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serious [3.7K]
3 years ago
9

Which statement is true about the SI System?

Chemistry
1 answer:
Ludmilka [50]3 years ago
8 0

Answer:

is used in scientific measurements.

Explanation:

A complete metric system of units of measurements for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric....

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Which biome contains mostly coniferous trees and receives 35 to 100 cm of rain per year? deciduous forest taiga (boreal forest)
Sever21 [200]

option B, taiga (boreal forest).

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8 0
3 years ago
Read 2 more answers
What are deltaTb and deltaTf for an aqueous solution that is 1.5g nacl in 0.250kg h2o? Given Kb=0.51 C/m and kr=1.86 C/m
bulgar [2K]

Answer:

T_f for given question is 2.79 and T_b is 0.52

\Delta T_b = I \times K_b \times m {i- vant hoff’s constant ; Kb- constant ; m molarity }

M = no. of moles of the solute present in one kg of solution

Let the weight of amount of solute be “w” and its molecular mass be “M”

Let the mass of the solvent in the given question be “x”

\Delta T_b = I \times K_b \times (w/M)/ x

\Delta T_b = I \times K_b \times w/Mx

\Delta T_b = 1 \times 0.51 \times1.5/(0.250 \times 58.44) = 0.052

\Delta T_f = M \times K_f = 1.86 \times 1.5 = 2.79

4 0
3 years ago
In an endothermic reaction what is true of the enthalpy
charle [14.2K]

Answer is: a) is has increased.

There are two types of reaction:  

1) endothermic reaction (chemical reaction that absorbs more energy than it releases).

For example, the breakdown of ozone is an endothermic process. Ozone has lower energy than molecular oxygen (O₂) and oxygen atom, so ozone need energy to break bond between oxygen atoms.

2) exothermic reaction (chemical reaction that releases more energy than it absorbs).  

For example, ΔH(reaction) = -225 kJ/mol; this is exothermic reaction.

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4 years ago
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3 years ago
What is the balenced equation of Cu+H2SO4---> CuSO4+H2O+SO2
algol [13]
Balanced chemical equation :

1 Cu + 2 H2SO4 = 1 CuSO4 + 2 H2O + 1 SO<span>2</span>

hope this helps!.

8 0
3 years ago
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