Answer:
when two substances come together to create heat.
Explanation:
there have to be something to create heat.
which are exmaples of chemical change?
•baking cookies
• The statue of liberty's metal tarnishes from copper to green
• cold butter melts into liquid when heated
•salt is dissolved into freshwater
•Food scraps decompose into fertilizer in a compost pile
• frying changes the color and texture of an egg
•ocean water evaporates to water vapor on a hot day
•lighting a match
Answer:
C: salt is dissolved into freshwater
D: salt is dissolved into freshwater
F: frying changes the color and texture of an egg
G: ocean water evaporates to water vapor on a hot day
What is a colander used for?
A
measuring liquid and dry ingredients
B
straining liquid out of food
C
mixing ingredients together
D
separating egg yolks from the whites
Answer:
b is the answer have a good day
In the equation 2A1 + 3Fe(NO3)2 + 3Fe + 2AI(NO3),
iron has been replaced by what ?
Answer:
2Al +3Fe(NO3)2 --------> 3Fe + 2Al(NO3)3
In the above reaction Aluminum and iron nitrate reacts to produce iron metal and aluminum nitrate so aluminum is replace by iron
Please help due soon.
Answer:
X
Explanation:
because it is the greatest
Calcium solid is placed in a solution of iron (III) chloride producing calcium chloride and iron solid
Answer:
3Ca₍s₎ + 2FeCl₃ -------------------------------------------------------------> 3CaCl₂ + 2Fe₍s₎.
Explanation:
Iron(III) chloride is also known as Iron trichloride and it has the molar mass value of 162.2 g/mol and density of 2.9 g/cm³.
The balanced equation for the chemical reaction between solid calcium and iron (III) chloride is given below as:
3Ca₍s₎ + 2FeCl₃ -------------------------------------------------------------> 3CaCl₂ + 2Fe₍s₎.
This kind of chemical reaction is known as single displacement reaction or single replacement reaction.
Which energy level has the most energy available to it?
4
3
2
1
What is the weight of 9.228 mol of copper?
Answer in units of g.
Answer:
590.2524g .
Explanation:
Hsaio manages the finances for her company and has a particularly large amount of money budgeted for the purchase of calcium chloride, or CaCl2. Which type of company does Hsaio most likely own?
a snow-plowing service
a cosmetics factory
a pottery art studio
a catering business
Answer:
cosmetics factory
Explanation:
The company owned by Hsaio has been most likely to be the cosmetic factory. Hence, option B is correct.
What is a cosmetics factory?A cosmetic manufacturer is a company that manufactures cosmetic items. The products manufactured by the cosmetic industry include soap, shampoo, and toothpaste that smell good, such as perfume and deodorant.
The cosmetic industry products are formed to be viscous in nature, in order to be applied with ease in personal care. Calcium chloride has been the chemical agent that has been mediating to add viscosity to cosmetic products.
Since, Hsaio has been incorporating most of the budget of his company over calcium chloride, a product used in the cosmetic industry. Thereby he is most likely to own a cosmetic factory. Hence, option B is correct.
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If body fat has a density of .94g/mL and 4.0L of fat is removed, how many pounds of fat were removed?
Answer:
8.3lb of fat were removed
Explanation:
To solve this problem we need to convert the liters of fat removed to mL. Using the mL and density we can find the grams. To convert grams to pounds we must use (1lb = 453.592g):
mL fat:
4.0L * (1000mL / 1L) = 4000mL
g fat:
4000mL * (0.94g / mL) = 3760g of fat
lb fat:
3760g of fat * (1lb / 453.592g) =
8.3lb of fat were removedWhich bonds form in this reaction used to make ammonia, NHg?
Answer:the bonds between the two nitrogen atoms and between each pair of hydrogen atoms
Explanation:
Answer: the bonds between the nitrogen and hydrogen
Explanation: I just did it but it's possible you might have a different question
NH4 oxidation number
In the chemical formula for table sugar C12H22O11, How
many oxygen atoms are in each sugar molecule?
Answer:
Number of oxygen atom = 11
Explanation:
Given:
Table sugar C₁₂H₂₂O₁₁
In the given formula;
Number of carbon atom = 12
Number of hydrogen atom = 22
Number of oxygen atom = 11
Answer:2
Explanation:2w2222
Calculate the mass of Na
Answer:
22.98977
Explanation:
Na is actually sodium and its atomic number is 11.
I'm not sure if this is multiple choice or a question where you have to answer in writing but here is the mass of Na 22.98977.
Hope this helps
what host is used to make the flu vaccine and why can this host be a problem for some people?
The SI unit for force is the
Answer:
Newton, symbol N
which part of a human cell contains chromosomes
Answer:
nucleus
Explanation:
I’ll give people points if they answer this plz(math)
Which of these is a difference between a single skin cell and the skin tissue that covers an entire hand?
A.
A skin cell has a less complex structure than skin tissue has.
B.
A skin cell provides protection, but skin tissue does not.
C.
A skin cell grows more than skin tissue grows.
D.
A skin cell contains fluid, but skin tissue does not.
Answer:
A. A skin cell has a less complex structure than skin tissue has.
Explanation:
A skin cell has a less complex structure than skin tissue has. Hence option A is correct.
What is cell?Cell is defined as the smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. The three essential parts of a cell are the cell membrane, nucleus, and cytoplasm. From bacteria to humans, cells give all living things their structure and functionality.
The tiniest, structurally and functionally distinct, and typically microscopic, unit of an organism is called a cell. The several forms of material made up of specialized cells and their byproducts are referred to as tissues. Cells are very small. The size of tissues is macro.
Thus, a skin cell has a less complex structure than skin tissue has. Hence option A is correct.
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which part of the human body is more complex your heart of the circulatory system
Answer:
The circulatory system
Explanation:
The human body has two circulatory systems, the pulmonary system, and the systemic system.
3.A sample of chlorine contains 75% of 35
17Cl and 25% of 37
17Cl.
Calculate the relative molecular mass of chlorine.
Answer:
35.5
Explanation:
Given parameters:
Abundance of chlorine Cl - 35 = 75%
Mass of Cl - 35 = 35
Abundance of Cl - 37 = 25%
Mass of Cl - 37 = 37
Unknown:
Relative molecular mass = ?
Solution:
The relative molecular mass of the chlorine can be deduced using the expression below:
Relative molecular mass = (abundance x mass of Cl - 35) + ( abundance x mass of Cl - 37)
Relative molecular mass = (75% x 35) + (25% x 37) = 35.5
Help please please
Science atoms
Quick help
Answer:
step 3
Explanation:
electrons have a negative charge which is -1
protons have carry a positive charge +1
neutrons possessing no net charge which is 0
Minerals are only used for gemstones and jewelry.
True
False
Answer:
false
Explanation:
the answer is false because there is minerals in our water, ect.
Answer:
False because there are many minerals used for many different things
What is kinetic energy?
What frequency is radiation with a wavelength of 5.00 x 10^-6 cm? In what region of the electromagnetic spectrum is this radiation?
P.S it's due today
Answer:
f = 6 × 10^15 Hz in the ULTRAVIOLET (UV) region
Explanation:
Using λ = v/f
Where;
λ = wavelength (m)
v = speed of light (3 × 10^8m/s)
f = frequency (Hz)
According to this question, λ = 5.00 x 10^-6 cm
= 5.00 x 10^-8 m
λ = v/f
f = v/λ
f = 3 × 10^8 ÷ 5.00 x 10^-8
f = 0.6 × 10^(8+8)
f = 0.6 × 10^16
f = 6 × 10^15 Hz
In the electromagnetic spectrum (EM), a frequency of 10^15 is found in the ULTRAVIOLET region. This means that this radiation with a wavelength of 5.00 x 10^-6 cm and frequency of 6 × 10^15 Hz is in the ULTRAVIOLET region of the EM spectrum.
Natasha and Reanna observe a large airplane in the troposphere. Which experimental setup below would best determine how changing wind speeds might affect the airplane’s flight time to its destination?
The airplane's flight time is the test variable (independent variable), the wind speed is the outcome variable (dependent variable), and the airplane is the constant.
The airplane's flight time is the outcome variable (dependent variable), the wind speed is the test variable (independent variable), and the airplane is the constant.
The airplane's flight time is the constant, the wind speed is the outcome variable (dependent variable), and the airplane is the test variable (independent variable).
The airplane's flight time is the test variable (independent variable), the airplane is the outcome variable (dependent variable), and the wind speed is the constant.
Answer:
i am pretty sure the answer is a
Explanation: because the airplane's flight time has to be the independent variable for it to affect the dependent variable that is the speed of how fast the airplane is going.
Independent variables are test variables where we are testing its effects on the dependant variables. Here wind speed is the independent variable and time of flight is dependant variable.
What are variables?Variables are values or components in an experiment which can be measured and will change by time. In an experiment there are two kinds of variables namely independant and dependant variables.
Dependant variables are those which changes with effect of independent variables. For example if we are studying the effect of water quality in the population of fish in a pond. The independent variable is the quality of water and fish population is the dependent variable.
Here the time of flight depends on the wind speed. Thus, flight time is the dependant variable and wind speed is the test variable or independent variable.
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What does the calculated value of the equilibrium constant, Keq indicate regarding the degree of completeness of the reaction? In other words, at equilibrium, are there mostly products, reactants, or relatively large amounts of both?
Answer:
both
Explanation:
because equilibrium means that both sides of the reaction are equal
The concentration of the products is high at equilibrium if Keq is a large number (Keq > 1). The reaction in this instance encourages the production of products. The concentration of the reactants is high at equilibrium if Keq is a small number (Keq1).
What is equilibrium ?Chemical equilibrium is the condition where both the reactants and products are present in concentrations that have no further tendency to change over time, preventing any discernible change in the system's properties.
The size of a reaction when it is at equilibrium is represented by the equilibrium constant, K. It creates a ratio using the concentrations and coefficients of each reactant and product.
K is regarded as intermediate if it is larger than or equal to 0.001 but less than or equal to 1000. Significant quantities of reactants and products will be present. When the equilibrium constant K is big, products predominate at equilibrium, but when it is small, reactants predominate.
Thus, The concentration of the products is high at equilibrium if Keq is a large number.
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All can change the Earth suddenly and swiftly except
A. erosion
B. asteroid impact
C. landslide
D. eruption
Answer:
Asteroid impact
Explanation:
:)))) jdiedhdueu
Answer:
A)erosion takes time and besides deposition will come soon after
Explanation:
How many grams do 3.6 × 10^20 atoms of sodium weigh?
Answer in units of g.
Answer:
i
Explanation:
All parts of the rock cycle are connected, whether directly or indirectly. Which statement
best shows how sedimentary rocks are related to igneous rocks?
1.Under pressure, sedimentary rocks form from igneous rock.
2.Igneous rocks can weather, creating sediments that form sedimentary rocks.
3. During weathering, sedimentary rocks melt and form igneous rock.
4.Under pressure, igneous rock undergoes changes that form sedimentary rock.
Answer:
2. Igneous rocks can weather, creating sediments that form sedimentary rocks
Explanation:
Sedimentary rocks are formed from Igneous rocks when rocks are broken down by weathering.
3.4 g of AGno3 are dissolved to make a 200 ml solution what is the molarity
Answer:
hehe you might think im crazy but this answer makes no sEnSe
Explanation:
