Answer:
for the force that sent the person forward, there is an equal force pushing back on the skateboard
Answer:
Heterogenous
Explanation:
Heterozygous mixtures seperate and consist of two or more layers. For example, When oil and water are combined, they do not mix evenly, but instead form two separate layers. They also use filter and can scatter light.
Answer:
Explanation:
Hello.
In this case, given the chemical reaction, we can compute the grams of oxygen by using the 98.2 g of water via the 2:1 mole ratio between them, the molar mass of water that is 18.02 g/mol, the molar mass of gaseous oxygen that is 32.00 g/mol and the following stoichiometric procedure relating the given information:
In which the result is displayed with three significant figures because the given mass of water 98.2 g, has three significant figures too.
Best regards!
ANSWER
EXPLANATION
Given that
The energy released by the system is 12.4J
Work done on the surrounding is 4.2J
Follow the steps below to find the change in energy
In the given data, energy is said to be released to the surroundings
Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative
Step 1; Write the formula for calculating change in energy
Since heat is released to the surrounding, then q = -12J
Recall, that work done by the system on the surroundings is always negative
Hence, w = -4.2J
Step 2; Substitute the given data into the formula in step 1
Therefore, the change i
<span>first, we have to know what is electrolyte:
The electrolyte is a substance which breaks into cations + and anions - when dissolved in water.
now, to be able to classify electrolytes we have to look for:
1) If this chemical formula is one of the 7 strong acids (which are HCl, HBr, HI,
HNO3, HClO3, HClO4 and H2SO4) if the chemical formula one of them so,
this is a strong electrolyte.
2) when the chemical formula starts with H atom It's probably a weak
electrolyte. so here HBr is a strong electrolyte as it is one of the 7 strong
acids.
and HF is a weak electrolyte as it is a weak acid.
and Zn(NO3)2 is a strong electrolyte as it is soluble in water and form ions</span>