Answers
31. compound
32. element
33. compound
34. compound
34. mixture of elements and compounds
Related Questions
What is a measure of the amount of
matter (particles) in an object?
A. Length
B. Mass
C. Weight
D. Volume
Answers
Answer:
B. Mass
Explanation:
Matter is all the “stuff” that exists in the universe. It has both mass and volume. · Mass measures the amount of matter in a substance or an object.
hope i helped
Mass=matter in a object
Weight= the force exerted on an object by gravity
Which type of model best represents crystals?
A. ribbon
B. space-fill
C. ball-and-stick
D. Lewis dot
Answers
A space filling model is a representation in which atoms of a compound appear as spheres of equal diameter. Crystals are best represented using space filling model.
Crystals are composed of atoms or molecules of a substance that are arranged in a regular and repeating pattern.
While ball and stick models offer an effective representation for discrete molecules, a space filling model is more apt for a crystal since the components are repeating at regular intervals.
Hence the correct answer is option B: space-fill. The space filling model of sodium chloride crystal is shown in the image attached.
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What are the differences of a physical change and a chemical change?
Answers
Answer:
a physical change only changes the look of something whereas a chemical change occurs when one thing has a reaction and it forms a new substance.
Which option is an isotope with 6 protons and 8 neutrons?
A - carbon-14
B - oxygen-14
C - carbon-8
D - oxygen-6
Answers
Vanadium (V) phosphate
Cobalt(II) sulfide
Beryllium nitrate
Silver sulfate
Manganese(IV) oxide
Manganese(II) fluoride
Carbonic acid
Carbon dioxide
name them
Answers
V2O5
CoS
BeN2O6
Ag2SO4
MnO2
MnF2
H2CO3
Co2
what is joules? plz help
Answers
Subject:.
Date:
8 a) vinyl
chloride C₂H₂ is prepared by the reaction of ethyne gas C₂H₂ with hydrochloric
acid, HCl.
Answers
Answer:
Yes it is true
Explanation:
vinyl chloride is prepared by c2h2+hcl. Since vinyl chloride is formed after ETHYNE IS MIXED WITH CHLORIDE.
Which element forms a chloride of the type XCl2
A:strontium
B:xenon
C:antimony
D:tellurium
E:tin
F:iodine
Answers
Explanation:
Element X forms a chloride with the formula XCl 2 , which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as. (a) Na (b) Mg (c) Al (d) Si. the answer is Mg .
Technician A says it is OK to have poor safety practices because you can always clean up the mess. Technician B says keeping a high standard of personal hygiene and cleanliness is important so that you get into the habit of washing off harmful materials as soon as possible after contact. Who is correct? Select one: a. Technician A O b. Technician B O C. Both A and B O d. Neither Anor B
Answers
Tell me the mass number of an atom with 4 protons, 5 neutrons, and 2 electrons.
Answers
Answer:
I'm pretty sure your answer will be 9
Answer:
9
Explanation:
Mass number = proton + neutron
= 4 + 5
= 9
3. If we remember seeing something happen, we can trust that it happened just as we think it did. True or False
Answers
[tex] \huge{ \underbrace{ \overbrace{True}}}[/tex]
.
[tex]\huge\mathfrak\purple{Hope \: it \: helps}[/tex]
Note : Because Many of My Dreams came true and I realized.
Which of these statements best describes how mining of minerals helps solve societal problems?
A) By reducing pollution in air.
B) By removing contaminants from the soil.
C) By improving the condition of groundwater.
D) By providing jobs to the unemployed people
Answers
Answer:
d cause it is
Explanation:
Solve the following equation for
x. 4x+6=-10
Answers
[tex]\\ \sf\longmapsto 4x+6=-10[/tex]
[tex]\\ \sf\longmapsto 4x=-10-6[/tex]
[tex]\\ \sf\longmapsto 4x=-16[/tex]
[tex]\\ \sf\longmapsto x=\dfrac{-16}{4}[/tex]
[tex]\\ \sf\longmapsto x=-4[/tex]
4x + 6 = - 10
4x = -10-6
4x = -16
x = -16/4
× = -4
The reaction described by the equation X + Y Z
shown to have the following rate law:
R = K[X] [Y]
What is the effect on the rate if the concentration
of [X] is doubled and [Y] remains constant?
Answers
A chunk of copper has a volume of 20.0 mL. What is its mass?
Answers
The mass of the chunk of copper is 179.2g
WHAT IS DENSITY:
Density of an object refers to its mass in relation to its volume i.e. density can be calculated by dividing the mass of an object by its volume. This means that if the density of an element or substance is known, the mass can be calculated in a given volume.The density of Copper element is 8.96g/mL
Since density = mass (g) ÷ volume (mL)
8.96 = mass ÷ 20mL
mass = 20 × 8.96
mass = 179.2g
Therefore, the mass of the chunk of copper is 179.2g
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An ion is formed by either
Answers
Explanation:
By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion. When an ion is formed, the number of protons does not change.
Answer:
Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions.
Explanation:
by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms. Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.
At what temperature does water boil if 75.0 g of glucose (180.1 g/mol) is added to 400 g of water?
A. 100.25 degree C
B. 100.53degree C
C. 100.84degree C
D. 101.39degree C
E. 101.94degree C
Answers
Answer:
A
Explanation:
Because it have more glucose
At 100.25 degree C temperature does water boil if 75.0 g of glucose (180.1 g/mol) is added to 400 g of water. Hence option A is correct.
What is temperature?Temperature is defined as the measuring a substance's degree of heat or cold. The direction of heat transfer when two bodies with different temperatures are kept in touch depends on the temperature. An instrument that measures temperature is a thermometer.
Glucose is defined as one of the carbohydrates classified as simple sugars. The brain is the most energy-hungry organ in the body and uses half of the body's sugar energy due to its abundance of nerve cells, or neurons. Thinking, memory, and learning are all tightly correlated with blood glucose levels and how effectively the brain uses this fuel.
Thus, at 100.25 degree C temperature does water boil if 75.0 g of glucose (180.1 g/mol) is added to 400 g of water. Hence option A is correct.
To learn more about temperature, refer to the link below:
https://brainly.com/question/11464844
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Write the electronic configuration of elements from Hydrogen to Calcium
ans as fast as you can
Answers
Answer:
Hydrogen (H) 1s1
Helium (He) 1s2
Lithium (Li) 1s2 2s1
Beryllium (Be) 1s2 2s2
Boron (B) 1s2 2s2 2p1
Carbon (C) 1s2 2s2 2p2
Nitrogen (N) 1s2 2s2 2p3
Oxygen (O) 1s2 2s2 2p4
Fluorine (F) 1s2 2s2 2p5
Neon (Ne) 1s2 2s2 2p6
Sodium (Na) 1s2 2s2 2p6 3s1
Magnesium (Mg) 1s2 2s2 2p6 3s2
Aluminum (Al) 1s2 2s2 2p6 3s2 3p1
Silicon (Si) 1s2 2s2 2p6 3s2 3p2
Phosphorus (P) 1s2 2s2 2p6 3s2 3p3
Sulfur (S) 1s2 2s2 2p6 3s2 3p4
Chlorine (Cl) 1s2 2s2 2p6 3s2 3p5
Argon (Ar) 1s2 2s2 2p6 3s2 3p6
Potassium (K) 1s2 2s2 2p6 3s2 3p6 4s1
Calcium (Ca) 1s2 2s2 2p6 3s2 3p6 4s2
Explanation:
How much of a chemical should you take?
Answers
Answer:
No more than 0.1 mL of hydrochloricton acid
How many molecules are their in o.5 mole of H2o
Answers
Answer:
There are 6.022x10^23 molecules
3. Write the chemical formula of the following compounds using criss-cross
method:
a. Sodium Oxide
b. Silver Oxide
Answers
Answer:
a) Na2O
b) Ag2O
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Which of the following words means "the degree to which a measurement is precise and reliable"?
a. variable
b. accuracy
c. parameter
d. constant
Answers
What is a mixture? How will you separate the components of a mixture containing sugar, sand and water?
Answers
Answer:
Mixture is combination of two or more substances
Explanation:
The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.
Name the type of reaction illustrated
Answers
Answer:
It is a reversible esterification reaction.
Explanation:
[tex].[/tex]
Chris wrote a few steps to describe how carbon circulates between the ground and living organisms
Step 1. Trees absorb carbon dioxide in the air and use it to make their own food using photosynthesis
Step 2. When plants or animals die, they are broken down by decomposers and their carbon returns to the soil
Step 3. Carbon stays in the ground for long-term storage as fossilized carbon
If step 1 is removed, which statement best describes the effects of this missing step on the carbon cycle?
More carbon is stored in the ground for long-term storage.
Less carbon is available for plant and animal growth
More carbon is stored in plants instead of the ground
There are more fossil fuels available for energy use
Answers
If Step 1 is missing, there will be less carbon available for both plant and animal growth.
Description of the process of photosynthesisThe steps written down by Chris to describe how carbon is circulates between the ground and living organisms form part of the carbon cycle.
In the first step which is photosynthesis, plants such as trees absorb carbon dioxide from the air and use it to make their own food.
Also the food made by plants during photosynthesis serve as a source of carbon for both the plants as well as animals and other organisms which depends on plants as their carbon source for growth.
ConclusionTherefore, if Step 1 is missing, there will be less carbon available for both plant and animal growth.
Learn more about photosynthesis and carbon cycle at: https://brainly.com/question/17894017
Answer: B
Explanation:
Is burning a lot a physical or chemical change?
Answers
burning is irreversible change so its chemical change
a substance made up of similar atoms
Answers
Answer:
A pure substance composed of the same type of atom throughout. Compound: A substance made of two or more elements that are chemically combined in fixed amounts.
What is light energy absorbed by?
Answers
Answer:
I think in the light-dependent reactions, energy absorbed by sunlight is stored by two types of energy-carrier molecules: ATP and NADPH. The energy that these molecules carry is stored in a bond that holds a single atom to the molecule. For ATP, it is a phosphate atom, and for NADPH, it is a hydrogen atom.
Hope this help you!:)
The following reaction is exothermic. 2 N2O(g) 2 N2(g) O2(g) This means the reaction: 56) A) will be spontaneous only at low temperatures B) is not spontaneous at any temperature C) will be spontaneous only at high temperature D) will be spontaneous at all temperatures E) cannot determine without temperature
Answers
For exothermic processes, spontaneity will only occur if the entropy positive with all temperature or if the entropy is negative with only low temperature.
Since the given equation decomposed from 2 moles of gas into 3 moles of gas, we know that entropy is positive. Thus the reaction will be spontaneous at all temperature.
D is the answer
What is the final temperature of water given an initial temperature of 28 ˚C, a mass of 7 g, and heat (q) of 184 J (Specific Heat of water = 4.184 )?
Answers
Answer:34.28 Degree celcius
Explanation:The heat given is equal to the change in temperature multiplied by the mass and the specific heat capacity
This gives the equation:Q=mc∆T
Where Q=184,m=7, specific heat capacity=4.184,∆T=X-28,
But ∆T=Final temperature (T'')-Initial temperature (T')
Therefore the equation becomes
184=7×4.184(X-28)
Solving the remaining linear equation gives you X as 34.28°C