Answer:
two dots around each side.
Explanation:
The recessive trait disappears in a genetic cross.
True
or
False
Answer:
True
Explanation:
Question 1
1 pts
What part of our planet protects the planet and traps gases inside of our planet?
O hydrosphere
O Earth surface
O atmosphere
core
Help please! What is the number that can balance the equation KClO3 → 2KCl + 3O2?
Answer:
2KClO3 → 2KCl + 3O2 is balanced equation
Explanation:
Which of the following molecules has a central atom with precisely two unshared
pairs of electrons?
(Look at the chart) You are trying to figure out the identity of a lump of yellow metal you found. You use a scale to determine that it has a mass of 50g.
You fill a container with 100mL.
What kind of metal is the lump you found?
LOOK AT THE CHART
-impossible to know
-gold
-copper
-silver
Explanation:
Volume of solid metal = 102.6ml - 100ml = 2.6ml.
Mass of solid metal = 50g.
Density = Mass / Volume = 50g / 2.6ml = 19.2g / cm³.
Also from our knowledge, only gold metal is yellowish here.
Hence the answer is gold metal.
Se sabe que un compuesto contiene 33.002% de carbono,9.063% de hidrogeno y el resto de oxigeno. El espectrometro de masas indica que la masa molecular aproximada es de 191g/mol(cual es la formula empirica y molecular probable
Answer:
CH3O
C6H18O6
Explanation:
Porcentaje de masa de oxígeno = 100% - (33,002% + 9,063%) = 57,935%
Divida el porcentaje en masa de cada elemento por su masa atómica relativa;
H- 9.063 / 1, C- 33.002 / 12, O - 57.935 / 16
H- 9.063, C- 2.75, O- 3.62
Dividir por la proporción más baja;
H-9.063 / 2.75, C- 2.75 / 2.75, O- 3.62 / 2.75
H- 3, C-1, O- 1
Fórmula emperical = CH3O
Dado que la masa molecular es 191 g / mol
Sea n el número de cada átomo de la molécula
Por tanto, su fórmula molecular es; (CH3O) n = 191
[12 + 3 (1) + 16] n = 191
31n = 191
n = 191/31
n = 6
Por lo tanto, la fórmula molecular del compuesto es; (CH3O) 6 que es C6H18O6
What is the simplest whole-number ratio of atoms in a molecule or formula unit called?
O the molecular fomula
O the molar mass
O the percent composition
O the empirical formula
Answer:
the empirical formula
Explanation:
I remember learning this last year.
Answer:
the empirical formula
Explanation:
The alkaline earth metal family element that has the largest atomic radius can be found in which period on the periodic table?
a)
7
b)
1
c)
2
d)
6
Answer:
c. 2
Explanation:
The alkaline earth family is the second most reactive group, and it's elements can't be found free in nature. They are called "alkaline" earth metals because they form "alkaline" solutions, hydroxides, when they react with water
PLS HELP NOW I NEED ANSWER WILL GIVE THANKS PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
What shape is the orbit of Mercury?
Why do you think the Sun is not at the center of Mercury’s orbit?
What did you notice about the motion of Mercury in its orbit?
Click on each highlighted section and record the area. What do you notice about each area?
Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Answer:
The shape of mercury orbit is egg and the second questions is basically Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or eastern horizon before sunrise, usually in twilight.
Explanation:
i hope this helped?
What effect does reusing or recycling municipal waste have on environmental resources? Group of answer choices increased use of fossil fuels preservation of raw materials introduction of pollutants into water systems increased deforestation of local areas
Answer:
preservation of raw materials
Explanation:
Reusing and recycling is the process by which the used products are used again or recycled in different form to use it again. Excessive use of the raw materials can lead to their extinction. Recycling the materials helps in decreasing the pollution in the environment. It also helps in reduction in the emission of the harmful gases. When municipal wastes are reused or recycled, the raw materials are preserved. These are the process involved in sustainable use of resources.
Which of the following is necessary for photosynthesis?
OA.
OB.
OC.
OD.
calcium
water
glucose
Oxygen
Answer:
OB
Explanation:
Water is necessary. Since during photosynthesis water reacts with carbon dioxide to form glucose and oxygen.
Calcium is a big NO!!.
Which of the following is an example of a chemical change?
a. freezing water to make ice.
b. a firework exploding.
c. breaking a glass bottle.
d. melting gold jewelry to make a gold bar.
Answer:
b. a firework exploding
Explanation:
what is the balanced equation of K3PO4 + HCI -> KCI + H3PO4?
Answer:
K₃PO₄ + 3HCl ⇒ 3KCl + H₃PO₄
Explanation:
practice these, it gets easier. goal is to match the amount of reactants and products on both sides of the equation. cheers!
PLEASE HELP ASAP I WILL GIVE THANKS TO WHOEVER ANSWER IT RIGHT JUST PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
Mars
What is the orbit of the Mars?
Is the Sun at the center of the Mars’s orbit?
Describe the motion of Mars throughout its orbit? Does it move at constant speed?
Answer:
Mars has an orbit with a semimajor axis of 1.524 astronomical units (228 million km), and an eccentricity of 0.0934 The planet orbits the Sun in 687 days and travels 9.55 AU in doing so making the average orbital speed 24 km/s.
The eccentricity is greater than that of every other planet except Mercury, and this causes a large difference between the aphelion and perihelion distances—they are 1.6660 and 1.3814 AU
Explanation:
Answer: i hope this helps :)
-- 687 days
-- After years of analysis, Kepler discovered that Mars's orbit was likely to be an ellipse, with the Sun at one of the ellipse's focal points. This, in turn, led to Kepler's discovery that all planets orbit the Sun in elliptical orbits, with the Sun at one of the two focal points.
-- From our point of view as we race around the Sun, Mars is falling behind; consequently, we see Mars moving in a retrograde direction from night to night across the sky. Since the Earth always moves around the Sun faster than Mars, you might imagine that Mars's motion will always be retrograde.
-- Basically, that planets do not move with constant speed along their orbits. Rather, their speed varies so that the line joining the centers of the Sun and the planet sweeps out equal parts of an area in equal times. The point of nearest approach of the planet to the Sun is termed perihelion
will the mass stay the same everywhere that an object goes?
Answer:
The mass of a given object is the same everywhere, but its weight can change. We use balances to measure weights and masses.
Answer:
yes its weight that changes.
HELP!!I WILL TIVE BRAINLIEST
Answer:
A
Explanation:
The answer is a because it is the best solution.Also this is the answer because I did it and got it correct.
Hope this helps:)
pls mark brainly
IV. Provide the chemical Name of below acid or base.
(a) Vinegar
(b) Fruits (orange)
(c) Curd
(d) Lime water
(e) Window cleaner
(f) Soap
V. When ‘X’ is added to ‘Y’ immediately ‘Y” turns to pink. Identify X.
VI. Give examples of a common acid and a common salt. Compare their composition. How do they differ and what do they have in common?
VII. Explain why pickles and jams should not be stored in metal containers.
VIII. Differentiate between weak acid and strong acid.
IX. Explain the reaction involved in the formation of sodium
chloride.
X. Why does a doctor give an antacid to treat indigestion?
Answer:
A)Acetic acid
a)citric acid
b)lactic acid
c)citric acid
d)NH3
f)oxygen hidro-oxide
Explanation:
How many moles of magnesium are in 3.01 x 1022 atoms of magnesium?
Answer: 3076.22
Explanation:
A student masses a sample of clay on a balance. She successfully creates it into the shape of an ice cream cone, a donut, and a hollow ball, massing the clay after each creation. Which clay creation will have the greatest mass?
A. Ice Cream Cone
B. Hollow Ball
C. Donut
D. The mass will be the same for all
Answer:
D
Explanation:
Because she is continuously using the same piece of clay, the mas does not change.
How many valence electrons are found in gallium? 3 5 7 8
Dissolved: Will give brainliest
Answer:
im 99% sure it's 175.
Explanation:
keep trucking, i know school is hard but you're doing amazing
The chemical equation S + 02 - S02 is an example of which type of reaction?
Single displacement
Combination
Double displacement
A particle containing 8 protons, 10 neutrons, and 8 electrons is called a(n)
O atom
O cation
O anion
molecule
O2- indicates an ion of oxygen having two extra electrons. I.e., since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).
Experiments show that light behaves like
as it travels through space.
O sound
O gravity
O + particles
O waves and particles
Answer:
The anwser is A
Explanation:
Answer:
As light travels from source to detection, it can behave as either a particle or a wave—or, paradoxically, both states or neither state. ... Eventually, researchers performing the so-called double-slit experiment demonstrated that Newton and Huygens were both right—photons of light could behave as both particles and waves.Oct 25, 2017
Explanation:
Which of these common substances is a mixture?
A Sulfur
B Pure Water
C Spagettios
D Nitrogen
Answer:
D
Explanation:
A is a compound
B is purified water
C is a substance made by two substances
Hope this helps
Step 6: Measuring the Volume of Air Near 40°C
Temperature of gas: 40
COMPLETE
Height of the column of gas: 6.7
cm
Volume of gas (V =)
Temperature of gas: 303K
help me find out how to get the volume !!! pleaseeee
The volume using the cylinder formula : V=πr²h
Further explanationCharles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
This experiment is an illustration of Charles's law, to determine the relationship between temperature and gas volume
If a certain amount of gas is heated, the volume will increase
So in this experiment, the temperature was changed as an independent variable and tube volume as a fixed variable
Because the tube is cylindrical, to find the volume using the cylinder formula
[tex]\tt V=\pi.r^2.h[/tex]
Meanwhile, to find the radius, you can use a caliper to measure the diameter of the tube and the result will be divided by 2
Answer:
1. Temp of gas 40C, Height of the column of gas 6.7
2. Temp of gas 313K, Volume of gas 0.84
Explanation:
Just answered on Edge
In a chemical reaction _________ are the substances present after the reaction?
(PLEASE HELP! I NEED TO GET THIS DONE BY 11:00 PM! SOMEONE TELL ME HOW TO GIVE BRAINILIST BEACAUSE THE PERSON THAT GETS THIS I WILL GIVE BRAINALIST! BUT I DONT KNOW HOW TO SO TELL ME PLEASE! HELPPPPPPPPPPPPPPPP!)
P.S(sorry about the long yelling and again... im in middle school so I am just going to pick chemistry because I don’t know which subject this is, it just says photosynthesis)
Answer:
The substances present after the reaction are called products.
Explanation.
They are called reactants at the start of the reaction.
What are families 3-12 on the periodic table called
Answer:
transition elements
Explanation:
Answer:
Noble gases: Group 8A of the periodic table. Transition elements: Groups 3 to 12 of the periodic table.
Explanation:
Sodium atom with electronic configuration 2,8,1 achieves stable electronic configuration by losing one electron thereby achieving stable electronic configuration of the nearest Noble gas
(argon/ neon/ helium).
A chemist used 6.5 moles of water in this reaction. How many grams of water were used?
please go into detail as to why that is the answer PLSSS
Answer:
[tex]\boxed {\boxed {\sf 120 \ or \ 117 \ grams \ H_2O \ depending \ on \ significant \ figures }}[/tex]
Explanation:
We want to convert from moles of water to grams of water.
First, find the molar mass of water (H₂O) Look on the Periodic Table for the masses of hydrogen and oxygen.
Hydrogen (H): 1.008 g/molOxygen (O): 15.999 g/molNext, add up the number of each element in water. The subscript of 2 comes after the H, so there are 2 moles of hydrogen.
2 Hydrogen: (1.008 g/mol*2) = 2.016 g/molFinally, add the molar mass of 2 hydrogen and 1 oxygen.
2.016 g/mol (2 Hydrogen) + 15.999 g/mol (1 oxygen)= 18.015 g/molNext, find the grams in 6.5 moles.
Use the molar mass we just found as a ratio.
[tex]molar \ mass \ ratio: \frac{18.015 \ g \ H_2O}{1 \ mol \ H_2O}[/tex]
We want to find the grams in 6.5 moles. We can multiply the ratio above by 6.5
[tex]6.5 \ mol \ H_2O * \frac{18.015 \ g \ H_2O}{1 \ mol \ H_2O}[/tex]
Multiply. Note that the moles of H₂O will cancel each other out.
[tex]6.5 * \frac{18.015 \ g \ H_2O}{1}[/tex]
[tex]6.5 * {18.015 \ g \ H_2O}[/tex]
[tex]117.0975 \ g \ H_2O[/tex]
If we want to round to the technically correct significant figures, it would be 2 sig figs. The original measurement, 6.5, has 2 (6 and 5).
[tex]\approx 120 \ g \ H_2O[/tex]
