetic material gets exchanged between the non-sister chromatids of the homologous chromosomes. The process of crossing over occurs in the Pachytene stage of mitosis.
Option C is incorrect because the process of crossing over never occurs between sister chromatids. So, it is eliminated. While options A and D are incorrect because they describe the mechanism of crossing over in the sense of meiosis which is absolutely incorrect.
Therefore, the correct option for this question is B.
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How many ions are in the following compounds?
a. (NH4)3PO4 =
b. NaCl =
Answer:
A- In (NH4)3PO4 there are four ions in total as three ions of NH₄ and is one ion of PO₄
The model below represents a molecule of ammonia gas.
Ammonia gas would be classified as?
A) element
B) atom
C) compound
D) mixture
Ammonia gas is a compound that is made up of two elements, nitrogen and hydrogen. So, option C is right.
A compound is a substance that is made up of two or more elements chemically combined. Ammonia gas is made up of the elements nitrogen and hydrogen, which are chemically combined in the ratio of 1:3.
Elements are the basic building blocks of matter. They cannot be broken down into simpler substances by chemical means. Atoms are the smallest unit of an element that can exist.
Mixtures are substances that are made up of two or more elements or compounds that are not chemically combined. The components of a mixture can be separated by physical means, such as filtration or distillation.
An atom is the smallest unit of an element that can exist and ammonia gas is not an atom because it is not the smallest unit of an element.
Therefore, option C, compound is correct.
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Name 3 elements that are found in the human body
Answer:
oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Explanation:
the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
A small cart with a mass of 3.0 kg is accelerated from rest and obtains a final velocity of 24 m/s, East in 8.0 s. If friction is neglected, what net force is applied.
a
24 N
b
8.0 N
c
72 N
d
9.0 N
Answer:
A.
Explanation:
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When a new substance has formed, has a physical or chemical) change occurred?
(4 Points)
A) chemical
B) physical
Answer: A) Chemical Change
Explanation:
A chemical change create a NEW type of matter that CANNOT be reversed!
Example: Spolied milk
Example: Green tomatoe turns red
Hope it’s helpful! :)
What is the term for combining 2 or more atoms together?
atom
O molecule
O element
O compound