Answer:
??i do know may i ask some questions?
Answer:
C,
Explanation:
3Mg + Fe2O3 ---> 2Fe + 3MgO
this is a single replacement reaction.
Fe
Cobalt
Sodium
Sn
Phosphorus
Florine
I don’t know
Mg
I don’t know
Calcium
C
Pb
Silver
Zinc
Nickel
Heat energy is supplied to materials and can cause an increase in temperature of the material. the formula is as follows
H = mcΔt
where H - heat energy
m - mass of material
c - specific heat
Δt - change in temperature - 40.0 °C - 22.5 °C = 17.5 °C
substituting the values
H = 175 g x 0.234 Jg⁻¹°C⁻¹ x 17.5 °C
H = 716.6 J
716.6 J is required
Answer:
Student 4, because a Brønsted-Lowry base always accepts a proton from an acid to form a conjugate acid.
Explanation:
That's the definition of a Brønsted-Lowry base.
Student 2 is wrong. All bases will neutralize acids. That doesn't tell you the type of base.
Student 3 is wrong. The pH of a solution doesn't tell you the type of base.
Student 1 is wrong. Both Arrhenius and Brønsted-Lowry bases react with acids to produce water and a salt.
