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prisoha [69]
3 years ago
5

Check all that apply. view available hint(s) water is known as a polar molecule because check all that apply. the hydrogen atom

attracts electrons much more strongly than the oxygen atom. the electrons of the covalent bond are not shared equally between the hydrogen and oxygen atoms. the oxygen and hydrogen atoms have the same electronegativity. the oxygen atom has a greater attraction for electrons than the hydrogen atom does. water dipole moment is equal to zero.
Chemistry
1 answer:
elixir [45]3 years ago
3 0
The first answer is the electrons of the covalent bond are not shared equally between the hydrogen and oxygen atoms because the hydrogen atoms attract the electrons less strongly. The second answer is the oxygen atom has a greater attraction for electrons than the hydrogen atom does because the nucleus of the oxygen atom has more positively charged protons.
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Determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
a_sh-v [17]

The volume of H₃PO₄ : 13.33 ml

<h3>Further explanation</h3>

Given

0.003 M  Phosphoric acid-H₃PO₄

40 ml of 0.00150 M Calcium hydroxide-Ca(OH)₂

Required

Volume of H₃PO₄

Solution

Acid-base titration formula  

Ma. Va. na = Mb. Vb. nb  

Ma, Mb = acid base concentration  

Va, Vb = acid base volume  

na, nb = acid base valence  (amount of H⁺/OH⁻)

H₃PO₄⇒3H⁺ + PO₄³⁻ ⇒ 3 H⁺ = valence = 3

Ca(OH)₂⇒Ca²⁺ + 2OH⁻⇒ 2 OH⁻ = valence = 2

Input the value :

a = H₃PO₄, b = Ca(OH)₂

0.003 x Va x 3 = 0.0015 x 40 x 2

Va = 13.33 ml

8 0
3 years ago
Think about what would happen if this substance were first in the solid phase, then melted in a liquid. What can you say about t
alexira [117]

Answer:

The melting point of the solid is higher in temperature then it is compared to the freezing point of the liquid.

Explanation:

3 0
3 years ago
An unknown solid is placed on a triple beam balance and has a mass of 2.5 grams. The solid then displaces 35 ml of water in a gr
Aleksandr [31]

Answer:

A

Explanation:

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6 0
3 years ago
Read 2 more answers
*Name three ways the organisms in a food web get energy.
Anuta_ua [19.1K]

Answer:

1.)photosynthesis, chemosynthesis, and the consumption, this is three ways how organisms in a food web gets energy.

2.)Cells use energy in order to grow, regulate metabolism and reproduce. This energy is obtained from a source such as food molecules or light from the sun, and through processes like glycolysis, the citric acid cycle and oxidative phosphorylation, an energy-rich molecule is then created. The cell can then use the energy in the protein molecule to help it function.

3.)Food webs vary according to habitat, but all food webs have some things in common. Primary producers make up the base of a food web. Phytoplankton . Consumers cannot make their own food so they need to get food from other sources. This means that we are close to being a consumer because we cant make up our own food and we have to get other food from animals and plants and our drinks from many things that go through the food web.

Explanation:

6 0
3 years ago
Properties volume to solid
Elan Coil [88]
4 States of Matter Properties - Solid, Liquid, Gas, Plasma

4 States of Matter Solid Liquid Gas Plasma
Volume/ Mass/
Density Definite Volume
Definite Mass
Definite Density Definite Volume
Definite Mass
Definite Density Changes volume
Definite mass
Changes density Changes volume
Definite mass
Changes density
Shape
Definite shape

00000
00000
00000

Changes shape

..000...
0000000

0 .......0...... 0
.....0
..............0 0 0

Changes shape

0.... ..0... 0
0 ..................0 0

.......0......
.....0
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Changes shape

0... ... 0
0 .............. 0

Relative position of atoms Fairly stationary
Locked in place
Tightly packed Not fixed, not locked
Free flowing
Loosely packed Relatively distant to other atoms Relatively distant to other atoms
Movement and collisions Vibrate in place Roll or slide over each other.
A few collisions Bounce and collide Fairly fast
Electrons stripped
Energy Low



Medium High Extremely high
Examples Rock Rock, paper, scissors Water, juice, tea Oxygen, hydrogen, water vapor Star, lightening, incandescent bulb
Compressibility force or pressure required High Little extreme pressure - stars - gravity, magnetic
Measured with Cubic meters... Liter, ml, qt. Gal. Cubic ...


4 0
3 years ago
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