Answer:
Boiling point of the solution is 100.78°C
Explanation:
This is about colligative properties.
First of all, we need to calculate molality from the freezing point depression.
ΔT = Kf . m . i
As the solute is nonelectrolyte, i = 1
0°C - (-2.79°C) = 1.86 °C/m . m . 1
2.79°C / 1.86 m/°C = 1.5 m
Now, we go to the boiling point elevation
ΔT = Kb . m . i
Final T° - 100°C = 0.52 °C/m . 1.5m . 1
Final T° = 0.52 °C/m . 1.5m . 1 + 100°C → 100.78°C
which of the following statements is/are true about the atom labeled X in the attached picture
.Explanation: ..............
why scientists use the word dominant
Answer:
Dominant traits are traits that more likely to be transferred from a parent to an offspring so scientist use this term dominant.
Answer:
Scientists use the word dominant for certain traits because they are more likely to show up. There are two different types of alleles for traits: dominant and recessive. Capital letters mean dominant and lowercase mean recessive. Scientists also use the word dominant for certain traits when certain traits stand out and are more prone to show up in offspring.
A marble was rolled along the a flat surface. The position and data was collected.
What type of graph would best represent the data?
A. Pie chart
B. Bar graph
C. Histogram
D. Scatter plot
How were the ideas of Aristotle and Democritus similar to the alchemists'?
Answer:
The ideas of Aristotle and Democritus were on a similar basis to the alchemists.
Explanation:
Aristotle believed that all matter was made from four elements: earth, air, fire, and water. Democritus was the first person to realize that if something was cut in half continuously it can never be broken down completely. Democritus called the units that could not be broken down atoms. Early alchemists believed and based their works on the notion that atoms could be rearranged into making new elements. All three of their ideas more or less work with atoms and elements.
a balance reads an object A to be 45.1kg the balance reads another object B to be 33.46kg what is the total weight of both objects
All we need to do is add.
45.1 + 33.46 = 1509.046
Therefore, the total weight of both objects is 1,509.046kg
Best of Luck!
does ice steam or water have more energy
Answer:
steam.
Explanation:
Gasses have the most kinetic energy compared to liquids and solids.
steam is the gaseous form of h2o
water is the liquid form and ice is the solid
which light would you predict to produce the greenest plant
Explanation:
The light of the sun is important for green plant to grow
What is one important step to complete before starting a laboratory experiment?
O Clean up the materials that were used.
Discard chemicals in the proper waste bin.
O Ask the teacher if you are confused about the laboratory procedure.
Change into contact lenses to protect your glasses,
Answer:
Ask the teacher
Explanation:
Ask if you have to clean up or if you are not prepared for an experiment
Answer:
ask the teacher
Explanation:
because he needs help so he has to task the teacher.
Why shouldn’t we fill up balloons with hydrogen gas ?
Answer: Because hydrogen is a gas.
Explanation: If children were running around with balloons filled with hydrogen gas, then they would catch fire. So the answer to your question is, its simply dangerous.
Number of
Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
20
20
A
B
С
9
D
E
19
F
Using the periodic table, complete the table to describe each atom. Type in your answers.
Answer:
symbol= F
proton= 9
neutron= 19 I understand this is it ok for you
A bar if soap is 12cm tall 6 cm wide and 10 cm long if has a mass of 415 grams what is the density is
Answer:
density= mass/volume. volume= 12 x 6 x 10. 415/720=.57g/cm^3
Explanation:
Answer: 0.58g/cc density of the Soap.
Explanation:
A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy level?
A. zero in the first energy level, eight in the second energy level
B. eight in the first energy level, zero in the second energy level
C. four in the first energy level, four in the second energy level
D. two in the first energy level, six in the second energy level
Answer:
energy level I can hold a maximum of two electrons, and energy level II can hold a maximum of eight electrons. so it must be D
Explanation:
two in the first energy level, six in the second energy level
i took the test already you can go to my quizlet to get study cards for the test
starting from phenol how would you obtain benzaldehyde
Answer:
A significant quantity of natural benzaldehyde is produced from cinnamaldehyde obtained from cassia oil by the retro-aldol reaction: the cinnamaldehyde is heated in an aqueous/alcoholic solution between 90 °C and 150 °C with a base (most commonly sodium carbonate or bicarbonate) for 5 to 80 hours, followed by ...
Explanation:
Can someone find the independent variable and the dependent variable ?
Which of the following properties of an unknown substance would allow it to be classified as a mixture? The unknown substance
Answer:
D. has different properties when sampled in different areas.
Explanation:
The general property of a mixture says that each substance or component in a mixture has its individual or different property which can be separated on the basis of different methods.
Such as a mixture of oil and water is a heterogeneous mixture and have different properties or different densities, which helps them to be sampled in different areas.
Hence, the correct answer is "D".
What NaClNaCl concentration results when 259 mL259 mL of a 0.850 M0.850 M NaClNaCl solution is mixed with 567 mL567 mL of a 0.240 M0.240 M NaClNaCl solution?
Answer:
0.431M
Explanation:
To find the concentration of NaCl we need to know how many moles comes from each solution. Then, we need to sum the total volume in liters and, as molarity (Unit of concentration) is the ratio between moles and volume we can determine concentration.
Moles from first solution:
259mL = 0.259L * (0.850mol / L) = 0.22015 moles of NaCl
Moles from second solution:
567mL = 0.567L * (0.240mol / L) = 0.13608 moles of NaCl
Total moles:
0.22015 + 0.13608 = 0.35623 moles of NaCl
Total volume:
259mL + 567mL = 826mL = 0.826L
Thus, molarity of the mixture is:
0.3562 moles NaCl / 0.826
0.431M
Total these measurements. Your answer should indicate the proper accuracy.
28 L
42 L
6 L
931 L
____
Your answer should indicate the proper precision (correct number of insignificant figures).
1. 1,010 L
2. 1,007.0 L
3. 1,007 L
4. 1,000 L
Answer:
The sum of given measurements is 1007 L.
Explanation:
The given measurements are 28 L, 42 L, 6 L, and 931 L.
We need to find the total of these measurements.
Total = 28 L + 42 L + 6 L + 931 L
It can be written as
Total = ( 28 +42+6+931)
One simplification we get Total = 1007 L
3. Complete the following conversions.
a. 10.5g=__kg
b. 1.57 km = ___m
c. 3.54 ug = ___g
d. 3.5 mol=___umol
e. 1.2 L = ___mL
f. 358 cm = ____m3
g. 548.6 ml. =____cmii
Answer:
a. 0.0105
b. 1.570
c. 0.00000354
d. 35,000,000
e. 1200
f. 0.000358
g. 548.6
The complete conversion of the given examples are as follows:
a. 10.5g = 0.00105 kg
b. 1.57 km = 1570 m
c. 3.54 ug = 3.54 × 10⁻⁵ g
d. 3.5 mol = 3.5 × 10⁶ umol
e. 1.2 L = 1200 mL
f. 358 cm = 3.58 × 10⁻⁴ m³
g. 548.6 ml = 548.6 cm
Conversion is a multi-stage procedure, which requires a numerical factor to multiply or divide and the appropriate selection of a number of important digits.
Using the International System Units for Conversions Factors.
(a)
If 1 g = 0.001 kg
∴
10.5 g will be:
[tex]\mathsf{= \dfrac{10.5 \ g \times 0.0001 \ kg}{1 \ g}}[/tex]
= 0.00105 kg
(b)
If 1 km = 1000 m
1.57 km will be:
[tex]\mathsf{= \dfrac{1.57 \ km \times 1000\ m}{1 \ km} }[/tex]
= 1570 m
(c)
If 1 ug = 1 × 10⁻⁵ g
∴
3.54 ug will be:
[tex]\mathsf{= \dfrac{3.54 \mu g \times 1 \times 10^{-5} \ g }{1 \ \mu g}}[/tex]
= 3.54 × 10⁻⁵ g
(d)
If 1 mol = 10⁶ umol
∴
3.5 mol will be:
[tex]\mathsf{= \dfrac{3.5 \ mol \times 10^6 \ u \ mol}{1 \ mol} }[/tex]
= 3.5 × 10⁶ umol
(e)
If 1 L = 1000 mL
∴
1.2 L will be:
[tex]\mathsf{=\dfrac{1.2 \ L \times 1000 \ mL}{1 \ L}}}[/tex]
= 1200 mL
(f)
If 1 cm = 0.000001 m³
∴
358 cm will be:
[tex]\mathsf{= \dfrac{358\ cm \times 0.000001 m^3}{1 \ cm}}[/tex]
= 3.58 × 10⁻⁴ m³
(g)
If 1 mL = 1 cm
∴
548.6 mL will also be equivalent to 548.6 cm
Therefore, from the above explanation, we've seen how to convert from one unit to another.
Learn more about conversion rates here:
https://brainly.com/question/5685229?referrer=searchResults
Which statements about volume are true? Choose all the answers that apply. Group of answer choices Does not apply to liquids Applies only to objects with irregular shapes Measures the amount of space occupied by an object Equals the displacement of an object in water Lacks physical dimension Can be measured in milliliters or cubic centimeters
Answer: Measures the amount of space occupied by an object
Equals the displacement of an object in water Lacks physical dimension Can be measured in milliliters or cubic centimeters
Explanation:
The statements which are true about volume are;
Measures the amount of space occupied by an object.Equals the displacement of an object in water.Discussion:
The volume of an object is a measure of the space it occupies. On this basis is the definition of matter as an object that occupies space.
Additionally, when an object is immersed in water; it's volume equals the volume occupied by the water displaced by it.
Read more;
https://brainly.com/question/898827
Round 1047.78 to three sig figs
105
100
1030
Answer:
1047.78
nearest tens is 1047.70
nearest thousandth is 1050.78
What do group numbers on the periodic table identify?
valence electrons
which is an outer shell electron
How can nuclear energy be converted in electrical energy
Answer:
A clean energy resource
Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.
Explanation:
Answer:
Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.
Explanation:
All of the atoms of argon have the same
a
mass number
b
atomic number
c
number of neutrons
d
number of nucleons
The answer is same atomic number!
Find the distance between the two points on a number line
-18 and -4
Answer:
14
Explanation:
Which is a base unit used in the metric system? quarts liters pints degrees Fahrenheit
Answer:
liters
Explanation:
the answer is liters after searching and searching and searching i found it now i winnnn
Answer:
LITERS (B)
Explanation:
How would you separate a mixture of sand, salt, and iron?
(Put it in a list)
in descriptive scientific investigations scientis often make observations to understand the interacting parts of a complex
The answer is System.
When a scientific investigation is in progress, its used to perform and understand the natural phenomenon that goes on using the scientific method. Since this is a descriptive investigation, it provides a descriptive account of any system by looking at it without any prior knowledge to that subject. This method of investigation does not use a hypothesis. Thus, proves our answer correct.
Best of Luck!
Answer:
The answer is System.
Explanation:
When a scientific investigation is in progress, its used to perform and understand the natural phenomenon that goes on using the scientific method. Since this is a descriptive investigation, it provides a descriptive account of any system by looking at it without any prior knowledge to that subject. This method of investigation does not use a hypothesis. Thus, proves our answer correct.
Based on the physical appearance of the two crystal samples, which is a metal?
Answer:
The Answer Is: A: Sample A
Explanation:
Because It Is Shiny ( Part of what the person said on edge)
Answer:
Sample A
Explanation:
On edg 2020
Sorry is if i'm answering this late. T^T
Why can’t you taste or touch any materials at the Laboratory
Siya saw two elements X and Y. Element X is shiny and hard, while element Y is dull and
brittle. Which of the two elements is more likely to be a good conductor of electricity?
Answer:element x
Explanation:because element x is shiny and hard and that's a property of metals and metals are good conductors of heat and electricity