Select one or more:
a. Chlorine forming a solid precipitate
b. Bubbles forming from hydrogen gas production
c. Solid zinc dissolving
d. Bubbles forming from chlorine gas production
B. 1s2 2s2 2p6 3s2 3p3
C. 1s2 2s2 2p6 3s1 3p3
D. 1s2 2s2 2p6 3s2 2d3
Answer:
1s2 2s2 2p6 3s2 3p2
Explanation:
you're welcome
In the reaction of hydrochloric acid and calcium carbonate, to balance the equation, the correct order of numbers would be 2 for HCl, and 1 for CaCO3, CaCl2, CO2, and H2O.
When hydrochloric acid (HCl) reacts with calcium carbonate (CaCO3) in concrete, it forms calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O). To balance this reaction, you could input the numbers: 2 HCl(aq) + 1 CaCO3(s) → 1 CaCl2(aq) + 1 CO2(g) + 1 H2O(l). This phenomenon is part of the larger concept known as a neutralisation reaction, where an acid reacts with a base to produce a salt and water. In this case, the hydrochloric acid is the acid and the calcium carbonate in the concrete is the base. This is also an example of a gas evolution reaction, as carbon dioxide gas is being produced.
#SPJ11
happens when John rubs his hands?
O A. The skin on his hands rapidly conducts heat, similar to metal.
O B. He traps heat between his hands because skin is an insulator. IS
O C. The particles In his hands vibrate faster because of friction.
O D. Thermal energy moves from his fingertips to his palms.
O E. He simulates a fever that'll raise his core body temperature.
Answer:
Fairly certain it's C. The particles In his hands vibrate faster because of friction :)
Answer:
C
Explanation:
Answer:
summer solstice
Explanation:
on june solstice the northen hemisphere leans more toward the sun giving us longer days and more strong sunlight and It's the opposite in the Southern Hemisphere where june marks the start of winter thus its the shortest day of the year
boiling point
color
reactivity
________________________________________________________
If a substance cannot be separated physically or chemically, it is __________.
a compound
an element
a solution
a mixture
___________________________________________________________________
If a substance cannot be separated physically, it is __________.
Question 6 options:
a pure substance
heterogeneous
a mixture
an alloy
___________________________________________________________________
How would you classify tap water?
Question 8 options:
a pure substance
a homogeneous mixture
a compound
a heterogeneous mixture
___________________________________________________________________
When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.
pure substance
homogeneous mixture
compound
heterogeneous mixture
reactivity
solution
mixture
homogeneous mixture
homogeneous mixture
i think the fourth one might be wrong sorry );
Which of the following would NOT be a physical property of matter?
reactivity
________________________________________________________
If a substance cannot be separated physically or chemically, it is __________.
an element
___________________________________________________________________
If a substance cannot be separated physically, it is __________.
an alloy
___________________________________________________________________
How would you classify tap water?
a compound
___________________________________________________________________
When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.
compound